B
Brian Graham
- Jan 1, 1970
- 0
A friend was talking to an _expert_ on batteries yesterday. The understanding that I have based on his conversation - ever played telephone?? - is that the PV current should really be no less than 5% of the bank size. Ie, a 5 amp PV panel should be connected to no more than a 100ah battery bank. I believe this has something to do with internal battery resistance and the inability of lesser pv currents to actually charge the bank.
This means that a 150 Watt 5A pv panel, which in 7 hrs of sunshine could pull in 35ah daily, is unable to charge a battery larger than 100ah. Actually there's _some_ wiggle room so call it 200ah. ???????
Here's something else that comes to mind. The panel above is a 24V panel. So, it sounds like it could successfully charge four 6V 100ah cells connected in series (400ah total), but could not charge a single 24V 200ah bat (if there was one). Most Odd...
This bodes well for my 15Watt panel at my trailer 'charging' my 100ah battery.. :-(
I need some help to get a good handle on this.
This means that a 150 Watt 5A pv panel, which in 7 hrs of sunshine could pull in 35ah daily, is unable to charge a battery larger than 100ah. Actually there's _some_ wiggle room so call it 200ah. ???????
Here's something else that comes to mind. The panel above is a 24V panel. So, it sounds like it could successfully charge four 6V 100ah cells connected in series (400ah total), but could not charge a single 24V 200ah bat (if there was one). Most Odd...
This bodes well for my 15Watt panel at my trailer 'charging' my 100ah battery.. :-(
I need some help to get a good handle on this.