Golden Ray Solar
Updated 06 Mar 2026 · 2 min read
When you receive a solar quote, it is usually a single number — say ₹1,20,000 for a 3 kW system. But what is actually inside that number? How much of it is for the panels, how much for the inverter, and how much is the installer's margin?
Understanding this breakdown is not just academic. It helps you evaluate competing quotes, identify where a contractor is cutting corners, and make an informed decision about where to spend more and where to be flexible.
This article breaks down a typical Kerala rooftop solar quote into its real components — and explains what each one is worth.
Quick Summary
- Panels typically account for 40–50% of total system cost
- The inverter is the second biggest cost at 15–20%
- Mounting structure, wiring, and labour make up the remaining 30–40%
- Premium panels and inverters have longer lifespans and better warranties
- Cutting cost on inverters or wiring is where most long-term problems start
Equipment vs. Soft Costs: The Real Split
Solar costs fall into two broad categories. Equipment costs (what you can see and touch): solar panels, inverter, mounting structure, wiring and cables, AC isolator, DC fuses, and earthing kit. Soft costs (what you pay for but cannot hold): installation labour, design and site survey, permit and net metering fees, subsidy processing support, and warranty and after-sales service.
Detailed Cost Breakdown for a 3 kW System
| Component | Cost Range (₹) | Notes |
|---|---|---|
| Solar Panels (3 kW) | 60,000 – 75,000 | Depends on brand (Tier 1 vs generic) |
| Grid-Tied Inverter | 18,000 – 30,000 | Brand matters for warranty |
| Mounting Structure | 12,000 – 18,000 | GI or aluminium; monsoon-resistant |
| DC & AC Wiring | 6,000 – 10,000 | Wire gauge affects long-term performance |
| Safety Equipment | 3,000 – 6,000 | Fuses, earthing, lightning arrestor |
| Labour | 10,000 – 18,000 | Varies by roof type and location |
| Permits & Net Meter | 5,000 – 8,000 | KSEB charges — fixed |
| Commissioning & Docs | 2,000 – 5,000 | Subsidy paperwork support |
| Total | 1,16,000 – 1,70,000 | Before PM Surya Ghar subsidy |
Where to Spend More and Why It Matters
Spend more on: panels (a better panel lasts 25+ years vs 15 years for cheap alternatives), inverter (quality inverters have better surge protection, longer warranties, and remote monitoring), and wiring (undersized cables heat up and degrade, creating fire risk and energy loss). Where you can be flexible: mounting structure brand, monitoring app, and aesthetic cable management.
How to Read a Solar Quote Like a Professional
Ask your installer to provide: panel brand, model, and wattage per panel; inverter brand, model, and warranty period; mounting structure material (GI or aluminium); wire specifications (cable size in sq mm); itemised labour and permit costs. If a quote is missing any of these, ask for it. A professional installer should provide this without hesitation.
Check Subsidy Eligibility
Find out which government subsidies you qualify for.
The inverter is the component most likely to need replacement during a solar system's lifetime. Choosing a quality inverter with a 10-year warranty upfront can save ₹25,000–₹40,000 in replacement costs over 15 years.
Do not accept a quote that does not itemise costs by component. A bundled price with no breakdown makes it impossible to compare quotes or hold the installer accountable for the equipment they use.
