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1. Introduction
Your new PROwatt 250 power inverter is a member of the most
advanced line of DC to AC inverters available today. It will
give you years of dependable service in your vehicle, boat, RV,
or remote home.
To get the most out of your PROwatt 250, it must be installed
and used properly. Please read the installation and operating
instructions in this manual carefully before installing and using
your PROwatt 250. Pay special attention to the CAUTION and
WARNING statements in this manual and on the PROwatt 250.
CAUTION statements identify conditions or practices which
could result in damage to your PROwatt 250 or to other equip-
ment. WARNING statements identify conditions or practices
that could result in personal injury or loss of life.
2. How Your PROwatt 250 Works
An inverter is an electronic device that converts low voltage DC
(direct current) electricity from a battery or other power source
to standard 115 volts AC (alternating current) household power.
In designing the PROwatt 250, Statpower has used design tech-
niques previously employed in computer power supplies to give
you an inverter that is smaller, lighter, and easier to use than any
other inverter with a similar power rating.
2.1 Principle of operation
The PROwatt 250 converts power in two stages. The first stage
is a DC-to-DC converter that raises the low voltage DC at the
inverter input to 145 volts DC. The second stage is the actual in-
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