I believe a solar would be adequate. Indy has never given me trouble with fencing in the nearly 10 years I've had him. He was pasture boarded at a farm with a draft mare for a few years that had 2 strands of hi-tensile wire that wasn't hot 75% of the time, and he could have stepped over parts of the wire had he really
wanted to. I'm thinking about doing the electric rope as it is more visible and seems safer to me. We really just need to be able to get the fence up quickly so I can stop paying $225 for board.
Lucky for me my fiance is quite the handy man!