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I live in the south of England on the coast where -5 Deg C (23 Deg F) would be panic headlines in the press. I used the calculator and went to -10 Deg C (14 Deg F) as advised on the safe side and it said a 24VoC panel would be 26.2v. I tried a 28Voc panel and it came back 30.6v and recommended...

It will be a different panel, just this on is a decent branded one that is super cheap. Do you mind explaining how the temp drops would increase the voltage higher than 30 volts please so I can learn. If the limit on the controller is 30 volts what voltage would be too close? Would a VoC of 28...

So I started with some solar for the campervan and now I am obsessed. Went and bought a Bluetti AC180 and figured out how to make expansion batteries from our ebikes (https://tinyurl.com/mrhfwc8z), I want to get a BWM X5 hybrid and put a server rack battery in the boot that feeds a powerbank...

Hi guys, new member here. Just upgrading the 12v system in my van, I have a 110ah lead acid with Ctec charger (none lithium one) I have bought a 100ah lithium battery and a Renogy 40amp DC to DC with mppt controller. It is the older model RBC40d1S heard some stories of this draining the...

Thanks for the reply, so what would be a good average below maximum? 10% 25%. Not knowing how much higher a voltage can go above it VoC makes it a guessing game with expensive electronics. With my lack of knowledge I would have blindly thought a 28 volt VoC would have been more than within...

Really appreciate that, so for playing it safe, 18 to 24 volt VoC would be better and at the top end I could have the small potential of eating the controller. 28 is a no go and the 30 idea was stupidity.

Thanks but the limitations of life come into play. This is upgrading an already existing system that I spent hundreds on already, I have bought my stuff secondhand or new and unboxed to try and kept the wife happy with my new project. The controller does DC to DC and mppt charging in one unit...

Ok I have been reading more and the idea of 2000w through the plug seems like it poses some issues around safety so I have scraped that idea and happy to stick to 1000w or less so similar to the EU balcony systems. Here are some pictures of what we have. South facing roof with clear...