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Jpnh avatar image

Smartsolar MPPT 75|15 solar panel not charging

We purchased a motorhome with a large roof solar panel and a SmartSolar charge controller installed. We only downloaded the app 2 days after we had the motorhome and ever since then no electricity has been coming in through the solar panel.

The app showed that it had been charging properly up until we downloaded the app. We tried uninstalling and reinstalling the app but nothing changed.

The app shows both the battery state as off and the load output state as off. The device is also constantly flashing blue. Does anyone know how we could get our solar panel to charge again? Any advice would be appreciated.

Solar Panel
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2 Answers
Jpnh avatar image

Thank you for the advice. I'll try to disconnect it and check to see if that helps.

At the moment the PV-voltage is 0.03.

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Matthias Lange - Service Team Döbeln DE avatar image

1. You have no PV-voltage. You should check this.

2. I'm not sure if the controller starts charging with such a low battery voltage. Maybe you should first try to charge the battery with a shore power.

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Thank you for the reply.

This is what the app shows when the battery is charged. So the load output state is on. Do you have any idea why there isn't any PV-voltage or how we could check it? Also do you think installing the app may have something to do with it not working?

Hi J,

Drag the screen down, then you can see the pv voltage.

You can try to disconnect the PV and measure the PV voltage with a multimeter.

On point 2. Victron MPPTs will start charging even if the battery voltage is 0V.