I have been using microtek inverter from 4 years. it was giving a good backup for first 2 years and it started taking more time to charge and and less backup. fans would make noise while running all thw time inverter takes control after the main light is off from the grid. I noticed that inverter heats up after a while of running. the inverter is acerage but the company can make its products even more better just but making a few improvements. I wont recommend it for full house inverter backup.