Operation
4–6
Inverter Loads
The PROwatt 1000 will operate most AC loads within its power rating
(1000 watts / 8 amps). However, some appliances and equipment may be
difficult to operate, and other appliances may actually be damaged if you
try to operate them with the PROwatt 1000. Please read “Problem
Loads”and “Trouble Loads” carefully.

Problem Loads

Some induction motors used in freezers, pumps, and other motor-operated
equipment need high surge currents to start. The PROwatt 1000 may not
be able to start some of these motors even though their rated current draw
is within the inverter’s limits. The PROwatt 1000 will normally start
single-phase induction motors rated at 1/2 horsepower or less.
If a motor refuses to start, observe the VOLTS indicator while you are
trying to start the motor. If the indicator drops below 11 volts while the
Prowatt 1000 is trying to start the motor, this may explain why the motor
won’t start. Make sure the length and diameter of th e battery cables are
appropriate. Check that the battery connections are good and that the
battery is fully charged. If the cables are sized correctly, the connections
are good, and the battery is charged, but the voltage still drops below 11
volts, you may need to use a larger battery.

Trouble Loads

Some appliances, including the types listed below, may be damaged if
they are connected to the PROwatt 1000:
•Electronics that modulate RF (radio frequency) signals on the AC line
will not work and may be damaged.
•Speed controllers found in some fans, kitchen appliances, and other
loads may be damaged.
•Some rechargers for small nickel-cadmium batteries can be damaged.
See “Precautions For Using Rechargeable Appliances” on pageviii
for details.
If you are unsure about powering any device with the PROwatt 1000,
contact the manufacturer of the device.
CAUTION
Some equipment may be damaged by the PROwatt 1000’s
quasi-square wave output.
PROWatt100.book Page 6 Friday, January 5, 2001 3:03 PM