UPS power supply problem

Currently the domestic Santoku strictly counted as cottage goods, because there is no real U.S. Santoku sold, generally Zhuhai and Shenzhen, Zhuhai, the same to be a little more expensive than Shenzhen! But also about 20 difference! Get a Zhuhai Santoku line!

But this thing with or without voltage stabilization, you'd better ask clearly!

More than 200 should be with a regulated voltage, 500A without a regulated voltage will not exceed 200!

More than 300 should be 1000A, right? Otherwise, how can the 500A not get to that price!