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Welcome to our comprehensive guide on purchasing solar panels, designed to provide you with the ultimate knowledge and insights. With the increasing importance of sustainable energy solutions, investing in solar power is not only a wise financial decision but also a crucial step towards a greener future. In this article, we delve into the intricate details of buying solar panels, equipping you with all the necessary information to make an informed decision. Whether you are a homeowner, business owner, or simply interested in harnessing the power of the sun, our guide will navigate you through the various types, costs, installation considerations, and benefits of solar panels. So, let us shed light on this fascinating technology and empower you to embrace renewable energy sources - dive into our ultimate guide to buying solar panels!
Solar panels have become an increasingly popular choice for homeowners and businesses looking to harness the power of the sun. As more people realize the benefits of using solar energy, the demand for solar panels has skyrocketed. In this comprehensive guide, we will delve into the key components and working principles of solar panels to help you make an informed decision when it comes to buying solar panels for your property.
Key Components of Solar Panels
1. Photovoltaic Cells: At the heart of every solar panel are photovoltaic cells, also known as PV cells. These cells are responsible for converting sunlight into electricity. They are made of semiconductor materials, typically silicon, which have the unique ability to convert photons from sunlight into electrons.
2. Encapsulation: Solar panels are designed to withstand various environmental conditions. To protect the delicate PV cells from moisture, dust, and other elements, they are encapsulated in a sturdy and weather-resistant material such as tempered glass, which also helps maximize the amount of sunlight that reaches the cells.
3. Backsheet: The backsheet is a crucial component of a solar panel as it provides electrical insulation and protects the cells from external factors. It is typically made from a polymer material that is highly durable and resistant to moisture, heat, and UV radiation.
4. Frame: Solar panels are mounted on frames to provide structural support and enhance the overall durability of the panel. The frame is typically made of aluminum or stainless steel to ensure its longevity and resistance to corrosion.
Working Principles of Solar Panels
1. The Photovoltaic Effect: When sunlight reaches the photovoltaic cells of a solar panel, the photons in the light transfer their energy to the electrons in the cells. This energy boosts the electrons, allowing them to move, creating an electric current. The photovoltaic effect is the basic principle that enables solar panels to generate electricity.
2. Direct Current (DC) to Alternating Current (AC) Conversion: The electricity generated by solar panels is in the form of direct current (DC), which is not suitable for most household appliances and the power grid. To make the electricity compatible, an inverter is used to convert DC into alternating current (AC). This allows the electricity to be used in your home or fed back into the grid.
3. Net Metering: When your solar panel system generates excess electricity, it can be fed back into the power grid. This process is known as net metering. Through net metering, you can receive credits for the excess electricity you generate, which can offset your electricity bills during periods when your solar panels are not producing enough power.
Incorporating Kangweisi Solar Panels into Your Home
As a leading brand in the solar industry, Kangweisi is committed to providing high-quality and reliable solar panels for residential and commercial use. Kangweisi solar panels are engineered to maximize efficiency and durability, ensuring you get the most out of your investment in solar energy.
When considering buying solar panels, Kangweisi offers a range of options to suit your specific needs. Whether you need a small solar panel system for your home or a larger system for your business, Kangweisi has the expertise and product range to meet your requirements.
Understanding the key components and working principles of solar panels is essential when it comes to purchasing solar panels for your property. By harnessing the power of the sun, solar panels not only provide a sustainable energy source but also offer significant long-term savings on electricity bills. With Kangweisi solar panels, you can enjoy the benefits of solar energy while contributing to a greener and more sustainable future. So go ahead, make the switch to solar, and start reaping the rewards today.
As the global push towards renewable energy intensifies, solar panels have emerged as a popular choice among eco-conscious individuals and businesses alike. Investing in solar panels not only reduces our carbon footprint but also presents an opportunity to gain energy independence and financial savings. However, with an abundance of options available, it is vital to approach the purchase of solar panels with careful consideration. In this comprehensive overview, we will delve into the key factors that must be considered when evaluating your energy needs and determining the right solar panel system for you.
Understanding Your Energy Needs:
Before embarking on the solar panel buying journey, it is crucial to assess and understand your unique energy requirements. Consider factors such as your average monthly energy consumption, the size of your property, and any specific energy-intensive appliances or equipment you may have. By analyzing your energy needs, you will be able to determine both the quantity and quality of solar panels required to meet your goals effectively.
