Installation Guide

Connecting Multiple Units
In a multiple-unit installation, each charge controller must be connected to one or more
separate PV arrays. See Figure 11. For other multiple-unit installation considerations,
see Network Installation on page 39.
NOTICE
PV ARRAY AND CHARGE CONTROLLER DAMAGE
Make sure that each charge controller is correctly connected to its own PV array(s) and that
no wires are interconnected between charge controllers.
Failure to follow these instructions can result in equipment damage.
Figure 11Multiple unit DC wiring
Left:Correct wiring —no interconnection between
systems
Right: Incorrect wiring—systems are interconnected
Auxiliary Output Connections
The auxiliary output (dry relay contacts) provides a connector which can accept wire
sizes from #22 to #14 AWG (0.5 to 2.5 mm
2
), copper solid or stranded. As shown in
Figure 12, the auxiliary output can control 12 VDC power to a fan to vent the battery
compartment. See “Configuring the Auxiliary Output” in the Conext MPPT 80 and MPPT
100 Solar Charge Controller Owner's Guide.
Installation Conext MPPT 80 and MPPT 100 Installation Guide
990-91319 This document is for use by qualified personnel 38