Solar panel voltage and current

[zawminoo]

Hi everybody,
I have a solar panel, There have any no data.
I know it is 250W solar panel. I can measure Voc and Isc.
I would like to know maximum power voltage (Vmp) and maximum power current ( Imp).
Please help me.

 

[BradtheRad]

Typical max V from a PV panel is 20 to 23 V.

Max Amperes is at 0V. But that makes zero W. So maximum power is achieved at some middle range. I think you'll find it's at 12 or 13V.

The reason is because PV panels are often used to charge 12V batteries. Manufacturers build panels by stringing some quantity of PV cells together. The goal is to push maximum Amperes into the 12V battery.

This is my interpretation after I did tests on my PV panels (64W) and batteries.

Therefore you can expect your 250W panel to push about 20A into a 12V battery, on a clear day in southwest USA where sunlight is strongest.