What Is a Rooftop PV System? How Does It Work?
Rooftop PV is a self-consumption solution: instead of purchasing all your electricity from the grid, you generate it on site. The energy from the panels first covers your building’s demand; any surplus can be exported to the grid (subject to local regulations for small-scale generation) or stored later. This model is particularly attractive for energy-intensive facilities.
A rooftop PV system is not only economical; it is also a responsible investment. Each megawatt installed avoids on average 600–700 tonnes of CO₂ per year, which strengthens sustainability reporting and brand image.
Today, rooftop PV is widely adopted across:
Adoption is accelerating thanks to shorter payback periods and more accessible financing incentives. With solid engineering and quality equipment, a rooftop PV system can operate for 25+ years.
How Does Rooftop PV Work?
The principle is simple: sunlight hits the panels and is converted to electricity; the inverter makes this energy grid-compatible. It is used for your consumption first. The steps below summarise the flow.
1️⃣ Light Capture
Photovoltaic cells in the panels convert light into direct current (DC).
2️⃣ Inverter Conversion
The inverter converts DC into alternating current (AC) that appliances can use.
3️⃣ Self-Consumption First
Generated electricity first covers the building’s needs. Your bill drops immediately.
4️⃣ Grid Interaction
Surplus can be exported or netted off in line with local small-scale generation rules.
5️⃣ Storage (Optional)
Batteries store excess energy for night-time use or during outages.
Why Choose Rooftop PV?
It cuts bills in the short term, pays back in the medium term, and strengthens sustainability and brand value over the long term.
Lower Energy Costs
By meeting self-consumption first, your bill drops immediately. With the right load profile, savings grow fast.
Reduced Carbon Footprint
Roughly 600–700 t of CO₂ avoided per MW installed per year—a strong lever for ESG and tenders.
Protection From Price Volatility
Producing part of your energy improves cost predictability even as tariffs rise.
Site & Brand Value
Switching to green power enhances building value and brand image and helps meet supply-chain requirements.
Rooftop PV Installation Process
A transparent process: site survey and feasibility, followed by design and permits, then mounting and commissioning — with quality checks at every step.
Roof & Load Profile
Assess structure, shading, orientation/tilt, and the facility’s consumption profile.
Capacity & ROI Scenario
Define installed capacity (kWp), estimate annual yield, and calculate payback period.
Structural & Electrical Design
Static adequacy, module layout, inverter selection, and single-line diagrams.
Utility / Regulations
File applications for small-scale generation; obtain permits and grid-connection terms.
On-Site Works
Structure, cabling, inverter commissioning; testing and quality control.
SCADA / Periodic Service
Track production; cleaning and connection checks keep performance on target.
Frequently Asked Questions
Below are concise answers to the questions we get most. Details may vary by project.
