I have microtek inverter from last 7 years and he is working properly till now with low maintenance. his battery back up superb his battery running around 5 hours continuously.
And we are happy with his maintenance we are fill filter water after 6 month in battery and he is continuously work properly.
And one of thing I suggest to my family for this product because I have a PC around 9 yers old and his UPS also microtek and I am impress with my UPS performance and I take this decision for Microtek invert.