Cell to module conversion loss
Dear All

can anybody tell me what is the standard cell to module conversion loss?i mean to say if one solar cell is giving 4 watt and i will make module of 60 cell then insted of giving 240 watt its giving 232 watt?
my question are
1)y it is happening?
2)what are the possible ways i can reduce it?
3)any new technologies that can be helful


waiting for your reply...