Sunwire - Photovoltaic Wire
Sunwire™ is a copper-based flat wire used to connect silicon cells electrically and to carry out current in crystalline silicon and thin-film photovoltaic modules. Sunwire™ is rolled from round wire to high precision, annealed to extra soft, plated all-over in hot-dip-tinning process and precision level-wound on returnable spools. All standard dimensions, plating alloys and spool sizes are available.
The latest annealing and plating technology in Sunwire™ products is completely chemical-free and compatible with new lead-free soldering alloys and saves energy. It was developed to help our customers to improve their production yield and product performance. Extra soft Sunwire™ reduces cell breakages and reduces electrical resistance in modules. Combined with consistent quality, excellent spooling and straightness, Sunwire™ improves customer's manufacturing process and final product.
Sunwire™ is also an excellent choice for thin film modules.
Sunwire benefits:
Smaller width
- to avoid sacrificing cell yield
- to enable 3-wire solutions for larger cells
Softer material
- to avoid causing stress in the soldering process
- to enable usage of thinner wafers
- to reduce electrical resistance
Streighter material
- to get out the full power of the module
- usable also in large thin-film applications
Tin coating on every surface
We work in constant cooperation with our customers and top universities to improve our products and processes. We are the partner of choice for you.
Crystalline silicon panels
Ongoing development of both multicrystalline and monocrystalline silicon cells requires continuous improvements in the wire. We are developing new products to meet the most stringent technological and market demands for all these applications.
Thin-film panels
With the growth of thin-film solar panel markets, there are new requirements for both the wire and the connections between the wire and the thin-film module. Whether it is amourphous or ‘micromorph’ (microcrystalline / amourphous) silicon. CdTe or CIGS thin-films, we can provide the right solution for the module manufacturers.
Dimensions*
| Rolled from round wire |
|
| Thickness (mm) |
0.080-0.500 (Tolerance +/- 0.010) |
| Width (mm) |
1.000-6.000 (Tolerance +/- 0.080) |
| With slitted edges |
|
| Thickness (mm) |
0.020-0.500 |
| Width (mm) |
6.000-15.000 |
Platings (hot dipped)*
| Lead free |
Sn100; SnAg 96,5/3,5;
SnAgCu 96,5/3,0/0,5 |
| Leaded |
SnPbAg 62/36/2; SnPb 63/37;
SnPb 60/40 |
| Low temperature |
SnBiAg 60/38/2; SnBi 60/40 |
| Plating composition and thickness |
10-40 μm +/- 3 μm each side |
Melting temperatures of different coating alloys
| Leaded |
|
| SnPbAg 62/36/2 |
179 °C |
| SnPb 63/37 |
183 °C |
| SnPb 60/40 |
183/190 °C |
| Lead-free |
|
| Sn 100 |
232 °C |
| SnAg 96,5/3,5 |
221 °C |
| SnAg Cu96,5/3,0/0,5 |
217/220 °C |
| Low temperature |
|
| SnBi 60/40 |
139-171 °C |
| SnBiAg 60/38/2 |
139-170 °C |
Base Materials
| Cu-ETP1 |
CDA 110 |
Electrical Conductivity 100% IACS |
| Cu-OF1 |
CDA 102 |
Electrical Conductivity 100% IACS |
Mechanical Properties
| Tensile Strength |
Rm <250 N/mm2 |
| Available Yield Strenghts |
Rp0.2 <250 N/mm2
Rp0.2 <140 N/mm2
Rp0.2 <110 N/mm2
Rp0.2 <90 N/mm2 |
| Elongation at fracture |
>25 % |
| Camber |
<10 mm/m |
Spools & Discs
|
Spools* |
Discs |
|
SV 150 |
SV 380 |
| Spindle Diameter |
16mm |
102mm |
| Outer Diameter |
152mm |
381mm |
| Width |
121mm |
depens on wire width |
*Also according to customer specifications