I bought this inverter 1 year ago, with a 150 ah battery. First few days it was working fine. After few month I faced some problems. First of all I didn’t get good backup time. I got about 40 minutes only. I was using a load of 300 watt. 2 fan 2 tube light. And the inverter was doing a humming noise. The electronics were highly heated in a little time. The coil of one of my fan was cut off. I have to buy a new fan. I also lost two led lights. And then I took the decision to change the inverter. I was totally robbed by luminous. Please don’t buy this thing.