Solet Photovoltaics module production line

Solet monocrystalline photovoltaic modules are manufactured by scientific industrial company Solet. More than 50 years of experience in precision engineering and more than a decade in photovooltaic technology development. Precizika (now Solet) launched the first photovoltaic module production line in the Baltic States, using the innovative technology from the Meyer Burger Group.

Glass washing and drying

No reagents are used during the process

An Italian Triulzi horizontal washing and drying machine wash the glass in two stages – initial washing and cleaning.

  • Reverse-osmosis filtering is used for water purification and softening
Italian glass washing and cleaning machine in solet photovoltaics solar module factory
Solet Photovoltaics Automatic solderinig and lay-up equipment in solar modules factory

Automatic soldering and lay-up

Safely forms even the most sensitive photovoltaic cells into perfect strings

German Somont cell connecting soldering technology safely forms even the most sensitive photovoltaic cells into perfect strings.

  • “Soft-touch” soldering technology
  • Soldering temperature (220-250 °C, depending on the soldering type and solar panel) is increased and reduced step-by-step to avoid damage from rapid temperature change
  • Soldering tolerance ±0.5 mm
  • Soldering quality checked by visual monitoring cameras
  • Fully automated string lay-up into a matrix


Swiss accuracy ensured by Meyer Burger Group equipment

The 3-chamber 3S Swiss Solar system (Meyer Burger Group) machine ensures precise laminating process of the PV module layers into one durable unit.

  • Laminating area up to 3.6 m X 2.2 m
  • Laminating temperature variance ±1 °C
  • Gradual cooling process: modules leave the lamination area at 18°C
Solet Photovoltaics module laminating machine solar modules factory in Vilnius, man laminating modules
Solet Photovoltaics laminating machine in solar module factory, Vilnius


German Minitec framing station ensures precise laminating process

A semi-automatic German Minitec framing station frames the PV modules with anodized aluminum frames that prevent environmental impact.

  • Frames are covered with protecting film to avoid damage during the assembly
  • Two different frame connection types: fishbone or crimping


One of the most important stages of the production process

The solar modules have valid quality-confirming TUV certificates – IEC61730, IEC 61215 and IEC 62716*. Stress and processing tests are performed at the completion of each manufacturing step.

  • Visual glass check after washing for every module
  • Dark current measurement testing for every module
  • High Potential testing (adding 3.6 kV voltage) for every fifth module
  • Power measurement testing for every module with Sun Simulator at 0+2.5 % tolerance
  • pulse duration: 10 ms
  • non-uniformity of irradiance ≤ 1%
  • spectral irradiance distribution ≤ ±12.5 %
  • stability 1.0 %
  • uncertainty of solar simulator power measurement results 1%
  • Sun Simulator testing with Swiss Pasan Measurement Systems technology for every module
  • Electroluminescence procedure to identify any micro cracks, finger defects or malfunctioning parts of solar cells, invisible to the naked eye, for every fifth module
  • Visual check to find any misalignment possibilities, bubbles or other visual defects for every module
  • Soldering peeling test (Solet reaches 4-6 N value, while the standard is > 2.5 N) carried out twice per day
  • Weekly Gel Content test (Solet reaches 88-90 %, while the standard is 75 %)
  • Weekly EVA-back sheet peeling test
  • Weekly EVA-glass peeling test (Solet reaches 120-250 Nm, while the standard is > 60 Nm)


* Solet Standard line modules

Solet Photovoltaics

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