I have 3 clinics. I bought 1 microtek n 2 luminous inverters for each of my 3 clinics. The oldest microtek inverter is running fine(for more than 6 years) whereas both my luminous inverters have broken down multiple times (4 year n 3 year old) n needed to be fixed again n again after spending lots of money . Service requests r rarely answered . Crappy products n crappy services.