Quote:
Originally Posted by apr67
I apologize for resurrecting this dead thread, but I thought this was a good place for this question.
If the alternator is charging the motor and house batteries, and lets say the house batteries are deeply discharged and the motor battery is not, what happens? Does the Motor battery get over charged so the house batteries can get charged, or does it just charge the house batteries at the lower rate that the motor requires? Or something else?
How is this affected by battery makeup (AGM house batteries, standard flooded motor battery) or bank size (6 12v deep cycle batteries on the house side).
Same question if going the other way (from the converter/charger).
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You have a plant 750 coach and all their coaches are wired the same way for that model year. From 2015 through 2017 all the coach have a BIRD (bi-directional relay) with a Trombetta control module located near the house batteries. This relay allows the chassis and house batteries to be connected. The relay can be manually activated by the emergency start switch on the dash. If one battery bank (house or chassis) voltage is above 13.4 volts to 2.5 minutes, then the Trombetta signals the BIRD to close. The BIRD remains closed until both the battery banks goes below 13.1 volts. So to answer your question directly if the alternator is putting out at least 13.4 volts for 2.5 minutes the BIRD is closed by the Trombetta charging the house battery. With shore or generator power the charger will supply at least 13.4 volts to the house batteries (assuming the store/use switch is in the USE position) and after 2.5 minutes the Trombetta will signal the BIRD to close and charge the chassis battery.
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