What law on batteries

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billybob9
billybob9 Registered Users Posts: 141 ✭✭
in Old Battery Tech Discussions #1
Watt's Law I=P/E
                 A=W/V
                 A=100W/15V
                 A=6.6A

So I took my Load Tester and clamped it onto my 12v battery ( Two 6 volts ) terminals. Then connected my 100W solar panel to the terminals. With full sun for 8 hours I EQ my batteries. 5 year old batteries why not give it a shot. Big time improvement ..
                   
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  • Photowhit
    Photowhit Solar Expert Posts: 6,003 ✭✭✭✭✭
    #2
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    Not sure what you think you are showing?

    The batteries are charging, Not sure why you would use the load tester to measure the voltage while charging?
    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Magnum MS4024, Prosine 1800(now backup) and Exeltech 1100(former backup...lol), 660 ah 24v Forklift battery(now 10 years old). Off grid for 20 years (if I include 8 months on a bicycle).
    - Assorted other systems, pieces and to many panels in the closet to not do more projects.
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  • billybob9
    billybob9 Registered Users Posts: 141 ✭✭
    #3
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    The charge of the batteries were 12.3v so the 15v shown on the load tester is the difference that I monitor as it's charging. With the caps off the batteries I can see the bubbles and tell which cells are worst.
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