This product is bought by me last month and fing it cheap and energy efficient and by now I have no problem with this inverter but I really dont think to buy battery of the same company because its battery backup is not good I use another company’s battery and its giving me quite nice energy backup. All in all it has been my good experience with it. A very important point I missed was its look I really liked its colour texture and indications and also it does not do any power fluctuations that I experienced in my previous invertor.