Originally posted by

**Tobym**View PostWith PWM

**Input Current = Output Current.**If you were to use 4 of those those panels in parallel on a 12 volt battery would deliver a max charge current of 4 x 4.86 amps =

**19.44 amps**or just 19.44 amps x 12 volts = 233 watt out of 680 watt input.

With MPPT

**Output Current = Panel Wattage**/ Battery Voltage. So if you used those same 4 panels on a 12 volt battery (makes no difference if they are series or parallel) will deliver [4 x 170 watts] / 12 volts =

**56 amps**.

Is 56 = 19.44 ?

You had better know what you are doing.

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