I decided to invest in quality, "lifetime guarantee" and based on the evidence, having had several appliances damaged due to lightning or power surges (6 aircraft in 4 months!) since I plugged the new machinery above, no problem, and that is 6 months, I hope it will last !! I plugged my washing machines, dryers, freezers each on a decision from RAS despite several storms, so to follow, but they appear to have resolved my problem ...