Mounting plug-in solar: balcony, wall, roof or garden
Where plug-in solar panels can go, how orientation and tilt change output, and what to check on wind, weight and permission before fixing anything.
Plug-in solarPublished
Plug-in solar panels belong wherever they get the most direct sun for the longest time with the least shade. For most people that means a south-, east- or west-facing balcony railing, a sunny wall, a flat roof, a shed or a stand in the garden. The mounting itself must be approved by the manufacturer for that surface and strong enough for wind and weather. Anything beyond that, such as drilling into a facade or fixing to a pitched roof, needs more care and often permission.
The options at a glance
| Location | Typical angle | Strengths | Watch out for |
|---|---|---|---|
| Balcony railing | vertical or slightly tilted | most common in flats, no extra space needed | shading from balconies above, railing strength, permission |
| Wall | vertical or tilted brackets | good for houses with a sunny gable | fixing into the masonry, height, permission |
| Flat roof or terrace | tilted stand | free choice of angle | ballast and wind, roof membrane |
| Shed or garage roof | follows roof pitch | short cable to the house | roof condition, edge distance |
| Garden | tilted ground stand | ideal angle, easy access | shade from trees and fences, cable route |
Orientation and tilt
Orientation and tilt decide how much a panel can produce. A few rules of thumb, which you can check for your own address in the European Commission’s PVGIS tool:
- South gives the highest yearly yield in Europe.
- East or west gives less in total, but morning or afternoon output can match your consumption better.
- North is rarely worthwhile.
- Tilted panels, angled up towards the sky, produce more over the year than vertical ones.
- Vertical panels lose most in summer and relatively little in winter, because the low winter sun hits them more directly.
How these choices affect your payback is easy to test in our yield and payback calculator: change the specific yield to the value PVGIS gives for each option.
Shade matters more than angle
Even partial shade on one panel can cut its output sharply. A balcony above, a tree, a satellite dish or a parasol can cost more than a poor angle. If you have the choice, a slightly worse angle in full sun usually beats a perfect angle in partial shade. Microinverters with one input per panel limit the damage, because a shaded panel does not drag down the other one; see how plug-in solar works.
Wind, weight and fixings
A standard solar panel has a large surface and catches wind like a sail. Manufacturers of mounting kits state for which surfaces, heights and wind conditions their products are designed. Follow those limits; they are part of the product approval.
- Balcony railings must carry the weight and wind load. Old or lightweight railings may not be suitable. If in doubt, ask the landlord, the building’s managing agent or a structural engineer.
- Wall brackets need fixings suited to the masonry. Drilling into insulation systems on the outside of a building needs special anchors.
- Flat roofs and ground stands need enough ballast or anchoring as specified by the manufacturer. Do not pierce a roof membrane.
- Height. The higher the panels hang, the more serious a falling panel is. Some countries have extra building rules for glass and panels above a certain height; check locally.
- Lightweight panels are available for balconies, but their output, lifespan and fire behaviour differ from standard glass panels. Check the data sheet.
Running the cable is part of the job: lead it through a window, door seal or wall bushing designed for the purpose, protect it from pinching and keep it away from walkways.
Permission and neighbours
If you rent your home or own a flat in a block, the outside of the building usually is not yours alone. In Great Britain, leases often require consent from the landlord or freeholder before anything is fixed to the exterior. Listed buildings and conservation areas can have planning restrictions. See our guide for renters and flats and the country page for the UK and Ireland.
Also think about neighbours: panels can reflect sunlight into windows, and a panel hanging over a shared space needs to be safe for people below.
A short checklist
- Track the sun on your balcony, wall or garden for a day and note when shade falls.
- Look up the expected yield for each candidate spot in PVGIS.
- Choose a mounting kit approved for that surface, height and wind exposure.
- Ask for permission where needed.
- Plan a safe cable route to the socket.
Frequently asked questions
Do panels on a vertical balcony railing make sense?
They produce less over a year than tilted panels in the same spot, but they are often the only option in a flat and they do relatively well in winter, when the sun is low. Check the expected yield for a vertical mounting in PVGIS before you decide.
Can I put panels on the ground in the garden?
Yes, ground stands are a common choice and usually allow an ideal angle. Weigh them down or anchor them as the manufacturer specifies, keep the cable route safe and avoid shade from fences and plants.
Is east-west worse than south?
It yields less in total, but spreads production over the morning and afternoon. If you use most power at those times, the share you use yourself can be higher, which partly closes the gap.
Do I need planning permission in the UK?
Small solar installations are often covered by permitted development, but listed buildings, conservation areas and flats can be different. Ask your local planning authority if your building falls into one of these categories.
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