I will be storing my 2016 ERA 70A in a rented indoor climate controlled storage unit for the winter. Since I will be going on an extended trip out of the country from late September to mid January next year, the coach will be sitting there for three and half months. Furthermore, when I return to Ohio in Januray, it will be in the coldest period of the year and I wouldn't be able to take the ERA out until March or April time (but I will have access to it though and can do things such as exercising the generator, etc.).
My current plan is that after completing the winterization process, I will park the RV in the storage unit, shut off the coach battery switch and hook up a trickle charger to the chassis battery. Here's the link to the unit that I have just purchased:
Amazon.com: Battery Tender 022-0185G-dl-wh Black 12 Volt 1.25 Amp Plus Battery Charger/Maintainer: Automotive
I have read a lot of positive reviews from people who have used this particular charger for long term storage of their car or RV batteries. On the other hand, I've also read comments from others that they don't recommend hooking the battery to a charger continuously for long term storage (I believe I might have read somewhere in the ERA manual to this effect as well but it is not clear to me whether they are referring to a regular charger or a trickle charger.)
I understand that the ERA does have a battery disconnect plug near the brake pedal area that I can pull to isolate the chassis battery as well. But I am not sure whether this is better than the trickle charger approach or not (e.g., do I need to reset some of the things on the RV after disconnecting the chassis battery?).
I welcome any comments from anyone on what you think about my plan.