Solar roof tiles cost more per watt than rack-mounted panels and often less per square metre of finished roof, which is why the price question keeps producing contradictory answers. The two numbers measure different things. This guide sets out the solar roof tiles cost model a developer, roofing contractor, distributor or architect can take into a budget or a tender comparison, line by line.
The cost of a solar tile roof is the installed cost per m² of finished, generating roof: tile supply, battens and underlay, electrical labour, logistics, a paid sample and commissioning, minus the roofing material and the racking that the tiles replace. Comparing module price per watt alone leaves out the two credits that decide whether solar roof tiles are the cheaper roof.
Figures for the tiles we supply come from the supplier datasheet. Where a value is calculated, the arithmetic is shown. Unit prices are quoted per project.
Quick facts: solar roof tile cost inputs
| Input | Value | Source |
|---|---|---|
| Tile formats | 43 W (650 × 432 × 22 mm, 5.5 kg) and 85 W (1208 × 432 × 22 mm, 10 kg) | Supplier datasheet |
| Power per m² of roof | ~170 W/m² | Supplier stated |
| Tiles per kW (85 W format) | 1000 ÷ 85 = 11.8, so 12 tiles | Calculated from datasheet |
| Tiles per kW (43 W format) | 1000 ÷ 43 = 23.3, so 24 tiles | Calculated from datasheet |
| Roof area per kW | 1000 ÷ 170 = 5.9 m² | Calculated from supplier-stated density |
| Connectors | One MC4 pair per tile, 45 cm leads | Supplier datasheet |
| Unit price, MOQ, lead time, warranty | Confirmed in the project quote | Quoted per project |
What does "solar roof tile cost" actually measure?
Solar roof tile cost is the price of a roof covering that also generates electricity, so it has to be measured per square metre of finished roof rather than per watt of modules. The tile replaces the roofing on the area it covers, and that roofing is a cost you no longer pay.
Three phrases get mixed up in quotes and search results. Solar roof tile cost is the cost of tile-format units that interlock with a tile roof, like the 43 W and 85 W glass tiles described here.
Solar shingle cost usually refers to flatter units made to sit in a shingle roof. Buyers often use it as a synonym, and the cost model below applies to both, because both are building-integrated photovoltaics (BIPV) that replace roofing.
Rooftop solar cost per watt is the benchmark for conventional panels on hooks and rails above an existing roof. It prices the solar array only and assumes the roof underneath is already paid for.
The U.S. Department of Energy's solar PV system cost benchmarks split an installed system into eight categories: module, inverter, energy storage, structural balance of system, electrical balance of system, fieldwork, office work and other. The same page gives the cost of a mounting structure in dollars per square metre of modules supported, not per watt. That per-m² habit is the right one for tiles too.
Why cost per watt misleads for solar roof tiles
Cost per watt misleads for solar roof tiles because it charges the tile for being a roof and gives no credit for the roof it replaces. A tile carries glass on both faces, an interlocking edge and a waterproof overlap, and all of that is roofing cost sitting inside a "solar" price.
A rack-mounted array looks cheaper per watt for the opposite reason. Its per-watt figure excludes the tile roof beneath it, the hooks that pierce that roof and the flashing around every hook.
The fair comparison is two finished roofs of the same area. Roof A is solar tiles on the sunny plane plus conventional tiles elsewhere. Roof B is conventional tiles everywhere plus panels, rails and hooks on top.
Once both options include the roof, the gap narrows or reverses depending on three things: whether the roof is being built or replaced anyway, how much racking and flashing the panels would need, and how many electrical connections the tiles add.
Solar roof tile cost line items: what goes into the budget
A solar tile roof budget has seven cost lines and two credits, and each line scales with a different quantity: square metres, tile count, crate count or a fixed amount per project. Putting each line against its driver is what turns a supplier quote into a comparable number.
| Cost line | Scales with | How to quantify | Versus rack-mounted |
|---|---|---|---|
| Tile supply | Tile count by format | N85 × P85 + N43 × P43 (unit prices quoted per project) | Higher per watt |
| Roofing material on the solar area | m² of solar area | Credit: A × your conventional tile cost per m² | Avoided |
| Racking, hooks, penetrations | m² of modules or hook count | Credit: the rack-mounted racking and flashing line from your installer quote | Avoided |
| Battens and underlay | m² of solar area | Same as a tile roof; spacing per laying drawing | Still needed |
| Electrical labour | Tile count (units per kW) | N × labour per connection | Higher: more units per kW |
| Colour or custom premium | Order, not m² | Quoted per finish and size | No equivalent |
| Logistics | Crate count | Tiles ÷ tiles per crate (confirmed with the quote) × freight per crate | Heavier per kW |
| Paid sample | Fixed per project | Sample price quoted on request | Usually skipped for panels |
| Commissioning | String count | Tests per string from your electrician | Similar per string |
Tile supply: units per m² and the 85 W / 43 W mix
Tile supply cost is the tile count by format multiplied by the unit price for each format. The count comes from the solar area and the power per square metre.
