Last January the question was raised if ice coating affected electric fence. I finally have the answer. A half inch of ice coating reduced the voltage output to 300 volts, a quarter inch reduced it to 300 volts. I broke the ice away in those spots and got a reading of 7700 hundred volts. Normally it runs around 8900 but I think the wet grass frozen to the fence may be draining some of the voltage besides the insulative affect of the ice itself.