Lorentz PS2-150 Series Manual For Installation And Operation page 31

7.6.5 Input Wiring for Battery-based Systems
CAUTION – The PS2-4000 pump system can
not be operated from batteries.
The battery mode for PS2-150 to PS2-1800 controllers
must be activated in PumpScanner. This will deactivate
the MPP-Tracking function and activate the Low Voltage
Disconnect (LVD).
Connect the PS2 controller directly to the battery and NOT
to the load terminals of the charger as the terminals may
not be rated for the starting load current of the pump. The
PS2 controller has a low voltage disconnect function to
protect the battery from being deeply discharged.
Some charge controllers monitor the capacity of the battery
and regulate the charging accordingly. This method does not
work when the PS2 controller is connected to the battery. In
order to provide correct charging the charger should be set
to voltage orientated regulation. This may require a jumper
to be set in the charger. Check the manuals of the charger
manufacturer.
Controller Installation
Short circuit protection: Install a fuse or circuit breaker
near the power source. Use a 30 A circuit breaker or a time
delay (slow blow) fuse.
Low-voltage disconnect function: Lead-acid batteries
can be permanently damaged by over-discharge when the
voltage falls below a critical point. To prevent this, the PS2
battery system controller will turn off at low voltage for at
least 20 minutes, and turn back on only after the battery has
recovered significantly.
Battery high run mode: If high run mode is activated in
PumpScanner, the low voltage disconnect points for 12 V
batteries are changed to OFF at 12.3 VDC, ON at 13 VDC.
Set points for low voltage disconnect
Controller Voltage
12 VDC
PS2-150
24 VDC
24 VDC
PS2-200
48 VDC
PS2-600 48 VDC
PS2-1800 96 VDC
OFF ON
11 VDC 12 VDC
22 VDC 24 VDC
22 VDC 24 VDC
44 VDC 48 VDC
44 VDC 48 VDC
88 VDC 96 VDC
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