Long term storage of Prius

traction battery will hold a charge for a long time, 3 months is no problem. pump the tyres to the max sidewall and you're good to go.

 

Depending in witch part of the country you live, I would consider to store the vehicle in a acclimated storage area if possible.
In the extreme cold winter season the NiMH battery could suffer from freezing and that would not be a good thing, I'm just saying.....

 

there is a way to force charge the gen II, not sure about the III.

 

Wayne used to do it in those 80 mpg vids. I forget how he did though.

 

i think you put your left foot on the brake, hard, and floor the accellerator.