This inverter has some serious battery issues. the battery backup is not satisfactory at all. it worked fine for 2-3 months. after that it would only last upto 1 hour. not more than that. the inverter has an option of water level sensor for this package but it doesnt include one. the executors are not helpful at all. when I enquired them about the issue they didnt take any action towards it. we had to go to the local repairing shop. and the warranty card was also missing from the brochure. I wouldnt recommend it to anyone.