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    FAQs

    1. How do photovoltaic systems work?

    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.

    5. Is it recommended to install energy storage batteries in 2026?

    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.

    Chinese-made photovoltaic glass has captured over 80% of the Indian market.

    Shreevar Kheruka, Vice Chairman of Borosil Renewables, an Indian photovoltaic glass manufacturer, recently discussed the impact of exemptions from anti-dumping duties on imported photovoltaic glass on Indian photovoltaic module manufacturers in an interview with industry media. He also elaborated on and discussed other issues. The following is an excerpt from the interview.

     

    What impact will the exemption from anti-dumping duties have on Borosil Renewables or other Indian photovoltaic glass manufacturers?

     

    Kheruka: The Indian government abolished the anti-dumping duties on photovoltaic glass imported from China about a year ago. Since then, sales of Chinese photovoltaic glass in India have increased significantly. Chinese-made photovoltaic glass now accounts for more than 80% of the Indian market. I believe Borosil Renewables is more competitive, and our production costs are also competitive in the global market. However, we now have to compete with manufacturers who receive government subsidies, export subsidies, capital subsidies, and operating expense subsidies, which prevents us from gaining a competitive advantage. Therefore, we need a level playing field.

     

    Do you think the Indian government needs to revise its policies to protect Indian photovoltaic (PV) glass manufacturers?

     

    Kheruka: I hope Indian PV glass manufacturers will receive some policy support, because without government support, Indian PV glass manufacturers cannot expand their production capacity as planned. We have now shelved our expansion plans until we receive some clear support. Currently, Chinese PV glass companies sell their products at prices lower than the production costs of Indian PV glass manufacturers. Unless there is a level playing field, we cannot implement our expansion plans.

     

    How will you implement your expansion plans under the implementation of tariffs?

     

    Kheruka: After the implementation of tariffs, we expanded our PV glass production from 180 tons per day to 1,000 tons per day. Besides us, five other Indian PV glass manufacturers announced capacity expansions during this period, three of which have already started production, and two are building production plants. The implementation of tariffs has helped us invest more capital expenditure in this area. This is beneficial to the development of the Indian PV glass industry. The PV glass industry is a highly capital expenditure-driven industry, with a capital expenditure to turnover ratio of less than 1. This means that for every 100 rupees of capital expenditure we invest, we generate approximately 85 rupees of operating revenue annually. Therefore, we need longer-term policy support because the return on investment for photovoltaic glass manufacturing plants is at least seven years. We can only make expansion commitments with policy guarantees.

     

    How are Borosil Renewable’s export partnerships developing in Europe?

     

    Kheruka: Borosil Renewable recently acquired a German company that manufactures photovoltaic glass, the only photovoltaic glass manufacturer in the EU. We have invested in expanding our capacity to approximately 350 tons per day, which translates to an annual production of 2.5 GW of photovoltaic modules. We acquired this company to increase our sales volume in the European market. Chinese manufacturers are also selling photovoltaic products in Europe, and the European Parliament may take corresponding measures.

     

    We export approximately 30% of our photovoltaic glass products to other countries, which allows us to survive and grow. These products are priced more favorablely than when sold in India, and we plan to increase this sales share in the future.

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