Not every rooftop is a flat, open slab with a clear southern sky. Rohini’s residential areas — a mix of independent floors, DDA houses, and builder constructions — often feature rooftops with water tanks, parapet obstructions, and structural elements that make standard low-angle panel mounting a compromise. When the layout demands a smarter solution, that is where engineering experience makes all the difference.
On 18 July 2026, Thermosun completed a rooftop solar installation at G-17/25, Sector 15, Pocket 17, Rohini — featuring an elevated galvanized mounting structure and a dual-inverter configuration. This is not a typical flat-panel installation. It is a purpose-engineered system designed to maximise solar energy generation on a roof with specific spatial constraints, while also creating usable covered space below the panel array. As the best solar company in Delhi, Thermosun designs every system around what the specific property actually needs — not a one-size-fits-all template.
Project Overview & Highlights
This Rohini installation was designed to solve a real rooftop challenge — obstructions that would shadow a standard ground-level panel layout. The elevated mounting structure lifts the entire panel array above the obstacle line, restoring full unshaded exposure to the sky. Here is the complete specification of what was delivered:
- High-Efficiency Monocrystalline Solar Panels
- Elevated Galvanized Steel Mounting Structure
- Dual Tata Power Solar Inverters — Wall Mounted
- MNRE Approved Panels — 25 Year Performance Warranty
- Complete DC & AC Wiring — Conduit Protected
- Protection Devices — MCB, SPD, Isolator
- Earthing & Lightning Arrester — IS Standard
- TPDDL Net Metering Application Filed
- PM Surya Ghar Subsidy Processing Complete
- GPS-Tagged & Documented Project Completion
What Makes This Installation Unique — Elevated Mounting Explained
The standard approach to rooftop solar is a low-angle mounting frame sitting 6–12 inches above the roof slab at a fixed tilt of 10–15 degrees. It works perfectly on open, obstacle-free rooftops. But Rohini’s residential buildings — particularly DDA and older independent floors — frequently have water tanks, overhead tanks, staircases, and parapet walls that cast shadows across the roof at different times of day.
Shadow on even a single panel in a solar string reduces the output of the entire string — not just that one panel. This is called the “partial shading effect,” and it is one of the most common and preventable causes of solar underperformance in urban Delhi installations.
🏗️ How the Elevated Structure Solves This
In this Rohini project, Thermosun installed a heavy-duty galvanized steel column structure that raises the panel array 6–8 feet above the rooftop level. This elevation places the panels completely above the shadow line of all roof obstructions — water tanks, parapet walls, and neighbouring structures — ensuring full, unshaded sky exposure throughout the day. The panels generate at maximum rated output from morning to evening.
🚗 Bonus — Usable Covered Space Created Below
An often-overlooked benefit of elevated solar mounting: the space beneath the panel canopy becomes naturally shaded and usable. In this Rohini installation, the elevated array creates a covered rooftop area suitable for parking, storage, or a shaded sitting area. The solar system effectively delivers two benefits simultaneously — clean solar energy generation above and functional covered space below.
Dual Inverter Setup — Why Two Units Were Installed
The second photograph from this Rohini project shows something worth explaining — two Tata Power Solar inverters mounted side by side on the wall, each with its own generation meter box. This is a deliberate engineering choice, not a redundant one.
🔌 Why Two Inverters Instead of One
When a solar system’s total capacity exceeds the practical rated output of a single inverter, or when the panel array is split into two independent strings due to roof orientation, using two inverters is the correct engineering decision. Each inverter handles its own panel string independently — meaning if panels on one side of the roof face slightly different orientations or have marginally different shading patterns, each string is optimised separately rather than being averaged together. This configuration consistently outperforms a single large inverter on multi-orientation roof layouts.
🛡️ Redundancy — The Hidden Benefit
Dual inverters also provide built-in redundancy. An inverter is the most service-prone component in any solar system — it handles the conversion of DC solar power to AC grid power under constant load. If a single inverter system requires servicing, the entire installation stops generating for the duration of the repair. With two units, a service event on one inverter means the other continues generating — the system never goes fully offline. For residential solar panels, this continuity matters. Tata Power Solar inverters used here carry the manufacturer’s warranty and have a strong service network across Delhi NCR.
