N-Type TOPCon Solar Panel: A Complete Guide

The N-type TOPCon solar panels are one of the latest innovations in the solar industry. This is a high-efficiency solar cell technology. This innovative solar technology is grabbing attention due to its powerful performance, durability, and long-term value. But, is it the best solar choice for your home in 2025? Let’s understand it clearly. This article includes its definition, the benefits of N-type TOPCon solar panels, and a case study on this topic.

What Is an N-Type TOPCon Solar Panel?

TOPCon denotes Tunnel Oxide Passivated Contact. The traditional solar panels use a P-type PERC (Passivated Emitter Rear Cell) cell, which utilizes a P-type silicon wafer as its base material. Whereas the latest N-type TOPCon solar panel is designed by utilizing an N-type silicon wafer as its base material.

The layered structure of a TOPCon cell includes an N-type silicon wafer, a thin tunnel oxide layer, and a passivated contact layer.

N-type crystalline silicon has more electrons, making it less affected by impurities like boron or oxygen. Whereas the passivated contact layer helps reduce electron recombination. So, this type of solar panel is highly efficient and durable.

N-Type TOPCon Solar Panel Vs. Traditional Solar Panel

	N-Type TOPCon Solar Panel	Traditional Solar Panel
Materials Used	These solar panels use N-type silicon wafer as their base material.	These solar panels use a P-type silicon wafer as their base material.
Efficiency	They are highly efficient with efficiency up to 21.5% – 23%+.	2. They are comparatively less efficient than N-Type TOPCon solar panels and offer efficiency up to 19% – 21%.
Lifespan	These solar panels often come with 30-year performance warranties.	3. The lifespan of traditional solar panels is up to 25 years.
Temperature Performance	With a lower temperature coefficient, these solar panels perform better in heat.	4. As the temperature rises, traditional solar panels lose their efficiency.
Cost	The upfront cost of N-Type TOPCon solar panels is higher than that of traditional ones. But their higher energy output reduces total cost over time.	5. The upfront cost of a traditional solar panel is lower and ideal for tight budgets.

Reference: DEVELOPMENT OF INDUSTRIAL N-TYPE BIFACIAL TOPCON SOLAR CELLS AND MODULES

5 Reasons Why Homeowners are Switching to N-Type TOPCon Solar Panels?

•  More Power Output from Same Roof Space:

The efficiency of a TOPCon solar panel utilizing an N-type silicon wafer exceeds 22%. High efficiency means more power is generated from the same number of solar panels or the same roof space. Homeowners are switching to N-type TOPCon solar panels to generate more energy from their limited roof space.

• Longer Lifespan

TOPCon solar panels offer a longer lifespan than traditional solar panels. These panels degrade much less, i.e., often below 1% in the first year and only about 0.4% per year afterward. These solar panels will produce more energy over 25 to 30 years, resulting in greater savings with fewer performance losses over time.

• Performs Better in Heat and Low-Light Conditions

The TOPCon cell has a lower temperature coefficient. These types of solar panels perform better even on hot days. They are designed to capture more energy in low-light conditions, such as during mornings, evenings, and cloudy weather.

• Integrated with Bifacial Technology

The TOPCon solar cells can be easily integrated with bifacial technology. The new N-Type TOPCon solar panels are bifacial, which means they can generate power from both the front and back sides of the panel. In reflective surfaces, these types of solar panels can generate up to 10 -15% more energy.

• Highly Stable

The N-type Silicon of TOPCon modules doesn’t use boron, which reacts with oxygen and degrades at a faster rate. So, these types of solar panels are highly stable and less affected by impurities.

Top Brands Providing N-Type TOPCon Solar Panels

Brand’s Name	Technology Used	Power Output	Efficiency	Available for
LONGi Solar	N-type HPBC (Hybrid Passivated Back Contact), TOPCon variant	420W – 570W	Up to 22.8%	Both residential and commercial sizes
JinkoSolar	N-type TOPCon technology	435W – 635W	Up to 22.6%	For residential, commercial, and utility-scale solar farms
JA Solar	N-type bifacial TOPCon technology	435W – 615W	Up to 22.4%	Both large utility projects and small residential projects
Trina Solar	Vertex S+ (N-Type)	420W – 450W	Up to 22.5%	Both rooftops and ground mounts
REC Group	Alpha Pure-R (N-Type)	410W – 430W	Up to 22.3%	Both residential and commercial solar farms

Reference: 11 Best Solar Panel Manufacturers

Reference: 24.58% efficient commercial n-type silicon solar cells with hydrogenation

Is TOPCon Solar Technology Right for Your Home?

TOPCon solar technology is right for your home in case

1. If your roof space is limited and you want to install solar panels that can produce more power than traditional panels, then TOPCon solar panels are the right option for you. These solar panels offer efficiency of 22% or more.
2. If you are planning for a long-term investment, then the TOPCon solar panels offer a consistent and powerful performance for over 25 years.
3. If you are living in a warm region like California, Arizona, or Texas, then installing TOPCon solar panels is a great option. These solar panels can handle heat better and perform better in hot climates.
4. TOPCon solar panels feature improved shading tolerance. So, if your roof has partial shading or complex angles, these solar panels will offer better performance under low light conditions.
5. If your rooftop has a reflective surface, then TOPCon solar panels can be easily integrated into bifacial solar technology. They can capture light from both the front and back sides.

Case Study

Case Study 1: Utility-Scale Solar Project (Tianjin, China)

China Guodian Corporation initiates this 30 MW large utility-scale solar project. In this project, 555 W N‑Type TOPCon modules from the JinkoSolar brand have been installed alongside the traditional solar panels. The TOPCon modules delivered 169.53 kWh per kW installed. Whereas, the PERC panel delivered 161.43 kWh per kW. From this project, we can see a 5.02% increase in energy production with N‑Type TOPCon modules.

Conclusion

If you want to generate more power from the same roof space with improved output over time, then you should opt for N-type TOPCon Solar Panels. This is a long-lasting, reliable, and future-ready solar technology. Its upfront cost may be a little higher, but in the long run, this advanced technology can lead to higher energy savings. So, if you are planning to upgrade your home solar system or want to invest in a commercial solar setup up then you must ask your installer about this advanced and future-proof N-type TOPCon solar technology.

FAQS

• Which company makes the best TOPCon solar panels?

The LONGi Solar company is making the best TOPCon solar panel with an efficiency of up to 22.8%.

• What Is an N-Type TOPCon Solar Panel?

TOPCon denotes Tunnel Oxide Passivated Contact. The latest N-type TOPCon solar panel is designed by utilizing an N-type silicon wafer as its base material. The layered structure of a TOPCon cell includes an N-type silicon wafer, a thin tunnel oxide layer, and a passivated contact layer.

• What is the lifespan of an N-Type TOPCon Solar Panel?

The N-Type TOPCon Solar Paneloften comes with 30-year performance warranties.