Ground fault detection
The solar charger does not have internal ground fault protection.
The USA National Electrical Code (NEC) requires the use of an external ground fault protection device (GFPD).
The system electrical negative should be bonded through a GFPD to earth ground at one (and only one) location.
When a ground fault is indicated, battery terminals and connected circuits may be un-grounded and
hazardous.
4.5. Connection overview
ID Description
A Ground screw.
B Battery screw terminals.
C PV screw terminals.
D VE.Direct socket.
E LEDs.
F Rotary switch.
4.6. Electrical connections
WARNING: Check the polarity before connecting the battery and PV voltage.
WARNING: Follow the correct installation procedure described in this chapter.
IMPORTANT: Torque the battery and PV connections at 1.6Nm.
Connection order electrical connections:
1. Connect the battery: allow the solar charger to automatically recognise the system voltage (wait 10 seconds).
2. Connect the PV.
3. If applicable, connect the VE.Direct port.
The correct connection order is necessary to allow the automatic system voltage detection to setup properly. It is only allowed to
connect PV first when the system voltage is manually set before connecting the battery. Not following the correct procedures can
disable or damage the charger and/or the installation.
See the below figure on how the basic electrical connections are made:
MPPT solar charger manual
Page 12 Installation
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