Solar Cycle Shelter Size and Output: From 10 to 80 Bikes

Most guides to solar canopies start with a car park. The smaller structures, such as the cycle shelter by the staff entrance, are easier to size and easier to justify because the shelter is being built anyway. This guide sizes a solar cycle shelter from the one number every estates manager already has, the number of bikes, and shows what it generates and what it costs on stated assumptions. For the wider picture on walkways and shelters, see our page on solar walkway and cycle-shelter canopies.

This site is an independent guide, not an installer. The table below is arithmetic from our planning assumptions, not a quote for your site.

The three assumptions

1. Roof area per bike: 1.5 square metres. Stands are commonly set about a metre apart with enough depth for a bike to be wheeled in, and a shelter needs overhang for rain cover. This is our assumption; compare it with your own layout, because two-tier racks and tight spacing change it.
2. Capacity per square metre: 0.2 kWp. A modern 450 W panel is roughly two square metres, so allowing for spacing, edge details and low-tilt mounting, 0.2 kWp per square metre of roof is a sensible planning figure.
3. Yield: 900 kWh per kWp per year. This is the planning figure used across our canopy pages; northern Scotland is lower and the south coast is higher. Panels on a shelter sit at a low tilt, typically 5 to 15 degrees, to limit wind uplift, which costs a little output compared with an optimum roof.

Sizing table: 10 to 80 bikes

Bikes covered	Roof area	Capacity	Output a year	Cost at £1,200–£3,000/kWp
10	15 m²	3 kWp	2,700 kWh	£3,600–£9,000
20	30 m²	6 kWp	5,400 kWh	£7,200–£18,000
40	60 m²	12 kWp	10,800 kWh	£14,400–£36,000
80	120 m²	24 kWp	21,600 kWh	£28,800–£72,000

The cost range is the small-build range quoted on our cost page for compact or architecturally complex canopies. It includes the structure, which is why it is higher per kWp than a large car-park canopy. Very small schemes carry fixed costs for design, planning, the electrical connection and site set-up, so a 10-bike shelter will usually sit toward the upper end. Treat the figures as a first filter and get a priced proposal before any decision.

What a shelter actually needs to power

The generation in the table is much larger than the load a cycle shelter normally has. Typical loads are LED lighting, CCTV, access control and signage, together often a few hundred watts, and e-bike charging if you provide it. As an illustration of the charging load, a typical e-bike battery is in the region of 0.5 kWh; ten of them charged from empty need about 5 kWh in a day. A 20-bike shelter generating 5,400 kWh a year averages about 15 kWh a day, though far more in summer than winter. So the roof can cover the shelter’s own services many times over, and the question becomes what to do with the surplus.

The options are to connect the shelter to the nearest building’s supply so the surplus offsets that building’s demand, to export it under the Smart Export Guarantee, or to add a battery. Connecting into a building’s supply needs a cable route and an electrical design, which is often where the cost and time sit. If the shelter is a long way from a supply, a stand-alone design with a small battery can power lighting and CCTV with no trenched cable, at the price of more equipment to maintain.

Worked example: a 20-bike staff shelter

Take a shelter roughly 10 m long and 3 m deep, covering 20 bikes, with about 13 panels of 450 W, which is 5.85 kWp, close to the 6 kWp in the table. At 900 kWh per kWp it generates about 5,300 kWh a year. Now add up the loads, again as illustration only. LED lighting, CCTV and access control averaging 300 W around the clock use about 2,600 kWh a year; ten e-bikes charged from empty on each of 230 working days use about 1,150 kWh. The total of about 3,750 kWh is well inside the roof’s annual output, but the timing is the catch: lighting and CCTV run mostly in the dark, when the panels produce nothing, so without a battery the shelter would draw most of its night-time power from the grid anyway. The daytime e-bike charging, by contrast, lines up well with the generation. That is why the sensible question is not “can the roof cover the load?” but “how much of the output will be used at the moment it is made?”. Ask any designer to model it hour by hour.

Grid rules at this scale

Up to 16 A per phase, about 3.68 kW single-phase or roughly 11 kW three-phase, a generator is connected under G98 and notified to the network operator within 28 days. That covers the 10-bike and 20-bike examples if they are connected on a three-phase supply. Above that, G99 applies and you need the network operator’s approval before you connect, which means the 40-bike and 80-bike examples need an application. Ask any contractor which route they are assuming and who applies.

Structure and layout choices

• Roof type. Panels over a solid deck give output and rain cover; integrated glass-glass or semi-transparent modules let daylight through at lower output per square metre.
• Orientation. A long, narrow shelter is orientated by the site, not by the sun. A south-facing run suits the single-pitch layout best; east-west pairs trade some peak output for a flatter day.
• Wind. Light roofs are lifted by wind, so the design must take wind actions for the site’s exposure from the Eurocode and its UK National Annex. Ask for the design basis in writing.
• Security and lighting. Shelters double as safe places to leave a bike; ask for the lighting design and CCTV positions as part of the proposal, not as an afterthought.

Planning

The permitted-development right for solar canopies in England, Class OA, is written for non-domestic car parks and is subject to prior approval. A cycle shelter is not a car park, so do not assume the right applies; our planning guide explains the car-park route and its limits. Ask your local planning authority in writing which route applies to a cycle shelter on your site, and check conservation-area and listed-building status before you commission drawings.

When a solar cycle shelter makes sense

The strongest case is a shelter you were already going to build, on a site that can use or export the surplus. On the arithmetic above the PV alone has a longer payback than a roof system, so the decision rests on the shelter budget already being committed, on avoiding a grid spur for local services, and on the sustainability value some organisations place on visible generation. If you are weighing the shelter against a bigger structure, our carport versus rooftop comparison sets out the longer-payback trade-offs.

If the structure you have in mind is a roofed path rather than a shelter for bikes, our guide to covered walkway canopies does the same arithmetic per metre of run.

To discuss a specific site, request a quote and we reply by email, or use our checklist for choosing a canopy installer to prepare your questions.

Frequently asked questions

How many solar panels fit on a cycle shelter?

It depends on the roof area. On our planning assumption of 0.2 kWp per square metre, a 30 square metre roof for about 20 bikes carries around 6 kWp, which is roughly 13 panels of 450 W. The structure, spacing and any shading change the number, so ask for a layout drawing.

Can a solar cycle shelter charge e-bikes?

Yes, at the scale of AC charging points, which is well within what a shelter roof can supply over a day. For example, ten e-bike batteries of about 0.5 kWh each need roughly 5 kWh to charge from empty, a small fraction of the 5,400 kWh a 20-bike roof generates in a year. The limit is the timing: generation peaks around midday and in summer.

Does a cycle shelter need planning permission?

Often it does, or it needs a check with the local planning authority. The Class OA permitted-development right in England is for non-domestic car parks, not cycle stores, so do not assume it applies. Ask your authority before commissioning drawings.

What does a solar cycle shelter cost?

On the range used on our cost pages, small bespoke canopies run about £1,200 to £3,000 per kWp. A 6 kWp, 20-bike shelter would therefore be around £7,200 to £18,000 before any saving against a plain shelter. Small schemes carry fixed costs, so expect the upper end for architectural designs.