Solar Panel System for House (2026): Sizing, Subsidy & Setup
Complete solar panel system for house guide 2026: Sizing kW capacity, PM Surya Ghar ₹78,000 subsidy benefit, net-metering approvals, and bill elimination.
Sr. Solar Design Engineer, M.Tech (Electrical Power Systems)
Independent rooftop solar engineering advisory & PM Surya Ghar feasibility auditor.
Table of Contents
Installing a solar panel system for house is the most practical way for families to gain independence from skyrocketing summer electricity bills in 2026. With air conditioners, water coolers, and modern electronics driving power consumption higher each year, a rooftop solar setup converts abundant sunlight into free, clean electrical energy right on your terrace. Under the government's flagship PM Surya Ghar Muft Bijli Yojana, homeowners can receive an immediate ₹78,000 direct bank subsidy.
A reliable residential solar installation requires balanced engineering: sizing the photovoltaic array to match household load, installing ALMM-approved DCR modules, selecting a high-efficiency string inverter, and completing DISCOM net-metering liaisoning. In this guide, Er. Dhramveer Joshi explains how to size, install, and optimize a solar panel system for your house.
Residential Sizing Rule: Sizing your system to produce 100% of your average annual consumption ensures your net billing drops to zero while avoiding surplus units that are compensated at lower utility feed-in rates.
1. Sizing Your Solar Panel System for House Based on Load
- 1 kW to 2 kW System (Small House / 1-2 BHK): Generates 4 to 9 units daily. Best suited for basic lighting, ceiling fans, television, and one energy-efficient refrigerator.
- 3 kW System (Standard Indian Home / 2-3 BHK): Generates 12 to 15 units daily. Supports 1-2 inverter ACs, refrigerator, washing machine, water pump, and lights. Qualifies for the maximum ₹78,000 central subsidy.
- 4 kW to 5 kW System (Large House / 3-4 BHK): Generates 16 to 24 units daily. Supports 3-4 air conditioners, microwave, geysers, and domestic appliances.
- 6 kW to 10 kW System (Villa, Joint Family & EV Charging): Generates 25 to 48 units daily. Ideal for multi-story bungalows, electric car charging, and central cooling setups.
2. Financial Breakdown: Cost, Subsidy & Payback Matrix
| System Capacity | Roof Area Required | Gross Capex | PM Surya Ghar Subsidy | Net Cost | Payback Timeline |
|---|---|---|---|---|---|
| 1 kW Setup | 80 – 100 Sq.Ft | ₹55,000 | ₹30,000 | ₹25,000 | 2.2 Years |
| 2 kW Setup | 160 – 190 Sq.Ft | ₹1,10,000 | ₹60,000 | ₹50,000 | 2.3 Years |
| 3 kW Setup (Top Choice) | 240 – 280 Sq.Ft | ₹1,50,000 | ₹78,000 | ₹72,000 | 2.5 Years |
| 5 kW Setup | 400 – 480 Sq.Ft | ₹2,40,000 | ₹78,000 | ₹1,62,000 | 3.1 Years |
| 10 kW Setup | 800 – 950 Sq.Ft | ₹4,50,000 | ₹78,000 | ₹3,72,000 | 3.4 Years |
Calculate Your PM Surya Ghar Subsidy (2026)
Check exact 2026 subsidy eligibility (up to ₹78,000) for your rooftop in under 60 seconds.
Key Questions Answered in This Guide
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