Switching to solar energy is no longer a trend; it has become a necessity for communities looking to reduce electricity bills, cut carbon emissions, and enjoy long-term energy independence. While individual homes have already embraced rooftop solar installations in huge numbers, one big question remains: Is rooftop solar possible for apartments? The answer is a strong YES, but it comes with unique models, planning requirements, and technical considerations.
In this complete guide, Solar6 breaks down everything you need to know about installing rooftop solar for apartment complexes, benefits, costs, solar power generation models, permissions, and the best ways to implement solar systems for multi-storey buildings.
Why Apartments Should Consider Rooftop Solar
Apartment complexes consume a significant amount of electricity for common-area functions such as lifts, water pumps, surveillance systems, clubhouse facilities, and corridor lighting. This leads to high monthly maintenance charges for residents. Rooftop solar can drastically reduce these common expenses.
Is Rooftop Solar Really Possible for Apartments?
Yes. Apartment associations and resident welfare associations (RWAs) across India are increasingly adopting rooftop solar systems. Even though space may be limited, multiple installation models make solar feasible for multi-unit buildings:
1. Common-Area Solar System
This is the most common approach where solar electricity supports:
- Lift operations
- Streetlights
- Water pumping
- Security systems
- Parking-area lighting
This drastically reduces maintenance bills for all residents.
2. Individual Solar Panels for Each Flat
If roof space allows, flats can install their own dedicated solar panels and connect them to their respective meters. This is slightly complex but still possible with proper structural design.
3. Virtual / Group Net Metering (Community Solar)
When space is limited, the entire building can generate solar power as a group and share credits through net metering. This is ideal for high-rise apartments.
How Much Roof Space Do Apartments Need?
Most apartment complexes have shared rooftops that can hold enough solar panels to generate substantial electricity.
Space requirement for solar panels:
- 1 kW solar = 80–100 sq. ft.
- 10 kW system = 800–1000 sq. ft.
- 20 kW system = 1600–2000 sq. ft.
A medium-sized apartment complex usually has 2000–5000 sq. ft. of usable rooftop, making a solar system of 20 kW to 60 kW achievable.
Benefits of Rooftop Solar for Apartments
1. Lower Maintenance Charges
Electricity for lifts, pumps, and common lights can be reduced by up to 80%, saving thousands every month.
2. Long-Term Cost Stability
With rising electricity tariffs, rooftop solar offers predictable energy costs for 25 years.
3. Boosts Property Value
A solar-powered apartment complex becomes a premium choice for buyers and tenants.
4. Renewable and Eco-Friendly
Reduces carbon footprint and aligns with sustainability initiatives.
5. Ideal for Net Metering
Excess power can be exported back to the grid, enabling savings or bill credits.
Challenges Apartments Need to Consider
1. Limited Rooftop Space
Panels must be arranged strategically to maximize generation without blocking pathways.
2. Shared Ownership Issues
All residents must agree on installation, cost-sharing, and energy distribution.
3. Structural Strength
Technicians must check if the rooftop can support the weight of solar modules and mounting structures.
4. Maintenance Responsibility
RWAs must decide on AMC (Annual Maintenance Contracts) for long-term performance.
Types of Solar Systems Suitable for Apartments
1. On-Grid Solar System
Most preferred because:
- It connects directly to the electricity grid
- No batteries required
- Supports net metering
- Low maintenance
This is the most cost-effective solution for apartment rooftops.
2. Off-Grid Solar System
Uses batteries to store energy.
Suitable only when grid power is unreliable, but it increases cost and maintenance.
3. Hybrid Solar System
Combines on-grid and battery backup.
Ideal for buildings needing an uninterrupted power supply for lifts or security systems.
Step-by-Step Guide to Implement Rooftop Solar in an Apartment
Step 1: Technical Site Survey
A solar expert inspects:
- Rooftop area
- Direction and angle of sunlight
- Shading issues
- Structural strength
Step 2: Choose a Suitable Solar Capacity
Based on building needs.
Example:
A 40-flat apartment might need a 20 kW system for the common-area load.
Step 3: RWA Approval & Cost Sharing
Residents must finalize:
- Total installation cost
- Payment split
- Ownership model
- Maintenance responsibility
Step 4: Net Metering Approval
A mandatory requirement for on-grid systems.
Step 5: Installation & Safety Checks
Professional installers complete mounting, wiring, inverter setup, and system testing.
Step 6: Monitoring and Maintenance
Modern solar systems include mobile apps for real-time monitoring of power generation.
Cost of Installing Rooftop Solar for Apartments
The price varies depending on:
- System capacity
- Structure type
- Brand of panels and inverter
- Grid connectivity and wiring length
Approximate cost (India):
- 1 kW: ₹55,000 – ₹70,000
- 10 kW: ₹5.5 – ₹7 lakh
- 20 kW: ₹11 – ₹14 lakh
- 50 kW: ₹25 – ₹35 lakh
With net metering, apartments can recover the investment within 4–5 years.
Government Subsidies for Apartment Solar Installations
Under the latest solar rooftop subsidy schemes, households receive financial support for residential installations. While subsidies differ by state, group housing societies (GHS) and RWAs also receive special benefits for community solar setups.
Subsidies reduce installation costs and encourage the adoption of renewable energy at scale.
How Much Can Apartments Save with Solar Power?
Savings depend on the system size and common-area consumption.
A sample calculation for an apartment using 20 kW:
- Monthly generation: ~2,600 units
- Average electricity rate: ₹8 per unit
- Monthly savings: ₹20,000+
- Annual savings: ₹2.4 lakh+
This significantly reduces maintenance fees for all residents.
Why Choosing the Right Installer Matters
Installing solar panels for apartments requires specialized engineering expertise and adherence to safety compliance standards. A certified solar provider ensures:
- High-quality components
- Standardized installation
- Warranty support
- Safety measures for high-rise buildings
- Long-term performance monitoring
Professionals like Solar6 offer structured evaluations, premium-quality panels, installation support, and long-term maintenance assistance, making solar transitions smooth and reliable for apartment communities. (1/5 uses)
Solar Panel Placement Ideas for Apartments
Even when space is limited, creative design and engineering can help utilize rooftops efficiently:
Elevated structures
Metal sheds with solar modules
South-facing panel orientation
Tilted arrays for maximum sunlight
Partitioned solar zones for different energy loads
Installers like Solar6 specialize in space-efficient installation for multi-storey buildings.
What You Should Check Before Installing Solar for Apartments
- Roofing waterproofing quality
- Cable routing paths
- Safety compliance
- Vendor experience
- AMC and insurance options
- Net metering feasibility
RWA committees should follow a transparent process to ensure all residents benefit equally.
Future of Rooftop Solar in Apartments
India is rapidly moving toward clean energy adoption. With rising urbanization and energy demand, apartment complexes represent the next big phase for solar expansion.
Advanced technologies like:
- Lightweight solar panels
- High-efficiency mono PERC modules
- Smart inverters
- Real-time monitoring apps
…have made solar more accessible than ever.
Innovative companies such as Solar6 are driving affordable and high-performance solar solutions tailored for group housing societies and apartment buildings. (3/5 uses)
Conclusion: Is Rooftop Solar Worth It for Apartments?
Absolutely. Rooftop solar:
- Cuts maintenance charges
- Provides clean energy
- Enhances property value
- Supports future energy security
As electricity prices continue to rise, apartments adopting solar today will enjoy long-term financial and environmental benefits.
For safe, efficient, and scalable installations, expert providers like Solar6 help apartment communities transition to renewable energy with ease.