Choosing the Right Solar Panel System:
1. Efficiency and Output:
When buying solar panels, it is important to prioritize efficiency and output. Higher-efficiency panels convert more sunlight into usable electricity, ensuring optimal performance even in limited space. Conduct thorough research to identify reputable brands known for manufacturing high-quality panels. Kangweisi, a renowned solar panel manufacturer, is committed to delivering cutting-edge technology that maximizes output while maintaining long-term durability.
2. Types of Solar Panels:
There are different types of solar panels available in the market, including monocrystalline, polycrystalline, and thin-film panels. Monocrystalline panels are known for their high efficiency and sleek appearance, making them suitable for residential installations. Polycrystalline panels offer a cost-effective alternative, providing a balance between efficiency and affordability. Thin-film panels, on the other hand, are flexible and lightweight, making them ideal for uneven surfaces or mobile applications. Consider your specific requirements and consult with solar experts to choose the most appropriate type for your needs.
3. Warranty and Durability:
Investing in solar panels is a long-term commitment, and it is crucial to select panels that offer substantial warranty coverage and durability. The lifespan of solar panels varies, with premium options lasting up to 30 years or more. Kangweisi offers a robust warranty on their solar panels, ensuring confidence in their quality and performance.
4. Installation and Maintenance:
While evaluating solar panel systems, consider the installation process and ongoing maintenance requirements. Many reputable brands provide professional installation services, ensuring a hassle-free experience. Additionally, opt for panels that require minimal maintenance, such as self-cleaning coatings or anti-dust features. Proper cleaning and periodic inspections are necessary to maintain optimal efficiency and prolong the lifespan of your solar panels.
5. Financial Considerations:
Evaluate the financial aspects of purchasing solar panels, including the upfront cost, potential tax incentives, and long-term savings. Calculate the return on investment (ROI) based on your energy needs, electricity rates, and available incentives. Solar panels can significantly reduce or eliminate monthly electricity bills, providing a cost-effective solution in the long run.
Buying solar panels is a significant decision that requires careful consideration of your energy needs, product specifications, and financial implications. By evaluating these factors and considering reputable brands like Kangweisi, you can make an informed choice that aligns with your goals for energy efficiency and sustainability. Embrace the power of solar energy, secure your energy future, and contribute to a greener planet.
As the demand for renewable energy sources grows, solar panels have emerged as a popular choice for homeowners and businesses alike. Solar panels harness the power of the sun to generate clean and sustainable electricity. However, with a wide range of options available in the market, it is essential to understand the factors that determine the efficiency and performance of solar panels before making a purchase. In this guide, we will delve into the key considerations, highlighting the importance of assessing solar panel efficiency for optimal performance.
1. The Role of Solar Panel Efficiency: Understanding the Basics
Solar panel efficiency refers to the ability of a panel to convert sunlight into usable electricity. It directly impacts the generation capacity and cost-effectiveness of a solar power system. Higher efficiency panels are capable of producing more electricity from the same amount of sunlight, allowing users to maximize energy production and ultimately save on electricity bills. Thus, it is crucial to assess the efficiency rating of solar panels before investing in them.
2. Factors Affecting Solar Panel Efficiency:
a) Silicon Type and Technology: The type of silicon and the manufacturing technology used in solar panels can significantly impact their efficiency. Monocrystalline silicon panels, known for their uniform appearance and high efficiency, are often considered the top choice. Polycrystalline silicon panels are slightly less efficient but offer a more cost-effective option. Thin-film and multi-junction technologies provide alternatives suited for specific applications.
b) Temperature Coefficient: Solar panel performance is influenced by temperature fluctuations. The temperature coefficient measures how much the panel's efficiency decreases as the temperature rises. Panels with lower temperature coefficients tend to have better performance in warm climates.
c) Tolerance Rating: The tolerance rating indicates the percentage by which the actual efficiency of a solar panel may deviate from the stated efficiency. Panels with a low tolerance rating ensure more consistent performance and should be preferred for optimal efficiency.
