Recently purchased 2015 Montana 3711FL

[yoloinsc]

We bought our first rv (2015 Montana 3711FL) last week and are getting it delivered a week from now.

The pre-purchase inspection turned up no issues other than the tires needing to be replaced and that the battery should be replaced since it was original and wasn't holding a charge.

So my predicament is that the seller is out of town and is not able to look up the type of battery I want to have on hand before it's delivered.

Does anyone know the correct battery type that I would need for a 2015 Montana 3711FL? From what saw there is only one battery, but I may be mistaken.

Thank you very much for any insights.

[rohrmann]

I would install at least a couple of the biggest 12 volt deep cycle batteries that will fit, or even a couple of 6 volt golf cart batteries, regardless of what was/is installed right now. You may need additional cables, but do it right so you will be set for a while.

[Carl n Susan]

While what you plan to do with the RV impacts what and how many batteries you need, Bob's advice is a good start.

You need less battery power if you plan to be plugged in all the time. Dry camping requires more battery power.

[Daryles]

What Carl said.
IF you plan on doing a lot of boondocking, have a look at lithium batteries.

[yoloinsc]

Thank you both.

The RV will be permanently parked with a constant power source. It will get regular use throughout the year, though less frequently in the winter and not as a permanent residence.

[Disclaimer: This is our first RV, so there's a lot I don't know!]

Are there any suggestions on how to identify the proper physical size battery to buy in advance?

[AZ Traveler]

Originally Posted by yoloinsc

Thank you both.

The RV will be permanently parked with a constant power source. It will get regular use throughout the year, though less frequently in the winter and not as a permanent residence.

[Disclaimer: This is our first RV, so there's a lot I don't know!]

Are there any suggestions on how to identify the proper physical size battery to buy in advance?

There is not a specific size required but the bigger the better. It should be a deep cycle battery vs a starting battery.

[Carl n Susan]

A deep cycle AGM battery will be sufficient for a unit that is always powered. An AGM avoids worrying about water levels (not that it is a big problem, but it is something that needs watching).

[mlh]

What battery and how many depends on how you will use your camper. If it’s going to be on shore power almost any will be fine. Boondock a lot you might want more amp hours. I like to boondock and have one battery. It’s all I need. When it gets low I crank up the generator.
Lynwood