In order to ensure proper functioning of the website and better browsing experience, also for marketing purposes UAB „Sun Investment Group“ uses cookies. If you consent to the use of cookies, press „I agree“. You can withdraw your consent at any time by changing your browser settings and deleting recorded cookies. For more information please read our Privacy policy .
What are cookies
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
184 MW
Constructed in the United Kingdom, Poland, Lithuania
6 offices
2 in Poland, 2 in Lithuania, 1 in Italy and 1 in Germany
Our focus

We focus on the following key markets

  • Poland
  • Lithuania
  • Spain
  • Italy
  • Germany

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 unites over a 190 of 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 184 MW PV projects development, construction and commissioning.

Deividas Varabauskas

Chairman of the Board

Founder of SIG, working in the solar sector since 2007. Deividas is in charge of strategic planning at SIG. His main focus is on investment product creation, where the detailed understanding of project risks and the needs of investors are fundamental.

Andrius Terskovas

Board member

In the solar business since 2014, Andrius is responsible for the development of new partnerships and project origination at SIG. He holds a track record of managing the €30 million business of a Fortune 100 company and has graduated from Aarhus University with an MSc in Engineering.

Domas Kačinskas

Board Member

Highly skilled investment, development, and management professional with 20 years of experience. For the last years, Domas was CEO of Investment Funds management company. He successfully executed hands-on transactions in the Baltics and Europe, including over €1,5 B in the financing, real estate, private equity acquisitions and divestments, greenfield development of the commercial real estate, and renewable energy projects.

Management team

Rytis Jezepčikas

Global CFO

Lina Žolynė

Global Chief Legal Officer

Torsten Mell

Global Head of Human Resources

Giuseppe D‘Elia

Development Director Italy

Benedikt Peters

Global Head of Procurement

Roksana Malerowicz-Szultka

Head of Greenfield Development Poland

Tomasz Tracz

Head of Greenfield Design and Engineering Poland

Raimondas Mažeika

Global Head of IT

Aidas Ignatavičius

Country manager in Lithuania

Robert Pfatischer

Global Head of Engineering

Michał Koziarewicz

Global Head of Recruitment

Gediminas Januškevičius

Global Head of Mergers & Acquisitions

Agnė Guobužaitė

Global Head of Communication


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 international investors and clients from the manufacturing, logistics, retail, real estate, agriculture, private sectors to guarantee long-term effectiveness and efficient operation.

Visit website
Eternia Services

Eternia Services provides comprehensive engineering services: primarily design, yield assessment, executive design, as-built documentation. The team of professionals takes care of revamping systems to optimize yields, construction supervision on behalf of investors, and providing the highest quality operations and maintenance services to ensure the highest availability.

Saulės Bendruomenė

Saulės Bendruomenė develops, constructs, and maintains large-scale solar parks across Lithuania, allowing both B2B and B2C clients to purchase solar energy remotely. The experienced team ensures the high-quality execution of each project and guarantees successful green energy production for remote solar energy prosumers.

Visit website

Get in touch

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.