AC out is easy, as long as amperage is low- just plug an inverter into the light plug. It is "possible" to hook up more directly, but not a great idea.

Getting energy back IN to a prius is ugly.
Doing it directly is NOT worth the hassle. Only exception is the plug in hybrid. It would void the warranty.

Just add more gasoline....

Now.... keeping solar separate, or making the assumption that you are the 1% that has a plugin car- Prius (4.4 kwh) plugin, Leaf (24 kwh), Tesla (60 -100 Kwh)...
That would be up to 100kWh battery (in technical terms, a crapload of electricity- 100,000....wait 1000x100, SIX zero 1,000,000 WATTS)
that's like a hairdryer for 100 HOURS
You would need 20kW of panels to charge it full in one day.

That is assuming that you can do a direct charge- panels to inverter to car battery.... If you are trying to keep the energy outside of your car, then use your house batteries to charge your car, jsut forget it- unless you are Elon Musk, you cannot afford that many panels or batteries. Heck, you probably do not have enough real estate to set up that many panels......

Thanks a bunch! I don't have a plug in and I am not EM (although I clearly know more about cave rescue than he does - who doesn't?)

LOL. Me either, picked up a 2015 Prius C for 10995 (300 mile drive to Wichita, but 3000.00 cheaper than Omaha.)

Gotta LOVE 53.00 Miles per Gallon!!!!

I have four 6.5 gallon Blitz water cans, and one 7 gallon Reliance Aqua-Tainer, which I have rigged with a 45 deg garden hose shutoff, so I can prop it on top of my truck cap and take a gravity shower. It takes me about 2.5 gallons to fully shower, including washing and conditioning my long hair. This was very useful last summer, when I was homeless, between apartments, for the second time in two years.

Living in the bed of a pickup truck for a few months will really open your eyes. Lucky for me, I'm skinny enough to crawl through the rear window of my truck between the cab and the capped bed, which means I can mostly avoid getting wet on rainy days.

There's a tested artesian spring near me, which is where I fill my cans, but I store them empty and dried.

Since I got divorced, there's only me to feed, water, and toilet, my needs are smaller than most.

I've lived in a cabin with no electricity and no plumbing for a year, with a composting bucket toilet outhouse, a single 50W solar panel and a car battery to run LED lights at night and charge my laptop and smartphone, plus run my Amateur Radio set. I had only a woodstove for heat, and a two-burner propane stove for cooking.

All my water had to be carried in and all wastewater carried out. I had no refrigeration, save for in winter, I would keep empty apple cider jugs filled with water to freeze outside overnight, and swap them into my Coleman 54 qt Steel-Belted stainless cooler.