we better not catch you usin' a gas powered roto tiller, Mr Yoder
That depends on the district deacon. Some are progressive, some not very much.
Here in Indiana, it varies from allowing gasoline powered homeowner implements like rototillers, lawn mowers, etc. to not allowing rubber tires on tractors and other things.
I'm seeing more and more solar panels on Amish houses in the Nappanee area.