I put Power Management in my shop a few months ago and have been very pleased with my investment, it has saved me $155 per month through the summer months and this summer has been a record breaker many times over . It sure is nice knowing that when I get my next bill from Com Ed I’ll be getting a discount and thats for the rest of my life. I believe in this product so much that I installed it in my own home, sons home and telling my friends all about it. Thank You Power Management for introducing me to something that is rewarding over and over again.