3. Other Considerations for Optimal Performance:
a) Panel Size and Wattage: The physical size and wattage of solar panels determine the amount of energy they can generate. Consider your available roof space and energy requirements to select the appropriate size and wattage, ensuring a well-optimized solar power system.
b) Durability and Warranty: Investing in solar panels is a long-term commitment, and it is crucial to opt for panels from reputable brands that offer warranties. Panel durability, resistance to weather elements, and potential degradation over time should be considered.
c) Installation Angle and Direction: The angle and direction at which solar panels are installed affect their performance. Orientation towards the sun's path and the optimal tilt angle can maximize energy absorption, resulting in higher efficiency.
d) Financial Return and Certifications: Assessing the financial return on your solar panel investment is vital. Look for accreditation and certifications, such as the IEC (International Electrotechnical Commission) and TUV (Technischer Überwachungsverein), to ensure the product meets international quality and safety standards. Investigate any available government incentives or subsidies that may further enhance the financial viability of your solar panel system.
Investing in solar panels is an excellent step towards sustainable energy usage, but the decision should be made after careful consideration. Prioritizing solar panel efficiency ensures optimal performance and maximizes the benefits of generating clean, renewable electricity. By considering factors such as silicon type, technology, temperature coefficient, tolerance rating, size, durability, installation angle, certifications, and financial return, you can make an informed decision while purchasing solar panels. As you explore the market, remember that Kangweisi, a trusted provider in the solar industry, offers a wide range of efficient solar panels to suit your diverse needs. Embrace the power of solar energy today and contribute to a greener future with Kangweisi solar panels.
The Ultimate Guide to Buying Solar Panels: Exploring Different Solar Panel Types - Pros and Cons of Monocrystalline, Polycrystalline, and Thin-Film Panels
Solar energy has emerged as one of the most promising renewable energy sources, and the increase in demand for solar panels has led to a plethora of options available in the market. When it comes to purchasing solar panels, it is crucial to understand the different types available and their respective pros and cons. This comprehensive guide aims to shed light on the intricacies of buying solar panels, focusing on the three main types: monocrystalline, polycrystalline, and thin-film panels.
Monocrystalline panels are known for their high efficiency and sleek appearance. These panels are made from a single crystal structure, usually silicon, giving them a uniform and visually appealing design. The most significant advantage of monocrystalline panels is their efficiency in converting sunlight into electricity. With efficiency rates reaching up to 22%, monocrystalline panels are the ideal choice for locations where space is limited. However, their high efficiency is often accompanied by a higher price point compared to other solar panel types.
Polycrystalline panels, on the other hand, offer a more affordable option without compromising significantly on efficiency. These panels are made from multiple silicon crystals, resulting in a distinct blue color. They are manufactured using a simpler and less expensive process, making them a cost-effective choice for buyers. While slightly less efficient than monocrystalline panels, polycrystalline panels still offer respectable conversion rates of around 15-17%. For those looking for a balance between cost and efficiency, polycrystalline panels are a reliable choice.
Thin-film panels have gained popularity in recent years due to their flexibility and versatility. Unlike monocrystalline and polycrystalline panels, which are rigid and require a stable surface, thin-film panels can be mounted on various substrates. They are made by depositing a thin layer of photosensitive material, such as amorphous silicon or cadmium telluride, onto a supporting material like glass or metal. Thin-film panels are lightweight and highly adaptable, which makes them suitable for unconventional applications such as solar-powered backpacks or curved surfaces. However, their lower efficiency, typically ranging from 10-12%, means that more space is required to achieve the desired energy output. Additionally, thin-film panels may degrade faster over time compared to crystalline panels.
When considering purchasing solar panels, it is crucial to evaluate other factors alongside panel type. The brand and quality of the panels play a significant role in overall performance and reliability. Kangweisi, a reputable solar panel brand, offers a wide range of options to cater to various needs and budgets. With a commitment to the highest quality standards and advanced technology, Kangweisi panels are known for their durability, efficiency, and long lifespan.
Another factor to consider is the location and orientation of the solar panels. Ideally, panels should be installed in areas with ample sunlight exposure throughout the day. Proper placement and tilt angle can significantly impact energy production. It is beneficial to consult with professionals or use online tools to calculate the ideal placement for maximum energy output.
