Solar Panel Cleaning On Belgium's Largest Solar Array Video

Solar Panel Cleaning On Belgium's Largest Solar Array Video

Clean Solar Solutions have completed the solar panel cleaning at Belgium’s largest solar array, known as the Sun Mountain. 

Solar Panel Cleaning Zelzate Belgium

The unique 15MW array, owned by NV Terranova, is located on the border of the Belgian municipalities of Zelzate at Evergem, north of Ghent.  The video footage of the clean is below.

Robot Solar Panel Cleaning Belgium

The ‘Sun Mountain’ installation is aptly named, as it consists of 55,000 solar panels covering an area of 20 ha (49 acres) and is the largest solar park in the Benelux region. It was built in one of the most polluted parts of Belgium, on one of the Kuhlmann sites and its capacity is sufficient to supply 4,000 households a year with green electricity.  The site really does look like a solar 'mountain' due to panels being mounted on 3 sides of a huge grass bank.  From ground level, the solar panels seem to go all the way up to the clouds! 

The solar array has been built on a former gypsum deposit and was rewarded with the highest favour of the jury of Intersolar Europe in 2014, praised for being many-sided and part of the large remediation of the entire gypsum deposit in the harbour area. The project 'Terranova Solar', co-developed and co-owned by Envisan and Jan De Nul NV, won an international prize on the prestigious exhibition Intersolar at München, Germany in 2014.

The Terranova Solar consortium, which includes Belgium’s premier dredging companies Deme and Jan De Nul, offered local residents the opportunity to invest in the project via the Zonneberg cooperative. Interested individuals participated with amounts ranging from EUR 100 to EUR 2,500.

Although the solar array is mainly located on the sloped banks of the gypsum dump and is ground mounted, the array design is more like that of a rooftop system. The solar array is uniquely designed, with panels laid out in blocks of 27 x 34 panels in landscape and an 18-degree pitch. This means that manual solar panel cleaning is not able to provide a quality clean at the distances required and tractor cleaning was not even considered to be an option for this kind of array layout either. Robotic solar panel cleaning was the only way of physically accessing the bulk of the centremost panels and would provide a high-quality finish, even on these hard-to-reach areas.

Belgium Solar Panel Cleaning Robot

Although robotic cleaning was the recognised form of solar panel cleaning needed, this was attempted previously with a different design robot to ours, but this was unsuccessful. So, Clean Solar Solutions were called into Belgium to test the cleaning capabilities of our solar panel cleaning robot on this difficult-to-clean solar array. Thankfully, the test clean was a success. We were subsequently contracted for a second trip to Belgium to clean the rest of the solar panels.

Each morning the cleaning team pulled off the main highway towards the site, they could clearly see from half a mile away, which sections of the array had been cleaned and where hadn’t. The difference was so stark. We are very confident that a sizeable increase in output will have arisen due to the cleaning. We look forward to examining the output data before and after the cleaning with the array owners in order to decide upon a cost-effective cleaning frequency.  The next clean has already been booked for May 2019, perfect for the high generation season. 


The first solar panel clean completed on this unique array in East Flanders was a logistical challenge in regard to physically devising a safe workable method of cleaning. Both the solar panel cleaning robot and our office and field-based Clean Solar Solutionists faced the challenge head-on. Clean Solar Solutions proved yet again, that we are up to tackling, not just the toughest solar arrays in the UK, but also in rural Belgium. As a pioneering company, we look to continue our global growth journey and our solar panel cleaning expansion into Belgium is a further sign of the progress we continue to make. No matter what country you reside in, keep your eyes peeled. Clean Solar Solutions could soon be cleaning solar panels near you!

If you are located in Belgium and require a quotation for rooftop or ground mounted solar panel cleaning, bird proofing or electrical maintenance, please contact us.