I've got two GC2 6V 190 amp batteries connected in series for my RV setup. I'm wondering if a 40 amp MPPT solar charger along with two 255 watt solar panels will be enough to charge them effectively. Is it as straightforward as connecting everything in series, or do I need additional components or considerations?
2 Answers
Generally, a good rule of thumb is to have 600 watts of solar power for every 200 amp-hours of battery capacity. You're likely on the right track with your setup! Your 40 amp MPPT charger should work well, but make sure to check its maximum voltage input. For instance, I use a model that can only handle up to 150V, and with my 56V panels, I can only connect two in series. Just be cautious about exceeding the voltage limits!
I’m looking at the Rover Li 40 Amp MPPT solar charge controller. Its specs say the solar input range is between 15-100VDC. With my 255W panels, which have an open circuit voltage around 37V, that should give me about 74V, so I should be good, right?
When you connect two 6V batteries in series, they function just like a single 12V battery, so your setup should work well! Just make sure everything is compatible and safe. Happy solar charging!
Thanks for the insight! Right now, I have to run my generator to charge, but it's super slow at only 1.1 amps. Instead of replacing the charger, I want to try going solar first. Besides the charger and panels, will I need anything else like a fuse or extra wiring?