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The HP-AHP20SA series inverter/charger prioritizes power sources based on availability and capacity in two main modes: Battery Mode and No Battery Mode.

Battery Mode:

• PV and Utility Unavailable: Uses battery if above minimum voltage/SOC.
• PV Available, No Utility: PV powers and charges the battery; battery assists if PV is low.
• Both PV and Utility Available: PV primary; utility backs up when the battery is low.
• No PV, Utility Available: Battery powers if sufficient; otherwise, utility supplies.

No Battery Mode:

• PV and Utility Available: PV primary; utility assists if PV is insufficient.
• Only PV Available: PV powers load.
• Only Utility Available: Utility powers load.