Panels & output
Types of solar panels: a plain-English tour
Solar panel 'types' get more marketing airtime than they deserve — most panels sold today are variations on one technology. But a few genuine distinctions do change what you should buy.This guide tours the types and tells you which differences matter. For ratings and sizes, see the wattage guide.
Written and edited by Christopher Panteli
Christopher is the founder and editor of MyPlugInSolar. He oversees the site’s research standards, data tools and editorial process. He is not an electrician or solar installer, and specialist technical claims are sourced from official documentation or reviewed by appropriately qualified professionals.
The silicon family (almost everything)
Monocrystalline panels — cut from single silicon crystals — dominate the market: the familiar black panels, with typical efficiencies around the high teens to low twenties percent (see efficiency). Polycrystalline (blueish, made from melted silicon fragments) was the budget option for years but has largely faded as mono prices fell. If you're buying new today, you're almost certainly buying mono — the interesting choices are elsewhere.
The distinctions that actually matter
Each has a full guide: rigid vs flexible, bifacial, and integrated panels. For small and plug-in systems the practical choice is almost always a rigid mono panel — see small solar panels.
| Type | What it is | When it matters |
|---|---|---|
| Rigid (glass/frame) | The standard construction | The default for roofs, frames and balconies |
| Flexible | Bendable polymer build | Curved or weight-limited surfaces — with trade-offs |
| Bifacial | Generates from both faces | Open mounting with reflective surroundings |
| Integrated (in-roof) | Replaces the roof covering | New builds, re-roofs, appearance-led projects |
| Thin-film | Deposited coating tech | Niche/portable uses; rare on UK homes |
How to actually choose
Once you're comparing quality mono panels, chemistry stops separating them. What does: rated output for the space you have, the product and performance warranties, physical size and weight for your mounting, and the manufacturer's documentation being traceable and complete — the same evidence standard we apply in our product assessments. Panel type is the start of the conversation, not the decision.
Frequently asked questions
- Which type of solar panel is best?
- For nearly every UK home use: a quality rigid monocrystalline panel. The genuine choices are situational — flexible for curved/weight-limited spots, bifacial where reflected light reaches the back, integrated for appearance-led roofs — and within any type, warranties and build quality matter more than chemistry.
- What's the difference between monocrystalline and polycrystalline?
- Mono cells are cut from single crystals (black, more efficient); poly cells from melted fragments (blueish, cheaper historically). Falling mono prices have made the distinction mostly historical — new residential panels are overwhelmingly mono.
Sources
- 1. PVGIS (Photovoltaic Geographical Information System) — European Commission, Joint Research Centre
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