Comparison Guide
Solar Roof
vs Solar Panels
Two ways to put solar on a building. One replaces the roof. One sits on top of it. The right choice depends on project type, budget position, and what the client values.
The Core Difference
Solar Roof
IS the roof
Active PV tiles replace conventional roofing material. The roof surface itself waterproofs the building and generates electricity simultaneously. No rack, no gap, no visible hardware.
Solar Panels
Sit ON TOP of the roof
Standard PV modules mounted on a rack above an existing roof. The roof and the solar system are two separate components, installed and maintained independently.
Visual Comparison
Hangzhou Xianghu Arcadia Villa
Lumina Slate glass solar tiles — flush finish, no visible rack or frame
Xuzhou Luxury Villa
Same building — integrated solar roof (left) vs rack-mounted panels (right)
Full Specification Comparison
Side by Side
Every major dimension compared with real data.
Swipe the table to compare →
| Specification | Solar Roof (BIPV) | Solar Panels (BAPV) |
|---|---|---|
| System type | Building-integrated (BIPV) | Add-on (BAPV) |
| Roof function | IS the roof — waterproofs + generates | Separate from roof |
| Appearance | Flush, architectural finish | Visible rack and frame |
| Module efficiency | 14–17% (glass tile / metal sheet) | 20–23% (standard panel) |
| Power per m² | ~100–130 W/m² (roof area) | ~150–200 W/m² (panel area) |
| Installation | Replaces roof — one trade | Added to existing roof — two trades |
| Roof penetrations | None — zero penetration design | Mounting bolts through roof |
| Maintenance access | Standard roofing maintenance | Panel + roof maintenance separately |
| Lifespan | 25–30 years (aligned with roof life) | 25–30 years (panel) + roof separately |
| Best application | New build, re-roof, premium project | Retrofit on existing roof |
| Cost vs roof + panels | Higher per watt, replaces roof cost | Lower per watt, added to roof cost |
| Permitting complexity | Roof permit + electrical permit | Electrical permit (roof permit if re-roof) |
Cost Reality
The Right Cost Comparison
Solar roof is often compared unfairly against solar panels alone. The correct comparison is solar roof vs (new roof + solar panels). When a roof replacement is already needed, the cost delta shrinks significantly.
* Indicative figures for a 150–200 m² residential project. Actual costs vary by market, product specification, and installation complexity.
Swipe the table to compare →
| Scenario | Roof Cost | Solar Cost | Total | Note |
|---|---|---|---|---|
| Solar panels on existing roof | — | $8,000–15,000 | $8,000–15,000 | Roof not replaced |
| New conventional roof + solar panels | $12,000–20,000 | $8,000–15,000 | $20,000–35,000 | Two separate systems |
| Solar roof (replaces roof + generates) | — | $18,000–32,000 | $18,000–32,000 | One integrated system |
Decision Guide
Which One Fits Your Project?
Neither is universally better. The right choice depends on project context.
Choose Solar Roof when…
- ✓ The roof needs replacing anyway — the cost delta shrinks significantly
- ✓ Appearance matters — villas, resorts, premium residential, heritage areas
- ✓ No visible hardware is a client requirement or planning condition
- ✓ New construction — integrate from the start, no retrofit complexity
- ✓ The project is in a market where solar roof aesthetics command a price premium
Choose Solar Panels when…
- ✓ The existing roof is in good condition and has 10+ years of life remaining
- ✓ Maximum power output per m² is the primary goal
- ✓ Budget is the primary constraint and aesthetics are secondary
- ✓ The roof is flat or very low slope (not suitable for solar roof tiles)
- ✓ Quick retrofit with minimal structural work is required
Real Projects
Solar Roofs in the Field
Factory-supplied complete solar roof packages on delivered projects.
Factory Supply · B2B
Decided on Solar Roof?
We Supply the Complete Package.
Sunlit manufactures and supplies complete solar roof packages — glass tile line (Lumina Slate) and metal sheet line (Storm Guard) — factory direct to distributors, installers and developers in overseas markets.
Glass + Metal
Two product lines
20+
Delivered projects
IP68
Waterproof rating
B2B
Factory direct
Continue Reading
Explainer
What Is a Solar Roof? Complete Guide
How it works, what components it includes, and who it's for.
Product Line
Lumina Slate: Premium Glass Solar Roof Tiles
70W per tile · Mono PERC · Double glass · Slate-look finish.
Product Line
Storm Guard: Metal Solar Roof Sheets
135W per sheet · Mono TOPCON · IP68 · Large-scale commercial.