Xantrex SWI - INSTALLATION REV B, Installation Manual

3.0  OPERATION

© 2001 Xantrex Technology Inc.  All Rights Reserved.

P/N  975-0013-01-01 Rev B  10/01

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Settings

When operating PS or SW Series inverters in a series stacked configuration the following settings must be

changed (via an SWRC/SWCA for PS Series inverters) for proper operation.

Automatic and Manual Generator Control

When multiple inverters are used with a generator, the inverter connected to the generator via the Generator

Relay Module (GRM) is designated as the “generator controlling” inverter. The most efficient battery charging is
achieved by setting the charging parameters of each inverter slightly differently (using an SWRC/SWCA for PS
Series inverters).

Bulk and Float Charging

• Set the 

BULK VOLTS DC to the same setting on both inverters.

• Set the 

FLOAT VOLTS DC to the same setting on both inverters.

• Set the Absorption time for a shorter period on the “generator controlling” inverter. When the “generator

controlling” inverter reaches the 

FLOAT VOLTS DC level, it will shut down the generator.

Equalize Charging

• Set both inverters to the same 

EQUALIZE VOLTS DC setting.

• Set the 

EQUALIZE TIME on the “generator controlling” inverter to a shorter equalize time.

• To start an Equalize charge (manually or automatically), set both inverters to 

EQ (accessible by pressing the

green GEN MENU button on the SWRC). This allows both inverters to charge at the equalize voltage.

• During the equalize charge the BULK LED will slowly flash on each inverter, indicating the 

EQ selection has

been set via the 

SET GENERATOR menu item.

Automatic Equalize Charging

If the inverters are set to automatically charge the batteries via the generator, the equalize process will begin

during the next, automatically started, generator run period. When the equalizing process has completed, the
generator automatically stops and the cursor returns to the 

AUTO position in the SET GENERATOR menu item on

the “generator controlling” inverter. The “non-generator controlling” inverter must be set from 

EQ to OFF from the

SET GENERATOR menu item or the inverter will start another equalize charge the next time the generator is
started.

Manual Equalize Charging

If the batteries were equalized using a manually started generator or from the utility grid, the FLOAT LED

illuminates, indicating the equalization process is complete. Set the cursor to 

OFF on both inverters under the SET

GENERATOR menu item when the equalization process is complete.

NOTE: If using multiple battery temperature sensors (BTS) ensure they are all connected to
the same location (battery).