Two Ways to Harvest Solar Energy From Your Roof
If you're planning a solar installation — especially for a new build or a roof that's due for replacement — you may be weighing traditional solar panels against solar roof tiles (sometimes called solar shingles or integrated solar roofing). Both capture sunlight and convert it to electricity, but they differ substantially in appearance, cost, efficiency, and practicality. This comparison breaks down the key differences.
What Are Traditional Solar Panels?
Conventional solar panels — technically called photovoltaic (PV) modules — are mounted on a racking system above your existing roof surface. They sit a few centimetres above the roof and are wired together into a solar array connected to an inverter. This is the technology that has been installed on millions of homes worldwide and has a long, well-established track record.
What Are Solar Roof Tiles?
Solar roof tiles integrate photovoltaic cells directly into roofing materials designed to look like standard roof tiles or shingles. Rather than adding panels on top of an existing roof, the solar tiles are the roof. Products in this category aim to provide the weather protection of a conventional roof plus solar energy generation, with an appearance that blends more seamlessly with the home's architecture.
Head-to-Head Comparison
| Feature | Traditional Solar Panels | Solar Roof Tiles |
|---|---|---|
| Efficiency | 19–23% (monocrystalline) | Typically 14–20% (varies by product) |
| Upfront cost | Lower (per kW generated) | Significantly higher |
| Aesthetics | Visible on roofline | Integrated, lower-profile appearance |
| Best suited for | Most existing roofs | New builds or full roof replacement |
| Installation complexity | Moderate (racking + wiring) | High (full roofing + electrical) |
| Track record | Decades of real-world data | Still maturing technology |
| Repairability | Panels replaced individually | More complex tile-level replacement |
| Warranty structure | Separate panel + installation warranties | Combined roof + power warranties |
The Cost Reality
Solar roof tiles cost considerably more per kilowatt of installed capacity than traditional panels. Part of this is because tiles replace your entire roof covering — so if your roof needs replacing anyway, the comparison shifts. If your existing roof has many years of life left, adding traditional panels on top is almost always the more cost-effective path to solar generation.
The financial case for solar tiles is strongest when:
- Your existing roof is at end-of-life and needs full replacement regardless.
- You are building a new home and can integrate the cost into construction financing.
- Aesthetics are a high priority and you're willing to pay a premium for a lower-profile look.
- Local planning restrictions or HOA rules limit the visibility of traditional panels.
Performance Considerations
Traditional panels can be tilted and oriented for optimal sun exposure, and can incorporate microinverters or power optimisers at the panel level. Solar tiles are fixed at the roof pitch angle and may have less flexibility for shading management. For maximum energy yield, traditional panels generally have the edge — though the gap is narrowing as tile technology matures.
Durability and Longevity
Quality traditional panels are well proven over 25+ years in real-world conditions. Solar roof tiles are a newer product category and the long-term field data is more limited. Look carefully at combined roof and power warranties — specifically, who is responsible if roofing performance and power output issues overlap.
Which Should You Choose?
For the vast majority of homeowners with an existing roof in reasonable condition, traditional solar panels deliver better value, higher efficiency, and a more proven technology. Solar roof tiles are a compelling option for new construction or whole-roof replacement projects where aesthetics and seamless integration outweigh the premium cost — but go in with clear expectations about the price difference and the still-maturing nature of the technology.
Whichever route you choose, get multiple quotes from reputable installers, check warranty terms carefully, and ensure the installer has specific experience with the product type you're considering.