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88
2001 Xantrex Technology, Inc.
5916 - 195th Street N. E.
Arlington, WA 98223
Telephone: 360/435-8826
Fax: 360/435-2229
www.traceengineering.com
SW Series Inverter/Charger
Part No. 2031-5
Rev. C: February 2001
UTILITY INTERACTIVE OPERATION WITH UTILITY BACKUP
The SW Series Inverter/Charger is capable of operating both as a utility interactive and a stand-alone
inverter. This allows the system to normally sell the excess power to the utility and, once an outage has
occurred, provide power to the AC loads from the battery.
The loads that will be provided with utility backup during outages must be isolated from the non-utility
backed-up loads. This usually requires the addition of an AC load center sub panel for the output of the
inverter.
Figure 29, Utility Interactive Line-Tie System With Battery Backup Flow Diagram
TRACE SW-SERIES
INVERTER/CHARGER
120 VAC
NOTE: THE BUY AND SELL METERS
CAN BE COMBINED
INTO ONE TWO-WAY METER
IF NET BILLING IS ALLOWED.
UTILITY GRID
120/240 VAC
kWh METER WITH
DETENTS (ONE-
WAY) 120/240
VAC
“BUY” METER
AC LOADS
120/240 VAC
SOLAR
ARRAY
FUSED
DISCONNECT
PV CHARGE
CONTROLLER
WIND
GENERATOR
kWh METER WITH
DETENTS (ONE-
WAY) 120/240
VAC
“SELL” METER
BATTERY
DISCONNECT
UTILITY INTERACTIVE
LINE-TIE SYSTEM WITH
BACKUP OF CRITICAL AC
LOADS
BATTERY
STORAGE
SYSTEM
AC INPUT
TERMINAL
FUSED
DISCONNECT
FUSED
DISCONNECT
60A/120 VAC
DC BATTERY
TERMINALS
BREAKER
60A/120 VAC
SERVICE
ENTRANCE
PANEL
120/240 VAC
BREAKER
60A/120 VAC
CIRCUIT
BREAKERS
(FOR HOUSE)
FUSED
DISCONNECT
60A/120 VAC
NEMA 3R
OUTDOOR TYPE
DESIGNATES
BI-DIRECTIONAL
CURRENT PATH
OUTDOORS NEXT
TO THE UTILITY
SERVICE
ENTRANCE
NEXT TO THE
INVERTER
AC OUTPUT
TERMINALS
AC SUBPANEL
FOR UTILITY
BACK-UP AC
LOADS
“PRODUCED”
METER
AC LOADS
TO BE
BACKED UP
120 VAC ONLY
FUSED
DISCONNECT
60A/120 VAC
(OPTIONAL)
CONTROLLER
AC DISCONNECT
(LOCKABLE)
kWh METER WITH
DETENTS (ONE-
WAY)
120 VAC
“PRODUCED”
METER
NEXT TO THE
INVERTER
#6 AWG
REQUIRED