About Eternal Sun
Eternal Sun is an Energy & Utilities company based in Delft (Netherlands) founded in 2011, and was acquired by Bolster Investment Partners in May 2025. Solar module testing equipment is supplied to the photovoltaic sector. Eternal Sun has raised $2.49 million across 1 funding round from investors including ABN AMRO, Vermec and Bolster Investment Partners. Eternal Sun offers products and services including LED Light Soaker, XENON Solar Flasher, Temperature Controlled Lab Flasher, and Large Area Steady State. Its focus areas include Energy, Solar Energy, Hardware Developer and Testing Equipment.
Company details
Eternal Sun was founded in 2011 and is based in Delft, Netherlands. Equipment for testing solar modules is provided by the company to support quality assurance in the renewable energy industry. Operations are centered on delivering specialized testing solutions for photovoltaic applications, with a focus on reliability and compliance standards. The companys activities serve manufacturers and researchers across Europe and beyond, contributing to advancements in solar technology.
- Headquarters Delft, Netherlands
- Stage Acquired
- SectorsEnergy & Utilities
- Email••••••••
- Website eternalsun.com
- Social LinkedIn X
- Acquired by Bolster Investment Partners (May 2025)
- Total Equity Funding$2.49M (USD)
in 1 rounds
- Latest Funding Round$2.49M (USD), Series A
Dec 2014
- InvestorsABN AMRO
& 2 more
- Acquired by
Products & Services of Eternal Sun
Eternal Sun offers a comprehensive portfolio of products and services, including LED Light Soaker, XENON Solar Flasher, Temperature Controlled Lab Flasher, and Large Area Steady State.
Provides steady-state simulation for laboratory PV testing
Enables flash-based IV testing for manufacturing and labs
Offers precise temperature control for PV performance analysis
Supports testing of mini-modules and multiple samples
Funding Insights of Eternal Sun
Eternal Sun has successfully raised a total of $2.49M through 1 strategic funding round. The most recent funding activity was a Series A round of $2.49 million completed in December 2014. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $2.49M
- Total Rounds 1
- Last Round Series A — $2.49M
- First Round $2.49M
(Dec 2014)
- Investors Count 1
All 1 funding rounds of Eternal Sun with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Dec 2014 | $2.49M | Series A | – | – |
3 investors in total: 3 institutional.
Investors in Eternal Sun
Eternal Sun has secured backing from 3 investors, including venture fund and institutional investors. Prominent investors backing the company include ABN AMRO, Vermec and Bolster Investment Partners.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
| vermec.be | ||||
Private equity firm | bolsterinvestments.nl | Amsterdam, Netherlands | ||
ABN AMRO is recognized as a personal bank in the digital era. | 1991 | abnamro.com | Amsterdam, Netherlands |
Investor details for Eternal Sun
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
Verified entity values are shown only after access is granted.
People of Eternal Sun
28 people are tracked at Eternal Sun (7 in leadership, 21 in team).
| Name | Role | Group |
|---|---|---|
Mark Derks | Director, Finance & Control | Leadership |
Florian van Rijn van Alkemade | CEO | Leadership |
Stefan Roest | CTO & Co- Founder | Leadership |
Pepijn Veling | Sales Director | Leadership |
Sjoerd Lincklaen Arriëns | COO | Leadership |
Bastiaan Bink | Director, QA &QC | Leadership |
Tony Wang | China Operation Director | Leadership |
Erik Bentschap Knook | CCO | Team |
Tijmen Slikker | Application Engineer | Team |
Marcin Rodzik | Applications Engineer, USA | Team |
Ezra Neuteboom | Electrical Engineer | Team |
Alexander Mulder | Principal Engineer | Team |
Alex Goscomb | Customer Service Manager | Team |
Priscilla Lim | HR Manager | Team |
Michael Klootwijk | Elektrisch Ingenieur | Team |
Johan Schalken | Industrialization Manager | Team |
Charis Gaye Dagoc | Sales Manager, MEA, SE Asia & Australia | Team |
Elisa Hsu | Data reporting manager | Team |
Joost Herps | Marketing Manager | Team |
Peter Kageler | Mechanical Design Engineer | Team |
8 more people are available in the full profile.
Complete people profiles for Eternal Sun
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
- Full employee list
- Team structure
- Board tenure
- Professional contacts
Verified entity values are shown only after access is granted.
Timeline of Eternal Sun
4 dated milestones of Eternal Sun across 14 years, from founding to its latest funding, stage changes and deals.
- Founded Eternal Sun is founded.
- Funding First funding round of $2.5M.
- Exit Acquired by Abn Amro.
- Exit Acquired by Bolster Investment Partners.
Web traffic of Eternal Sun
The website of Eternal Sun (eternalsun.com) receives about 3.4K visits a month.
- Monthly visits3.4K
▲ 7.9% vs previous month
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Frequently Asked Questions about Eternal Sun
Eternal Sun was founded in 2011 and raised its 1st funding round 3 years after it was founded.
Eternal Sun is headquartered in Delft, Netherlands. It is registered at Delft, South Holland, Netherlands.
Eternal Sun is a funded company, having raised a total of $2.49M across 1 funding round to date. The company's 1st funding round was a Series A of $2.49M, raised on Dec 2014.
Eternal Sun was founded in 2011 and is based in Delft, Netherlands. Equipment for testing solar modules is provided by the company to support quality assurance in the renewable energy industry. Operations are centered on delivering specialized testing solutions for photovoltaic applications, with a focus on reliability and compliance standards. The companys activities serve manufacturers and researchers across Europe and beyond, contributing to advancements in solar technology.
Eternal Sun offers LED Light Soaker, XENON Solar Flasher, Temperature Controlled Lab Flasher, and Large Area Steady State.
Eternal Sun has 3 investors. Key investors include ABN AMRO, Vermec, and Bolster Investment Partners.
Yes. Eternal Sun was acquired by Bolster Investment Partners in May 2025.