Hey everyone! I'm in the process of setting up my solar system for an off-grid cabin, and I need some advice on the wiring. I'm considering whether to bury 10AWG copper wire from the battery, or if I should use a 10AWG pair of solar cables instead. I'm planning to protect them with thick conduit since I've got critters around here in Atlantic Canada that could damage them.
Another thing I'm wondering about is how to configure the panels for optimal performance over a distance of about 150 feet. Should I wire them in series for more voltage or in parallel for more amps? I've got a maximum output in mind of around 25 volts and 3 amps, but I'm concerned about potential losses. My system is pretty basic, using a 600w inverter with four DOKIO 100w flexible panels, a 40w MBBT, and a 12.8v 100aH battery. I'm looking to power a few small devices like a water pump and lights, and I want to maximize efficiency while minimizing losses. Is there an ideal wiring setup that would help reduce voltage drop, or would it end up being the same no matter what since I'm using 10AWG throughout? Also, should I consider placing the panels closer to the cabin, or would it be better to find a spot with more sunlight even if it means adding some distance? Any advice would be greatly appreciated!
1 Answer
For minimizing power loss, you definitely want to maximize the voltage, so running your panels in series is the way to go. Higher voltages mean lower current, which reduces energy loss over distance. It's exactly why those big power lines operate at high voltages! Just keep in mind the longevity of your flexible panels; if you find you need to replace them later, rigid panels often have better durability and might turn out to be more cost-effective in the long run.
Thanks for clarifying that! I wasn't entirely sure about the differences between the flexible and rigid panels, but your advice is super helpful. So to confirm, series is best for my situation, right?