Controlled By An External Device; Battery Supply Issue - Victron energy SmartSolar MPPT 150/45 Manual

The "battery voltage" setting is listed at the top of the battery settings menu. Depending on controller model 12, 24, 36 or 48V can
be selected.
In case the VictronConnect App is not available and a display is used, refer to the display manual on how to check or change this
setting.

9.2.7. Controlled by an external device

The solar charger can be controlled by an external device. The external device can stop or reduce the charge current to the
battery.
There are different types of external control:
• Managed batteries or an inverter/charger with an external control system system can control the solar charger via a GX device.
The battery dictates if charging is allowed, and when charging is allowed, what charge voltage and currents are used. If
external control is active this will be displayed in the VictronConnect App and also on the GX device.
• The BMS of a managed battery can directly turn the charger on or off via a VE.Direct non-inverting remote on/off cable. This
cable is connected to the VE.Direct port. The BMS can turn the charger off via this cable.
If the charge settings are correctly set and if all battery cells are balanced, the BMS should never disallow charging. The BMS
will disallow charging when the cell voltage of one (or more) battery cells is too high or when the low temperature cut off is
enabled and the battery temperature has dropped below the temperature threshold.

9.2.8. Battery supply issue

For the solar charger to be fully operational as a battery charger, it needs to be connected to a battery.
Although it might look like the solar charger is connected to the battery, it is very well possible that the controller is not receiving
the battery supply, there is no voltage at the battery terminals of the solar charger.
Possible causes can be:
• Loose or missing battery cables.
• Loose cable connections, or badly crimped cable terminals.
• A blown (or missing) fuse in the battery supply cable.
• Open (or faulty) circuit breaker in the battery supply cable.
• Missing or incorrectly wired battery cables.
Battery voltage check
1. Use the VictronConnect app, a connected display or a GX device to find out what the battery terminal voltage of the controller
is. If this is unavailable use a multi meter to measure the battery voltage at the terminals of the controller.
2. Use a multi meter to measure the voltage at the battery terminals.
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MPPT solar charger manual
VictronConnect battery voltage setting
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