Overview of common solar panel types
There are three main types of solar panels used in residential and commercial systems: monocrystalline, polycrystalline (also called multicrystalline), and thin-film. Each type has distinct advantages and trade-offs in efficiency, cost, and aesthetics.
Monocrystalline panels
- Made from single-crystal silicon with a uniform look and rounded cell corners.
- Typically offer the highest efficiency and best space efficiency, meaning more power per square foot.
- Often more expensive but preferred where roof space is limited.
Polycrystalline panels
- Made from multiple silicon crystals melted together, giving them a speckled blue appearance.
- Generally lower cost than monocrystalline and slightly lower efficiency.
- Good budget-friendly option when space is available.
Thin-film panels
- Created by depositing thin layers of photovoltaic material onto glass, metal, or plastic.
- Lower efficiency and larger area required for the same power, but can be flexible and lightweight.
- Often used in specialized applications or where aesthetics and weight are important.
Other variations and innovations
- Bifacial panels capture light from both sides, increasing energy yield in reflective environments.
- PERC (Passivated Emitter Rear Contact) and heterojunction technologies are improvements that boost efficiency.
Choosing the right panel depends on priorities: efficiency and space savings point toward monocrystalline, cost-conscious projects may opt for polycrystalline, and specialized needs might use thin-film. For most homeowners, monocrystalline panels offer the best balance of performance and longevity.