Reverse Pv Polarity; Batteries Are Undercharged - Victron energy SmartSolar MPPT 100/30 Manual

VictronConnect app error #33 indication on the status screen and history screen.

8.5.6. Reverse PV polarity

When the solar charger is installed within the published specifications, internal protection guards the PV input against reverse PV
polarity, and no error is displayed in such cases.
To identify reverse PV voltage, watch for these indicators:
• Absence of battery charging with the charge current remaining at zero.
• Excessive heat generated by the solar charger.
• PV voltage reading zero or close to zero.
To verify, use a multimeter to ensure that the positive PV cable is correctly connected to the positive PV terminal and the negative
cable is connected to the negative PV terminal.
WARNING: Certain solar charger models may have PV voltages up to 250Vdc. Voltages exceeding 50V are
generally considered dangerous. Only a qualified technician should handle dangerous voltages.

8.6. Batteries are undercharged

This chapter addresses the issue of undercharged batteries. It explores possible reasons why the solar charger might not be
adequately charging the batteries and provides steps to check or resolve the situation.
Some signs of undercharged batteries include:
• Batteries taking too long to charge.
• Batteries not being fully charged by the end of the day.
• Charge current is less than expected.
Several factors can cause this, such as:
• Insufficient solar supply. Refer to the
• High DC load. Refer to the DC load too high [49]
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MPPT solar charger manual
Insufficient solar supply [49] subchapter.
subchapter.
Troubleshooting