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18 Xantrex PROwatt™ SW Sine Wave Inverter Owner’s Guide
Operation
Inverter Loads
The PROwatt SW Inverter will operate many AC loads within its
power rating. However, some appliances and equipment may be
difficult to operate. Please see “Exceptional Loads” below carefully.
USB Loads
A lot of USB-powered devices such as portable music (MP3)
players, mobile phones, and video game players can be charged and
powered safely via the standard USB port. However, some devices
such as portable GPS receivers and certain cameras may not work
and even cause damage even if you use the USB cable that came
with the product. Be sure that the device only accepts 5 volts and
can be charged or powered using other sources of power. See the
device’s owner’s guide under specifications for information.
Exceptional Loads
Some induction motors used in freezers, pumps, and other motor-
operated equipment need high surge currents to start. The PROwatt
SW Inverter may not be able to start some of these motors even
though their rated current draw is within the inverter’s limits.
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 SW Inverter is trying to start the motor, this may
explain why the motor won’t start. Make sure the length and
diameter of the 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.
Battery Charging Frequency
When possible, recharge your batteries when they are about 50%
discharged or earlier. This gives them a much longer life cycle than
recharging when they are almost completely discharged. For
information about battery chargers, see our web site at
www.xantrex.com.
Maintenance
Routine maintenance is required to keep your PROwatt SW Inverter
operating properly. Periodically you should:
• Clean the exterior of the unit with a damp cloth to prevent the
accumulation of dust and dirt.
• Tighten the screws on the DC input terminals.
PROWatt SW Inverter NA.book Page 18 Wednesday, August 5, 2009 2:24 PM