Golden Ray Solar
Updated 06 Mar 2026 · 2 min read
How much will solar cost me? It is the first question every homeowner asks. And the honest answer is: it depends. System size, roof type, equipment quality, and whether you claim the PM Surya Ghar subsidy all affect the final number. What you read on social media or hear from a neighbour may not apply to your specific situation.
In Kerala, solar installation costs are broadly in line with national averages, but local factors like KSEB tariff structure, net metering rules, and Kerala's monsoon climate affect both cost and return on investment.
This guide gives you realistic, up-to-date price ranges for different system sizes — and explains what factors push the cost up or down for your home.
Quick Summary
- A 1 kW solar system costs approximately ₹60,000–₹80,000 before subsidy
- A 3 kW system (most common for Kerala homes) costs ₹1.1 lakh–₹1.6 lakh before subsidy
- PM Surya Ghar subsidy covers ₹30,000 for 1 kW and up to ₹78,000 for 3 kW
- The right system size depends on your monthly KSEB bill and energy consumption
- Getting 3+ quotes through Flarize ensures you do not overpay
Solar System Cost by Size — Kerala Reference Guide
| System Size | Before Subsidy (₹) | Subsidy (₹) | Net Cost (₹) | Payback Period |
|---|---|---|---|---|
| 1 kW | 60,000 – 80,000 | 30,000 | 30,000 – 50,000 | 3-4 years |
| 2 kW | 90,000 – 1,20,000 | 60,000 | 30,000 – 60,000 | 3-5 years |
| 3 kW | 1,10,000 – 1,60,000 | 78,000 | 32,000 – 82,000 | 4-6 years |
| 5 kW | 1,80,000 – 2,50,000 | 78,000 (capped) | 1,02,000 – 1,72,000 | 5-7 years |
| 10 kW | 3,50,000 – 5,00,000 | Nil (commercial) | 3,50,000 – 5,00,000 | 6-8 years |
What Affects Your Final Cost?
- Roof type — RCC roofs are cheapest to install on; sloped tile roofs cost more
- Panel quality — Tier 1 branded panels cost more but last longer in Kerala's heat and humidity
- Inverter type — String inverters are cheaper; hybrid inverters cost more
- Electrical panel condition — Older homes may need MCB panel upgrades before solar is connected
- Floor height — Multi-storey buildings require more labour and safety equipment
How to Calculate the Right System Size for Your Home
Step 1: Look at your KSEB bill and note your monthly units consumed (kWh). Step 2: Divide by 30 to get daily consumption. Step 3: Divide by 4 (Kerala's average peak sun hours) to get approximate kW needed. Example: 300 units per month ÷ 30 = 10 units per day ÷ 4 = 2.5 kW system needed.
How Flarize Helps You Get the Best Price
Flarize connects you with multiple verified, MNRE-empanelled solar installers in your area. Instead of accepting the first quote you receive, you can compare multiple offers on the same system specifications — ensuring fair pricing and full accountability.
Check Subsidy Eligibility
Find out which government subsidies you qualify for.
For most Kerala homes with a monthly KSEB bill of ₹1,500–₹3,000, a 2–3 kW system is the optimal choice — providing the best balance of upfront cost, subsidy eligibility, and payback period.
System size should be calculated based on your actual consumption, not on what a salesperson recommends. Oversizing adds cost without proportional benefit under KSEB's net metering policy, which caps export credits.
