10
4. Troubleshooting
Problem
Possible cause
Solution
Charger does not
function
Reversed PV connection
Connect PV correctly
Reverse battery
connection
Non replacable fuse
blown.
Return to VE for repair
The battery is not fully
charged
A bad battery connection
Check battery
connection
Cable losses too high
Use cables with larger
cross section
Large ambient
temperature difference
between charger and
battery (T
ambient_c hrg
>
T
ambient_batt
)
Make sure that
ambient conditions
are equal for charger
and battery
Only for a 24V system:
wrong system voltage
chosen (12V instead of
24V) by the charge
controller
Disconnect PV and
battery, after making
sure that the battery
voltage is at least
>19V, reconnect
properly
(reconnect battery
first)
The battery is being
overcharged
A battery cell is defect
Replace battery
Large ambient
temperature difference
between charger and
battery (T
ambient_c hrg
<
T
ambient_batt
)
Make sure that
ambient conditions
are equal for charger
and battery