At the supplier-stated ~170 W/m², a roof filled with 85 W tiles needs 170 ÷ 85 = 2.0 tiles per m² (calculated from supplier-stated density).
The gross area of one 85 W tile is 1.208 m × 0.432 m = 0.522 m², which gives 85 ÷ 0.522 = 163 W/m² of tile (calculated from datasheet dimensions). The roof figure is higher because tiles overlap, so each one covers less roof than its own gross area. The covered area per tile is confirmed on the laying drawing for your batten spacing.
The 85 W tile fills the main field. The 43 W tile (0.65 m × 0.432 m = 0.281 m², so 43 ÷ 0.281 = 153 W/m² of tile, calculated from datasheet dimensions) fills edges, hips and dormers where a full-length tile will not fit.
A roof with many cut-ins uses more 43 W tiles, and every 43 W tile carries its own connector pair for half the output. So the format mix changes the price as well as the layout.
Roofing material avoided on the solar area
The roofing material credit is the conventional tile cost per m² multiplied by the solar area, because solar tiles are the roof covering where they sit. On a new build or a re-roof this credit is real money; on a sound roof that would otherwise stay in place it is zero.
The rest of the roof still uses conventional tiles in a matched profile and colour. Only the sun-facing area changes.
Racking, hooks and penetrations avoided
The racking credit is the full racking and flashing line from a rack-mounted quote for the same roof. Tiles lock to battens through their edge rails, so no separate rails, clamps or roof hooks sit above the covering.
Every hook in a rack-mounted array is a hole through the roof covering that has to be flashed and kept dry. Removing them removes a labour line and a set of leak points. The rack-mounted hardware side is covered in our solar panel racking systems guide if you need to price that line properly.
Battens and underlay still needed
Battens and underlay stay in the budget for a solar tile roof, at roughly the same quantity as a conventional tile roof. The waterproof layer under the tiles is still the roofer's responsibility.
Batten spacing and minimum pitch are set per project against the roof build-up. The tiles use a low-pitch waterproof overlap design (supplier tested), and the fixing details are confirmed on the drawing for each project.
Colour and custom premium
Colour and custom work add cost at order level rather than per m². Terracotta, grey and black are the standard references; a colour matched to an existing roof, a non-standard length or a different encapsulant (PVB, POE or EVA) is quoted separately.
The premium is worth paying when the roof finish is fixed by a design code or a sales brochure. On a roof no one sees from the street, it adds cost with no return.
Logistics per crate
Logistics cost for solar roof tiles scales with crate count, and tiles ship in wooden crates. Crate count is total tiles divided by tiles per crate, with quantity per crate confirmed with the quote.
Tiles are heavy for their output. Twelve 85 W tiles for one kilowatt weigh 12 × 10 kg = 120 kg (calculated from datasheet weight), so freight and roof loading both belong in the budget from day one.
Paid sample and commissioning
A paid sample is a fixed cost per project, and it catches colour or fit problems before production. Architects check colour, fit and the overlap detail on a physical tile before the production order; the sample price is quoted on request.
Commissioning is priced per string by your electrician: insulation, polarity and open-circuit voltage checks, as on any PV array. A tile roof has more units per string but not necessarily more strings.
How many solar roof tiles per kilowatt? The electrical labour arithmetic
A solar roof needs about 12 of the 85 W tiles per kilowatt (1000 ÷ 85 = 11.8, rounded up), and each tile has its own MC4 connector pair. That count drives electrical labour on a solar tile roof.
With the 43 W format the count doubles: 1000 ÷ 43 = 23.3, so 24 tiles and 24 connector pairs per kilowatt (calculated from datasheet power).
For comparison, the DOE 2025 residential benchmark system is 8 kW dc built from twenty 400 W modules at 20.4 % efficiency. That works out to 1000 ÷ 400 = 2.5 modules per kilowatt (calculated from the DOE benchmark description).
