Solar Panel Open Circuit Voltage

[KAM]

I just bought a 20W semi flexible solar panel to test. The information on the back of the panel says VOC 21.24V. I am measuring 44V have I been sent a 24v panel instead of a 12V.

 

[Sandyman]

Cant be sure but my panels are 24v and the open circuit voltage is around 44v. Clagg it up to a load & measure the voltage again.

 

[VicS]

I just bought a 20W semi flexible solar panel to test. The information on the back of the panel says VOC 21.24V. I am measuring 44V have I been sent a 24v panel instead of a 12V.

I would think so but be sure your meter is reading correctly!

If you are using a good MPPT regulator it may accept a 24 volt input.

 

[KAM]

Oops. Thanks for that it was on AC. The AC and DC symbols are easy to confuse on my meter.

 

[KAM]

Slightly underwhelmed by the output so far. 50mA typically it went up to 200mA today when the sun came out and pointing directly at it.

 

[VicS]

Slightly underwhelmed by the output so far. 50mA typically it went up to 200mA today when the sun came out and pointing directly at it.

In to a battery, a load equivalent to 20 watts, or the maximum when shorted by an ammeter

 

[wasifaliwasi]

Thank you for this post, It was a great read which was extremely helpful.

 

[theosam933]

Hello Everyone could you please tell me how can I connect 2 solar panels in parallel if they have different Open Circuit voltage ( e.g 22V and 14V)?

 

[KAM]

Its short circuit through an ammeter at the moment. I'll hook it up to the boat amp hours meter tomorrow and see what I get but could be a few weeks before the sun comes out again.