I've got a new EPEver 3210AN, 30 A MPPT solar charge controller, and single 320 W 40 V solar panel connected about 4 feet (1 meter) away with 12 AWG wire. It's a very simple van setup. My battery is a single 12 V, 115 Ah deep cycle battery.
(The oversized panel is basically to allow use of fans, TV and charging during daylight hours, and also to get more power on cloudy days and in shade -- not so much for charging a battery up.)
In morning cloudy skies in Florida in October at 10am I was reading:
- PV in: 30 V, 6.5 A, 0.6 kWh
- Battery: 13 V
How many watts is my solar panel producing at the above reading? Is it (6.5 A x 30 V = 195 W) or (6.5 A x 13 V = 84.5 W)? How is 0.6 kWh (600 Wh) possible or true?