08535

Will be taking my 08 535i off the road for 4 to 5 months during the New England winter, should I disconnect the battery and use a tender or leave it connected and use a tender?

seanjordan20

You accomplish the same thing either or.

neilv

I store my E90 for the winter/Store my E61 for the summers. I usually pull the batteries out of the car(and inside) and hook a 1.5A charger on to them every now and then just to make sure they are full.

FormerE30Owner

I store mine for 3 months and either add an extra battery in parallel to the connected battery or put a tender on the connected battery. No hassle start after 3-4 mos and no resetting of clock etc., either way.

08535

Thanks for the feedback, i might just disconnect the negative leave it in the car and put a float charge on it.

FormerE30Owner

If you are willing to do that, why not leave the battery connected and put a float charge via the "booster" terminals in the engine compartment?

08535

Any recommendations on a good float charger

scottalexander

Regarding any recommendations on a good float charger...

I have a Noco Genius 7200 that is powerful.

Next:

Knowing how our modules on the e60 are so hungry for electric power and want to energized, why remove the battery from the car.

Doesn't that add a layer of module problems when the modules do not have power to them for many months?

08535

Thanks Scott, good point

TwoPedal

I also use the Noco Genius 7200. It's an excellent charger/tender with an AGM option for E60s with that battery type. Truly a set-it-and-forget-it product.