What Is a Complete Solar Power System for a Home?
A complete home solar power system has five main components. Understanding each helps you evaluate quotes intelligently and avoid overpaying.
The 5 Components of a Home Solar System
1. Solar Panels (PV Modules)
The panels are the most visible part — mounted on your rooftop. In 2026, most residential systems in India use monocrystalline panels rated 400W–550W per panel. Key specs:
- Efficiency: 20–22% for good monocrystalline panels
- Performance warranty: 25 years (guaranteed to produce at least 80% of rated output)
- Top brands: Waaree, Adani, Vikram, Tata Power Solar, Longi, Jinko
- Cost: ₹22–₹30 per watt for the panel alone
2. Solar Inverter
Converts DC power from panels to AC power for your appliances. Types:
- String inverter (most common): One unit for the whole system. Cost ₹15,000–₹40,000 for 1–5 kW. Brands: Growatt, Solis, Goodwe, Delta
- Hybrid inverter: Works with battery backup. Cost ₹35,000–₹80,000. Best for areas with power cuts.
- Microinverter: One inverter per panel. Most expensive but best performance when partial shading is an issue.
3. Mounting Structure
Aluminium or GI steel frame that holds panels on your roof. Cost: ₹6,000–₹15,000 for a 3 kW system. Must be angle-adjustable for your latitude. Elevated structures cost more.
4. Battery (Optional — for Hybrid/Off-Grid Only)
Not required for on-grid systems. For hybrid systems in 2026:
- Lithium-ion (LFP): Best choice — 5–10 year lifespan, no maintenance. Cost: ₹15,000–₹25,000 per kWh of storage. Brands: Luminous, Livguard, Nexcharge
- Lead acid (tubular): Cheaper upfront (₹8,000–₹12,000 per kWh) but shorter lifespan (3–5 years), needs maintenance
For most Indian homes, a 5 kW solar system + 10 kWh lithium battery covers most evening and night usage.
5. Wiring, Earthing & Net Meter
- DC cables: UV-resistant 4mm or 6mm solar cables from panels to inverter
- AC cables: From inverter to your distribution board
- Earthing: Safety requirement — connects metal parts to earth
- Net meter: Bi-directional meter installed by DISCOM, measures export and import
System Size Guide by Home Type (India 2026)
| Home Type | Avg Monthly Units | Recommended System | Approx Cost (After Subsidy) |
|---|---|---|---|
| 1 BHK / Small home | 100–200 units | 1–2 kW | ₹40,000–₹90,000 |
| 2 BHK | 200–350 units | 2–3 kW | ₹80,000–₹1,30,000 |
| 3 BHK with AC | 350–600 units | 3–5 kW | ₹1,20,000–₹2,50,000 |
| 4 BHK / Bungalow | 600–1000 units | 5–8 kW | ₹2,00,000–₹4,50,000 |
| Villa with pool/EV | 1000+ units | 8–15 kW | ₹4,00,000–₹8,00,000 |
On-Grid vs Hybrid — Which System to Choose?
- Grid power is reliable in your area: Choose on-grid. Cheapest, fastest payback, eligible for full subsidy.
- Power cuts 2–8 hours/day: Choose hybrid with 5–10 kWh battery. Adds ₹80,000–₹1,50,000 to cost but gives you backup.
- No grid connection: Off-grid is your only option. Most expensive, plan carefully for cloudy days.
Where to Buy a Complete Solar System in India
You can buy from:
- Installer-supplied turnkey: Most convenient. Installer sources all components, installs, and warrants everything. Recommended for most homeowners.
- Self-sourced + installer for labour: You buy panels and inverter yourself (Industrybuying, Amazon, direct from manufacturer), hire an installer for labour only. Can save 10–20% but you manage warranties separately.
Find solar panel dealers and residential installers in your city on GoSolarIndex.
Typical Complete System Quote Checklist
A good quote for a complete 3 kW on-grid system should include:
- 9 × 335W monocrystalline panels (or 6 × 500W)
- 3 kW string inverter with warranty
- Aluminium mounting structure
- DC and AC wiring and cable trays
- Earthing kit
- Net metering application assistance
- Monitoring app setup
- 1 year free AMC