Troubleshooting - Victron energy SmartSolar MPPT 150/85 Series Manual

4. Troubleshooting

Problem
Charger does not
function
The battery is not fully
charged
The battery is being
overcharged
Possible cause
Reversed PV connection
Reverse battery
connection
A bad battery connection
Cable losses too high
Large ambient
temperature difference
between charger and
battery (T >
ambient_chrg
T )
ambient_batt
Only for a 24V or 48V
system: wrong system
voltage chosen (e.g. 12V
instead of 24V) by the
charge controller
A battery cell is defect
Large ambient
temperature difference
between charger and
battery (T <
ambient_chrg
T )
ambient_batt
Solution
Connect PV correctly
Non replacable fuse
blown.
Return to VE for repair
Check battery
connection
Use cables with larger
cross section
Make sure that
ambient conditions
are equal for charger
and battery
Disconnect PV and
battery, reconnect
battery first. Make
sure that the battery
voltage is higher than
17.5V (24V system) or
35V (48V system).
Replace battery
Make sure that
ambient conditions
are equal for charger
and battery
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