Xantrex XW4024-120 Operation Manual page 58

Configuration
3–20
When using the system for time-of-use metering, the system should be designed
with a battery capacity large enough to support loads during the entire peak rate
period without reaching the Low Battery Cut Out setting.
To further ensure the batteries are able to support the loads, an additional source of
power (solar, wind or hydroelectric) is recommended. Depending upon the
capacity of the system, certain heavy loads should only be run during non-peak
periods.
Note:
In the event the batteries reach their Low Battery Cut Out voltage, the inverter
will automatically reconnect to the utility grid to maintain the connected load.
975-0240-01-01