This week we went on a camping trip. For three days the van sat at the camp site without being driven, but the lift gate and sliding doors were opened and closed frequently as we needed to store our food inside the van to keep it away from critters. Each time a door is opened the van woke up and drew a current of 15 amps or more which then tapered down to a fraction of an amp as the van went back to sleep. As you might imagine, doing this repeatedly over a long period of time gradually draws down the 12 volt battery. By the time we were ready to leave this morning the voltage was down to 12.0 volts when the van was idle and 11.7 volts when it was awake. When we were finally ready to leave and turned on the van the 12 volt battery started charging at the rate of 86 amps! This seems like a very high charging current to me, but maybe somebody else has better knowledge about how much charging current these batteries can withstand. We made two stops during the trip home, which you can see in the chart as dips in the voltage and current. When we got home and after the van got unloaded and went back to sleep the idle voltage was back up to 12.86 volts.
I think the lesson to be learned from this is that if you go camping and need to open and close doors frequently, then once every day or two you should turn on the van for 15 minutes or more to replenish the 12 volt battery. If we had continued several more days without turning on the van I think we might have needed to jump start it.
2018 Molten Silver Pacifica Hybrid Limited purchased Nov 30, 2017.