Each connector pair is a joint to make, dress under the tiles and check. Price electrical labour per unit, then multiply by the tile count, rather than taking a per-kW rate from a panel job.
String length is set by voltage. The 85 W tile has a Voc of 16.4 V at standard test conditions and a Voc temperature coefficient of −0.36 %/°C, and the maximum system voltage is 1000 V.
At a design low of −10 °C the tile runs 35 °C below the 25 °C test condition, so Voc rises by 35 × 0.36 % = 12.6 % to 16.4 × 1.126 = 18.5 V. The 1000 V limit then allows 1000 ÷ 18.5 = 54 tiles per string (calculated from datasheet values). Your inverter's input window usually sets a shorter string first.
Both formats run at the same 6.08 A at maximum power, so 43 W and 85 W tiles can share a series string. The maximum series fuse rating is 15 A.
Worked example: a solar tile roof budget with placeholders
A worked solar tile roof budget uses one formula with named inputs, so any buyer can drop in local prices and get a comparable cost per m². The example below uses a 40 m² sun-facing roof plane and no currency figures.
At ~170 W/m², 40 m² carries 40 × 170 = 6,800 W, or about 6.8 kW (calculated from supplier-stated density). One illustrative layout is 76 tiles of 85 W plus 8 tiles of 43 W: 76 × 85 = 6,460 W and 8 × 43 = 344 W, together 6,804 W. The real split comes from the laying drawing.
That layout means 84 tiles and 84 connector pairs. It weighs 76 × 10 kg + 8 × 5.5 kg = 804 kg, or 804 ÷ 40 = 20.1 kg per m² of tile (calculated from datasheet weights).
Installed cost of the solar area = (N85 × P85) + (N43 × P43) + (A × B) + (N × E) + (C × F) + S + K − (A × R) − M
| Symbol | Meaning | Example value | Who supplies it |
|---|---|---|---|
| A | Solar area, m² | 40 | Roof plan |
| N85 / N43 | Tile count by format | 76 / 8 | Laying drawing |
| N | Total units = connector pairs | 84 | N85 + N43 |
| P85 / P43 | Tile unit price by format | Quoted per project | LinkSolar quote |
| B | Battens + underlay per m² | Local rate | Roofer |
| E | Electrical labour per unit | Local rate | Electrician |
| C × F | Crates × freight per crate | 84 ÷ tiles per crate (confirmed with the quote) | LinkSolar + forwarder |
| S | Paid sample | Quoted on request | LinkSolar quote |
| K | Commissioning | Per string | Electrician |
| R | Conventional tiles avoided, per m² | Local rate, zero if roof stays | Roofer |
| M | Racking + flashing avoided | From a rack-mounted quote | Installer |
Divide the result by A for cost per m² of finished, generating roof, and by 6,804 W for cost per watt. Run the rack-mounted roof through the same two divisions and the comparison is like for like.
Two credits carry most of the swing. On a new build, R and M are both full; on a sound roof that stays, R is zero, and the tile roof has to win on M and appearance alone.
How to build a solar tile roof budget in 7 steps
A solar tile roof budget takes seven steps, from measuring the sun-facing area to comparing the result against a rack-mounted quote. The order matters, because the tile count sets the electrical and logistics lines.
- Measure the solar area. Take the sun-facing plane from the roof plan, net of vents, windows and fire setbacks.
- Estimate power. Multiply the area by ~170 W/m² for a first figure, then confirm it on the laying drawing.
- Split the formats. Count 85 W tiles for the main field and 43 W tiles for edges, hips and dormers.
- Price the tile order. Send the counts, colour and encapsulant for a quote; unit prices are quoted per project.
- Add the site lines. Battens and underlay per m², electrical labour per unit, crates and freight, sample and commissioning.
- Subtract the credits. Take off conventional tiles on the solar area and the racking and flashing line a panel installer would have charged.
- Compare per m² and per watt. Put the tile roof and the rack-mounted roof side by side on both measures before choosing.
Are solar roof tiles worth it? When tiles win and when rack-mounted wins
Solar roof tiles are worth it when the roof is being built or replaced anyway, or when planning rules or a design code block visible panels. In those cases the roofing and racking credits are both real, and the tile roof competes on cost as well as looks.
