Under performing LiPo
onebad Registered Users Posts: 12 ✭✭
I have two 100AH lithium batteries and two 100W solar panels and a 60amp DC to DC charger, all Renogy. The system works but seems to be under performing. On sunny days the batteries will charge up to 13.2 V but if I moved into shade within minutes the voltage drop to 12.8 even if I was in the sun for hours. Further, if I drive and run the charger (I put a switch in front of the charger so I can control if and when it runs) the batteries will get up to 14.2 but when I turn off the charger within 10 minutes the voltage will drop to 12.8. I have a fridge/freezer that is the biggest draw on my system but that shouldn’t cause such a drastic drop in voltage, besides I often turn my fridge off at night and I still have to start my engine/charger to keep the batteries from draining. I sent one of my batteries to Renogy and they said it tested and held a 14.4 charge. I haven’t sent them the other one because I’m laid off and if it tests good it will cost me $60 to have it sent back. I see people on YouTube who’s battery bank sits at 13.7 or higher, why won’t my battery bank hold that level of charge? Thank you.
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