Have I grown by my Samsung 32 "TV to provide these inverters with power. As soon as I put the TV into the wall socket growled the TV so loud that I was afraid for my TV, mind you, the TV was on standby. (Whether it is harmful for the unit I can not say). The TV could be turned on and run with it, but the hum was louder than the TV speakers. When connected to my laptop AC adapter grumbled also. This is probably due to the square-wave voltage. Property me then a bought Weco sine wave inverter. nachlesbar review is :)