Power inverter won't stop running.

I woke up this morning and checked the converter in my RV and the fan is off and seams to be working just fine. I did check the battery and it seams fine as well. I picked up my RV at the dealer yesterday afternoon and it's been there for several weeks without being plugged in could that cause the fan to run as it charges the battery? I know it's takes a while to charge a deep cycle batteries so I'm guessing it could?