I am currently using this inverter and really it gives me very poor experience.
It is not durable for much time , it disturb me while doing important works, it takes lots of time to have full charge and provide only 75% of its power and their is much problem of shock circuits.
It is difficult to handle it unusual behaviour and its also make much noise after light goes and its power storage also get finished quickly , which generate problems for me it gives usage of 7-8 hours.