User guide

12
• Low Voltage Disconnect (LVD)
The automatic load disconnect is an option. If the battery
falls below 11.5 (or 23.0) volts, the load is disconnected from
the battery to protect against harmful deep discharges. A
2-second delay prevents load disconnects from transients.
The load is automatically reconnected when the battery
voltage recovers to 12.6 (or 25.2) volts.
• Battery Disconnect
If the battery is disconnected during the daytime, the PV
array will continue to provide power to the controller. The
SunSaver will immediately go into PWM and provide power
at a constant voltage to the load. This may continue as long
as power is available from the PV array.
• Parallel Controllers
The SunSaver controllers work very well in parallel configura-
tions. No blocking diodes are required. The only constraint is
that each controller must have an independent and separate
PV subarray and load. Make sure that each SunSaver’s rating
for PV and load current is not exceeded. (see Section 5.3-2)
• Auxiliary Generators
Engine generators and other sources of power may be con-
nected directly to the battery for charging. It is not necessary
to disconnect the SunSaver from the battery. However, do
not use the SunSaver to regulate these other generators.
• Reverse Current
The SunSaver prevents the battery from discharging through
the PV array at night. There is no need to install a blocking
diode for this purpose.
• Noise
The SunSaver circuit minimizes switching noise and filters
all noise output to extremely low levels when the system
is properly grounded. If noise is present in a telecom load, it
is most likely a grounding problem in the system.
6.3 I NSPECTION AND M AINTENANCE
The following inspections and maintenance tasks are
recommended at least once per year for best controller perfor-
mance.
1. Confirm that the correct battery type has been selected
(sealed or flooded with the jumper).