Batteries Are Not Charged; Reverse Battery Polarity - Victron energy SmartSolar MPPT 100/30 Manual

Battery voltage Operational state
Powered, but not
Correct Voltage
charging

9.2. Batteries are not charged

This chapter lists all possible reasons why the solar charger does not charge the batteries, and the steps you can take to remedy
the situation.
There are a number of reasons why the solar charger might not charge the batteries.
For example:
• Issues with the battery, PV panels or system wiring.
• Incorrect settings.
• The solar charger is externally controlled.
• Natural battery behaviour.
In some of these cases the VictronConnect App will show, at the bottom of the status screen, a clickable link with the text "why is
the charger off". If the link is clicked, an explanation will appear as to why the charger is off.

9.2.1. Reverse battery polarity

Reverse polarity is when the positive and the negative battery cable have been accidentally swapped. The battery negative has
been connected to the positive solar charger terminal and the battery positive has been connected to the negative solar charger
terminal.
Be aware that a red cable or positive labelled cable might not necessarily mean that the cable is indeed a
positive cable. A wiring or labelling mistake could have been made during installation of the solar charger.
Page 38
MPPT solar charger manual
Action to take
Connect PV supply and check if battery charging starts. If charging does
not start, see chapter: " Batteries are not charged".
VictronConnect – link to "why is the charger off"
Examples of correct and incorrect (reverse) battery polarity
Troubleshooting and Support