Chassis Battery Charging Question
Once the chassis battery is charged, how long should it maintain an acceptable voltage without needing to be charged via the charge bridge?
I have a 2018 MADP on a Spartan chassis. I find that after Iíve driven the coach for several hours, the chassis battery will be at 12.8 volts and will fall below 12.5V after about 15 hours at which time the charge bridge will kick in and charge the battery for a configurable 60 minute period. The charge bridge will then kick in about every 6 hours as the battery voltage drops back down below 12.5v volts and then is charged back up to 12.8 volts.
I have found that when I do the occasional boondocking, I often have a low chassis battery warning by morning time as the voltage has dropped even further below the 12.5 volts mark. My car can sit for months without being charged and starts right up, but the coach only maintain it state of charge for a day (give or take). So the charging of the chassis battery doesnít seem right.
Iíve previously looked at parasitic draws and found that the Spartan Control Module (SCM) was drawing an excessive amount of current. The SCM has been replaced but I havenít yet check for what the parasitic draw now is.
So how often should the charge bridge be kicking in? Silverleaf only allows me to configure the duration for a maximum of 60 minutes. This seems like a short period of time. Should it be longer and if so, how to I make it longer short of putting a wedge in the ďbattery boostĒ momentary switch?
2018 Newmar Mountain Aire 4531 - Spartan K3-500
2015 Jeep Grand Cherokee Overland
SMI AFO, Blue Ox