Generators; Generator Requirements - Xantrex7 UX - REV A Owner's Manual

2.0 System Configuration

Generators

NOTE: Using an AC generator to
power loads when utility
power is not available requires
additional hardware. Please
consult the owner's guide for
your generator for additional
information.

Generator Requirements

20
An AC generator can be used with this inverter/charger: 1) as a replacement or
substitute for utility power; 2) to power loads when utility power is not available
(utility outage); and 3) to charge batteries.
The generator must be of the permanently installed type and not a portable unit
used for emergency power. Small emergency generators may not have a stable
enough voltage or frequency output for the inverter to synchronize to, or provide
enough current to fully charge the batteries.
The maximum charge rate the battery charger can deliver is dependant upon the
peak AC voltage available. Since the battery charger uses only the top portion of
the input sine wave, small variations in peak voltage result in large variations in
the amount of energy to the charger. The charger's rated output is based on a
utility voltage of 120 Vac which has a peak voltage of 169 Vac
ms
peak voltage of 325 Vac ).
p
Low power generators may not produce enough voltage under heavy load
conditions to fully charge the batteries as the voltage peaks may be clipped,
limiting the maximum charge rate. Size the generator appropriately for the
system, including battery charge and load current.
Because generator hookups can vary widely, only basic hookup information is
given. Complex hookups, involving both the utility and generator, require
additional hardware such as a manual AC transfer switch and possibly an
autotransformer for load balancing.
See pages 45-47 for basic generator wiring to the inverter.
(230 Vac
p
©2002 Xantrex Technology Inc. All Rights Reserved.
P/N 975-0026-01-01 Rev A 06/2002
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