Hi
All
The SV system only charges its backup battery when the supply voltage is greater then 12.25 volts.
This is done so that the backup battery is only charged whilst the engine is running (says manual)
But the terminal voltage of the LiFeP battery is a lot higher than Lead acid while not being charged, 13.1 volts or so.
This means the current draw from the LiFeP battery to the SV system whilst the engine is not running
will be higher if the the SV backup battery needs charging.
As LiFeP aircraft batteries become more common maybe a SV option could be added to increase the threshold
voltage at which backup battery charging begins?
Doug
All
The SV system only charges its backup battery when the supply voltage is greater then 12.25 volts.
This is done so that the backup battery is only charged whilst the engine is running (says manual)
But the terminal voltage of the LiFeP battery is a lot higher than Lead acid while not being charged, 13.1 volts or so.
This means the current draw from the LiFeP battery to the SV system whilst the engine is not running
will be higher if the the SV backup battery needs charging.
As LiFeP aircraft batteries become more common maybe a SV option could be added to increase the threshold
voltage at which backup battery charging begins?
Doug