I had bought Microtek Inverter for my office about 4 years back and till date there is no complaint at all. I am completely satisfied with the product. And also we use in home its better to charge and for use at home. u dont need to big baterry for this u can use it with any battery. Its take minimum time to charge and lobg time life. we are happy to use it and thanks to microtech company for this invention. very very thanks. Love u