Insufficient Alternator Power; Wrong Temperature Compensation Setting; Battery Charge Current Too Low; Batteries Are Overcharged - Victron energy Orion XS 12/12-50A Manual

5.2.6. Insufficient alternator power

Check if the Orion XS reaches the float charge stage. To investigate, look at the history tab in the VictronConnect app. The
histogram displays how long the batteries have been charged in the Bulk, Absorption and Float stages for the last 40 cycles. If
you click on one of the histogram columns, you will see a breakdown of the charge stages.
Use the charge times to see if the alternator power rating is properly sized for your requirements. A system which never reaches
the float stage could have the following issues:
• Not enough power during idling: The power output of an alternator can be reduced to ~50% during idling.
• Too much load
• Overheated alternator causing it to reduce power output

5.2.7. Wrong temperature compensation setting

If the temperature compensation coefficient is set incorrectly, it can result in undercharging or overcharging of the batteries. You
can adjust the temperature compensation setting through VictronConnect.
To determine the correct temperature compensation coefficient for your battery, consult the battery documentation. When in
doubt, you can use the default value of -16.20mV/°C for lead-acid batteries and disable the temperature compensation setting for
lithium batteries.

5.2.8. Battery charge current too low

Check the Input/Output current limit settings in the VictronConnect app.
If the Input/Output current limit has been set too low, it will take longer to charge the batteries.

5.3. 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
• Battery voltage setting too high
• High current and undersized batteries
• Battery faults
• Too high current, while the battery is not accepting charge anymore because of ageing or prior mistreatment

5.3.1. 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 manufacturer's documentation.

5.3.2. 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 your battery needs a periodic
equalizing charge.
Generally speaking, sealed batteries and lithium batteries cannot be equalized.
Page 29
Manual - Orion XS 12/12-50A DC-DC battery charger
Troubleshooting & Support