Sterling Power Products DAI-1500C-24xx - Manual (Page 19)

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E.7.5 Battery Condition
Deep discharging of batteries leads to high losses in capacity and early aging.
That is why the
unit will constantly monitor the battery condition. When battery
voltage gets too low the Invertek switches OFF. The multi-display will show
“
” or ” ” (Low voltage cut out P-12) the “RUN/STOP” LED RED blinks.
When the battery voltage returns to 12.1V resp..24.2V, the inverter switches ON
automatically. One minute before the Inverter switches OFF due to low voltage a
buzzer will be heard.
The low voltage is set to 11.8V resp. 23.6V. These settings are standard for
most batteries. The voltage levels are maintained by the built-in
Battery-Management-System of the Invertek which looks at the load and battery
condition and adjusts to suit.
This setting is comparable with the levels of 10.8V
resp. 21.6V, which are given
for most batteries on nominal load.
Equalization Charging
Absorption Stage