24 volt to 12 volt converter
Looking to run 600 watts of solar to my 40 amp MTTP controller at 36 volts. I have 4-6 volt batteries. So I need to get my 24 volt battery bank down to 12 volts to my Magnum 2012 inverter charger. ...
Forum Discussion
tdevery wrote:
Thanks. I read that the MPPT controller would just exclude the extra amps. But was not sure and did not want to wreck it. My panels will be flat on the RV roof. So I will be producing less amps. Presently have 2 100 amp Renogy panel's on a stand. At the outerbanks this summer i was getting 12.5 amps. Panels wirrd for 24 volts.
What can wreck the controller instantly--no second chance-- is going over its Voc limit. Say you have four panels with Voc of 36v. Two in series is 72 Voc and the controller's limit might be under or over that. If the limit is 100Voc you are good at 72. Some days your sunlight will get you more than rated Voc so you need some margin.
Put the other two panels in series for 72 Voc and parallel the two pairs to stay at 72.
If the controller's limit is 60 Voc, then you must put all the 36s in parallel to stay at 36, under that 60 and with some margin.
