A coastal installation is one close enough to the sea for salt air and wind exposure to shape the design. In East Sussex that covers a lot of homes, because the county is a long coastline with towns sitting right on it.
Solar works well here. The point of this article is not to warn you off. It is to explain the extra things we look at on a seafront roof, and why the survey takes those things seriously.
Key Points
- Salt air is the first consideration. It affects fixings and exposed components, so we use corrosion resistant fixings and components on coastal roofs.
- Wind exposure is the second. An exposed roof near the front is a different job from a sheltered roof half a mile inland.
- Cable routes are checked at survey. Where a cable runs, and how it is protected, matters more on an exposed elevation.
- Roof access is checked at survey. Narrow seafront streets, tall terraces and shared frontages all change how scaffolding goes up.
- The equipment itself is rated for outdoor use. The Fox ESS batteries and inverters we fit are rated IP65, and the Anker SOLIX X1 units are rated IP66.
- Gulls are part of coastal life. Bird fouling is the type of soiling worth acting on, unlike light dust.
- Permitted development rules are the same at the seafront as inland. The 0.2 metre projection limit and the roof height condition apply where Class A permitted development applies. Listed buildings are excluded, and conservation areas and article 2(3) land carry extra conditions.
Common Misconceptions
"You cannot have solar near the sea." You can. We have published work in Bexhill, Hastings, St Leonards and Eastbourne.
"Salt air will destroy the panels in a few years." Modules are sealed glass units built for outdoor life. The makers publish decades long performance warranties.
"A seafront roof needs a special panel." What changes is the fixings, the exposed components, the cable routes and the access plan. The panel model usually does not.
"Wind means fewer panels." Not necessarily. It means the layout and the fixing detail are worked out for that roof rather than copied from another one.
"Sea mist ruins the output." Low cloud reduces output while it is there and then it clears. It is weather, not a fault.
Real-World Advice
We have published coastal work in four towns.
| Project | Town | Panels | Array size | Battery |
|---|---|---|---|---|
| 8-panel-solar-installation-bexhill-on-sea | Bexhill on Sea | 8 | 3.76 kWp | 5 kWh Anker |
| 12-panel-solar-installation-hastings | Hastings | 12 | 5.52 kWp | 10 kWh Anker |
| 13-panel-solar-installation-hastings | Hastings | 13 | 6.18 kWp | 10 kWh Anker |
| 20-panel-solar-installation-st-leonards-on-sea | St Leonards on Sea | 20 | 9.20 kWp | 10 kWh Anker |
| 10-panel-solar-installation-eastbourne | Eastbourne | 10 | 4.60 kWp | 5.76 kWh Fox ESS |
| 15-panel-solar-installation-eastbourne | Eastbourne | 15 | 7.12 kWp | 10 kWh Anker |
| 18-panel-solar-installation-eastbourne | Eastbourne | 18 | 8.46 kWp | 10 kWh Anker |
The Bexhill job is 8 Jinko panels on a small roof with the smaller of the two battery sizes we fit most often. The 13 panel Hastings job used Aiko A475 panels. The customer described it as a slightly different installation that had to work from day one. The St Leonards job used 20 JA Solar panels and was designed to make comfortably more than the household uses.
The range there is the point. Coastal does not mean small. It means the design starts from the roof in front of us.
UK-Specific Considerations
Eastbourne, Hastings, St Leonards, Bexhill, Seaford and Newhaven all sit on or very near the sea. Pevensey Bay and Normans Bay are more exposed again.
Property types vary a lot along that stretch. Victorian and Edwardian terraces near the front in Eastbourne and St Leonards. Bungalows and dormer bungalows around Little Common and Cooden. Split roofs and chimneys on the Hastings slopes. Each of those changes the access plan more than it changes the panel choice.
Planning is handled by different councils along the coast. Eastbourne Borough Council covers Eastbourne. Rother District Council covers Bexhill and the Hastings fringe. Lewes District Council covers Seaford and Newhaven. Wealden District Council covers Polegate, Hailsham and the inland villages. Most roof mounted domestic solar is permitted development, but conservation areas and listed buildings are common along a seafront, and both are exceptions.
Bird protection is a genuine coastal issue rather than a sales line. Gull mess sits on the glass and does not rinse away like road dust does. See our solar bird protection service.
When This Isn't Right For You
A roof in poor condition should be dealt with before panels go on it, and that applies more strongly on an exposed elevation. Do not put a twenty five year system on a covering that has a few years left.
If your property is listed, roof mounted solar is outside permitted development and needs consent first.
Before You Spend Money
Ask whether the survey included the exposure of your roof, not just its size and direction.
Ask what fixings and components are being used on your roof, and confirm they are corrosion resistant.
Ask where the cables will run and how they will be protected.
Ask how the scaffolding will be put up, and whether the street needs any permission. On a narrow seafront road this is worth settling early.
Ask whether bird protection is being quoted, and whether you want it from day one.
Ask about conservation area status if you are near the front. Your council can confirm it.
Frequently Asked Questions
Q: Does salt air shorten the life of a solar system?
A: It is a factor we design for. We use corrosion resistant fixings and components on coastal roofs, and the inverters and batteries we fit are rated for outdoor use.
Q: Is a coastal install more expensive?
A: Not automatically. Cost usually follows access and scaffolding more than it follows the sea.
Q: Do panels need cleaning more often at the coast?
A: Bird fouling is more common, and that is the type worth removing. Light dust is handled by rain in this climate.
Q: Will wind pull the panels off?
A: The fixings and layout are chosen for the roof. That assessment is part of the survey, and an exposed roof is not treated like a sheltered one.
Q: I am in a conservation area near the seafront. Can I still have solar?
A: Usually yes on a roof slope, but there are conditions, and walls fronting a highway are treated differently. Check with your council before you order.
Summary
Coastal roofs in East Sussex take solar well. What changes is the detail. Salt air means corrosion resistant fixings and components. Wind exposure means the layout and fixings are worked out for that roof. Cable routes and roof access are checked at the survey, not on install day. Gulls are a real local factor and worth planning for. The planning rules are the same as anywhere, but conservation areas and listed buildings are more common along the front. We have published work in Bexhill, Hastings, St Leonards and Eastbourne.