What Eternia Solar does

Eternia Solar is a Lithuania-headquartered solar engineering, procurement, and construction (EPC) company providing turnkey photovoltaic installations for commercial, industrial, and public-sector clients across Central and Eastern Europe. The company operates as the construction arm of Sun Investment Group (SIG), a renewable energy project development group developing more than 2.7 GW of capacity across Lithuania, Poland, Italy, and Cyprus; SIG-owned projects are channeled to Eternia as general contractor, while the company also pursues independent C&I and public-sector work directly.

The product portfolio spans five physical PV solution types — ground-mounted (freefield), rooftop, floating, energy storage, and EV charging — supported by a full service layer of engineering, procurement, construction, and operations & maintenance (O&M) that can be booked either bundled as EPC or standalone. Technology stack relies on established third-party suppliers: SolarEdge inverters (as official reseller), Risen modules, Sungrow inverters, and bifacial modules for higher energy yield. ISO 9001/14001/45001 certifications support enterprise and public procurement qualification.

Eternia generates revenue primarily through project-based EPC contracts (one-time), supplemented by recurring O&M subscriptions for installed assets and, increasingly, project financing via bond issuance (notably EUR 4.4M oversubscribed and a follow-on EUR 3.6M tranche for a 120 MW Poland solar park). Customer base spans manufacturing (Retal, Glass LT, Sakuona, Klaipėdos baldai), retail (Lidl Lietuva), energy/utilities (Ignitis, Amber Grid), real estate (EIKA), healthcare, education, and government. The company employs 40+ staff across offices in Vilnius, Warsaw, and Munich.

Name

Eternia Solar

Legal name

Eternia Solar

Website

https://eterniasolar.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

1–10 employees

Short description

Eternia Solar is a Lithuanian-headquartered solar EPC contractor delivering turnkey photovoltaic installations — ground-mounted, rooftop, floating, storage, and EV charging — to commercial, industrial, and public-sector clients across Central and Eastern Europe.

Ownership category

akta.pro rank

Product category

Solar EPC Services

akta.pro primary industry

Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)

akta.pro secondary industries

Utility-Scale PV EPC (Engineering, Procurement & Construction) (EUACAGAB), Solar PV Power Plant EPC (Utility-Scale) (EUAEAAAG)

Keywords

• Solar EPC services
• Commercial solar installation
• Photovoltaic construction
• Renewable energy engineering
• Solar project development

Headquarters

HQ city

Vilnius

HQ country

Lithuania

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. EPC Contracts: Engineering, procurement, and construction services for solar PV installations. The company designs, procures equipment for, and constructs solar power plants for commercial and industrial clients. Revenue is generated through project-based contracts.
2. Operations & Maintenance (O&M) Services: Ongoing technical asset management, monitoring, and maintenance services for installed PV systems to ensure long-term performance and longevity.
3. Bond Issuance for Project Financing: The company issues bonds to finance construction of large-scale solar projects. Recent issuance of up to EUR 8 million for 120 MW solar park in Poland.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Eternia Solar is a solar Engineering, Procurement, and Construction (EPC) company that designs, procures equipment for, and builds photovoltaic (PV) power plants for commercial, industrial, and public-sector clients, and then provides ongoing operations and maintenance. Its offerings span ground-mounted, rooftop, floating, storage, and EV-charging solar solutions across Lithuania, Poland, and the broader CEE region.

Product overview

Eternia Solar operates as a comprehensive solar EPC (Engineering, Procurement, Construction) company offering a full scope of services from project conception through operations and maintenance. The company's product portfolio centers on five core PV solution types: Freefield/Ground-mounted solar systems, Rooftop solar installations, Floating solar systems, Energy Storage solutions, and EV Charging infrastructure. These are complemented by a comprehensive service layer including Engineering, Procurement, Construction, and Operations & Maintenance services. The company serves commercial and industrial clients across Lithuania, Poland, and other European markets, providing both turnkey installation solutions and standalone services. As part of Sun Investment Group, Eternia Solar also develops remote solar parks enabling businesses without suitable properties to access solar energy.

