My current main system is charging off an 1.2kw (4 pnls) array in 2s2p config, epever 4210n charge controller 100v / 40 amp powering 6 12v 100ah flooded lead acid marine batteries wired 24v and feeding into a 3500/7000w inverter
This system charges at 40amps 24v into 300ahr 24v battery bank. In its current set up I have all the power I need during day time (saws, compressor, laptop) and the batteries are actually filled pretty quickly, by 10 am they are back to float, 7 years on this system and I only take the top 20% off at night 24.8v or so when I shut down at night.
However I am not currently running items that require power 24/7 and that’s about to change, wanting to add a frig, my plan is to add a few more batteries to the sting to increase my night time power availability. ( please don’t go into mixing new and old, I am well aware)
Now onto the question
40a charger, 300ah battery’s increasing to 500ah of total batteries
Will the charger keep up?
I know there is a rule of thumb for the charger capacity vs the string capacity, that’s what I’m looking for, seen it referenced, but have looked for days and can’t seem to find the rule or formula
Trying to figure out if batteries are enough or if I need to get a 2nd charge controller and a couple of pnls and put both in 3s, 4s overdrives the pv 100v max and wouldn’t increase the 40a limit on the controller anyway,
Thanks in advance
This system charges at 40amps 24v into 300ahr 24v battery bank. In its current set up I have all the power I need during day time (saws, compressor, laptop) and the batteries are actually filled pretty quickly, by 10 am they are back to float, 7 years on this system and I only take the top 20% off at night 24.8v or so when I shut down at night.
However I am not currently running items that require power 24/7 and that’s about to change, wanting to add a frig, my plan is to add a few more batteries to the sting to increase my night time power availability. ( please don’t go into mixing new and old, I am well aware)
Now onto the question
40a charger, 300ah battery’s increasing to 500ah of total batteries
Will the charger keep up?
I know there is a rule of thumb for the charger capacity vs the string capacity, that’s what I’m looking for, seen it referenced, but have looked for days and can’t seem to find the rule or formula
Trying to figure out if batteries are enough or if I need to get a 2nd charge controller and a couple of pnls and put both in 3s, 4s overdrives the pv 100v max and wouldn’t increase the 40a limit on the controller anyway,
Thanks in advance