Wrong Temperature Compensation Setting; Batteries Are Overcharged; Battery Charge Voltages Too High; Battery Unable To Deal With Equalization - Victron energy Multi RS Solar 48/6000/100-450/100 Manual

Battery cable voltage drop check
This check must be performed while the charger is charging with a full current. Typically best done in the morning. Use the
VictronConnect app to check the output current.
1. Measure the voltage on the battery terminals of the solar charger using the VictronConnect app or a multimeter.
2. Measure the battery voltage on the terminals of the battery using a multimeter.
3. Compare the two voltages to see if there is a voltage difference.

6.6.4. Wrong temperature compensation setting

If the temperature compensation coefficient is set incorrectly, the batteries can be undercharged or be overcharged. The
temperature compensation can be set via VictronConnect or via a display.
To find out the correct temperature compensation coefficient setting for your battery, refer to the battery documentation. When in
doubt use the default value of -64.80mV/°C for lead acid batteries and disable the temperature compensation setting for lithium
batteries.

6.7. Batteries are overcharged

Batteries that are being overcharged are very dangerous! There is a risk of battery explosion, fire or acid
leakage. Do not smoke, create sparks or have open flames in the same room as where the batteries are
located.
Overcharging batteries will cause battery damage and can be caused by:
• Incorrect charge voltage settings.
• Applying equalisation while the battery is not suitable for equalisation.
• High current and undersized batteries.
• Battery faults.
• Too high current, while the battery is not accepting charge anymore because of aging or prior mistreatment.

6.7.1. Battery charge voltages too high

If the battery charge voltages are set too high this will cause the batteries to overcharge.
Check if all the battery charge voltages (absorption and float) are set correctly.
The charge voltages have to match the recommended voltages as stated in the battery manufacturers documentation.

6.7.2. Battery unable to deal with equalization

During equalization, the battery charge voltage will be quite high and if the battery is unsuitable to be equalized, the battery will be
overcharged.
Not all batteries can be charged with equalization voltages. Check with the battery manufacturer if the battery you are using
needs a periodic equalizing charge.
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Multi RS Solar
Troubleshooting Guide - MPPT