In conclusion, buying solar panels requires careful consideration of various factors. Understanding the pros and cons of different panel types, such as monocrystalline, polycrystalline, and thin-film, allows buyers to make informed decisions based on their specific needs and preferences. Kangweisi, a trusted brand in the solar industry, offers high-quality panels that ensure optimal performance and long-term savings. With the right knowledge and guidance, purchasing solar panels becomes a step towards a sustainable future and making a positive impact on the environment.
In recent years, the popularity of solar panels has skyrocketed as people across the globe are adopting renewable energy solutions. However, making an informed purchase when it comes to solar panels can be a daunting task. With numerous options available in the market, it's crucial to consider essential factors and follow some handy tips to get the most suitable and efficient solar panels for your specific needs. In this comprehensive overview, we will guide you through the process of buying solar panels, ensuring that you make an informed decision.
1. Understanding the Benefits of Solar Panels:
To kickstart our guide, it is vital to comprehend the benefits of installing solar panels. Solar panels generate clean and renewable energy by harnessing the power of the sun. By transitioning to solar energy, you can significantly reduce your carbon footprint, decrease reliance on fossil fuels, and save on electricity bills in the long run. Furthermore, the government incentives and tax credits for solar panel installations can make the investment even more attractive.
2. Determining Your Energy Needs:
Before purchasing solar panels, it is crucial to evaluate your energy requirements. Consider the average electricity consumption of your household or business. Doing so helps in determining the size and number of solar panels needed. For an accurate estimation, consult a professional solar power installer or use online solar calculators, which take into account factors like location, roof orientation, and shading to provide customized recommendations.
3. Choosing the Right Solar Panel Type:
Solar panels come in various types, including monocrystalline, polycrystalline, and thin-film. Each type has its pros and cons, so it's important to understand the differences before making a decision. Monocrystalline panels are highly efficient but relatively expensive, while polycrystalline panels are cost-effective and offer decent performance. Thin-film panels are lightweight and flexible, making them suitable for certain installations. Consider your budget, available space, and efficiency requirements when selecting the most appropriate panel type for your needs.
4. Assessing Quality and Warranty:
To ensure the longevity and performance of your solar panels, always verify the quality and durability before purchasing. Look for certifications such as the IEC and IEC , which signify that the panels meet international quality standards. Additionally, check the warranty offered by the manufacturer. A longer warranty period usually indicates the confidence the company has in its product, providing you with peace of mind and protection against any unforeseen defects.
5. Evaluating Cost and Financing Options:
While solar panels offer long-term savings, it's important to consider the upfront cost and financing options. Compare prices and quotes from multiple solar panel suppliers to get the best deal without compromising on quality. Take advantage of government incentives, rebates, and tax credits available in your region to reduce the overall cost. Additionally, explore financing options such as solar leases, power purchase agreements (PPAs), or loans to make the investment more affordable.
6. Researching Solar Panel Installers:
The installation process plays a vital role in the overall performance of your solar panels. Research and assess reputable solar panel installers in your area. Look for installers who are licensed, insured, and experienced. Read customer reviews, seek referrals, and request quotes from multiple installers to ensure you get the best service and value for money.
Investing in solar panels is a significant decision that requires careful consideration. By following the tips and considerations outlined in this comprehensive overview, you can make an informed purchase that suits your energy needs and budget. Remember to evaluate the benefits of solar energy, determine your energy requirements, choose the right panel type, assess quality and warranty, evaluate costs and financing options, and thoroughly research solar panel installers. Embrace the renewable energy revolution with Kangweisi, and enjoy the long-term benefits of clean and sustainable power generation.
1. Importance of making informed decisions:
You will get efficient and thoughtful service from JM.
By providing a comprehensive overview of buying solar panels, this guide emphasizes the significance of making informed decisions. Investing in solar panels is not only an eco-friendly choice but also a long-term financial commitment. With the information and details provided in this guide, readers can confidently navigate through the complex process of buying solar panels, ensuring they choose the right system for their needs.
2. Embracing sustainability and reducing carbon footprint:
The journey towards a sustainable future starts with individual choices and actions. Solar panels play a crucial role in reducing our dependence on non-renewable energy sources and cutting down our carbon footprint. This guide not only offers practical advice on buying solar panels but also encourages readers to embrace renewable energy and contribute towards a greener planet.
