electric advice please

[deep denial]

My 100w solar panel isn't charging, and I was told that it was now u/s and needed replacing - it is quite old. However on testing it shows 12.8v coming from the panel, but 0 v coming from the charge controller. Does this mean that it is the controller which is at fault, or could it be that the charge from the panel is too weak to get through the controller? Thanks in advance

 

[rotrax]

The voltage from the panel should be much higher.

Each of my 200W rigid panels produces 23-24V in modest sun.

 

[deep denial]

The voltage from the panel should be much higher.

Each of my 200W rigid panels produces 23-24V in modest sun.

Doesn't that mean that you have 24v panels?

 

[Bilgediver]

My 100w solar panel isn't charging, and I was told that it was now u/s and needed replacing - it is quite old. However on testing it shows 12.8v coming from the panel, but 0 v coming from the charge controller. Does this mean that it is the controller which is at fault, or could it be that the charge from the panel is too weak to get through the controller? Thanks in advance

Might be able to couple this aged panel up to a car cigar plug/usb adaptor and us it to charge devices .

 

[Graham376]

My 100w solar panel isn't charging, and I was told that it was now u/s and needed replacing - it is quite old. However on testing it shows 12.8v coming from the panel, but 0 v coming from the charge controller. Does this mean that it is the controller which is at fault, or could it be that the charge from the panel is too weak to get through the controller? Thanks in advance

Are you measuring panel voltage with the panel disconnected from the controller? If so, 12v panel should be giving 20v+ in sunlight.

 

[VicS]

My 100w solar panel isn't charging, and I was told that it was now u/s and needed replacing - it is quite old. However on testing it shows 12.8v coming from the panel, but 0 v coming from the charge controller. Does this mean that it is the controller which is at fault, or could it be that the charge from the panel is too weak to get through the controller? Thanks in advance

In bright sun light the open circuit ( that is not connected to anything ) voltage of a "12 volt" panel should be in the low 20s (21, 22 or 23 ........something like that )

If you connect your multimeter, set to its 10amp range, directly across the panel you should see something around 5 amps or a little more , in full sun.