As solar panel technology has matured, it has also diversified and become more specialized. The result is a growing number of types of solar panels, each with distinguishing features that make them better for some uses than others.
In this article, we go over the main types of solar panels you have to choose from for your system. You’ll also learn about developing solar panel technology that could soon compete with the options that currently dominate the market.
Types of solar panels: Overview
Solar panels come in several types, each with unique solar panel materials and efficiency levels to suit different needs. Monocrystalline panels use single-crystal silicon, giving you high efficiency and a sleek look. Polycrystalline panels are made from multiple silicon fragments, making them cheaper but slightly less efficient. Thin-film panels use layered materials, so they're lighter and flexible, though you’ll get lower efficiency. Your choice depends on your space, budget, and energy requirements.
| Factor | Monocrystalline | Polycrystalline | Thin-Film |
|---|---|---|---|
| Material | Single-crystal silicon | Multi-crystal silicon | Amorphous silicon, CdTe, or CIGS |
| Efficiency | High (18% to 22%) | Moderate (15% to 17%) | Low to moderate (10% to 13%) |
| Appearance | Black, uniform look | Blue with speckled pattern | Solid black or dark, often matte |
| Cost | Highest | Lower than mono | Lowest (per watt, but varies by type) |
| Weight | Standard | Standard | Lightest |
| Lifespan | 25 to 30+ years | 20 to 25 years | 10 to 20 years (some shorter) |
| Temperature tolerance | Good (low degradation with heat) | Moderate | Excellent |
| Performance in low light | Good | Moderate | Best in diffuse or shaded light |
| Space efficiency | High (more power per square meter) | Moderate | Low (requires more area) |
| Installation flexibility | Limited to rigid, fixed mounts | Limited to rigid, fixed mounts | Highly flexible (can be curved or surface-mounted) |
| Best use cases | Residential rooftops, space-limited installations | Budget-friendly residential or large land-based installations | Portable systems, irregular surfaces, building integration |
Keep in mind solar panels are just one component of a solar system. You'll also need an inverter, mounting racks, batteries (optional), a charge controller (for batteries), and wiring.
Polycrystalline vs monocrystalline solar panels
The overwhelming majority of residential solar panels are made from silicon crystal cells. These photovoltaic (PV) cells consist of silicon layers doped with boron (p-type) and phosphorus (n-type) to create an electric field that enables the conversion of sunlight into electricity.
There are two types of silicon crystal solar panels:
- Monocrystalline solar panels: Monocrystalline panels use a single piece of silicon in their PV cell layer, which makes them more efficient and longer-lasting than other types.
- Polycrystalline solar panels: Polycrystalline solar panels are made by fusing smaller pieces of silicon into a single layer, resulting in lower efficiency but a more affordable price compared to monocrystalline panels.
Thin-film solar panels for lightweight applications
Another popular type of solar panels is thin-film technology. The PV layer in these panels is made from one of the following materials:
- Amorphous silicon (a-Si)
- Cadmium telluride (CdTe)
- Copper indium gallium selenide (CIGS)
- Organic photovoltaics (OPV)
Thin-film solar panels aren’t typically as efficient as silicon crystal panels, but they have other advantages. These panels are usually lighter and more flexible, making them useful for purposes like portable and mobile applications or smaller consumer goods.
Passivated emitter and rear contact panels explained
Passivated emitter and rear contact (PERC) solar panels have gained in popularity in recent years. They employ a specialized layer on the back of the PV cell that reflects uncaptured sunlight back to the cell. This makes them more efficient at generating energy compared to traditional single-sided cells. PERC solar panels are a developing technology and still more expensive than other types of solar panels, but are beginning to emerge as a true competitor in the consumer marketplace.
How N-type solar panels compare to traditional cells
Another emerging technology in the field is n-type solar panels. These panels use n-type silicon crystals as the PV cell layer, which carry a negative charge due to being doped with phosphorus. Compared to traditional solar cells, n-type cells can be more efficient. However, a more substantial difference between the two is that n-type solar panels are more resistant to heat degradation, meaning they are able to maintain their efficiency at higher temperatures. This also affords them superior longevity.
Other solar panel technologies
There are a few other types of solar panel technology that are in use in the solar industry. These technologies are less far along in development than the more popular types, but could well gain market share as development advances.
Bifacial solar panels for enhanced yield
Traditional solar panels are designed to capture light only from above, directly from the sun. However, you can now buy bifacial solar panels that have PV cells on the rear of the panel to capture sunlight reflected from the mounting surface. While not as efficient as light that enters directly from the sun, reflected light can still generate meaningful amounts of energy using bifacial panels.
Building-integrated photovoltaics in modern design
Aesthetics have long been a sticking point for potential solar energy system buyers, with many not liking the look of solar panels or owning homes in neighborhoods with HOA restrictions against them.
Some companies have begun producing solar panels that function as architectural elements, integrating with the design of a building. One popular example of this is solar shingles, which are small solar panels cut in the shape of traditional shingles. These preserve the look of a home while still providing the benefits of solar energy.
If you're interested in solar shingles for your home, several brands offer options to choose from.
- Tesla
- CertainTeed
- Timberline Solar (GAF Energy)
- SunTegra
- Luma Solar
Perovskite solar cells and their future potential
Perovskite cells are one of the newer technologies to emerge in the solar panel industry. They use what are known as perovskite-structured materials in their solar cells. These materials have a different crystal structure from silicon crystals, which have been shown to be more efficient at converting sunlight into energy.
Perovskite solar panels show a lot of promise for the future. Early development has revealed that, in addition to energy efficiency advantages, perovskite cells do not require the raw materials to be as pure as the 99.99% purity required for traditional silicon crystal solar panels.
Concentrated photovoltaics in high-irradiance zones
Another promising technology is concentrated photovoltaic (CPV) technology. These panels replace some of the PV cells with lenses and mirrors that concentrate sunlight before reaching the PV layer, increasing how much energy they can generate. However, CPV solar panels will likely only offer advantages in high-irradiance zones, or places with an abundance of direct sunlight, as they cannot use light that is diffused by clouds or precipitation.
Bottom line on solar panel types
Not everyone will benefit from solar panels, so it’s worth considering if they’re the right fit for your home before making a decision.
You’ve got different types of solar panels to choose from if you’re thinking about adding them to your energy system. For most homeowners with standard residential needs, monocrystalline solar panels usually hit the sweet spot between cost and efficiency. Still, solar panel technology keeps advancing, so some of the newer options out there might soon become a better choice for certain situations.
