Battery Full; The Charger Is Disabled; Pv Voltage Too Low - Victron energy BlueSolar MPPT 75/10 Manual

9.2.3. Battery full

Once the battery is full the solar charger will stop charging or will greatly reduce the charge current.
This is especially the case when at the same time the DC loads in the system are not consuming any power from the battery.
To find out what the state of charge (SoC) of the battery is, check the battery monitor (if present), or alternatively check what
charge stage the controller is in. Also observe that the solar cycle is (briefly) progressing trough these charge stages at the
beginning of the daily charge cycle:
• Bulk stage: 0-80% SoC
• Absorption stage 80-100% SoC
• Float or storage stage: 100% SoC.
Be aware that it can also be possible that the solar charger thinks the battery is full, while in reality the battery is not full. This can
occur when the charge voltages have been set too low, causing the solar charger to prematurely switch to the absorption or float
stage.

9.2.4. The charger is disabled

Check the VictronConnect App to make sure the charger has been enabled.

9.2.5. PV voltage too low

The solar charger will commence charging when the PV voltage is 5V higher than the battery voltage. Once charging has
commenced, the PV voltage must remain 1V higher than the battery voltage for charging to continue.
Check the PV and battery voltage
WARNING: Depending on the solar charge controller model, the PV voltage can be up to 250Vdc. Voltages
above 50V are generally considered to be dangerous. Check your local electrical safety regulations as to the
exact regulations. Dangerous voltages can only be handled by a qualified technician.
1. Use the VictronConnect App, a solar charger display or a GX device to check the battery voltage and PV voltage.
2. In case the above step is not possible, measure the battery and PV voltages at the solar charger terminals using a multi
meter instead.
3. Compare both voltages, the PV voltage needs to be 5V higher than the battery voltage for charging to commence.
Causes of zero or low PV voltage:
Not enough solar irradiance into the solar panels:
• Night.
• Cloud cover or bad weather.
Page 40
MPPT solar charger manual
VictronConnect charger enable/disable setting
V V
Troubleshooting and Support