Hey everyone! I'm considering getting a solar charge controller for my off-grid camper setup, and I'm a bit unsure about which one to choose. I'm looking at either the Renogy Rover Li 40 Amp MPPT or the Litime 30A MPPT to charge a 12V, 280Ah lithium battery. My camper has 30A-rated roof ports and I'm using 10 AWG wire, which limits my current and solar input.
I have three 200W 12V solar panels and I plan to wire them in series, keeping in mind the 30A limit on the roof ports. My confusion is around the MPPT specifications—specifically, I'm not clear on how they handle the higher voltage from my series connection (36V) when charging a 12V battery. Can either of the controllers I'm looking at manage this, or do I need to consider a larger MPPT? Any insights would be really appreciated!
1 Answer
From what I've gathered, that 450W limit for 12V charging typically refers to the total wattage that can be safely handled by the battery type you're using. The key here is that 12V in that spec means your battery, not the panels. When you wire your three panels in series, you'll hit 36V, which is higher than 12V—a good approach to optimize performance and stay within that 30A limit. You'll want to confirm the specs on the MPPT you’re considering to make sure it can handle the input voltage from your setup!
Thanks, SolarSavant99! So if I'm wiring them for a higher voltage, that won't cause any issues as long as my MPPT can handle it? Got it!