Batteries Are Overcharged; Battery Voltage Setting Too High; Battery Charge Voltage Settings Too High; Battery Unable To Deal With Equalisation - Victron energy SmartSolar MPPT 100/30 Manual

Note that this chapter does not apply if the solar charger is connected to a VE.Smart Network with a battery
temperature measurement or is equipped with a temperature sensor.
At the beginning of the day, as soon as power is generated by the solar array, the solar charger will measure the ambient
temperature and use it to temperature-compensate the charge voltage.
During the float stage, the solar charger will re-measure the ambient temperature and adjust the voltages accordingly.
Large differences in ambient temperature between the solar charger and the battery can lead to improper charging voltages for
the battery.
For instance, if the solar charger is placed near a sunlit window while the batteries are located on a cold concrete floor in the
shade, this temperature discrepancy can affect the charging process.
To ensure optimal performance, always ensure that the ambient conditions are equal for both the solar charger and the battery.

8.7. Batteries are overcharged

WARNING: Overcharging batteries can be extremely dangerous! There is a significant risk of battery
explosion, fire, or acid leakage. To prevent accidents, do not smoke, create sparks, or have open flames
in the same room where the batteries are located.
Overcharging batteries can lead to severe battery damage and may be caused by the following factors:
• Incorrect charge voltage settings. Refer to the
• Battery voltage setting too high. Refer to the
• Applying equalisation while the battery is not suitable for it. Refer to the
subchapter.
• The battery is too small, old, has been mistreated in the past or is faulty. Refer to the
subchapter.

8.7.1. Battery voltage setting too high

If the "battery voltage" setting in the VictronConnect app is configured to a voltage higher than the actual system voltage, it will
result in overcharging the battery.
The solar charger automatically detects the battery voltage on the first install, and afterwards, the self-detection is disabled.
However, if the solar charger is moved from a 24V system to a 12V system, it may not recognise the system change.
Consequently, it will continue charging with 24V battery charge voltages, while the connected battery is a 12V battery, leading to
overcharging of the 12V battery.
To verify the "battery voltage" setting, use the VictronConnect app or a connected display. If the setting is incorrect, make sure to
adjust it to the correct battery voltage.

8.7.2. Battery charge voltage settings too high

Batteries can be overcharged if the battery charge voltages are set too high.
Verify that all the battery charge voltages (absorption and float) are correctly configured to match the recommended voltages
specified in the battery manufacturer's documentation.

8.7.3. Battery unable to deal with equalisation

When equalisation occurs, the battery charge voltage will be considerably high, and if the battery is unsuitable for equalisation, it
may be overcharged.
It's essential to note that not all batteries can handle equalisation voltages. Check with the battery manufacturer to determine if
the battery you are using requires a periodic equalising charge.
In general, sealed batteries and lithium batteries do not require equalisation and should not undergo the equalisation process.
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Battery charge voltage settings too high [51]
Battery voltage setting too high [51]
Battery unable to deal with equalisation [51]
subchapter.
subchapter.
Battery old, faulty or undersized [52]
Troubleshooting