We put solar arrays on the surface of Pluto to recharge the batteries.

You do realize that solar energy on Pluto is very miniscule compared
to here ?!

There is a whole subterranean ocean of liquid water on Pluto.

Says who ?

Where there is water the chemists can get oxygen.

Absolutely and totally impractical. Electrolysis ? Power required
would be vastly prohibitive, and yield far too little.