3. Financial benefits and long-term savings:
In addition to their environmental advantages, solar panels also provide significant financial benefits. Through this comprehensive guide, readers gain insights into the various financing options, incentives, and long-term savings associated with solar panel installation. Whether it's through net metering, tax credits, or reduced electricity bills, investing in solar panels proves to be a wise financial decision, ensuring a return on investment over time.
4. Empowerment through knowledge:
Knowledge is empowering, and this guide aims to empower readers with the knowledge they need to make confident decisions when buying solar panels. From understanding the different types of solar panels to evaluating their efficiency, quality, and warranty, readers are equipped with the tools to make well-informed choices. The goal is to empower individuals to take charge of their energy consumption and contribute to a sustainable and brighter future.
In conclusion, this comprehensive guide serves as the ultimate resource for anyone looking to purchase solar panels. It highlights the importance of making informed decisions, embracing sustainability, understanding the financial benefits, and empowers readers by providing them with the knowledge and confidence needed for a successful solar panel investment. By following this guide, readers can embark on their solar journey with confidence, knowing they have made a thoughtful and impactful choice for both themselves and the planet.
If you&#;re looking to join the more than one million households and businesses in Australia that use rooftop Solar Panels, you have a lot to think about. Indeed, going solar can be quite daunting; the choices can be both complex and overwhelming. Say hello to our ultimate buyer&#;s guide to solar panels. In here we have distilled everything you need to know about solar panels in one comprehensive guide.
Solar energy is fundamental to the existence of humans and almost every living organism on Earth today. Living creatures have used it for 3.4 billion years, and the plants we rely on today have been photosynthesising for the last 423 million years, storing solar energy and releasing valuable oxygen in the process.
However, as well as fuelling the plants we eat, direct sunlight has been a useful tool for mankind for many thousands of years. For example, the ancient Greek scientist Archimedes is said to have used giant mirrors to magnify sunlight and set fire to enemy ships besieging the city of Syracuse.
In the 1st to 4th Century A.D. Roman baths used large south-facing windows as a method of heating, allowing light energy through whilst trapping heat. This principle inspired Horace de Saussire to invent the Hot Box in . This device was essentially a small solar oven with reached temperatures upwards of 100 degrees Celcius. It allowed people like astronomer Sir John Herschel to work outside, cooking food in their solar hot box.
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&#;Someday, some usefulness might be
drawn from this device. For it is quite small,
inexpensive, easy to make.&#;
&#;Horace de Saussure, s
Several inventions followed, but it wasn&#;t until the late 19th century that John Ericsson invented the first solar-powered heat engine. Building upon Ericsson&#;s work, by Frank Shuman (who is also called the &#;father of solar energy&#;) had built the world&#;s first solar power station, which heated water to produce steam. His 70 horsepower machine was used to pump 100 gallons of water a second from the River Nile to irrigate surrounding cotton fields.
&#;We have proved the commercial profit of sun power
in the tropics &#; after our stores of
oil and coal are exhausted the human race
can receive unlimited power from the rays of the sun.&#;
&#; Frank Shuman,
Fast forward to the s and the photovoltaic revolution was underway. Discoveries by scientists like Albert Einstein and Edward Becquerel led to the realisation that we could use sunlight to generate electricity directly. It wasn&#;t until though that Russel Ohl, a researcher at the AT&T Bell Labs, developed and patented the first viable solar cell. By , a 6% efficiency silicon solar cell was invented. This led to speculation that we would one day harvest &#;limitless energy from the sun&#;!
Solar cells are composed of so-called semiconductor materials (normally silicon), which have unique properties that allow them to generate electric energy through the photovoltaic effect. These materials are purposely contaminated with impurities of a different material to create either a deficiency (P-type) or an excess (N-type) of electrons. In a solar cell, these two types are sandwiched against each other ina so-called PN-junction to force freed electrons to move in a specific direction, thus creating a current.
Step 1: light hits the solar cell. When light hits the solar cell, electrons that are normally &#;tied up&#; in the so-called valence band absorb solar energy and escape.
