v110801
5
Sun. Water.
Life.
BERNT LORENTZ GmbH & Co. KG
Kroegerskoppel 7, 24558 Henstedt-Ulzburg, Germany, Tel. +49 (0) 4193 7548 - 0, Fax - 29,
www.lorentz.de
Errors excepted and possible alterations without prior notice.
4 System Wiring
4.1 12 V Battery System
12V system
Voltage from panels will read 22-25 V when
disconnected (open circuit). Connect the pump controller
directly to battery bank.
Remote Tank Float Switch
Connect float switch to ter-
minals 4-5 of the pump controller when it breaks contact
on rise, to turn the pump OFF. Otherwise use terminals 3-4
for opposite function.
Grounding
Connect either battery minus or solar minus to
ground, never connect both to ground!
Solar Tracking
Use stranded wire for flexibility. Secure
the wires to tracker with plenty of tape. Leave a good slack
loop to allow free motion of tracker.
4.2 24 V Battery System
24 V system
Wiring scheme shows serial wiring for a sys-
tem of 24 V nominal. Voltage from panels should read 45 V
when disconnected (open-circuit).
Remote Tank Float Switch
Connect float switch to ter-
minals 4-5 of the pump controller when it breaks contact
on rise, to turn the pump OFF. Otherwise use terminals 3-4
for opposite function.
Grounding
Connect either battery minus or solar minus to
ground, never connect both to ground!
Solar Tracking
Use stranded wire for flexibility. Secure
the wires to tracker with plenty of tape. Leave a good slack
loop to allow free motion of tracker.
2 batteries 12 V
in series
external
charge controller
external
charge controller
1 battery 12 V
1 PV module 12 V
2 PV modules 12 V
in series
low water sensor
low water sensor
fuse
30 A
fuse
30 A
