The new flux gels EO-S-002, -007 and -009 were developed for use in the manufacture of solar modules. The gels are based on the same fluxes that were specially developed for the solar industry, in particular for soldering Solar modules, tabber and stringer material as well as connecting cells, and therefore have the same activators.
Flux gels are generally used for repair work and re-soldering. In the past, it was often necessary to use fluxes for manual and repair soldering. However, these contained different activators to those used for series production. Thanks to the uniform activators of the Emil Otto flux gels, cross-reactions that can occur when using different activators from different products can now be avoided. Furthermore, the new solar flux gels now presented are EO-S-002, -007 and -009 specially designed for soldering on tin-copper metallizations.
"This metallization is becoming increasingly important in the production of solar modules and will replace the tin-silver metallization used to date. We at Emil Otto are taking this into account and already offer the right product for this development. Our newly developed flux gels are based on the same activators that we use in our previous solar fluxes SOLAR FLUX-EO-S-002, -007 and -009 use. In this way, we avoid unwanted cross-reactions. All gels are non-corrosive flux gels."
FLUX GEL EO-S-002, -007and -009 are highly concentrated and are characterized by high activity, good wetting and distribution. Due to these properties, the gel should be applied sparingly. The gel is applied from a dosing syringe using metal dosing needles. These enable precise and economical application and positioning of the flux. Flux gels can be processed using hot air or soldering irons, reflow, immersion tinning and many other methods.
The basic fluxes are established fluxes that are used in the manufacture of solar modules worldwide. SOLAR FLUX EO-S-002 is a no-clean flux that is formulated to be halogen-free. It leaves no coloring or sticky residues. The activators are specially designed for the higher temperatures required in the manufacture of solar modules without impairing their effectiveness. The same applies to SOLAR FLUX EO-S-007 and -009.
"We are therefore the only manufacturer in the world to offer ready-to-use fluxes and the associated flux gels on an activator basis for solar production."
Emil Otto will be presenting its product portfolio from May 7 to 9 at stand 317 in hall A2 at the Intersolar Europe 2025 in Munich.
SOLAR FLUX GEL EO-S-002
Soldering of solar modules, tabber and stringer material and connecting of cells
No Clean-Flux gel especially for the solar industry
Highly active, halide-free activated (WEEE/RoHS-compliant)
Type ISO-9454: 2231 // DIN EN 61190-1-1 (according to J-STD004): L0 (IPC: ORL0)
SOLAR FLUX GEL EO-S-007
Soldering of solar modules, tabber and stringer material and connecting of cells
No Clean-Flux gel especially for the solar industry
Highly active, halide-free activated (WEEE/RoHS-compliant)
Type ISO-9454: 2231 // DIN EN 61190-1-1 (according to J-STD004): L0 (IPC: ORL0)
SOLAR FLUX GEL EO-S-009
Soldering of solar modules, tabber and stringer material and connecting of cells
No Clean-Flux gel especially for the solar industry
Highly active, halide-free activated (WEEE/RoHS-compliant)
Type ISO-9454: 2231 // DIN EN 61190-1-1 (according to J-STD004): L0 (IPC: ORL0)