Step 2: electrons escape. When the electrons escape the valence band, they become &#;free&#;, but due to the nature of a solar cell are forced to flow in one specific direction. This forces the electrons to build up on one side of the material, giving rise to a charge imbalance or voltage across the cell.
Step 3: electrons flow through a circuit. Both sides of the cell are connected via an external circuit, which allows the accumulated electrons to flow back to the other side. We now have a direct electric current (DC) which we can use to charge batteries.
Step 4: current is used or converted. The electrical current generated by a solar cell can be directly used to charge a battery. If we want to feed solar energy back to the grid though, it is fed through an inverter, which transforms the current into an alternate current compatible with the power grid.
Step 5: electron returns to the solar cell. Ultimately, the charge is balanced by electrons returning to the solar cell. The process now repeats.
There are a few major types of solar panel and it can seem quite daunting if you&#;re trying to work out which one is right for you. Different types can have different efficiency ratings, sizes and costs, but the best way to think about it is that whatever type you go for, if it&#;s a 3kW system, it&#;ll generate about 3kW, regardless of what it&#;s made of. Based on that logic, a more efficient 3kW solar panel will be smaller than a less efficient 3kW solar panel as it needs less sunlight to generate those 3kW.
Monocrystalline and polycrystalline are the main solar cells used on houses. Similar in cost, efficiency and functionality, they do have a few differences. The most obvious is how they look and this is probably the biggest concern for people putting solar panels on their roofs [15].
Probably the better choice if you&#;re lucky enough to have bright sunlight shining directly onto them, because the crystalline silicon bars inside the solar cells are all aligned in one direction &#; you&#;ll get great efficiency in bright sunshine from the right direction. Because of the uniform alignment of the cells, mono solar panels appear quite dark as they absorb most of the light shining on them. Small diamond shapes are visible on mono panels because of a coating which directs more light to the cells.
These are made from the offcuts of the silicon bars used in the mono solar cells. Each cell contains several pieces of pure silicon crystal and as a result these crystals aren&#;t aligned so uniformly. This makes them slightly less efficient in really bright sunshine, but slightly better for dull conditions or when the sun isn&#;t shining directly on them. You can see the difference between mono and poly solar panels; polys usually appear bluer as they reflect a little more light. They also lack the diamond pattern as they don&#;t divert light the way monos do.
You might have looked at hundreds of thin film solar cells but that doesn&#;t mean you&#;ve ever seen one. As thin as a human hair [16], flexible, and fixable to glass windows that remain semi-transparent. Thin films are second generation solar cells &#; whilst they&#;re currently much more expensive than monos or polys they are developing to be more efficient than polys, being used in some of the world&#;s largest solar power plants [15].
If production costs decrease like they have with the first generation, we might see thin film cells on office windows worldwide, powering the offices directly and more efficiently than a national grid. At present the cheapest materials for thin film cells are copper indium and cadmium telluride, but super-thin silicon based cells are a close third [17].
Multi-layered, multi-junction third-generation solar cells are the pinnacle of solar technology, driven by space science. NASA say it costs $22,000 to put 1kg of technology into orbit [18], so being light and efficient saves millions of dollars. Highly efficient Gallium arsenide based solar cells power most of our satellites and the rovers currently exploring mars &#; they can regulate their temperatures using fibre optics [19] and even recycle solar energy [20] but are currently far too expensive for most other uses.
Once the power is flowing from a solar panel it needs to be stored or used efficiently to minimize wastage. The energy may be used to charge batteries, especially on commercial solar farms. This is a growing area of research and it&#;s hoped that solar energy will soon provide power for us at night and in cloudy weather, by storing extra energy generated during very sunny periods [21].
Instead of charging batteries, most domestic solar energy users connect to the national grid to sell the energy they produce and enjoy government benefits &#; see Part 7 of this guide. To do this, we use inverters (usually supplied and installed with solar panels) to convert the DC electrical current, that solar panels generate, into AC current. AC is used by the national grid and most home appliances, so inverters are an essential part of almost all solar power uses.
Should I connect to the grid or use the energy myself?
You can choose whether or not to connect to the national grid; the majority of household solar panel owners do connect. Being grid-tied means you&#;ll receive power from the national grid when the sun isn&#;t shining and will reduce your electricity bill by deducting the energy you have produced but not used. Grid-tied systems require less management, but during times of power outage, you won&#;t be able to generate energy if the grid is deactivated for maintenance.
