Newbie on hybrid

[vanvanvanvan123]

What "electrical appliances" does "hybrid afford one?
I have to choose between
-playing an electronic keyboard that runs on 110.
-better AC than just running on idle the AC
-maybe a blender. or
-small fridge/ chest ( coleman! or whatever you suggest )
Allocation of the available power... I know of,, I can guess here:

Keyboard would only be on for an hour or two. So fridge could be off.
I am kind of Addicted to AC in sunny san diego ... if I have to back off of AC,
I would play keyboard with AC off.
I don't understand hybrid advantage.. as I am new to all this.
Ive heard inverter and lithium battery can run AC, I am assuming for limited time.
What does the addition of inverter lithium battery ADD to the "stock" hybrid vehicle?

Sienna seems like a good choice except for rear suit removal issue. What other mini van, or similar
vehicle is suggested?
I assume the big SUV's are poor on mpg.
I am no longer considering an rv because stealth parking is too important . And daily driving reason.
Thanks much