4
You must have a suitable 24V DC battery bank that is maintained and operated to the battery
manufacturer’s recommendation. To ensure operation to WM1500 specification, the battery bank
should have a minimum capacity of 500 ampere hours at the 100 hour discharge rate 24V systems (ask
your supplier if in doubt). Smaller capacity batteries can be used but may result in degraded
performance of the WM1500 under heavy surge conditions.
Installation Example
*SYSTEM FUSE
A system fuse is an extremely important part of any power system, this fuse is designed to give one
point of complete disconnect in case of a serious fault. The fuse should have a sufficient rating so as not
to blow under heavy load conditions. Your inverter will normally be the biggest load in your system, if
this is the case a motor start fuse equal to or slightly higher than the maximum continuous current of the
inverter should be used.
If in any doubt see your supplier or installer.
BATTERIES
High quality deep-cycle batteries
offer good performance and are available in a wide variety of
sizes.
DO NOT USE
ordinary car batteries or engine starting batteries. If a battery is rated only in Cold
Cranking Amps (CCA) and reserve capacity, it is designed to start an engine. Most hybrid type, wet
cell batteries will have a limited life if deeply discharged. These batteries are described as suitable
for engine starting or deep-cycle applications. Do not use maintenance free, wet cell batteries. They
will not hold up well to deep discharging and repeated cycling.
CONNECTION OF AC AND DC WIRING
IMPORTANT:
Before making any wiring connections, check that the circuit breaker on the front
panel is in the OFF position, i.e.; LEVER DOWN.
Your electrician should firstly connect the AC wiring via the three terminal junction box. Carefully
observe the correct connections. Please refer to the diagram on page 4.
BROWN
ACTIVE
(red dot, right connector)
GREEN/YELLOW EARTH
(E, centre connector)
BLUE
NEUTRAL
(left connector)
The lid of the junction box has knockouts to allow conduit entry. Make sure this connection is tight and
safe. Re fit junction box cover.
NOTE:
ALL AC WIRING MUST BE CARRIED OUT BY A LICENSED ELECTRICIAN AND MUST
CONFORM TO AS3000 WIRING REGULATIONS, OR RELEVANT STANDARDS.
Battery
Bank
System Fuse
RFI Ground
Mains Earth
Fuse / CB
A
N
E
Main Switch
Earth Leakage CB
A
N
E
ELCB Protected
Circuits
+
+ -
-
