What law on batteries

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 ..
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 ..

Comments
The batteries are charging, Not sure why you would use the load tester to measure the voltage while charging?
- Assorted other systems, pieces and to many panels in the closet to not do more projects.