Hello Audioguru, thanks for interest n reply.. i mistakenly wrote 2kv,it is actually 2kw.. if 2kw is impractical design, then tell me about 1.5kw or 1 kw.. otherwise share with me whichever ckt u have of ups/inverter.. i wanna make it for domestic use.. by the way i've seen ups having rating 5kw or less!!! how they be build, if u r saying that 2kw is impractical design?? i thing more then 1 bettery will use for these high power inverters.. i'll wait for ur +ve reply.. thanks..