Best Solar Energy Companies in South Holland, Netherlands
The 31 best Solar Energy companies in South Holland, Netherlands in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: SolarDuck.
Our analysis of 100 Solar Energy companies
$30.5b in tracked funding; 83% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Solar Energy companies in South Holland
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SolarDuck Developer of solar energy projects | $17M | 34 mo ago | Series B | Don Hoogendoorn CTO & Co-Founder | 2018 | WordPressMySQLPHP+20 | — | — |
| 2 | Exasun Solar PV glass roofs and facades producer | $9M | 49 mo ago | Series C | — | 2012 | — | 16 patents Building-integrated modular photovoltaic systems for roofs and facades | — |
| 3 | Solar Monkey Provider of solar planning and designing services | $4M | 49 mo ago | Series A | — | 2014 | WordPress Block EditorWordPressMySQL+29 | — | — |
| 4 | Eternal Sun Solar module testing equipment supplier | $2M | 143 mo ago | Acquired | — | 2011 | WordPressMySQLPHP+21 | 7 patents Photovoltaic module testing and manufacturing equipment, especially solar simulators. | — |
| 5 | Supersola Manufacturer of portable plug & play solar PV systems | $1M | 42 mo ago | Acquired | Julius Smith Founder & CEO | 2016 | Cart FunctionalityShopifyBootstrap+23 | 4 patents Innovative mounting and support structures for photovoltaic solar panels | — |
| 6 | Solho Provider of design, engineering, and project development services for solar energy | $622K | 44 mo ago | Seed | Emiliano Casati Co-Founder | 2017 | — | — | — |
| 7 | SolarSwing Provider of solar-based products for use in buildings | $391K | 93 mo ago | Seed | Sam Kin Founder | 2011 | — | — | — |
| 8 | Oceans of Energy Developer of offshore floating solar systems | $353K | 62 mo ago | Seed | Allard Hoeken Founder & CEO | 2016 | WordPressMySQLPHP+15 | 14 patents Floating pontoon platforms for marine renewable energy and solar array deployment | — |
Top 10 Solar Energy companies in South Holland
#1
Series B · Rotterdam, South Holland · founded 2018 · 27 employees$16.5Mraised▾
Developer of solar energy projects
- Dec 2023Series B$16.5M
#2
Series C · Zuidland, South Holland · founded 2012 · 35 employees$9Mraised▾
Exasun is a Dutch solar PV producer of Glass-Glass solar modules with high efficiency and lifespan. It offers three products Black Glass for flat roofs, sloped roofs, and solar parks, Black Roof - a waterproof solution for complete building integration, and Black Facade an invisible mounting facade system.
- Sep 2022Series C$9M
- Jun 2018Series B—
#3
Acquired · Delft, South Holland · founded 2016 · 7 employees$1.1Mraised▾
Manufacturer of portable plug & play solar PV systems
- May 2023Seed$1.1M
#4
Series A · Zuidland, South Holland · founded 2014 · 73 employees$3.9Mraised▾
Provider of solar planning and designing services
- Sep 2022Series A$3.9M
- Sep 2020Grant (prize money)$363.9K
#5
Seed · Delft, South Holland · founded 2017 · 6 employees$621.6Kraised▾
Developer of a solar off-grid energy system designed to power horticultural projects and facilitate the energy transition. The company's system uses solar energy and seawater to provide the necessary inputs for greenhouse horticulture projects, enabling institutions to overcome the current barriers of poor and unreliable energy infrastructures.
- Mar 2023Seed$621.6K
- Dec 2018Grant (prize money)$57.2K
- Jul 2018Grant (prize money)$58.4K
#6
Seed · Katwijk Aan Zee, South Holland · founded 2016 · 37 employees$353Kraised▾
Developer of offshore floating solar systems
- Sep 2021Grant (prize money)$8.4M
- Jan 2020Grant (prize money)$373.9K
- Jun 2018Seed$353K
#7
Acquired · Delft, South Holland · founded 2011 · 227 employees$2.5Mraised▾
Solar module testing equipment supplier
- Dec 2014Series A$2.5M
#8
Seed · Delft, South Holland · founded 2011 · 1 employees$390.8Kraised▾
Provider of solar-based products for use in buildings. Their current product called SolarSwing Reflect is an interior shading system that consists of transparent vertical blinds. The blinds reflect all direct sunlight, while diffuse daylight is fully transmitted. Their upcoming product called SolarSwing Energy is a transparent solar panel that converts direct sunlight into electricity and usable heat, while all diffuse daylight gets transmitted into the building.
- Feb 2019Grant (prize money)$57.3K
- Jan 2015Grant (prize money)$333.5K
- Mar 2013Seed—
#9
Acquired · Waddinxveen, South Holland · founded 2011 · 130 employees—raised▾
Rooftop Energy is a developer of distributed rooftop solar energy projects for residential customers. The company covers the entire cost of installation and commissioning on itself and charges a customer a fixed regular amount depending upon annual consumption. The fixed amount is adjusted from time to time (annually) to account for variability in market development.
- Aug 2016Conventional Debt—
#10
Funding Raised · Bleskensgraaf, South Holland · founded 2005—raised▾
Manufacturer of solar PV modules
- Oct 2012Grant (prize money)—
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Solar Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Solar Photovoltaics is moving in the Netherlands
A read on the academic research around Solar Photovoltaics — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 529 Netherlands-affiliated papers.
- Delft University of Technology98
- Eindhoven University of Technology77
- Institute of Physics70
- University of Twente38
- Joint Research Centre38
- Photovoltaic system2→22
- Solar cell4→21
- Optoelectronics9→24
- Perovskite (structure)4→15
- Solar energy2→11
- Photovoltaic system6→56
- Solar energy2→33
- Renewable energy2→29
- Solar cell14→33
- Perovskite (structure)6→20
- Solar energy4→23
- Photovoltaic system3→22
- Renewable energy3→17
- Solar cell2→8
- Perovskite (structure)2→6
Where solar pv is researched across Netherlands
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.