Reverse Battery Polarity; Battery Settings Too Low - Victron energy SmartSolar MPPT 150/60 Manual

Battery voltage check
In case of a voltage difference, investigate the reason behind it by tracing the path from the solar charger to the
battery to identify the cause.
• Check and confirm that all cabling is accurately connected and that there are no wiring errors.
• Inspect the cable connections for tightness while keeping the maximum torque levels in mind.
Step 4
• Verify the correct crimping of all cable lugs or terminals.
• Check the fuses and circuit breakers.
Should you come across a blown fuse, make sure to check the correct wiring of the battery
polarity before replacing it. Refer to the

8.5.3. Reverse battery polarity

Reverse polarity occurs when the positive and negative battery cables are accidentally swapped. This means the negative battery
terminal connects to the positive solar charger terminal, and the positive battery terminal connects to the negative solar charger
terminal.
Be aware that a red or positively labelled cable may not necessarily indicate the cable is positive. A wiring or
labelling mistake during the solar charger installation is possible.
Always double-check the battery polarity before reconnecting the battery wires to the solar charger.
Reverse battery polarity can potentially damage the solar charger, causing its internal fuse to blow for fail-safe protection. This
fuse might blow before the external fuse in the battery cable. However, please note that the internal fuse is situated in a
non-serviceable area, and it cannot be replaced or repaired. If this happens, the solar charger should be considered faulty.
The solar charger is not protected against reverse battery polarity, and any resulting damage is not covered under warranty.

8.5.4. Battery settings too low

If the solar charger's charge voltage and current are well below the manufacturer's recommended levels, the battery charging
process may become inadequate or excessively slow. Incorrect configuration can be a contributing factor, including:
• Setting the "Battery voltage" parameter too low.
• Setting the ''Absorption voltage" and "Float voltage" parameters too low.
• Setting the "Max charge current" parameter to zero or an excessively low value.
Page 51
MPPT solar charger manual
Examples of correct and incorrect (reverse) battery polarity.
Reverse battery polarity [51] chapter.
Troubleshooting