I have seen some nice China PVs, and some bad ones.
The first thing I look at is the cell placement. Sometimes, they are crooked, nearly touching other cells in some places, with large spaces between cells in other places.
The next thing I look at is the solder connections on the cells.
I came accross this photo the other day.
Granted, it is a small PV, but the concept is the same.
The cell to cell spacing looks fine... BUT If they can't get the cells in there remotely straight, how is the rest of the quality?
Just amazing.
G-