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There is a lot of info on sizing a circuit breaker per amperage. It seems the consensus is that the breaker amperage rating should be about 1.25 times the conductor sizing. But I can’t find anything telling me where the voltage rating of circuit breakers comes in. Also, there don’t seem to be a...

Yes, you’re right of course. The wire sizing calculator I used specifically said it was for sizing just one wire but I should have put in double the length. The inverter manual doesn’t recommend a wire size strangely enough.

Thank you! You have provided a lot of good feedback. I’ll look more into breaker sizing and pick up a couple of those. interestingly enough, I fired up my system (with only one pv panel connected just to test it out) for a few minutes and used a clamp meter to see the amperage going through...

I've been loving learning about off-grid PV system design, haven't been this interested in a hobby in a long time! The goal of this system is to learn about electrical systems and to hopefully have a functioning source of power to run a refrigerator/freezer in the case of an extended grid power...

Yeah, I'm not sure why it is such a large number. It is a subzero fridge/freezer so maybe the fancy ones like that take more power. I tool the yearly KW/hr rating from the manufacturer so it probably pretty close.

Thanks for the response. I agree that the 5 days without sun is very unlikely, especially here in Phoenix area. I will probably reduce that to 1 day. I can't really afford more anyway and don't want to go too crazy on my first system.

So I have been watching lot's of Will's videos and they are super helpful to a beginner like me. I also found a site called PVeducation.com which did a good job of spelling out the process of sizing your PV and batteries. I attached the image below of my calculations. I am a complete beginner so...