20W solar...need controller?
I have acquired a 20W solar panel that shows 20vdc when not connected to anything (in full sun). When hooked up to a 12v battery, I have seen it as high as 17vdc. I'm wondering if I can get away wit...
Forum Discussion
Glad to see some discussions here...
I am installing a new battery bank which came with a 10WATT SOLAR panel one end of the slide off top lid. I am going to add a second identical 10 WATT Solar panel on the other end.
Was wanting to use the two 10WATT solar panels for trickle charge of the two 6VDC GC2 series battery groups when sitting in the high sun... This battery bank will be sitting on my trailer tongue area...
I too see 16-17 VDC output on the solar panels with nothing hooked up. When I hookup to the batteries this drops back to charge state of the batteries. (12.6-7 VDC...)
Never thought about it may need a regulator on it... Before I started working on my new battery bank I was sitting the one solar panel in the windshield dash area of my truck and had it plugged into an always hot 12V connector. It sit this way for a couple of years and never did any harm to my truck battery. I think the output is around 200 milliamps...
Google image
Roy Ken
I am installing a new battery bank which came with a 10WATT SOLAR panel one end of the slide off top lid. I am going to add a second identical 10 WATT Solar panel on the other end.
Was wanting to use the two 10WATT solar panels for trickle charge of the two 6VDC GC2 series battery groups when sitting in the high sun... This battery bank will be sitting on my trailer tongue area...
I too see 16-17 VDC output on the solar panels with nothing hooked up. When I hookup to the batteries this drops back to charge state of the batteries. (12.6-7 VDC...)
Never thought about it may need a regulator on it... Before I started working on my new battery bank I was sitting the one solar panel in the windshield dash area of my truck and had it plugged into an always hot 12V connector. It sit this way for a couple of years and never did any harm to my truck battery. I think the output is around 200 milliamps...
Google image
Roy Ken
