Product Manual

10 11
Off-line UPS (Optional)
The Off-line UPS (Uninterrupted Power Source) option allows the Inverter to be used as a
backup power source in the event of external AC power failure.
Legend
AC Power Source
DC Power Source
Inverter
Load
Battery Charger
AC Current
DC Current
Normal Operation
• The AC power source supplies AC
current to both the battery charger
and the load (Running through the
Inverter’s off-line).
• The battery charger supplies DC power
to a battery, maintaining it at full charge.
The battery is connected to the Inverter’s
DC Input Connection(s).
Legend
AC Power Source
DC Power Source
Inverter
Load
Battery Charger
AC Current
DC Current
AC Power Failure
• The Inverter detects a drop in AC
Voltage and begins operation.
• The battery supplies DC current to the
Inverter which inverts it to AC current
to supply the load.
• The Inverter continues operating until it
detects that the AC power source has
been restored or the battery is discharged.
To set up the Off-line UPS
1. Connect the external AC power source to the AC Input Connection.
2. Connect the battery bank(s) to the DC Input Connection(s).
3. Connect the load to the AC Output Connection(s).
4. Turn the Inverter ON. The Bypass LED will glow green indicating the load is being
supplied with AC power through the Inverter’s off-line.
5. If the AC Power fails, the Bypass LED will stop glowing and the Invert LED and 50/60Hz
LED will glow green indicating the Inverter is operating.
The voltage thresholds for the Inverter to take over supplying and to stop supplying AC power
can be changed using InverterWizard to t your specic needs. For more information, see the
InverterWizard manual.
TIP: Choose batteries with enough capacity to ensure that the Inverter can power
the load for the required amount of time in the event of AC power failure.
For example, a 2000W Inverter running from 24 VDC input will draw ~100 amps, so for 2 hours
of runtime the minimum required battery capacity is 280 amps hours of capacity at 24 volts.