[EricH]

It is not against the rules, no.

However, there are other considerations than just the rules.

There's safety. There's crowded areas in the pits and around the field. And there's the tendency of field reset to move unattended carts into their parking areas.

You'll need a neutral gear at a minimum, for field reset to be able to move the cart if needed (or if the battery dies). I'd add a beeper and a light for crowds, and possibly replace (or upgrade) "bumper" with "rangefinder set to stop about 6" from obstacles".

Speaking of obstacles... Can it go over about a 3" hump without spilling its robot? Such humps aren't uncommon in arenas--they're usually wiring covers. What about through a standard doorway? Again, not an uncommon situation, robot going through a doorway on a cart (and having trouble...)

Just a few considerations that, in my mind, would relegate a powered cart to use outside of FRC competitions.