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FAQs

Photovoltaic cells are made of semiconductor materials, primarily silicon. When sunlight shines on the cells, photons excite electrons to escape their atomic orbits, generating direct current (DC). This DC current is then converted into alternating current (AC) used in our homes via an inverter.

2. Monocrystalline Silicon vs. Polycrystalline Silicon: Which to Choose in 2026?

Monocrystalline Silicon: Darker in color (near black), higher efficiency (typically exceeding 22%), better performance in low light, and currently the mainstream choice in the market.

Polycrystalline Silicon: Bluish in color, lower cost, but slightly better in high-temperature performance.

3. How Much Do Shading and Dust Affect Power Generation?

Very Significant. Even a small patch of shade (such as tree branches or chimneys) blocking one cell can cause a significant drop in power for the entire module or even the entire cell string. Optimizer or micro-inverter technology in 2026 can effectively mitigate this "weakest link" effect.

4. Is My Roof Suitable for Solar PV?

Orientation: In the Northern Hemisphere, due south is best; southeast or southwest are next best.

Angle: The ideal tilt angle is usually equal to the local latitude to ensure maximum solar radiation throughout the year.

Shading: Ensure no shading during the critical power generation period from 9 AM to 3 PM.

This depends on local electricity pricing policies. If the local feed-in tariff is low, or there are frequent power outages, installing an energy storage system (such as lithium batteries) can significantly improve the self-consumption rate of electricity, using the electricity stored during the day at night.

6. How long can a photovoltaic system last?

Most high-quality photovoltaic modules have a linear power guarantee of 25-30 years. It is usually promised that after 25 years, the power generation efficiency will still be no less than 80%-85% of the initial value.

7. Do solar panels need frequent cleaning?

If there is a lot of rainfall in the area, rainwater can usually act as a self-cleaning agent. However, in areas with high winds or bird populations, dust and bird droppings can create a "hot spot effect," which can seriously damage the modules. It is recommended to inspect the system every six months, and wipe it with clean water in the early morning or evening (when the module temperature is lower).

8. Should the power be cut off during thunderstorms?

Modern photovoltaic systems are equipped with comprehensive lightning protection grounding systems and surge protectors. Normally, manual power disconnection is not necessary. However, in the event of extreme thunderstorms, for safety reasons, it is advisable to temporarily disconnect the AC side switch.

The 17th China New Energy International Expo and Summit Forum is about to be held in Xi’an!

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Industry News
2026-03-16

To comprehensively advance the new journey and new practices of China’s modern new energy industry, under the guidance of the All-China Federation of Industry and Commerce (ACFIC), the ACFIC New Energy Chamber of Commerce will hold the “17th China New Energy International Expo and Summit Forum (NEX2023)” in Xi’an from November 22nd to 24th, 2023.

This event adopts a “combination of exhibition and research” format. The expo aims to strengthen industry exchange and display on the multi-scenario applications of new energy sources such as solar, wind, biomass, hydrogen, and energy storage, comprehensively showcasing new technologies, new materials, new products, and new business models across all segments of the domestic and international new energy industry chain. Continuing the successful practices of previous years, the expo will continue to feature an “Opening Ceremony Thematic Forum,” as well as specialized forums on photovoltaic leaders’ dialogues, energy storage, “photovoltaics+”, finance and new energy, biomass energy, hydrogen energy, thermal utilization, and low-carbon emission reduction. Concurrently, the event will also host a variety of activities, including the release of the “2022-2023 China New Energy Industry Development Report,” “centralized project signing,” “strategic signing,” “high-level dialogues,” “project matchmaking,” “investment visits,” “local government investment promotion,” and “investment and financing services,” to meet the diverse needs of domestic and international new energy representatives.

This year’s event, themed “New Energy Empowering Modernization,” will invite leaders from the All-China Federation of Industry and Commerce, relevant ministries and local governments in the new energy sector, as well as industry leaders, experts, scholars, and business giants from both domestic and international markets. Focusing on topics such as industrial and commercial applications, distributed generation, and energy storage, the event will share the latest perspectives on industrial ecosystems, technological advancements, and cutting-edge observations. It will also interpret the latest hot topics in industry policies, investment environment, and market development, offering strategic advice for creating a new landscape for industry development.

According to the Chamber of Commerce Secretariat, the event has already successfully attracted leading companies from various new energy fields, including solar, biomass, wind, hydrogen, and energy storage, to participate.

This event integrates the latest technological achievements of enterprises, the most refined scientific research results in the industry, and the most in-depth expert interpretations, providing guidance for the new energy industry to seize new development opportunities, cultivate new growth drivers, and shape new advantages.

A grand industry event to seize business opportunities and drive industrial transformation is about to begin. We welcome your enthusiastic registration and participation in this new energy extravaganza!