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Oh there's tons of other cheaper options for a DC-DC @Sverige . I was just using the Rego as an example since ei keep seeing adds for it. @sunshine_eggo I guess that why it's really just smarter to switch the entire bank of batteries out. I really didn't want to try and sell 2 130lbs battery's...

Haha those are all accurate. But I feel like I was clear so I would say it's options 2 and 3. I didn't keep track of the threads I read over the months. I've just read mixed things about using the DC-DC for this purpose. So ignore I said that. But ya. That uncertainty is why I thought I would...

I contacted renogy directly and they strongly adviced against using a DC-DC to introduce different battery types I to the same system

I know there are other threads about mixed battery types and you cannot just throw diff battery types in the same bank. But I'm curious why it's so strongly advice against using a DC-DC charger to mix the battery types? Like the Renogy Rego or similar. I would have the solar charging one...

Ya that was first thing in the morning, after being used through the night. I have the renogy rover 40amp. BButseems you were right and that I shouldn't be worrying about the percentage. The voltage has been going up to 12.9 which to my understanding is when it gets a full charge.

Got ya. That makes sense. I slightly knew that part but thought the battery percentage would be a bit more accurate. But I did go out to my office and the switched had switched to solar power so that means the voltage got pretty high, which indicates the batteries were charged up. So I'll just...

Ahh. So you're saying I shouldn't focus on the battery percentage as much as the voltage since the percentage is way less accurate? Cause it can reduce the percentage just by having a load on the battery, even though the battery actual percentage isnt as affected??

I'm looking at the charge controller mostly, to check the batter charge. But I also have a switcher that checks the voltage and a shunt that checks the battery charge. I have renogy agm batteries. 2 200Ah Ya 2s3p. I'm a totally newbie FYI

Hey all. I've had an off-grid office solarsystem that works great typically, undersized but works great. I have the 40arenogy Rover charge controller. With 4 100w solar panels that are 2 in parallel and 2 in series. I've always got about 40~ volts and 4-6amps. Recently I got a pair of extra...

Thanks for the knowledge drop. I'll check these out. I'm happy with the choices I made for my system. My initial plan was to start small and scale up since my initial plan wasn't to have all of my 3d printers or laser cutter in my office. Just went through your amazon links and looks like I...

Good to know. Thank you

Man. This is actually doing considerably better then before. I also ended up buying an automatic power transfer switch that I'll install this weekend. That way I can run off the main house without issue, if anything ever happens or we get a crazy amount of rain/fog for a week straight again

Alright. It's still early in the day. It's noon right now. But I'm pulling about 12 amps and 32v

Sweet. I switched the wiring to 2s2p after work today so we will see through the day. I'll report back what happened.

@Hedges you still recommend 2s2p??

Just looking right now. Volts says 14.6 (it's early morning hear and indirect sun. Current amps is 0.34a

So question about adding more batteries. Is there a safe way to mix lithium in? Run them on a different charge controller? Or don't even bother?

Ya. On the charge controller it says there's 18v input. I assumed that was what it was reading from the panels at real time. But now I'm questioning if that's what it is, or if it's the max option for my config

Ya. That cable is 10 awg. Not sure I follow the rest of what you said though .... At you saying to put each pair of panels into its own series. And then parallel the two series??

Ok here is my crude sketch.

And that's a true fact. I need more beer in there

What's 0.4C?

Ya. I bought them in pairs. The first pair wasn't sold anymore so I bought the same 12v 100w with the second pair, thinking that's what mattered to have match. What's 2s2p. The cable that goes from the charge controller to the panels is 20 ft. And I connected the panels with splitters. So...

The fridge actually hasn't.cause any issues. But I agree I need a bigger system, I just want to make sure I'm being the most efficient before adding panels. I only have so much real estate for panels. So just looking for efficiency tips for my setup.

For sure! Not trying to be fog proof. Just making sure I'm optimal before buying more panels and batteries. And if I end up swapping batteries, then I was going to weigh out switching to lithium. I don't believe there's a way to run agm and lithium together

Wind https://www.amazon.com/dp/B07MDB2KJG/ref=cm_sw_r_apan_glt_fabc_7XCRTVASRXSECHATJGRW?_encoding=UTF8&psc=1 Panels https://www.amazon.com/dp/B06XPZD6G5/ref=cm_sw_r_apan_glt_fabc_XGNWRNCQRZP52QG179FG?_encoding=UTF8&psc=1...

So I built a backyard office. I'm a software engineer and maker. I have 3d printers, laser cutter, multiple computer screens, a mini bar fridge and a few small electronics. I have a 12v system. 4* 100w 12v panels in parallel 400w 12v wind generator (not connected yet) A 40a 12v/24v charge...