Top 10 Best Solar Energy Companies in South Holland

Solar Power in South Holland

The Netherlands has become one of Europe's solar success stories, with millions of homes and businesses generating their own electricity. South Holland, the most densely populated province, has enormous potential on rooftops, industrial buildings, greenhouses and even on water. The Westland greenhouse region, the extensive warehouses in the Rotterdam port area and the flat roofs of offices and homes across The Hague, Leiden and Dordrecht all offer valuable space for solar panels.

At the same time, the province is a centre for solar innovation. Companies and research groups in The Hague, Leiden and Delft are developing new module technologies and offshore solar systems that could transform how solar power is generated in the future.

How We Selected These Companies

We considered companies that manufacture, install, develop or innovate in solar energy and have a meaningful connection to South Holland. Criteria included quality, innovation, customer satisfaction, scale and contribution to the regional energy transition.

The Top 10 Solar Energy Companies in South Holland

1. Exasun

Exasun, based in The Hague, is one of the few solar module manufacturers in the Netherlands. It produces high-quality glass-glass solar panels and integrated solar roofing systems that combine aesthetics with performance. Its local production and focus on durability make it a standout choice for homeowners and builders seeking premium solutions.

2. Oceans of Energy

Oceans of Energy, based in Leiden, is a pioneer in offshore solar. It developed one of the world's first offshore solar farms in the North Sea, demonstrating that solar panels can withstand harsh marine conditions. Its work opens the door to combining offshore solar with wind farms.

3. SolarDuck

SolarDuck develops floating offshore solar platforms designed for rough sea conditions. Its triangular platform design raises panels above the waves, and the company is working on projects that integrate offshore solar with wind parks, helping maximise the use of marine space.

4. Solarplaza

Solarplaza, based in Rotterdam, is an international organiser of solar industry events and knowledge platforms. It connects developers, investors, manufacturers and policymakers, contributing significantly to the growth of the solar sector in the Netherlands and beyond.

5. Eneco

Eneco, headquartered in Rotterdam, develops solar parks and offers solar solutions for businesses and households. It combines solar generation with energy supply and storage services, making it easier for customers to integrate solar into their energy use.

6. Greenchoice

Greenchoice supports solar projects developed by energy cooperatives and local communities. Through its cooperative approach, residents can participate in shared solar projects even if they cannot install panels on their own roofs.

7. Zonneplan

Zonneplan is a popular Dutch solar installer and energy supplier that serves many households in South Holland. It offers solar panels, home batteries and a dynamic energy contract, helping customers maximise the value of their solar production.

8. Sunrock

Sunrock specialises in large-scale rooftop solar installations on commercial and industrial buildings. Logistics centres and warehouses in the Rotterdam region are ideal candidates for its model, which allows companies to use their roofs for solar generation without upfront investment.

9. GroenLeven

GroenLeven is a leading Dutch developer of solar parks, including innovative floating solar farms on lakes and agri-solar projects. Its experience with large-scale projects makes it an important contributor to the country's solar capacity.

10. TU Delft Photovoltaic Materials and Devices Group

The Photovoltaic Materials and Devices group at TU Delft is a world-renowned research team working on next-generation solar cell technologies, integration of solar in buildings and vehicles, and system optimisation. Its research and spin-offs strengthen South Holland's position in solar innovation.

Solar Trends in South Holland

Rooftop solar continues to grow, but grid congestion in parts of the province means that batteries and smart energy management are becoming increasingly important. The phase-out of the Dutch net metering scheme is encouraging households to use more of their solar power directly. Businesses are adopting solar carports and combining solar with electric vehicle charging. In the Westland, greenhouse growers are exploring solar solutions that balance energy generation with light requirements for crops. Offshore and floating solar are emerging as promising solutions for a country with limited land.

Benefits of Solar Energy

Solar panels reduce energy bills, increase property value and lower carbon emissions. For businesses, solar contributes to sustainability goals and can provide protection against volatile energy prices. Combined with a home battery or smart energy management system, solar can significantly increase energy independence.

Choosing a Solar Company

Look for installers with recognised quality certifications, strong reviews and clear warranties on both panels and installation. Ask about expected yield, the quality of inverters and whether battery storage makes sense for your situation. For larger installations, check grid connection availability early, as capacity constraints can affect project timelines. Compare offers not only on price but also on panel quality, service and long-term support.

Conclusion

South Holland combines strong demand for solar with world-class innovation. From module manufacturer Exasun and offshore pioneers Oceans of Energy and SolarDuck to installers like Zonneplan and Sunrock, the province offers excellent options for anyone looking to harness the power of the sun.