Differentiator

Problem solved

Functional benefit

Products and services

• Freefield Solar Systems Ground-mounted solar PV systems and remote solar parks designed for commercial and industrial clients, offering the lowest Levelized Cost of Energy (LCOE) and long-term stable income generation.
• Rooftop Solar PV Systems Rooftop-mounted solar PV systems installed on commercial building rooftops that convert unused roof space into an on-site energy-generating asset.
• Floating Solar Systems Floating PV systems deployed on unoccupied water surfaces, enabling solar generation where land or rooftop space is not available.
• Energy Storage Solutions Solar battery systems providing grid services such as peak shaving and energy shifting, designed to be combined with on-site renewable energy assets.
• EV Charging Solutions Green-energy-powered electric vehicle charging infrastructure for businesses, enabling sustainable transportation using on-site or remote solar generation.
• Remote Solar Parks Off-site solar park solutions for businesses that do not own suitable roofs or land for on-site installation, providing access to remotely generated solar energy.
• Engineering Services Engineering services for solar projects including yield assessments, executive design, and technical supervision; bookable as a standalone service.
• Procurement Services Equipment procurement services leveraging long-term supplier relationships to guarantee successful solar project implementation; bookable separately.
• Construction Services Full-scope solar PV construction services including HSE and quality management and site reporting; available as a standalone service.
• Operations and Maintenance (O&M) Services Professional technical asset management and maintenance of installed PV systems, including monitoring, technical asset management, and maintenance sub-services to ensure long-term performance.

Quantifiable outcome

• Savings of over EUR 45,000 per year for Amber Grid with 1.5 MW installations
• +5 more outcomes

Named customers12 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Two partnerships are on record, tiered core.

• Sun Investment Group (SIG)coreStrategic or Co-development PartnerSun Investment Group is the parent company and leading renewable energy project development group in Central and Eastern Europe. Eternia Solar serves as the construction contracting entity for SIG's solar projects. The group has projects with total capacity exceeding 2.7 GW across Lithuania, Poland, Italy, and Cyprus.
• SolarEdgecoreTechnology or IntegrationOfficial reseller of SolarEdge inverter technology, providing optimized solar inverter systems for enhanced PV performance.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• European Energy: Danish-headquartered renewable energy developer and EPC operating across Europe including CEE markets. Comparable business model as a developer-EPC; significantly larger scale but the most relevant competitive peer for utility-scale solar tenders in Poland and the Baltics.
• Solarpro: Bulgarian solar EPC and developer active across the CEE region, focused on utility-scale and commercial PV. Closely comparable operating model and regional focus to Eternia, including bond-funded project finance and SIG-adjacent pipeline.
• IBC Solar: German-headquartered solar EPC and equipment distributor serving C&I and utility-scale clients across Europe. Most directly comparable peer to Eternia in terms of full-scope PV EPC service offering and European geographic footprint.
• Energia Csoport: Hungarian solar EPC active in CEE. Comparable regional EPC services business targeting utility-scale and C&I projects in adjacent CEE markets.

Broad incumbents

• Sonnedix: Pan-European solar independent power producer with operations across multiple European markets. Comparable as a European solar developer-EPC with focus on operational solar assets.
• Lightsource bp: Global utility-scale solar developer and EPC backed by bp, with significant European operations including Poland. Larger and broader incumbent competing for the same utility-scale tenders that feed SIG's pipeline.
• Enel Green Power: Global utility-scale renewable developer and EPC with deep European footprint. Sets the competitive ceiling on pricing and execution expectations for any European solar EPC tender.
• BayWa r.e. German-headquartered global renewable energy developer, EPC and distributor with significant European solar operations. Comparable as a full-scope solar EPC competitor with deeper balance sheet.

Others

• Sun Investment Group (parent): Eternia's parent company and primary project pipeline source; while not a market peer in the competitive sense, SIG's project portfolio directly drives Eternia's revenue and is the single most relevant commercial counterparty for forward planning.

Emerging players

• Colossus Energy Group: Emerging European solar developer-EPC focused on CEE markets. Comparable stage and operating geography to Eternia and a likely competitor for utility-scale Polish tenders.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Eternia Solar