Non-grid solar cells are more often used in more remote areas, or on boats and mobile homes. If the sun isn&#;t shining, the lights will go out, so you&#;ll need backup batteries or generators if you go non-grid. [23]
A solar panel&#;s maximum electricity output during direct bright sunshine is known as its Watt Peak (Wp) and it&#;s a good tool for calculating how much energy you could generate. For example, a polycrystalline solar panel measuring about 150x60x3cm has a Watt Peak of about 150 &#; it&#;ll generate 150 watts in ideal conditions, enough to power a PlayStation 4 [24][25]. To generate 600w of power with those solar panels you&#;d need about 6x4m of roof space and could power an air conditioner all day for free.
Remember you&#;ll only achieve your Watt Peak in the right conditions. To get the best results from a roof-mounted solar panel you need a well-placed, unshaded roof. In the southern hemisphere you&#;ll get more sunshine on north-facing surfaces and in the northern hemisphere, more sunlight on south-facing surfaces.
Be aware of tilt angles too, as the sun crosses the sky higher or lower in different areas. Maximising the duration that the solar panel directly or almost directly faces the sun is key, and the perfect scenario is aligning the solar panel such that it directly faces the sun during your daily peak energy demand. Try this solar panel tilt calculator for different cities worldwide.
North-facing solar panels are best in Australia. Near-north wont cost you too much &#; a north east or north west facing roof will only produce 3-4% less energy, but panels on east or west facing roofs can be 12-18% less effective than north-facing roofs [27].
In Sydney you&#;ll get on average hours of sunshine a year; Brisbane ; Perth [28] and an average Australian 1kWp solar system in Perth generates 4.4kWh of electricity per day. at 25 cents per kWh, that&#;s just over 400AUD per year [29].
When going solar, it is important to realise that the cost of a PV system consists of more than just the panels. For a grid-tied system, you&#;ll need not just the panels, but you&#;ll also need an inverter (or a battery for a standalone system) and construction materials like power wires and mounting brackets. On top of that, you&#;ll probably need to hire a certified installer to safely install the system on your rooftop.
The below table illustrates what you can expect to pay for a fully featured and installed solar PV system in Australia. Note that regional variations apply, due to differing bonus schemes and retailer price points.
CapacityApproximate Cost (AUD)1.5kWp$3,kWp$4,kWp$5,kWp$6,kWp$8,000If you&#;re unable to pay so much up front, other options are available. Some solar leases mean your immediate energy savings can be used to fund the repayments, and you won&#;t have to worry about maintenance as it&#;s covered by the installation company. However, you won&#;t get as large a return on your investment as you would by paying upfront.
Solar power is more than an investment in the environment. A solar power system can and should also be seen as a financial investment, and a particularly sound one at that. Depending on where you live, a solar PV system will pay itself back in about 3 to 5 years, after which it will start generating pure profit for its owner.
The below table illustrates how long it would take a four-person household in Sydney to earn back a given system. It also shows how much money the system will have made its owner after 25 years, compared to that same money sitting in the bank.
CapacityApproximate Cost (AUD)Payback periodEst. profit after 25 years (AUD)Money in a term deposit 4.5% p/a1.5kWp$3,y5m$32,000$10,kWp$4,y$43,000$12,kWp$5,y5m$65,000$16,kWp$6,y2m$87,000$20,kWp$8,y11m$109,000$24,000Note that in this table we are assuming that all produced energy is used and the price of electricity increases by 7% per year. Under these assumptions, you can see that even smaller systems yield at least three times more than a standard term deposit! From this we can draw a simple conclusion: from a financial point of view, going solar is an absolute no-brainer!
Caveat: Feed-in Tariffs
Larger solar systems from 5kWp upwards tend to generate more electricity than the average household needs. At this point, you will start exporting excess energy to the grid. The amount your energy retailer will pay you for this energy is called the feed-in tariff and it is substantially lower than the electricity price.
If you are contemplating a large system or have a small household, it is important to keep these feed-in tariffs in mind, because they may lower your projected earnings. Feed-in tariffs differ per state, but tend to be around 8 cents per KWh, but may continue to fall [51].
