Solar Flux – No Clean-Flux-EO-S-022

Solar Flux SMT – EO-S-022

SOLAR-FLUX EO S 022 is a high-performance flux designed to meet the most demanding challenges in photovoltaic soldering. Its “Low Solid Content / Powerful Activation” concept combines the advantage of minimal residue (ideal for glass-glass and bifacial modules) with exceptional activation strength, guaranteeing perfect wetting even on oxidised surfaces or with difficult lead-free alloys. It is particularly well suited to automated production lines where reliability and cleanliness are critical.

Distinctive Advantages:

• Powerful Activation: The highest acid number in the range (17-20 mg KOH/g) ensures maximum soldering efficiency.
• Ultra Low Residue: Solids content kept very low (≤ 2.2%) for perfect compatibility with encapsulants and long term reliability.
• Targeted Performance: Optimised spray flow rate (30-40 ml/min) for precise and economical application.

• Appearance: Transparent, colourless liquid.
• Solids Content: 1.9 – 2.2 %
• Density: 0.793 ± 0.003 g/ml at 20°C.
• Acid Number: 17 – 20 mg KOH/g.
• Solvents: Short chain alcohols (VOC ~98%).
• Flashpoint: 12°C – Flammable product. Store in a cool place, away from flames and sparks.
• Standards: Halide-free, compliant with ISO 9454:2131, DIN EN 61190-1-1 (J-STD-004: ORL0), RoHS, WEEE.

Especially indicated for:

• Soldering cells with a high risk of oxidation or using high melting point lead free alloys.
• Automated stringing/tabbing lines requiring a wide process window and perfect repeatability.
• Manufacturing high quality modules (bifacial, glass glass) where any residue is unacceptable.

Recommended Process Parameters:

• Spray Application (OPS): Begin at 30-40 ml/min with an air flow rate of 18-20 l/min.
• Preheating: Recommended board temperature of 80-110°C. For lead free alloys, a range of 100-130°C is advised.

In summary:

EO S 022 is the premium solution for PV module manufacturers seeking the perfect combination of extreme cleanliness (low residue) and maximum efficiency (powerful activation), all with unmatched stability. It is the flux of choice for critical applications and the most advanced cell technologies.