Solarday (a trademark by Business Partner srl)


  • C1.335

+39 02 2594171

Via Antonio Meucci 67
20128 Milano, Italy

Product Groups

  • Crystalline modules
  • Inverters
  • Energy storage systems for residential buildings
  • Lithium-based batteries
  • Power electronics for storage systems
Floor plan

Solarday has been the first Italian manufacturer of photovoltaic panels for years, always characterized by its top quality and reliability. Made in Italy monocrystalline and polycrystalline solar panels production restarted in an Italian primary manufacture, which can guarantee advanced and high performing products. Business Partner, which has acquired ownership of the brand, produces and exclusively sells the entire line of Solarday photovoltaic panels.We are a group of professionals who decided to put together their working knowledge in order to create a lean and responsive organization capable to catch the best market opportunities turning them into solutions for its customers.


In 2018 a new integrated production line has been installed providing to increase the declared production capacity from 80MW to 200MW. The line is composed of a new generation stringer able to realize approximately 80 modules per hour (calculation based on 60 cell modules) and with a new laminator that allows to process all quantities produced. The new line includes 16 different control stations during the production of the module that can guarantee a hi-quality and extend the module warranty on manufacturing defects up to 20 years. It is possible to verify for each module the real presence of microcracks in every photovoltaic cells before using them thanks to the high level of automation. The company took actions with certification agencies to promote a power boost of the product range in order to optimize the photovoltaic plants efficiency based on the real available space.


Strengths of Solarday modules are: hi-quality prime materials and production 100% made in italian facilities.