PV input voltage and battery voltage is qualified, this is to optimize solar production for battery charging.
But the inverter will not convert battery power to AC output.
When the battery is fully charged, the inverter will keep the battery capacity at 100%, and convert the extra
PV power directly from DC to AC to power loads.
When the battery is fully charged, the voltage has to drop by 2 volts (or below 95% of SOC when BMS
communication is established) to activate the charger.
2.4.3 DC&AC Transfer
While in the Standby Mode, the AC input of the inverter is continually monitored. Whenever AC power falls
out of the trip voltages, the inverter automatically transfers back to the Invert Mode with minimum
interruption to your appliances.
The transfer from AC mode to Inverter mode occurs in approximately 10 milliseconds, with the worst case
of 20 milliseconds. And it is the same time from Inverter mode to Standby mode.
Though it is not designed as a computer UPS system, this transfer time is usually fast enough to hold them
up as devices like computers can generally tolerate a max power loss of 20ms.
When the inverters are paralleled, the transfer time is <30ms.
Bypass output power derating:
When AC input voltage drops below 170Vac, the output power will be de-rated linearly to as long as 20% at 90Vac.
2.4.4 Power Saver
There are two working statuses for the inverters: “Power On” and “Power Off”.
When power switch is in the “Unit Off” position, the inverter is powered off.
When power switch is turned to “Power ON”, the inverter is powered on.
When the inverter is powered on, users can activate “power saver” in the program 04 of the software.
The “Power Saver” function is dedicated to conserve battery power when AC power demand is either
minimal or not required at all by the loads.
In this mode, the inverter pulses the AC output in every 30 seconds looking for an AC load (i.e., electrical
appliance). Whenever an AC load (greater than 100 watts) is turned on, the inverter recognizes the need for
power and automatically starts inverting and output goes to full voltage. When there is a small load (less
than 100 watts) detected, the inverter automatically goes back into search mode to minimize energy
consumption from the battery bank.
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