Real Savings — What This Rohini Home Now Earns Every Month
With TPDDL net metering active and Delhi GBI running, here is what this household’s financial picture looks like going forward — based on Delhi’s current tariff structure and solar irradiance data:
| Benefit | Monthly Value | Annual Value |
|---|---|---|
| Bill Reduction via TPDDL Net Metering | ₹3,500 – ₹5,000 | ₹42,000 – ₹60,000 |
| Delhi GBI (₹2–₹3/unit generated) | ₹800 – ₹1,400 | ₹9,600 – ₹16,800 |
| Total Monthly Financial Benefit | ₹4,300 – ₹6,400 | ₹51,600 – ₹76,800 |
📊 Government Benefits — PM Surya Ghar + Delhi GBI Together
One-time PM Surya Ghar subsidy: up to ₹78,000 credited to bank account post-commissioning. Delhi GBI over 5 years adds another ₹57,600–₹1,00,800 based on actual generation. Combined, government support on this single installation exceeds ₹1.35 lakh–₹1.78 lakh — reducing the net solar panel cost significantly and shortening the payback period to just 4–5 years.
After payback, this home generates essentially free solar energy for another 20+ years.
What Thermosun Handled — Start to Finish
This Rohini project required more engineering planning than a standard flat-roof installation. Thermosun’s team managed every aspect — from structural design of the elevated mounting to TPDDL net metering and subsidy coordination:
- 1 Free Site Survey & Shadow Analysis — Roof assessment identifying obstruction shadow lines, confirming elevated mounting requirement and optimal column placement
- 2 Custom Mounting Design — Elevated GI steel column structure engineered to clear all shadow-casting obstructions on this specific rooftop
- 3 TPDDL Feasibility Application — Grid connection approval filed with Tata Power-DDL before installation commenced
- 4 Panel & Inverter Installation — MNRE-approved monocrystalline panels on elevated structure; dual Tata Power Solar inverters wall-mounted with neat conduit wiring
- 5 Safety Compliance — Earthing, lightning arrester, protection devices, and IS standard compliance verified and documented
- 6 TPDDL Inspection Coordination — Work completion report submitted, DISCOM engineer inspection scheduled and managed
- 7 Net Meter & Subsidy — Bi-directional DLMS net meter installed by TPDDL; PM Surya Ghar subsidy application filed and processing confirmed
Why Thermosun for Solar Installation in Rohini & North Delhi
This Rohini project illustrates exactly why experience matters in residential solar installation. A less experienced vendor might have quoted a standard flat-mount system and left the homeowner with a chronically underperforming installation due to shading. Thermosun’s site survey identified the constraint, designed the right structural solution, and delivered a system that generates at full rated output every day. That is what the best solar company in Rohini actually does — it solves problems, not just installs panels.
🏗️ 1,000+ Real Installations
Every roof is different. Our experience across 1,000+ Delhi NCR installations means we have encountered — and solved — every type of rooftop challenge, including elevated mounting, multi-orientation roofs, and society installations.
✅ MNRE Approved & TPDDL Registered
Registered on pmsuryaghar.gov.in. Empanelled with TPDDL, BRPL, and BYPL. Every installation is subsidy-eligible and qualifies for Delhi GBI from day one of commissioning.
🏛️ Government Project Credentials
Successfully delivered solar at Delhi Fire Stations, Tees Hazari Court, and Tihar Jail — institutional-grade quality standards applied to every residential project.
🔧 Solar Panel Maintenance & AMC
Post-installation Annual Maintenance Contracts cover scheduled solar panel maintenance, inverter health checks, and performance monitoring — keeping your system at peak output year-round in Delhi’s dusty climate.
Frequently Asked Questions
Conclusion
The Rohini Sector 15 installation is a reminder that good solar design is not just about putting panels on a roof — it is about engineering a system that performs at maximum output for 25 years, regardless of the rooftop’s specific constraints. The elevated mounting structure eliminated shading losses that would have permanently reduced this system’s financial return. The dual-inverter configuration optimised performance across the panel layout and added resilience. The result is a system that delivers on its savings promise, every single day.
If you are in Rohini, Pitampura, Shalimar Bagh, or anywhere in North Delhi and you are thinking about residential solar installation, the starting point is always a free site survey. Our engineers will assess your roof honestly — and if a standard mount does the job, that is what we will recommend. If your roof needs a smarter solution, we will design it and price it transparently before you commit to anything.