Instruction Manual

Table Of Contents
Automatic PV Array Night Disconnect
975-0400-01-01 Revision H 1–11
This manual is for use by qualified personnel only.
Automatic PV Array Night Disconnect
At night, or when the PV array voltage is less than the battery voltage, the solar
charge controller opens an internal relay to prevent battery current from flowing
back to the PV array. In this mode of operation the solar charge controller draws
minimal power from the battery.
This automatic night-time disconnect eliminates the need for a blocking diode
between the battery and the PV array. If the PV array consists of thin-film or
amorphous solar modules, diodes may still be required to prevent damage
during times of partial shading of the array. Check the documentation provided
with the PV modules.