As electricity costs continue to rise and sustainability becomes a shared responsibility, apartments and housing societies across India are actively exploring cleaner and smarter energy solutions. One of the most effective and future-ready options is installing a Rooftop Solar Plant.
At Trom Industries Limited, we work closely with residential communities to help them transition to reliable solar power systems that reduce electricity bills, ease grid dependency, and contribute to a greener environment. In this article, we explain everything housing societies and apartment associations should know before installing a rooftop solar plant—from how it works to long-term benefits and practical considerations.
A Rooftop Solar Plant is a photovoltaic (PV) power system installed on the roof of a building to generate electricity using sunlight. In apartments and housing societies, this system typically supplies power to common areas such as lifts, staircases, parking lights, water pumps, clubhouses, and security systems.
Unlike large ground-mounted solar plants, rooftop systems efficiently utilize existing building roofs and curtain walls—without requiring any additional land resources. This makes them ideal for residential complexes in urban and semi-urban areas.
The residential solar power system uses photovoltaic panels to convert sunlight into electricity. This electricity is then used to run building loads, and surplus power—if available—can be supplied back to the electricity grid.
Solar panels generate electricity during daylight hours
Generated power is first used to meet the building’s internal load
Excess electricity is exported to the grid (in on-grid systems)
The system helps relieve peak electricity demand during daytime hours
This not only reduces monthly electricity bills but also stabilizes power consumption during high-demand periods.
Residential societies often face high recurring electricity expenses for common facilities. A rooftop solar plant directly addresses this issue while offering multiple long-term advantages.
Apartment buildings have large, unused rooftop areas. A rooftop solar plant converts this idle space into a productive energy asset—without affecting daily life or aesthetics when designed professionally.
Solar power offsets grid electricity usage for common services, leading to significant savings in monthly maintenance costs for residents.
Since solar systems generate electricity during the day, they reduce dependence on grid power during peak demand hours, which is when electricity tariffs are often highest.
Using solar energy lowers carbon emissions and supports India’s renewable energy goals. It allows housing societies to actively participate in sustainable development.
Once installed, rooftop solar plants deliver free electricity for 25 years or more, with minimal maintenance costs.
Every apartment complex is different. The ideal rooftop solar plant capacity depends on factors such as roof area, daily electricity consumption, and budget.
At Trom Industries Limited, we offer a wide range of rooftop solar plant capacities—from 1 kW to 1 MW, making our solutions suitable for:
Small apartment buildings
Large housing societies
Gated residential communities
Mixed-use residential complexes
Our experienced team conducts detailed site surveys and energy audits to recommend the most efficient and cost-effective system size.
Connected to the electricity grid
Excess power is exported via net metering
Ideal for societies with stable grid supply
Lower upfront cost
Connected to the grid with battery backup
Provides power during outages
Suitable for areas with frequent power cuts
We help societies choose the right system based on energy needs, grid reliability, and long-term goals.
Net metering is a crucial benefit of installing a rooftop solar plant. It allows housing societies to export surplus electricity to the grid and receive credits on their electricity bill.
This mechanism ensures:
Maximum utilization of generated solar power
Faster return on investment
Transparent billing and energy accounting
Our team assists with the complete net metering approval and documentation process.
At Trom Industries Limited, we believe a rooftop solar plant should be efficient, durable, and future-ready.
A separate, highly qualified, knowledgeable, and experienced solar team
Novel system designs optimized for residential rooftops
High-quality PV modules, inverters, and mounting structures
Full-function systems with safety and performance monitoring
Compliance with all technical and regulatory standards
From design to commissioning, we ensure every rooftop PV system delivers reliable performance for decades.
We follow a structured and transparent installation process to ensure smooth execution:
Site inspection and feasibility analysis
Load assessment and capacity finalization
System design and engineering
Approvals and net metering coordination
Installation and testing
Commissioning and handover
Our approach minimizes disruption to residents while ensuring timely project completion.
Rooftop solar plants are known for low maintenance requirements. Routine cleaning and periodic inspections are enough to keep the system running efficiently.
Typical system lifespan:
Solar panels: 25+ years
Inverters: 8–12 years (replaceable)
With proper maintenance, housing societies can enjoy decades of clean, low-cost electricity.
Residential solar adoption is strongly supported by national and state renewable energy policies. Rooftop solar plants align with long-term energy planning and help societies stay future-ready amid rising electricity costs.
Solar-powered housing societies are increasingly seen as:
More sustainable
Better planned
Higher in long-term property value
We are not just solar installers—we are long-term energy partners.
Proven expertise in rooftop solar projects
End-to-end solutions from 1 kW to 1 MW
Transparent processes and quality-first approach
Dedicated post-installation support
We sincerely welcome your purchase and the opportunity to help your housing society transition to clean solar energy.
Yes. Most apartments and housing societies with sufficient roof space can install a rooftop solar plant after structural and technical evaluation.
On average, 100 square feet of shadow-free area is required per 1 kW of installed capacity.
Yes. Rooftop solar plants are commonly used to power lifts, water pumps, and common lighting systems.
Excess electricity is exported to the grid through net metering, earning bill credits.
Most residential rooftop solar projects are completed within 4–8 weeks, depending on size and approvals.
No. Maintenance costs are low and mostly involve panel cleaning and routine inspections.
Yes. Trom Industries Limited offers rooftop solar plant capacities up to 1 MW for large residential complexes.
A Rooftop Solar Plant is no longer just an alternative—it is a smart, responsible, and financially sound decision for apartments and housing societies. By utilizing unused rooftop space, residential communities can reduce electricity costs, support clean energy, and build a sustainable future.
At Trom Industries Limited, we are committed to delivering high-quality rooftop solar solutions that combine performance, reliability, and long-term value. If your housing society is planning to go solar, we are here to guide you every step of the way.