📋 Table of Contents
- Project Overview & Highlights
- The Fire Extinguishers on the Wall — How a Solar System Is Made Fire-Safe
- Three Inverters, Three DC/AC Panel Sets
- Net Metering With BYPL Explained
- Real Savings — What This Property Now Earns
- What Thermosun Handled — Start to Finish
- Why Choose Thermosun
- Frequently Asked Questions
Most solar photos show panels. This one, taken beside the inverters at a Bahubali Enclave property in Anand Vihar, shows something less usual: three red fire extinguishers mounted on the wall right next to the equipment. On 28 October 2026, Thermosun completed an 11kW rooftop solar installation here, and those extinguishers are a good reason to talk about a topic most solar companies avoid — fire safety. Rooftop fires from a well-installed solar system are rare, but “rare” is not the same as “never”, and the details that prevent them are worth knowing before you choose who installs your solar system.
Project Overview & Highlights
This Anand Vihar installation sits on a large braced galvanized steel frame over the water tank and staircase headroom, with open space beneath. Here’s exactly what was delivered:
Is Your Existing Solar System Safe and Well Maintained?
A good solar installation company Delhi families trust doesn’t disappear after handover. Ask for a free safety and maintenance check of your system, or a full survey if you’re planning a new one.
📞 Call Now 📄 Free Site SurveyThe Fire Extinguishers on the Wall — How a Solar System Is Made Fire-Safe
🔥 The Honest Picture
Fires linked to rooftop solar are uncommon, and when they happen they usually trace back to installation or maintenance problems rather than to the panels themselves. Safety isn’t one feature — it’s dozens of small details done correctly.
The usual culprits are loose or poorly made electrical connections that heat up under load, undersized or damaged cables, water getting into junction boxes, inverters without enough airflow, and combustible material stored or hung next to the equipment. A well-built solar system tackles each of these:
✅ What Good Practice Looks Like
- Proper connectors and crimping: matched, properly crimped connectors rather than loose or mixed-brand joints, which are a classic source of heat.
- Correct, protected cabling: cables sized for the current, UV-resistant on the roof, and run in conduit or on a tray so they aren’t chafed or exposed.
- Isolation and protection devices: DC isolators and fuses on the panel side, MCBs and isolators on the grid side, plus surge protection — all visible in the panel boxes next to each inverter here.
- Earthing: every metal part bonded to earth so faults have a safe path.
- Clearance and airflow: inverters mounted with space around them, and the area kept free of clutter, clothes lines and stored items.
- Extinguishers within reach: as at this property, compact extinguishers mounted next to the equipment, so a small incident can be dealt with immediately.
🚨 If Something Does Go Wrong
- Don’t use water on energised electrical equipment. Use an extinguisher suitable for electrical fires (typically CO₂ or dry powder).
- Switch off at the AC MCB/isolator and the DC isolator if it’s safe to do so — but remember that in daylight the panels keep producing DC power, so the cables on the panel side can stay live even after the inverter is off.
- Call the fire services on 101 (or 112) for anything beyond a very small incident, and tell them it’s a rooftop solar system.
It’s also worth having the system looked over periodically — connectors, boxes, cable condition and inverter vents — which is exactly what a proper annual maintenance visit covers.
Three Inverters, Three DC/AC Panel Sets
This 11kW system is split across three grid-tied inverters, each mounted with its own DC panel box (panel side) and AC panel box (grid side) along a single cable tray. Larger solar systems are commonly divided across several inverters rather than one large unit, and the clear, separate labelling of each set makes the layout easy to isolate and service.
Net Metering With BYPL Explained
Anand Vihar falls under BSES Yamuna Power Limited (BYPL), which serves East and Central Delhi. After commissioning, Thermosun filed the net metering application with BYPL, coordinated the inspection of the multi-inverter installation, and had the bi-directional meter installed. That meter records the units you draw from the grid and the surplus your system exports separately, and BYPL nets the two off at each billing cycle.
Real Savings — What This Property Now Earns
With the array generating power and net metering active through BYPL, here’s the estimated monthly financial picture for this 11kW system. Actual figures depend on consumption, season and panel cleanliness:
| Benefit | Monthly Value | Annual Value |
|---|---|---|
| Bill Reduction via Net Metering | ₹10,000 – ₹13,000 | ₹1,20,000 – ₹1,56,000 |
| Delhi GBI | Eligibility confirmed at registration — not included in this estimate | |
📊 Solar Subsidy for a Larger System Like This
For residential systems of 3kW and above, the currently documented structure is the ₹78,000 PM Surya Ghar central subsidy plus up to ₹78,000 in Delhi state capital subsidy — a combined ₹1.56 lakh, which doesn’t increase with system size. For a larger installation like this 11kW one, exactly what applies — including the Delhi GBI, whose documented slabs cover systems up to 10kW — depends on how the property’s connections are registered and on the current portal rules, so Thermosun confirms eligibility before filing rather than assuming it. See our Delhi Solar Subsidy 2026 guide for what’s confirmed and what isn’t.
What Thermosun Handled — Start to Finish
- 1Site Survey & Load Assessment Roof area, shading, water tank and staircase headroom, and the property’s consumption assessed to size the system.
- 2Braced Frame Design Large galvanized steel frame designed with diagonal bracing and open space beneath.
- 3Procurement of ALMM-Approved Components Panels and inverters sourced from the MNRE-approved list for subsidy eligibility.
- 4Panel Installation Full 11kW array mounted and wired across the raised frame.
- 5Inverter, Panel Box & Safety Setup Three inverters installed with their own DC/AC boxes, tidy cable tray and extinguishers on the wall.
- 6Safety Compliance Earthing and protective wiring documented to IS standard.
- 7BYPL Inspection & Net Meter Net metering application filed, inspection coordinated, bi-directional meter installed.
- 8Subsidy Eligibility & Filing Eligibility for the central and Delhi benefits checked and filed as applicable, with bank details confirmed for DBT processing.
Anand Vihar, Vivek Vihar & Across East Delhi — We Cover Your Area
As a solar EPC company in Delhi handling design, installation, safety, net metering and subsidy paperwork, Thermosun serves Anand Vihar, Preet Vihar, Patparganj and the wider BYPL belt directly.
💬 WhatsApp Now 📄 Free Site SurveyWhy Choose Thermosun
Safety is the part of solar that never shows up in a price comparison, and the part you’ll care about most if something ever goes wrong. Our work has included projects at Delhi Fire Stations, where safety expectations are far higher than on a typical rooftop, and we carry that standard into every rooftop solar installation Delhi homeowners and businesses trust us with. With over 1,000 installations behind us, that attention to the unglamorous details is a large part of why customers call Thermosun the best solar company in Delhi for solar for home projects where reliability and safety matter as much as the quote.