A marina is really several energy-hungry businesses sharing one site: a berthing operation, a workshop, a hoist yard, usually a chandlery and a café, and increasingly an EV and electric-boat charging point. Every one of those loads draws power in daylight, and almost all of them peak in the months when the sun is strongest. That combination is why solar panels for marinas and boatyards stack up unusually well, and why coastal operators are among the businesses seeing the fastest returns on commercial solar.
Why a marina’s energy profile suits solar
Solar pays best when the electricity is used on site rather than exported cheaply to the grid. Marinas and boatyards are close to a textbook fit.
Start with the yard. Travel hoists and boat lifts, pressure washers, compressors, workshop machinery, extraction and spray booths all run during working hours — the same hours an array is producing. Lift-out and lift-in seasons concentrate that demand into busy blocks rather than spreading it thinly overnight.
Then there is shore power. Pedestals serving berth holders draw steadily through the day, and that draw is growing: liveaboards, larger onboard systems, electric and hybrid tenders and, in some marinas, electric boat charging. Whatever the metering arrangement with berth holders, the site itself is importing those units from the grid, and every unit generated on the roof is one fewer bought at commercial rates.
Add the buildings. Chandlery lighting and refrigeration, café catering and fridges, office IT, washrooms and showers, security lighting and CCTV. Refrigeration in particular never switches off, and its hardest work happens on hot afternoons — precisely when generation peaks.
The seasonal match is the part operators often underestimate. Your busiest, most power-hungry months are April to September. So are your sunniest. Unlike a factory with flat year-round demand, a marina’s load curve leans into the generation curve rather than fighting it.
Roofs, sheds and salt air
Boatyards tend to have exactly the roof space solar wants: large, simple spans over storage sheds, workshops, dry stacks and undercover repair bays, usually low-rise and unobstructed, with open southerly aspects and very little shading from surrounding buildings.
Coastal sites do need a design that respects the environment. Salt-laden air and wind exposure mean mounting systems, fixings and enclosures should be specified for marine conditions, and wind loading calculations matter more than they do inland. None of this rules out solar — it simply means the design should come from someone who has installed on coastal commercial sites before.
It is worth checking planning early, too. Most commercial rooftop solar is straightforward, but harbourside sites sometimes sit within conservation areas or protected landscapes, and designing with that in mind from the start avoids delays later.
Realistic savings and payback
For a commercial system sized around genuine daytime consumption, a 40–70% reduction in electricity bills is typical, with payback usually falling in the three-to-five-year range. After that the array keeps producing for decades — panels installed today are generally warrantied to still be performing strongly at 25 years.
Battery storage sharpens the case further on sites with long operating hours. A battery banks surplus midday generation and releases it in the evening, covering security lighting, refrigeration and shore power after the yard has closed, rather than exporting those units at a low rate.
We size systems from your actual half-hourly consumption data, opening hours and roof area — not from a rule of thumb. A yard with a travel hoist and a busy workshop has a very different profile from a berthing-only marina, and the design should reflect it.
No upfront cost: the fully funded route
Most marina operators would rather spend capital on pontoons, dredging or a new hoist than on a roof. A fully funded arrangement removes that trade-off. A funder pays for the system and its installation, and you buy the electricity it generates through a power purchase agreement (PPA), typically at a rate below what you currently pay the grid. No capital outlay, and savings from the first month.
DES delivered exactly this for Leek Town FC: a fully funded 46.8kWp array paired with 69kWh of battery storage, at no upfront cost to the club. The model translates well to marinas, where predictable, seasonal-but-substantial demand is exactly what makes a PPA work for both parties.
Our work on marine and coastal sites
DES has delivered solar for businesses working on and around the water. We installed a 110.67 kWp rooftop system with EV charging for global yacht transporter Peters & May in Eastleigh, and a 27.9 kWp solar and battery system for the Underwater Explorers dive centre in Portland, on one of the most exposed stretches of the Dorset coast. You can read our wider guide to commercial solar for UK businesses for how the numbers are put together.
Why choose DES Renewables
DES Renewable Energy is a commercial solar installer based in Wimborne, Dorset, working with businesses across the South Coast and further afield. Our installations are MCS accredited, and we hold NAPIT, RECC and City & Guilds qualifications — the credentials that matter for electrical safety, workmanship and consumer protection on commercial projects, and the ones funders and insurers look for.
We handle the whole job: site survey, system design, DNO application where required, installation and commissioning — scheduled around your lift-out programme and peak season so the yard keeps working.
Find out what your site could save
The honest starting point is your bills. Our free business energy bill check reviews your current usage and costs and gives you a realistic picture of the savings and payback solar could deliver at your marina or boatyard — with no obligation.
Request your free bill check online, email madeleine@desrenewables.com, or call the team on 01202 985 888. We will tell you straight whether solar suits your site, and how a fully funded option could get you there with no upfront cost.