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OPERATION
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.
NOTE: THE BUY AND SELL METERS
kWh METER WITH
DETENTS (ONE-
UTILITY GRID
WAY) 120/240
120/240 VAC
"BUY" METER
AC LOADS
120/240 VAC
AC LOADS
TO BE
BACKED UP
120 VAC ONLY
WIND
FUSED
GENERATOR
DISCONNECT
SOLAR
FUSED
ARRAY
DISCONNECT
Figure 29, Utility Interactive Line-Tie System With Battery Backup Flow Diagram
2001 Xantrex Technology, Inc.
Page
5916 - 195th Street N. E.
88
Arlington, WA 98223
CAN BE COMBINED
INTO ONE TWO-WAY METER
IF NET BILLING IS ALLOWED.
kWh METER WITH
DETENTS (ONE-
WAY) 120/240
VAC
VAC
"SELL" METER
AC DISCONNECT
(LOCKABLE)
SERVICE
ENTRANCE
PANEL
120/240 VAC
BREAKER
60A/120 VAC
60A/120 VAC
CIRCUIT
BREAKERS
(FOR HOUSE)
#6 AWG
REQUIRED
AC SUBPANEL
FOR UTILITY
BACK-UP AC
LOADS
"PRODUCED"
METER
CONTROLLER
PV CHARGE
CONTROLLER
(OPTIONAL)
kWh METER WITH
DETENTS (ONE-
WAY)
BREAKER
120 VAC
"PRODUCED"
METER
FUSED
AC OUTPUT
DISCONNECT
TERMINALS
60A/120 VAC
NEXT TO THE
INVERTER
BATTERY
STORAGE
SYSTEM
Telephone: 360/435-8826
Fax: 360/435-2229
www.traceengineering.com
UTILITY INTERACTIVE
LINE-TIE SYSTEM WITH
BACKUP OF CRITICAL AC
LOADS
DESIGNATES
BI-DIRECTIONAL
CURRENT PATH
OUTDOORS NEXT
TO THE UTILITY
SERVICE
ENTRANCE
FUSED
DISCONNECT
60A/120 VAC
NEMA 3R
OUTDOOR TYPE
FUSED
NEXT TO THE
DISCONNECT
INVERTER
60A/120 VAC
AC INPUT
TERMINAL
TRACE SW-SERIES
INVERTER/CHARGER
120 VAC
DC BATTERY
TERMINALS
BATTERY
DISCONNECT
SW Series Inverter/Charger
Part No. 2031-5
Rev. C: February 2001
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