The other two panels are also wired in series and connected to the same Y connector. We have two panels wired in series with the positive and negative wires going to Y connectors. That being said most likely 10 AWG Solar Cable will be sufficient for most situations. It would be best to consult a wire sizing chart or the store where you purchased your solar panels and charge controller to make sure you get the right-sized wire. The wiring you use between your solar panels and your charge controller will depend on how many amps your solar panels are producing and how far your panels are from your charge controller. It all worked out fine in the end and we are very satisfied with the system we have now. It would’ve been better to have purchased all the same size panels all at one time but since we are doing this debt-free we were not able to do that. When we tried to expand our system the 345W panels were discontinued, so we had to upgrade to the 365W ones. We have two different sized solar because we built our solar panel array as we went, as we had money. Our total solar output is 3570 watts under full sun. We have six of these panels running in a series-parallel configuration. We have four of these panels running in a series-parallel configuration. I would recommend purchasing these if you were planning on building a smaller system. There are some good deals on Amazon for smaller solar panels. The downside is you may have to pay freight shipping to receive them if you do not live near a local pick up point. However, you can get a much better deal on solar panels if you buy larger panels from an online retailer such as Unbound Solar on the West coast or The AltE Store on the East coast. This is because they are physically smaller in size and can be shipped through UPS. Many of the solar panels you will find on Amazon for example will be in the 100 to 200-watt range. Solar panels come in a wide variety of sizes, varying in the number of watts and voltage they produce. Keep reading for all the nitty-gritty details and a cool video tour. Wiring Components 24 VDC Wiring Components Here is a list of components we used for our off-grid solar system. Purchase a High-Resolution PDF of our Wiring Diagram to See all the Details – $9.99 I will also include some of the upgrades that we are planning to install within the next few months. Below I will break down our solar system which has been working well for us. What size panels should I get? How many batteries do I need? What is a charge controller? It can all seem so complicated. There are so many options when it comes to installing an off-grid solar system that it can be a little overwhelming.
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