Projecta IP150 Manual page 13

UNDERSTANDING YOUR POWER REQUIREMENTS
POWER REQUIREMENTS OF YOUR APPLIANCE/S:
All appliances have a rating plate that shows the amount of power (Watts) used or the
current (Amps) drawn under normal use.
The following table shows the maximum combined AC Watts or AC Amps which can
be run by the inverter.
P/No.
AC Combined maximum load (Watts)
AC Combined maximum load (Amps)
Some appliances that use an electric motor or transformer may draw up to 10 times
their power rating when first turned on. These are called inductive loads and are
the most difficult for the inverter to run. Contact your appliance manufacturer for
further advice.
SUITABLE POWER SOURCE
In order to operate the inverter and supply power to an appliance a suitable 12V DC
power supply is required, typically a vehicle or caravan battery, portable power pack
or an independent 12V lead acid battery. For most applications, a deep cycle battery
is recommended for best performance.
The size of the battery used will determine how long the inverter will supply power
to an appliance and how well the inverter will perform. Most batteries are marked with
their size in Amp hours (Ah) or Cold Cranking Amps (CCA).
Because 12V inverters are capable of drawing high currents the inverter should only be
connected to a suitable size battery. Connection to an undersized battery could damage
the battery and will result in the inverter shutting down within a short period due to
low battery voltage.
The amount of power drawn from the battery is proportional to the inverter load.
P/No.
Minimum recommended
battery size
Run time with maximum load
and minimum battery size
Run time for a 100W globe
with minimum battery size
Ideal battery size
IP150 IP300
150W 300W
0.6A 1.2A
IP150 IP300
17Ah 24Ah
(100CCA) (200CCA)
40 min 40 min
80 min 2 hours
50–70Ah 50–70Ah
IP600 IP1000
600W 1000W
2.4A 4.0A
IP600 IP1000
50Ah 75Ah
(400CCA) (550CCA)
30 min 15 min
4 hours 6 hours
50–130Ah 75–250Ah
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