Engineered by Er. Dhramveer Joshi, M.Tech (Electrical Power Systems)
Rooftop solar is an active electrical generation plant connected to your home's distribution bus. With hands-on experience in designing MW-scale Solar PV plants (3 MW – 8.48 MW), SLDs, cable sizing, earthing/LPS systems, and DBR reports, Er. Dhramveer Joshi scrutinizes inverter harmonic distortion (THD < 3%), chemical earthing resistance (< 5Ω), and DCR cell pedigree so your investment lasts 25 years without catastrophic failures or subsidy forfeiture.
Adjust your monthly bill and sanctioned load to simulate 25-year financial returns and government subsidy.
Configure Your Property
Live MNRE PM Surya Ghar calculations
2026 Rules
Premises Category
Avg Tariff: ₹7.5/unit•Sun Hours: 4.8 hrs/day
Electricity Consumption
₹
₹1,000₹15,000₹30,000₹50,000+
4 kW
Mentioned on your DISCOM electric bill
400 sq ft
~85 sq ft needed per kW capacity
Your shadow-free roof area (400 sq ft) accommodates up to 4.7 kW. Sizing adjusted accordingly.
DISCOM net metering is capped at 100% of your sanctioned load (4 kW). We recommend applying for a load enhancement or sizing up to 4 kW.
Unbiased Sizing
4.7 kWp Rooftop Solar Plant
Generates ~582 units/month • Requires 408 sq ft terrace
Capex Payback
2.9 Years
Free power thereafter
Benchmark Cost
₹2,53,800
Tier-1 DCR
Central CFA
-₹78,000
Direct DBT
State Top-Up
-₹21,615
State Nodal
Net Investment
₹1,54,185
After all subsidies
Annual Savings
₹52,380 / yr
25-Yr Cumulative
₹20,35,060
Lifetime CO2 Offset
135 Tonnes
Net Capex Breakeven at Year 2.9Total Profit: ₹18,80,875
Electrical Architecture
Grid-Connected Solar Power System Single Line Diagram
Inspect the exact protection sequence and components required for safe, CEA-compliant DISCOM net-metering.
Electrical Schematic (SLD)
Grid-Connected Solar Rooftop Single Line Diagram
Curated by Er. Dhramveer Joshi, M.Tech
Click any electrical component below to inspect engineering ratings and safety standards:
DC Generation Subsystem
Solar Photovoltaic Array (DCR TOPCon / Mono PERC)
Cell Technology
N-Type TOPCon / Bifacial Half-Cut
Nominal Module Voc
49.8 V
Short Circuit Current (Isc)
13.9 A
Temperature Coeff. (Pmax)
-0.30 %/°C
Degradation Rate
≤ 0.4% / year (30 yr warranty)
Chief Engineer's Technical Assessment
Mandatory ALMM List-I Indian DCR compliance. Modules wired in series strings to achieve optimal MPPT voltage window at peak summer operating temperatures (65°C).
Mandatory Technical Standards
IEC 61215 / IEC 61730 / MNRE DCR Mandate
National Coverage
Rooftop Solar Guides across India
DISCOM net-metering regulations, solar yields, and state subsidies across capital cities and tier-2/3 industrial centers.
Expert solar panel maintenance tips for Indian rooftops. Learn seasonal cleaning, inverter health checks, wiring inspections, and monitoring strategies to protect your 25-year solar investment.
Detailed engineering comparison of on-grid vs off-grid solar systems for Indian homes. Understand net metering, battery backup, costs, ROI, and which system suits your load profile in 2026.
Comprehensive solar inverter price list for India in 2026. Compare string, micro, and hybrid inverter costs from Growatt, Havells, Fronius, Huawei, Goodwe. Expert buying tips by Er. Dhramveer Joshi.
Expert guide to the best solar batteries for Indian homes in 2026. Compare LiFePO4 and lead-acid batteries by price, cycle life, usable capacity, and brand. Recommendations by Er. Dhramveer Joshi.
Complete guide to solar panel warranties in India. Understand product warranty vs performance guarantee, DCR panel warranty terms, claim process, and how to protect your 25-year investment.
Professional solar panel cleaning tips for Indian conditions. Learn safe cleaning methods, optimal frequency, water quality, tools, and cost-effective strategies to recover up to 25% lost generation.
Lump-sum opaque quote with hidden charges for meter testing, earthing, and liaison
Mounting Structure Standards
Mandatory 80-micron Hot-Dip Galvanized Iron (HDGI) tested for 150 km/h wind speeds
Often uses cheap 30-micron Pre-Galvanized steel that rusts within 3 monsoons
DISCOM Net-Meter Liaison
Full engineering documentation support, load enhancement advice, & grievance escalation
Leaves the homeowner alone to negotiate with local line staff and junior engineers
Consumer Privacy & Spam
100% Spam-Free. You speak strictly with 1 dedicated certified solar engineer
Your phone number is sold/shared across 15+ sub-dealers who hound you with calls
Verified Results
Proven Savings Across Indian Cities
Homeowners and housing societies who leveraged our advisory calculations to eliminate electric bills.
Gurugram (DLF Phase 4)
Sanjiv Mehta (Independent Villa)
6 kWp Bifacial TOPCon
Bill Before₹16,500 / month
Bill After₹650 (Fixed Charges)
“SolarAdviser caught that our local installer was supplying non-DCR panels which would have cost us ₹78k in lost subsidy. Their quotation audit saved us ₹45,000 on the spot.”
Subsidy Claimed:₹78,000 (Central CFA)
South Delhi (Greater Kailash II)
Dr. Ananya Roy
4 kWp N-Type Mono
Bill Before₹11,200 / month
Bill AfterZero Electricity Bill + GBI Credit
“The SolarAdviser team guided us through BSES Rajdhani net-metering without any corruption or delay. Seamless 22-day turnaround from application to commissioning.”
Subsidy Claimed:₹78,000 CFA + Delhi GBI ₹3/u
Pune (Baner)
Emerald Heights Housing Society (RWA)
42 kWp Common Meter Plant
Bill Before₹94,000 / month (Lifts & Pumps)
Bill After₹8,200 / month
“We presented SolarAdviser's technical feasibility report to our RWA General Body Meeting. The transparent 25-year financial model won 100% committee approval.”
Subsidy Claimed:₹7,56,000 (RWA Subsidy)
Local DISCOM Guidelines
Explore Solar Sizing & Subsidies in Your City
Select your city to view local net-metering regulations, sanctioned load rules, and average solar irradiation yields.
Everything you need to know about PM Surya Ghar subsidies, net metering, and quotation audits.
Solar Adviser was founded and engineered by Er. Dhramveer Joshi, M.Tech in Electrical Power Systems. A practicing Sr. Solar Design Engineer with hands-on expertise in MW-scale Solar PV plants (3 MW – 8.48 MW), SLD preparation, cable sizing, and earthing/LPS systems, Er. Joshi curates all technical feasibility models to ensure 100% CEA and MNRE compliance.
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