Product Manual

9.2.7. Battery voltage setting too low

The battery will not be charged if the “battery voltage” setting in the VictronConnect App is set at a voltage lower than the actual

system voltage.

Check that the battery voltage is set properly in the settings of the solar charger. The battery voltage setting has to match that of

the voltage of the battery.

To access the “battery voltage” setting, navigate to the controller settings in VictronConnect and then click on the “Battery”

settings menu.

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.

VictronConnect battery voltage setting

9.2.8. 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 in an ESS 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 of 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.

• An external device or a switch can turn the solar charger off via the remote on/off terminal. For more info see Remote terminal

is missing, is disconnected or external control is active [41].

9.2.9. 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.

MPPT solar charger manual

Page 43 Troubleshooting and Support