2.4.10 Auto Generator Start Dry Contact
The solar inverter is built with a very versatile 3-pin dry contact rated at 3A/250VAC on the rear
panel.
The internal relays of the dry contact will give out either “close” or “open” signals.
These signals can be used to indicate the low battery voltage alarm or control a generator.
The NC & C pins are constantly close, they will open when battery voltage reaches low alarm or the setting
in Program 12 (DC to AC Transfer).
The NO & C pins are constantly open, they will close when battery voltage reaches low alarm or the setting
in Program 12 (DC to AC Transfer) to start the generator. Once the generator is started and battery voltage
increases with charging, the dry contact pins will open at the setting of Program 13 (AC to DC Transfer) to
avoid overcharging.
For low battery alarm, when battery setting is not in “LI” mode, it is 2 volts higher than Low DC Cut-off
Voltage for 48Vdc model and 1 volt higher than Low DC Cut-off Voltage for 24Vdc model.
When the battery setting is in “LI” mode, low battery alarm is 5% higher than Low DC Cut-off Soc.
2.4.11 Automatic Recovery Operation
For the M3048BP & M5000H-48BP, it is designed with automatic recovery from:
⚫ Overloads shutoff
⚫ Over temperature shutoff
⚫ Low battery voltage cutoff.
Pls to “Program 06 Automatic Overload Restart ” “Program 07: Automatic OverTemp Restart
”and “Program 21 Low DC Cut-Off Voltage” for more details.
2.4.12 Batteryless Operation
The M5000H-48BP inverter can operate without batteries.
It can convert DC solar power to AC and/or bypass AC input power to power loads.
This function is designed to save battery investment.
In DC to AC mode, the AC output voltage and power will fluctuate with the PV input power.
If the AC input power supply is unstable, the AC output of the inverter will be unstable as well.
The batteryless operation mode only works with loads that can tolerate voltage fluctuations and can work at
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