1. collector specification：size diameter 170mm。（1）vacuum tube L1500mm/φ47,L1800mm/φ58， （2）erect-plug 24pcs/set。
2. collector housing : 0.5mm stainless steel，frame 1.5mm stainless steel，insulation material: rock wool or polyurethane。
3. can be series at random, forming super-big solar project，low cost (disadvantage: can’t work normally if one tube damaged)
|
|
|
|
|
