Safe to store 2012 Prius V for 3 months?

You should be fine. The hybrid battery will stay charged a long time.
The 12v battery will loose a lot of charge. When you get back, you should charge it before
trying to start the car.
You can get an AGM charger for around $30.00, and a volt meter for around $10-15.

 

I wouldn't be concerned about the hybrid battery. I would have unhooked the 12 volt battery though. I new 12 volt battery with a fresh charge should be good for 3 months sitting idle, but if yours is 4 -5 years old it may have lost some capacity.

 

Agreed, hybrid battery won't discharge or degrade much at all, but the 12v will probably be dead when you get back to it.

Show up with a charger, jump pack or AAA card when it is time to reactivate the car and you'll be fine- just know now that it won't be a quick pick-up.

 

Maybe you have a friend you've left the key with, or access to the key? Can have them put a battery maintainer on it for you, on top of the great advice already given...

moto g(7) power ?

 

Yeah, simple/effective tactic with the 12 volt battery, is disconnect the negative cable from the post. There will still be some drain on the battery over months, but MUCH less.

A 10 mm wrench is all you need to do this. When reinstalling clamp, snug it down, then a little more firmly, but don't go nuts. Then pull gently on connection, ensure it's not loose.

If you can't leave the hatch ajar and car unlocked, you will need to use the mechanic key (built into the fob) to get into the car on your return, and you will need to crawl through into the hatch area and release hatch with the emergency switch (behind pop out panel, just below threshold latch). Also, radio presets, trip meters, various similar memories, will be gone. Window auto-up may need to be relearned, but that's doable, and may not even be needed.

Around 1:40 of first video here:

Swapping in a Gen 4 Prius' 2ZR Engine into the Prius v | PriusChat

by @Ragingfit , shows how to disconnect 12 volt battery cable.

Addendum: reading closer, see you're across the country now. If it's no way practical to disconnect 12 volt now, just prepare for possible/likely problems on your return. Would be good to have a compact jump starter, and research replacement 12 batteries.

 

THIS. The hybrid battery will be fine......and if it is not, then the idle time had nothing to do with it's demise.
When shopping for a small charger, it needs to be a smart, automatic, tender type.
It does NOT need to specify use with an AGM battery.

 

She's not going to be there. So it's going to site as it is now. Hopefully, in a garage so the city
doesn't think it's abandoned.
Actually ANY 12 volt source will will charge the battery. How many amps it is will determine how
long it takes to charge it, also depending on the state of charge the battery has.
Since it is an agm battery, or supposed to be, an agm charger is best. But according to Toyota,
4 amps or less. Or 3.7 something???

 

But not "best" enough to worry about.
Any good lead-acid charger will take an AGM to about 98% of it's absolute maximum charge and that is quite good enough.
And some will do 100% without actually specifying that.

 

wwwhhaattteeverrrrrr

 

if roadside assistance doesn't jump start, get triple a before going back.

 

It's printed on a label YUASA (sorry if spelling is off, not at home to read it). "...not too fast... not at a rate higher than 4.2 A".

I've gotten it to weep electrolyte with a 4 A, but my battery is not 100%.

moto g(7) power ?

 

You're welcome!
Looks like you thought ahead! Good idea!
If your insurance provides the jumping/charging, then you don't need to do anything.
Hope your visit goes well!

 

Please update us when you return as to how things went with starting your Prius.

 

july, august, september