Instruction Manual

Connecting Multiple Units
975-0400-01-01 Revision H 2–21
This manual is for use by qualified personnel only.
Connecting Multiple Units
In a multiple-unit installation, each solar charge controller must be connected to
a separate PV array. For other multiple-unit installation considerations, see
“Network Installation” on page 2–25.
Important: Only one solar charge controller is to have the PV-GFP fuse installed
in installations with multiple parallel solar charge controllers. Before mounting
and connecting the solar charge controllers, remove the PV-GFP fuse from each
unit except one.
WARNING
ELECTRICAL SHOCK HAZARD AND EQUIPMENT DAMAGE
Ensure each solar charge controller is correctly connected to its own PV
array(s) and that no wires are crossed. See Figure 2-11. For example, if PV1
positive and PV2 negative are connected to solar charge controller #1 and
PV2 positive and PV1 negative are connected to solar charge controller #2,
current will flow through the solar charge controllers’ chassis and cause the
ground fault protection fuse to blow, followed by short circuit failure.
Failure to follow these instructions can result in death or serious injury.