Before some time I purchased the su kam brainy invertor, because my some friend was very satisfy to buy this invertor, but how say them this invertor is very good working, before this purchase my bettry life was very low, bettry backeup is very own but, after purchase this no down my bettries, this inveror makes fully copper wire so its quality is very high full, I advise all peron they makes their life to buying this