Types of Solar Panels Compared: Which Is Best for Your Roof?
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Most new residential systems use monocrystalline panels, which offer the highest efficiency for the space and a sleek black look. Polycrystalline panels are less common today. Thin-film suits special uses such as RVs or curved surfaces. For most homeowners, comparing price per watt, warranty and efficiency matters more than the cell technology name.
Solar quotes list panel models with technical terms that can be confusing. Here is a plain-language overview.
The main types
| Type | Typical efficiency | Pros | Cons |
|---|---|---|---|
| Monocrystalline | Highest for homes, often around 20%+ | More power per square foot, black look | Slightly higher price |
| Polycrystalline | Lower | Historically cheaper | Less common today, larger area needed |
| Thin-film | Lowest | Lightweight, flexible | Needs much more space |
| Bifacial | Varies | Captures reflected light from the back | Best on ground mounts and light surfaces |
What really matters
- Price per watt of the whole system.
- Performance warranty: how much output is guaranteed after 25 years.
- Temperature coefficient: how much output drops on hot days — important in hot climates.
- Efficiency: matters most when roof space is limited.
Roof space check: If your roof is large and unshaded, standard-efficiency panels may give you more power per dollar. On small or complex roofs, high-efficiency panels let you fit more kilowatts.
Frequently asked questions
Do black panels perform worse in heat?
All panels lose some output as they heat up. Check the temperature coefficient on the datasheet; lower numbers mean less loss.
Are expensive panel brands worth it?
Reputable manufacturers with strong warranties matter, but the installer's quality and the system price often matter more than the brand.
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