Portable solar panels are one of the cleanest, most cost-effective ways to keep your devices powered. Paired with solar generators, they can store energy for later use. Ideal for camping, road-trips, van life, or even during a blackout.
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Solar panels come in a bunch of shapes and sizes, so there are a few questions you should ask yourself before you buy. In this blog post, we&#;ll tackle five things to help you make a choice:
When pairing your foldable solar panel with your solar generator, you&#;ll want to consider the capacity of the battery. A larger battery will be suited to a larger solar panel, or even multiple solar panels chained together. However, if your power station has a smaller capacity, you can get away with a much smaller panel as you have less capacity to charge.
Let&#;s take EcoFlow DELTA Pro as an example of a large power station. It has a Wh capacity, expandable all the way to 25kWh. In this case, a small solar panel will take a long time to charge your unit to full. Here you should use larger panels such as EcoFlow&#;s 400W panels (coming ), or you can chain multiple smaller 160W panels together. With multiple solar panels, you&#;ll be able to charge larger EcoFlow power stations in mere hours.
If you&#;ve got a power station that puts portability first, such as EcoFlow RIVER 2 Pro (768Wh) or EcoFlow DELTA (Wh), you might want to opt for smaller panels to stay travel friendly. A good pick here might be a 110W EcoFlow Solar Panel or the 160W option. Again, you can chain panels together here to charge up in 4&#;8 hours.
You should double-check that your power station supports a high solar input, has an solar charging port, and supports a wide voltage range. Some power stations lack sufficient solar input and voltage ranges. EcoFlow portable power stations all have high solar input for their sizes, ranging from 256W for the EcoFlow RIVER 2 series to a massive W for EcoFlow DELTA Pro.
For different uses, you&#;ll want different kinds of portable solar panels. Let&#;s take three use cases:
If you&#;re solely looking for home backup, you&#;ll likely have a larger solar power generator, such as a EcoFlow DELTA Pro or EcoFlow DELTA Max. In this case, the same advice applies, a larger portable solar panel or multiple panels would be best for faster charging. EcoFlow DELTA Pro also supports rooftop solar when the grid is online, a nice touch when integrated with your home via the EcoFlow Smart Home Panel.
With camping on the rise, the need for outdoor power is on the rise too. If you&#;re heading camping, portability is usually an important factor. Your panel should also be dust + water-resistant. Here, EcoFlow&#;s 110 or 160W panels would be good picks as they&#;re compact & efficient too.
With the above in mind, you&#;ll start to get an idea of what kind of solar panel you need. If portability is more important to you, you might opt for a smaller panel such as EcoFlow&#;s 110W panel. The larger EcoFlow 160W solar panel is a good middle ground, with the 400W option a good choice if you need to maximize charge speed for larger power stations.
Whichever panel you go for, they&#;re all foldable, come with a kickstand carry bag, and are dust and water resistant.
TLDR? Here&#;s a summary. When shopping for a solar panel, you should consider the solar panel&#;s wattage (the higher, the faster your power station will typically charge), portability, and also dust & water resistance. You should also double-check your solar generator&#;s limitations for solar input, voltage and ensure it has solar charging ports.
You can weigh up what is most important to you to pick the right panels & compare options here.
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There is an awful lot of confusion (and misinformation) out there about the practicalities of installing solar on a house that has a 3 phase supply. So I&#;ve written this post to clear up the confusion.
Connecting solar power to a 3 three-phase supply is entirely possible. But you need to decide how you are going to connect your solar system to the grid. Your 3 options are:
1) connect your solar system to only one of your supply phases with a single-phase solar inverter.
2) connect your system into all 3 phases of your supply with a single, 3-phase solar inverter
3) connect your system into all 3 phases with 3 separate single-phase inverters.
Here&#;s what you need to consider in deciding which option to go for:
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Three phase billing
Now that Feed In Tariffs are generally between 6 and 10c per kWh, compared to an electricity price of 30c or more, naturally people installing solar want to self consume as much of their solar energy as possible and minimise the flow of exported solar electricity.
So most of the emails I get these days about 3 phase worry that if they choose option 1 they will lose out. They worry that any electricity they use on the 2 phases that are not connected to solar will all be imported at 30c per kWh no matter how much solar they are generating on the solar phase.
I have personally never seen an installation where this happens. All the 3 phase meters that I have seen take into account the sum of all the electricity being used on all the phases and then subtract that from the amount of solar energy being generated to calculate the import or export amount for billing. i.e. if you are on a stingy FiT, they don&#;t penalise you financially for having a single-phase inverter on a 3 phase supply.
But to muddy the waters, I have seen evidence and heard from some installers that say they have seen 3 phase meters that have been configured to only calculate exports based on the solar phase. So buyer beware!
Three-phase load balancing
Having said the above, it is important to note that it is not unusual for the demand across phases to be unbalanced; i.e. a lot more load on one or two of the phases. For solar financial payback, this is less of an issue (due to the summed billing) however, from a technical perspective, balancing consumption and generation across the phases is a good thing for power quality.
I have seen cases where voltage is problematic on a particular phase causing inverters to trip out; such as where a large pump or cool room is on that phase and presents high start-up demands. In such a case, you should consider putting the inverter on a more stable phase; they don&#;t like unstable voltage or frequency at all.
Ultimately, a bit of instantaneous and energy consumption demand analysis should be considered a prerequisite to connecting solar to three-phase systems. Your utility or perhaps a friendly solar installer can help with this. If you have three-phase, it is even more important that you choose a qualified solar installer to talk to initially, instead of a less qualified solar salesperson &#; who probably hasn&#;t got the electrical background to understand the nuances of multi-phase electricity supplies!
If you have a 3 phase supply, should you get a three-phase or single-phase inverter?
3 phase inverters start at about 5kW so if you want an inverter smaller than 5kW you are looking at single-phase.
If you want a system with an inverter larger than 5kW then your local Electricity Network may insist that you use more than one phase. The best way to do this is to use a 3 phase inverter.
If you want a solar system with a total inverter capacity larger than 15kW (5kw per phase) then the relevant Australian Standard (AS.1:) says you must balance the phases. The easiest way to do that is simply to use a 3 phase inverter.
If you have skinny wires from your meter to the grid, then you may have a problem with high voltage drops. If the voltage drop is too high you may not be able to install solar. A 3 phase inverter spreads the power across 3 phases, so makes the voltage drop on each wire 3x smaller. So if you have an issue with voltage drop &#; a 3 phase inverter is a good solution.
Otherwise, if you are installing a system and have the choice of one single-phase meter, or one 3 phase meter, the choice is yours. The advantage of a 3 phase meter is that it is a more robust system (lower voltage drops, phases balanced). The disadvantage is that is about $600 more for a 3 phase meter. I&#;d pay the extra personally.
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