New-build developments are the clearest case. The roof has to be bought regardless, so every square metre of solar tile removes a square metre of conventional tile from the order.
Heritage districts, homeowner associations and developer design codes are the second case. The DOE's homeowner's guide to going solar names building-integrated photovoltaics as the option for matching solar to its surroundings. Where panels would be refused, the tile roof is the only solar roof available.
Rack-mounted panels win on a sound existing roof with years of life left and no aesthetic restriction. The roofing credit is zero, the panels produce more per unit and need fewer connections, and the solar panel brackets for rack-mounted arrays are a smaller line than a tile order.
Flat membrane roofs are the other case where tiles do not apply at all. Ballasted and fixed options for those are compared in our flat roof solar mounting guide.
Solar roof tiles vs solar panels: output per m² and per roof
Solar roof tiles produce less power per square metre than a typical rack-mounted panel, and they produce it without a second layer on the roof. Whether they are "as good" depends on which of those two facts matters more for the project.
The tiles use 182 mm monocrystalline cells under 3.2 mm + 3.2 mm double glass, with an IP67 junction box. The supplier states ~170 W/m² across the roof and annual degradation of ≤0.5 % per year.
The DOE 2025 benchmark module is 20.4 % efficient, which is 0.204 × 1000 W/m² = 204 W/m² of module area at standard test conditions (calculated from the DOE benchmark description). The tile's per-m² figure is lower, so a roof plane limited in area generates more with panels.
Heat affects both. The tile's power temperature coefficient is −0.38 %/°C with a NOCT of 45 °C (supplier datasheet); run your yield model using the ventilation detail of the actual roof build-up.
Where the plane is large enough for the load, the gap in W/m² matters less than the removed racking, penetrations and second layer.
What a LinkSolar quote for solar roof tiles includes
A LinkSolar quote for solar roof tiles is itemised by format, finish and crate, so it drops straight into the budget formula in this guide. As your sourcing partner we collect the drawing, confirm the format mix and colour with the production side, and return one quote with one accountable contact.
The tiles are tested to IEC 61215:2021 / IEC 61730:2016, test reports available on request.
| Quote item | Status |
|---|---|
| Unit price, 85 W and 43 W tile | Quoted per project |
| Minimum order quantity | Confirmed in the project quote |
| Production lead time | Confirmed in the project quote |
| Product and power warranty | Stated in the project quote |
| Paid sample | Quoted on request |
| Tiles per wooden crate | Confirmed with the quote |
| Colour, size, encapsulant options | Terracotta, grey, black as references; others quoted |
Formats, finishes and the full datasheet are on our solar roof tiles for project buyers page. Non-standard sizes follow the same drawing-to-sample route as our custom solar panels.
Request a quote with your roof plan
Solar roof tile cost: questions buyers ask
Solar roof tile cost questions from buyers come down to value, total price, roof size and performance against panels, and each answer below stands on its own.
Are solar roof tiles worth it?
Solar roof tiles are worth it on a new build or a re-roof, and where planning rules block visible panels. On a sound existing roof with no restriction, rack-mounted panels usually cost less per watt because the roofing credit is zero.
How much does a solar tile roof cost?
A solar tile roof costs tile supply plus battens, underlay, electrical labour, logistics, a sample and commissioning, minus the roofing and racking it replaces, so it is quoted per project. Send the roof plan and the quote comes back itemised by format.
How much would solar cost for a 1000 sq ft roof?
Solar on a 1000 sq ft roof costs whatever the sun-facing part of it costs to cover, because only that plane carries tiles. 1000 sq ft is 1000 × 0.0929 = 92.9 m²; if half faces the sun, 46 m² × 170 W/m² = 7,820 W, about 7.8 kW (calculated), and the budget follows the seven-step method in this guide.
Are solar tiles as good as solar panels?
Solar tiles use 182 mm monocrystalline cells like many standard panels but produce less per m² (~170 W/m² supplier stated). They replace the roof covering and remove racking, so per finished roof they can compete; compare both datasheets for your roof.
What are the disadvantages of solar roof tiles?
The main disadvantages of solar roof tiles are lower output per m² than a typical panel and more electrical connections per kilowatt. An 85 W tile roof needs about 12 connector pairs per kW, against 2.5 for a 400 W panel array.
What does solar roof installation cost include?
Solar roof installation cost includes roofing labour for battens, underlay and laying, plus electrical labour per tile and per string. It excludes racking and hook flashing, which a tile roof does not need.