solar electric fence

Just got up the last solar powered unit for my pastures.These units work great,had reg unites that ran to 220 boxes at stable and 2 units that went to box in barn.well being in mississippi we get lots of thunderstorms.Well the last good storm in nov of last year,lightning it the the fence line to the barn unit.it blew the box off the wall.luckly it didn;t burn down the barn.These units are great and they work(i tried out wow)i wouldn"t touch again.Plus my electric bill went down.