Hi, We will be leaving for the South at the end of next month for 3.5-4 months of "Snowbirding". My 08 FEH will be in storage in an un-heated garage. I can put a trickle charger on the 12V battaery, but I am concerned about the HV Battery losing charge. Any recommendations?
Thanks, Ken

There's not a lot you can do other than this:

When you park it "for the winter" run it in park with the Defroster on for 5 minutes. This will allow the HV battery to charge to the maximum level.

The car will be good for over 60 days as some have reported, but I have not heard of unused periods for longer than that.

When you return, you may have to do a jump start, or maybe not?!?!
You will be a great guinea pig, so I would love to hear if your car starts first try or not when you return.

If it does not start, and the 12v battery is good, there is a "jump start button" inside the side panel by the driver's footwell that sends 12v power into the High Voltage battery. It takes 8 minutes per button press, and you can do 2 or 3, 8 minute "charges" without draining a good 12v battery.
Check your owner's manual for more information on this.

Good luck, and be sure to report back what happened when you "start 'er up" after winter.

-John

P.S. Make sure you use a "float charger" on the 12v battery and not a "trickle charger". There is a difference.
A trickle charger will put out 1 or 2 amps, and will boil out the water in the battery in a few days, destroying the battery.
A "float" charger puts out about 0.1 amp which is just what the 12v battery needs long-term.
Or, you could remove the 12v battery cables and leave it disconnected for 4 months and be fine. Your choice.
Take off the black ( negative ) side of the battery cable, not the red ( positive side ) first!!!!

There's also a safety plug in the rear on the HV Battery, which when removed, disengages the entire battery system. It's an orange twist plug, and should just twist and pop.

While it's not necessary to remove, there's always that option.

First 4WD Hypermiler

Have you read the FEH FAQ?

Live in Michigan? Let it be known in Michigan Roll Call

Read My Automotive Blog at Rich Rambles

Thanks for the quick replies, Yes, I do have a float charger.