Rooftop Solar

India added a record 4.9 GW of rooftop solar capacity in the first nine months (9M) of calendar year (CY) 2025, with 2.1 GW installed in Q3 alone.

A wastewater treatment plant in the canton of Bern has been inaugurated with what dhp Technology claims is the world’s largest foldable rooftop solar installation to date. The 3.6 MW array spans several treatment basins, allowing the existing site to serve dual purposes: wastewater treatment at ground level and solar power generation overhead.

Crompton Greaves Consumer Electricals has secured an order to install a cumulative 77 MW of rooftop solar capacity across more than 40,000 homes in Andhra Pradesh.

India’s decision to tighten inverter protocols and secure rooftop solar data under national jurisdiction is a critical step toward reinforcing its energy sovereignty. With ambitious rooftop solar targets already underway, these measures help ensure that growth in clean energy does not come at the cost of vulnerability in grid security, data privacy, or foreign dependence.

Researchers in China have developed a dust monitoring technique that relies solely on the existing hardware resources of inverters, without requiring extra sensors or meteorological data. Tests on real rooftop PV arrays demonstrated an accuracy exceeding 96%.”

Despite a nearly fourfold increase in applications between March 2024 and July 2025, only 13.1% of the target of one crore (10 million) residential rooftop solar installations had been achieved, and just 14.1% of the allocated INR 65,700 crore ($7.5 billion) in subsidies released under the PM Surya Ghar: Muft Bijli Yojana as of July 2025. Given this context, achieving the FY2027 target of 30 GW capacity remains a considerable challenge, according to a new report by IEEFA and JMK Research.

Solar panels typically experience only a 10-20% reduction in output during monsoons, not a complete shutdown. The reason is simple: modern panels efficiently capture diffused light, converting scattered sunlight even on cloudy days.

Crompton Greaves Consumer Electricals Ltd (Crompton) has secured a solar rooftop order worth INR 52 crore in Telangana, marking its entry in this segment. The move aligns with the company’s broader strategy to significantly expand its total addressable market (TAM) from INR 75,000-1 lakh crore to INR 2 lakh crore.

Using Lyon as a case study, an international research team has simulated the effects of rooftop photovoltaic (PV) coverage in an urban area at three levels: 25%, 60%, and 100%. The results have shown that solar panels can raise daytime temperatures by up to 0.72 °C, while cooling nighttime temperatures by up to 0.42 °C. In addition, daytime air conditioning demand has decreased by about 5%.

Many homeowners assume leased or loaned solar systems will boost their home’s value, but outstanding loans often drag down equity instead.