We are testing 2ea of Blue Solar MPPT 100/50.
One works, but the other becomes “charger or Panel over-voltage” fault mode when connected.
I thought the product was broken, so I bought a new product and tested it, but it’s the same.
PV output voltage is measured 24V and battery is measured 24V.
Although turning Rotary switches 1 to 7 are in the same fault mode.
I understand that the battery voltage is automatically recognized.
What point do you think I need to check?
Please give me some advice.
"One works, but the other becomes “charger or Panel over-voltage” fault mode when connected."
Ok, you have checked the led diagnostics, good for you.
"PV output voltage is measured 24V and battery is measured 24V. "
This would indicate a high resistance joint/connection between your mppt and solar array.
Measure the voltage (loss) across every connection/joint/fuse/breaker, between the mppt and array. Multimeter probes are pointy for a reason ;).
Thanks for your opinion.
One important thing is that the first unit works well without a Fault message.
The other one shows the same fault mode “charger or panel over voltage”.
We checked for abnormalities in what you said, such as connection/joint/fuse/breaker, between the MPPT and array.
The problem with this is that both should be in Fault mode, but one works well without a Fault message.
The other one shows the same fault mode “charger or panel over voltage”.
Is there anything else to check for MPPT?
