It’s not just big commercial and industrial companies that are reaping the benefits of switching to solar. Housing complexes with large rooftop spaces are increasingly installing solar systems to reduce their electricity bills.

Binori Moneta in Ahmedabad, Gujarat, is an example. This residential development is saving ₹260,000 (~$2,892) annually after it installed a 20-kW rooftop solar system. The installation caters to 90% of the housing complex’s common area power needs.

Gujarat-based rooftop installer, Perfect Renewtech, set up the project in June 2025.

Ankit Ramoliya, Founder and Director at Perfect Renewtech, said the housing complex with 25-28 apartments had ample unused rooftop space, making it ideal for a solar installation.

The rooftop solar system uses Adani Solar’s 570 W domestic-content-compliant TOPCon N-type modules, coupled with Solaryaan’s 20 kW inverter.

The project was set up at a cost of ₹1.1 million (~$12,194.9) by availing a subsidy of ₹360,000 (~$3,991.07) under the PM Surya Ghar: Muft Bijli Yojana.

Before the installation of the rooftop system, the apartment consumed nearly 2,500 units per month and an estimated 30,000 units annually. Collectively, the apartment’s power expenditure for the common areas was ₹27,500 (~$305.89) every month and ₹330,000 (~$3,704.16) each year.

The rooftop system generates 90 kWh daily and 2,700 kWh every month.

Ramoliya said the project was designed to ensure residents have sufficient spare space even after the rooftop system is installed.

In another example of the success of residential rooftop solar, an apartment complex in Bengaluru saved up to ₹4 million (~$47,768) annually by installing solar panels. By switching to clean energy, the condominium with 1,030 flats has reduced its electricity expenses by 33%.

According to Mercom India’s Q3 2025 India Rooftop Solar Market Report, residential installations led rooftop capacity additions with 1,526 MW, accounting for 73% of the 2.1 GW installations during the quarter.

Mercom India hosts a multicity ‘C&I Clean Energy Meet’ series designed to provide commercial and industrial energy buyers with the knowledge and tools they need to adopt clean energy solutions and lower their power costs. The next C&I Clean Energy Meet will be held in Nashik on January 9, 2026.