Solar tapes are used in PV modules in two forms: interconnecting strips or sinks and PV busbars, both of which are required in a typical silicon solar cell, where the PV interconnecting strips are soldered directly to the silicon crystals to connect the solar cells in the solar panel to each other. The PV busbar is a hot-dipped tinned copper conductor installed around the perimeter of the solar panel, and the PV busbar connects the interconnection strips to the junction box. Thin film solar panels generally only require a busbar.
Common specifications for solar photovoltaic tinned copper tape
Automatic wire spool mounted tinned copper strip
◆Copper base: the use of imported refined tough oxygen-free copper / T2 purple copper, copper content ≥ 99.99%, conductivity ≥ 98%
◆Resistivity of the copper base: oxygen-free copper ≤ 0.0165Ωmm2/mT2 purple copper ≤ 0.0172Ωmm2/m
◆Coating composition: 62%Sn36%Pb2%Ag (optional)
◆Coating thickness: single-sided coating 0.01～0.05mm, uniform coating, bright and flat surface.
◆Coating melting point: 179℃
◆Tensile strength: soft state ≥ 25kgf/m㎡ semi-soft state ≥ 30kgf/m㎡
◆Welding tape elongation: soft state ≥ 35% 3/4 soft state ≥ 25% 1/2 soft state ≥ 15%
◆Width error：±0.1mm
◆Thickness error: ±0.01mm for interconnection tape, ±0.015mm for sink tape
Leaded and silver coated copper strip
◆Copper base: using imported refined tough oxygen-free copper / T2 copper, copper content ≥ 99.99%, conductivity ≥ 98%
◆Resistivity of the copper base: oxygen-free copper ≤ 0.0165Ωmm2/mT2 purple copper ≤ 0.0172Ωmm2/m
◆Coating composition: 63%Sn36%P2%Ag (optional)
◆Coating thickness: single-sided coating 0.01～0.05mm, uniform coating, bright and smooth surface.
◆Coating melting point: 179℃
◆Tensile strength: soft state ≥ 25kgf/m㎡ semi-soft state ≥ 30kgf/m㎡
◆Welding tape elongation: soft state ≥ 35% 3/4 soft state ≥ 25% 1/2 soft state ≥ 15%
◆Width error：±0.1mm
◆Thickness error: ±0.01mm for interconnection tape, ±0.015mm for sink tape
Leaded tin coated copper tape
◆Copper base: the use of imported refined tough oxygen-free copper / T2 copper, copper content ≥ 99.99%, conductivity ≥ 98%
◆Resistivity of the copper base: oxygen-free copper ≤ 0.0165Ωmm2/mT2 purple copper ≤ 0.0172Ωmm2/m
◆Coating composition: 63%Sn37%Pb, 603%Sn40%Pb (optional)
◆Coating thickness: single-sided coating 0.01～0.05mm, uniform coating, bright and flat surface.
◆Coating melting point: 183℃, 190℃
◆Tensile strength: soft state ≥ 25kgf/m㎡ semi-soft state ≥ 30kgf/m㎡
◆Welding tape elongation: soft state ≥ 35% 3/4 soft state ≥ 25% 1/2 soft state ≥ 15%
◆Width error：±0.1mm
Thickness error: ±0.01mm for interconnection tape, ±0.015mm for sink tape
Lead-free environmentally friendly tin-coated copper tape
◆Copper base: using imported refined tough oxygen-free copper / T2 copper, copper content ≥ 99.99%, conductivity ≥ 98%
◆Resistivity of the copper base: oxygen-free copper ≤ 0.0165Ωmm2/mT2 purple copper ≤ 0.0172Ωmm2/m
◆Coating composition: 96.5%Sn3.0Ag0.5%Cu, 96.5%Sn3.5Ag (optional)
◆Coating thickness: single-sided coating 0.01～0.05mm, uniform coating, bright and flat surface.
◆Coating melting point: 217℃, 221℃
◆Tensile strength: soft state ≥ 25kgf/m㎡ semi-soft state ≥ 30kgf/m㎡
◆Welding tape elongation: soft state ≥ 35% 3/4 soft state ≥ 25% 1/2 soft state ≥ 15%
◆Width error：±0.1mm
Thickness error: ±0.01mm for interconnection belt, ±0.015mm for convergence belt
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