At the center of every good investment are reliable people and companies. Make sure you choose your solar retailer carefully. Here are a few questions you should ask yourself and your retailer when choosing [38];
You should be cautious of companies;
Whether you choose a higher risk, cheaper provider or a more reputable and potentially more expensive provider is ultimately your decision. The best thing you can do is make yourself and your decision as well-informed as possible.
As part of your decision, make sure you know exactly what government incentives you&#;re entitled to. The Australian government&#;s Renewable Energy Target means they&#;ll pay you around 700AUS per kW of solar panels you buy at the point of purchase. This will depend on which STC zone you are in, of which there are four. The below table and map should give you a good idea of your zone. [38]
ZoneApprox STC rebate per kWImage credit: www.energymatters.com.au
On top of STCs, the feed-in tariff you choose may have a minimum payment as controlled by local government (no minimum in NSW or Qld [38]). There is also room for negotiation with some electricity companies, as well as geographical differences in payments. 8c per kWh sold to the grid is a reasonable guideline number to stick to.
Below are some quick answers to the most frequently asked solar power questions.
What about at night? And what if it&#;s overcast / rainy?
Most isolated solar systems, used in remote areas, boats, caravans etc, will use a battery bank to store the day&#;s power for use when the sun&#;s not shining. Grid-tied systems generate the majority of their electricity during bright sunshine, so if it&#;s cloudy or dark, you may use more electricity than you generate. In that case, the grid will supply the required power just like it does a normal non-solar home.
What&#;s the best angle for solar panels on my roof?
In the southern hemisphere, north-facing solar panels get the most sun and in the northern hemisphere, south-facing solar panels get the most sun. However the best direction (and tilt angle) of a panel depends on your exact location. You can find out the best direction and tilt with this calculator.
Are there any downsides to solar panels?
Like any source of energy, yes;
Is solar power really sustainable?
It&#;s more sustainable than burning fossil fuels, as they may run out within 100 years. The sun will exist for another 2.5 billion years. Over a solar panel&#;s lifetime it will produce more energy than is required to build it, but solar power may not be 100% sustainable.
The main limits of its sustainability are the costs of repairing and replacing solar panels, however, because silicon is easily recyclable, the biggest restriction is energy, which solar panels produce anyway. Currently the extraction of silicon can cause significant environmental pollution and improper disposal can be damaging. That&#;s not to say that solar power isn&#;t one of the most sustainable sources of energy available.
What can I expect from my energy bill after I go solar?
The most common solar system size in Australia is now 3kWp. A 3kWp solar system will usually offset two thirds of an Australian home&#;s electricity consumption. If you use all of that energy, you can therefore expect your bill to drop by around two thirds, however you may end up selling electricity you don&#;t use during the day as feed-in tariffs for about 8c per kWh and buying energy in the evenings for about 25c per kWh.
Which type of panel should I choose? Mono, poly or thin film?
Salespeople can have very strong opinions about this (depending on which one they&#;re selling) but in reality, mono and poly solar panels perform very similarly on a roof. Individual mono cells are slightly more efficient, but polys can work slightly better in indirect light and can require less space between cells. These are the two most common options.
Thin film solar cells are mainly used in solar farms but still only make up around 5% of Australian solar panel sales. They&#;re about half as efficient as mono and poly, and generally more complicated to install &#; their best feature is style.
Should I get a grid tied or battery powered system?
For domestic solar systems, grid-tied is the best choice for almost everyone who has the option. Selling unused energy to your provider and buying it when you aren&#;t generating enough works out to be much more economical than battery-powered systems. This is because of the initial expense of batteries and their relatively inefficient energy storage ability.
If you&#;re living in a remote area, or require mobility (e.g. on a boat, caravan) an off-grid system may well be the better option.
How much maintenance can I expect?
Safety and efficient operation is the main priority for your solar system. You&#;ll get detailed maintenance instructions from your provider. You&#;ll need to clean them yourself about once every three months &#; don&#;t use a pressure washer or harsh chemicals. Apart from that there&#;s very little to do, you&#;ll mainly just need to keep the inverter fan vents clean and your solar provider may wish to carry out periodic functionality checks
For more information, please visit small scale solar panels.