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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
131 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 largest dedicated to solar PV technology company groups in Central Europe and the Baltics with over 10 years of experience.

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.

O&M and AM

Operation and maintenance, asset management service, reporting.

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 2011, SIG team includes in-house international experts with a broad and proven experience in diverse areas of solar energy business, particularly in the project development, financial structuring, legal, EPCm, O&M and asset management. Team holds a track record of MW PV projects development, construction and commissioning.

Management team

Get in touch

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