I'm having trouble getting my LiFePo4 batteries to charge, whether I'm using solar panels or shore power. My Renogy battery monitor initially showed the battery charge at 84%, but then it dropped to 64% while connected to shore power. Now that I'm camping with full shore power hookup, the monitor is showing the battery level has dropped to 41%. I'm not using any significant loads, so that shouldn't be happening.
I have my MPPT Rover set correctly for LiFePo4 batteries, and I'm not seeing any error codes. It shows that solar power is coming in, but the battery voltage remains steady at 13.8 volts with no load. My setup includes 2 x 100W Renogy panels, a 40amp Renogy MPPT, a Renogy shunt for battery monitoring, and a 2000W Bellitt inverter. I'm also using Renogy BT1 modules, but they've never powered up, even with trying two different units. I've checked all fuses and breakers. What am I missing? Any help would be greatly appreciated!
1 Answer
It sounds like you're on the right track, but it's odd that your batteries aren't charging at all. Do you have an AC to DC battery charger in your setup? It might not be explicitly listed, but I suspect you do. If the shunt is your main battery monitor, that’s good; it gives the most accurate readings of what's going in and out.
Have you tried isolating the batteries and using a dedicated lithium charger? That might help get them fully charged up before reconnecting everything. Just a thought!
Yes, I do have an AC to DC converter. I've checked all the fuses, and none seem to be blown. The shunt is showing no increase in battery percentage, just continuous depletion. It's weird that I'm not seeing any charging, even when on shore power.