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5.11
Battery-Based Systems
PS-XXX pump systems can be operated
from batteries.
Install a jumper wire between terminals 6
and 7 to set the controller to battery mode.
This will de-activate the MPP-Tracking
function and activate the Low Voltage Discon-
nect.
Wiring:
Connect the battery directly to the PS-
XXX controller and NOT to the load terminals
of the charger. They may not be strong
enough to deliver the load spike during
starting of the pump. The PS-XXX controller
has a Low Voltage disconnect function to
protect the battery from beeing over
discharged.
Some charge controller monitor the capacity
of the battery and regulate the charging
accordingly. That does not work when the
battery is connected to the PS-xxx controller.
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 with the manuals of
the charger manufacturer
Overload protection
Install a fuse or circuit
breaker near the power source. For either 24
or 48V , use a 25 amp circuit breaker ( PS200
or PS600 Systems) or a time-delay (slow
blow) fuse. The purpose of this protection is
for safety in case of a wiring fault, and to
provide a means of disconnect when install-
ing or maintaining the system.
PS-XXX
controllers have electronic over-current
protection against motor overload.
CAUTION The
PS-XXX control-
ler is NOT a
battery charge
controller. A
charge controller
prevents battery
overcharge. It is a
normal part of
any renewable
energy battery
charging system.
Be sure the
charge controller
is appropriate to
the type of
batteries used.
(Sealed batteries
use lower voltage
settings than
liquid-filled
batteries.)
Wire Sizing for the DC circuit
Wire must be
sized for no more than 5% voltage drop at 20
amps (starting).
Refer to a wire sizing chart specifically for 24V
or 48V, or follow these examples:
24V SYSTEM:
#10 wire to maximum distance of 30 ft.
Metric: 6 sq. mm to max. 10m
48V SYSTEM:
#12 wire to maximum distance of 22 ft.
Metric: 4 sq. mm to max. 13m
GREATER LENGTHS
For each 150% in-
crease, use next larger wire size.
ON/OFF switching
You can switch either the
primary power to the controller, or the remote
(float switch) control circuit. For an explana-
tion, see Section 5.12 (Pressurizing Sys-
tems) “Pressure switch connection”.
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
PS
battery-
system controller will turn off at low voltage,
and turn back on only after the battery has
recovered significantly. The set points are:
24V SYSTEM:
OFF at 22V
ON at 24V
48V SYSTEM:
OFF at 44V
ON at 48V
A controller in disconnect mode can be reset
manually by turning off/on, but it will quickly
disconnect again if the battery is not gaining
a substantial recharge.
