long term storage

put a battery tender on the 12 volt battery. if you can't, disconnect it. see if the manual gives any advice on the hybrid battery. pump up the tires to max sidewall pressure or put it on jack stands. be prepared for very rusty brakes when you come back, if you live in a moist area, but that will wear off after awhile. i don't think there will be any major issues. all the best!

 

From Section 1-1 of the manual, relating to the HV battery:

 

I'm not the C owner but Gen III. Anyway - I left my Prius for 3 months. My wife was told to turn it on every week for half an hour to maintain 12V battery charged. Unfortunately she has also to travel and when I came back the 12V was dead flat. I jump started the car (first time with another vehicle, then - using motorcycle battery). Everything was perfect. The HV battery showed almost full charge (two bars only less from top). Of course 12V accu is to be replaced, but in general the car is running fine. And climate here (North Poland) is more aggressive than L.A. during winter months. The garage where the car was stored is unheated, temperatures around 32-42 F. No worries. Being on you place I would remove 12V from the car and connect it to some trickle charger.
Also the idea of the jack stands is correct - to release tension from the suspension and to avoid deformation of tires.
Whether the storage is clean (free of dust, humidity and spiders consider to leave one window quarter inch open - if any moisture is left inside.

 

Sell this Prius.

When you can care for a Prius again, buy another Prius.

The Prius is a great car to drive, it does not sit well. Not more than 3 weeks, at best.

 

from rob's post of the owners manual, i would try to charge up the hv battery as much as possible before parking it. i think you can hold the brake down with one foot and floor the accellerator to force charge the battery.

 

In Drive mode?

 

yes, there are posts here somewhere. maybe it's only gen II, i'm not sure.

 

Isn't the car meant to automatically overrule the accelerator command if you keep your foot on the brake?

 

I did try it now. Not much difference than leaving in "P" mode. ICE is not revving too high, besides - the Energy Monitor shows power delivery to wheels - somehow I have a feeling that is not "healthy" for the HSD. In addition - imagine - incidentally you may release the brake for any reasons and you may rocket forward making almost "wheelie"...