What is 2AC out function?
When there is no Main/AC IN/GRID INPUT, and the battery lower than the setted voltage.
the main AC out will cut off automatically, the battery or pv only offer power for the second AC out To Guarantee your important equipment always running.

NOTE
This is a wide voltage Hybrid Solar inverter, If Solar Inverter without external battery ,The voltage which starts to connect to the solar panel must be above 150V for the inverter to work normally, if with external battery 120V is working.
DO NOT CONNECT THE SECOND OUTPUT TO THE GRID,IT WILL DAMANGE YOUR INVERTER
YINGFA 8.2KW 10.2kW Hybrid Solar Inverter 48V 220V 500VDC Dual Load Output BMS 2 MPPT 160A Pure Sine Wave PV Power inverterThis wide voltage Hybrid Solar inverter operates differently based on whether an external battery is used. Without an external battery, the solar panel connection must start at a voltage above 150V for normal operation. With an external battery, the minimum operational voltage is 120V.
Caution:
Do not connect the second output to the grid as it will damage your inverter.
Dual AC output: under normal conditions, the main circuit and secondary circuit outputs are used normally. When there is no PV and mains power input and the battery voltage is too low, the main circuit is disconnected and only the secondary circuit output is retained to save power.
Dual PV input: facilitate the connection of solar panel and reduce the use of combiner box.
Four modes can be choose when charging battery:
Utility first: Utility will charge battery as first priority source, then Solar Power.
Solar first: Solar will charge battery as first priority source, then Utility Power.
Solar and Utility(default): Solar Power and Utility power will charge battery at the same time.
Only Solar: Solar Energy as the only source charge battery.
Three Output modes can be choose:
Utility first (default):Utility will provide power to theloads as first priority, Then Solar Power, battery Power
Solar first: Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, utility will supply power to the loads at the same time,then battery power.
SBU Priority: Solar energy provides power tothe loads as first priority. If solar energy is not sufficient to power all connected loads, battery energy will supply power to the loads at the same time.
New features:
Built-in BMS function. Lithium Battery Activation, has a reactivation feature to awaken a sleeping lithium battery. The small charge current to activate the protection circuit and if a correct cell voltage can be reached, it starts a normal charge.Dual AC output, one for the main load (UPS function), one for the conventional load


