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3.0 OPERATION
© 2001 Xantrex Technology Inc. All Rights Reserved.
P/N 975-0013-01-01 Rev B 10/01
20
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).