Solar for Businesses - FAQ - TCL SunPower Global

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How much can I expect to save on my energy bills after installing solar panels?

Financing

Solar Panels

The amount you can save on energy bills depends on your energy consumption, the number of solar panels you have, and local electricity rates. On average, homeowners can save anywhere from 20% to 70% on their electricity bills with solar panels.

How much energy do solar panels produce?

Solar Panels

The amount of energy produced by solar panels depends on several factors, including the size and efficiency of the panels, the amount of sunlight they receive, and their orientation and location. On average, a 1-kilowatt (kW) solar panel system can generate approximately 800 to 2000 kilowatt-hours (kWh) of electricity per year in a location with good sunlight.

How would I benefit from choosing TOPCon panels?

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TOPCon panels deliver significant benefits over PERC technology, producing more energy through higher efficiency, lower annual power degradation, better performance in high temperatures and low light conditions. They also offer enhanced reliability, and more efficient bifacial production, leading to more power generation per square meter, better value over the long term, and excellent reliability for installations in harsh environments. With superior performance in all operating conditions, TOPCon sets a new benchmark for high-efficiency, future-proof solar technology.

Now that SunPower is part of TCL, how will the organisations work together to extend their back contact leadership?

Utility

Tips

Warranty

SunPower M Class, as well as future generations of back contact technology, will benefit from TCL’s robust supply chain, strategic partnerships, and world-class production capabilities.

SunPower M Class is more than a product—it’s a platform for innovation, designed to evolve with the industry and deliver smarter, more adaptable solar solutions to customers around the world.

What are the advantages of TCL Solar shingled TOPCon panels?

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The advantages of shingled TOPCon panels include:

Higher Efficiency: The smaller 1/3-cut cell design significantly lowers the internal current and shortens the path for the electricity to flow, resulting in lower resistive losses and improving efficiency.
Cooler Operating Temperatures: Lower current helps to reduce the power dissipation in the form of heat. This simply means lower cell operating temperature, improving thermal performance in real-world and high-temperature installations.
Extended Panel Lifespan: Reduced heat and lower thermal stress help minimize long-term power degradation and improve reliability over the panel’s lifespan.
Improved Shade Tolerance: Smaller cells operate more independently, so shading on one area has minimal impact on the rest of the panel, reducing overall power loss in partially shaded conditions.
Enhanced Mechanical Strength: Smaller cells experience less mechanical stress, lowering the risk of micro-cracks and improving durability during transport, installation, and operation.
Maximized Active Area: The shingled, overlapping cell layout eliminates inactive “dead zones” between cells, ensuring the entire panel surface is used to capture more sunlight and increasing energy production.
Flexible Inter-Cell Connections: Advanced flexible interconnections improve resistance to temperature swings, reduce the risk of ribbon failure, and enhance reliability. Tested beyond industry standards for thermal cycling, shingle panels ensure reliability in the field.

By combining N-type TOPCon cells and shingled design, shingled TOPCon panels deliver higher efficiency, cooler operation, and exceptional long-term reliability—engineered for maximum performance in real-world conditions.

What are the advantages of TOPCon panels?

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The advantages of TOPCon panels include:

Higher Efficiency: TOPCon cells in mass production can reach efficiencies of over 25%. This results in higher power output and better energy yield for the same installation area.
Lower Degradation: TOPCon modules exhibit lower first-year degradation and slower long-term annual degradation, ensuring more consistent energy generation over the panel’s 30-year lifetime.
Enhanced Durability: The thin oxide layer provides excellent protection against moisture, temperature fluctuations, and environmental stress, improving long-term reliability and reducing performance loss over time.
Lower Temperature Coefficient: With better resistance to heat, TOPCon modules maintain higher efficiency in hot conditions. This is especially valuable in sunny regions or during peak summer months, where traditional panels may suffer larger efficiency drops.
Superior Bifacial Performance: TOPCon modules offer a higher bifaciality rate, enabling them to capture more reflected and diffuse light, which in turn boosts total energy yield—especially valuable in commercial and utility-scale installations.
Improved Low-Light Performance: Thanks to excellent passivation and reduced electron recombination, TOPCon panels perform better during early mornings, late afternoons, and cloudy days. This extends daily energy production and enhances overall system output.

With superior performance in all operating conditions, TOPCon sets a new benchmark for high-efficiency, future-proof solar technology.

What are the advantages of using Back Contact panels?

Solar Panels

Higher Power Generation:

Superior Shading Performance: Back Contact modules limit power loss to only the shaded area, reducing shading impact by up to 34% and delivering stronger performance in sites with moving or uneven shade.

High Reliability:

Improved Microcrack Resistance: Full-backside thermal welding design improve the module’s reliability under mechanical loads and temperature fluctuations.
Reduced Risk of Hotspot: Low breakdown voltage and uniform breakdown across the entire cell help reduce the dissipated power, protecting the module from hotspots and improving module reliability.

With industry-leading efficiency, intelligent shade management, and exceptional durability, Back Contact technology delivers higher-yield and more reliable modules—setting a new benchmark for solar industry.

What are the benefits of partnering with SunPower?

Solar Panels

As a SunPower installer, you gain access to:

Industry-leading high-efficiency solar panels.

Dedicated technical support and training.

Exclusive pricing and financing options.

A trusted brand with over 40 years of solar innovation.

Sales and marketing support to grow your business.

Visit our Installer Partner Program to learn more.

What are the benefits of using smaller 1/3-cut solar cells in a panel, compared to full-size or half-cut cells?

Solar Panels

Smaller 1/3-cut cells significantly reduce internal current and shorten the path electricity must travel within the panel. Lowering the internal current leads to a substantial reduction in resistive losses compared to full-size or even half-cut cells. This directly improves panel efficiency while also lowering operating temperatures—an important factor for long-term performance and durability, especially in hot climates. By integrating the smaller 1/3-cut TOPCon cells with advanced shingled design, shingled TOPCon panels deliver higher efficiency, cooler operation, and outstanding long-term reliability for real-world performance.

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