Trying to setup a small panel to maintain my 4wd dual batteries using a victron mppt 75/15 which connects directly to my starter batt. The isolator links both batts when there is a charger connected to starter batt terminals.
I first tried a small 40w (21voc, 17max volts) panel.
but the cc was stuck in bulk and would never go up to absorption even after 2hours in sunlight. I tried this when both batteries were linked and at 12.7v and at another time 13v in morning, the previous day i charged them using the AC-DC charger.
However the cc did go into absorption with a single battety within a minute.
Not sure what i should do? What size/type of panal should i get?
Also my CC wont work unless PV V is 5V+ battV. There after only 1V+ is needed. I would like to know why they do this?
thanks
I first tried a small 40w (21voc, 17max volts) panel.
but the cc was stuck in bulk and would never go up to absorption even after 2hours in sunlight. I tried this when both batteries were linked and at 12.7v and at another time 13v in morning, the previous day i charged them using the AC-DC charger.
However the cc did go into absorption with a single battety within a minute.
Not sure what i should do? What size/type of panal should i get?
Also my CC wont work unless PV V is 5V+ battV. There after only 1V+ is needed. I would like to know why they do this?
thanks
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