Lithium conversion on 480

I might have asked all of you before, but we will soon need new batteries and it seems reasonable to switch to lithium. 480’s have limited cabinet space and the present batteries are under the sofa. Has anyone switched? which Lithium batteries are the best? how about the conduction stove and oven? I met someone on 500 and they had a combined electric and propane stove system.
I would like that. we have a solar arch and probably would be upgrading our solar panels at the same time.

In all of the best possible worlds we would hire someone to do this, but expense and the basic need to understand what goes on kind of forces us to do this ourselves.

Thanks for all advice.
Hppy Father’s day to all–all over the world!