Expert Guide

Babu

Utility Calculators

Solar ROI & Savings Estimator

Quality Inspector

Kaka

Find payback period for solar panels.

📐 Formula & Method

Generation ≈ 4 units/kW/day. Savings = Generation × Rate. Payback = Cost / Annual Savings.

Savings = kW × 4 × 30 × Rate

📋 Worked Example

5kW system at ₹8/unit:
• Generation ≈ 600 units/mo
• Savings ≈ ₹4800/mo

❓ Frequently Asked Questions

What is ROI?

ROI (Return on Investment) in solar is usually reached within 4-5 years in India, after which electricity is free.