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About us

Changing the
game of solar

Sun Investment Group (SIG) is a development and investment management company, focused on delivering steady quality in the rapidly evolving solar energy industry.

Our reach

Solar opportunities
are boundless

In-house experts
132 MW
Constructed in the United Kingdom, Poland, Lithuania
5 offices
3 in Poland, Lithuania and Italy
Our focus

We focus on the following key markets

  • Poland
  • Lithuania
  • Spain
  • Italy

And we have the following core business divisions:

  • Utility Scale project development & operation
  • C&I PPA project development & operation
  • EPCm (construction management) for in-house projects only

Together SIG and its companies form one of the most dynamic company groups dedicated to solar PV technology in Europe, led by the founders with over 10 years of experience in the market.

Business model

  • Utility
  • Commercial


Development, greenfield development and design, securing connections, permitting and PPA greenfield development.


Structuring and sourcing project finance.


EPC management, using SIG's experience and warranty strength with trusted networks of contractors.

Project development

Feasibility study – technical, economic and legal analysis; development.

Design and construction

Turnkey solution (EPC) – formalities, design and construction.


Tailored financial solutions.

Operation and Maintenance (O&M)

Optimisation, 24/7 monitoring, maintenance, insurance and guarantees.
The opportunity
The approach
The gain
Our philosophy

The opportunity

Our focus is on plants in regions whose political stability, legal framework, and existing energy and environmental policies guarantee a stable source of revenue in the long term.





Dynamic, ambitious, experienced

Established in 2017, SIG team currently includes 97 in-house international experts with a broad and proven experience in diverse areas of the solar energy business, particularly in the project development, financial structuring, legal, and EPCm. The team holds a track record of 132MW PV projects development, construction and commissioning.

Management team


Stronger together

SIG is part of a company group that unites the most ambitious and experienced solar experts in Europe.

Eternia Solar

Eternia Solar is one of the biggest solar engineering, procurement, and construction providers in the Baltics. The company works closely with clients from the manufacturing, logistics, retail, real estate, agriculture, and the private sectors to guarantee long-term effectiveness and efficient operation.

Visit website

Nogrid is a B2C solar solutions provider with a track record of more than 500 projects in the Baltics. The company partners with the leading PV technology manufacturers to bring cutting edge solutions for its customers.

Visit website
Saulės Bendruomenė

Saulės Bendruomenė is a group’s joint project offering remote solar solutions in Lithuania. It allows energy consumers cover their electricity costs with the power produced by Saulės Bendruomenė‘s power plants.

Visit website

Get in touch

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