Solar ROI
2026 Net Billing Policy · Payback & Savings
Rs. 30,000
Recommended System
4.5kW
Estimated Setup Cost:Rs. 614,250
Estimated Monthly Savings
Rs.17,879
Daytime Self-Consumption:Rs. 15,002
Net Grid Export:Rs. 2,877
Payback Period Timeline2.9 years
Year 0-Investment
★ 2.9 YearsBreak-Even
Year 25+Net Profit
Annual Savings
Rs. 215k
Annual GainMonthly Gen
563 kWh
4.5kW SizeNet Grid Export
274 kWh
Grid Export25-Year Net Savings
Rs. 4.7M
25Y Net profitCarbon Offset
3 Tons of CO2 / Year
Calculations based on 2026 Net Billing policy.
Frequently Asked Questions
Yes, solar is still highly profitable because grid tariffs are extremely high (Rs. 50-65/unit). However, under the 2026 Net Billing policy, the payback period has increased to 3-4 years. Consuming solar energy directly during the day provides the fastest ROI.
NEPRA buys back excess solar units at a national average flat rate of approximately Rs. 10.50 per unit, which is much lower than the import rate of Rs. 50+.
Lithium-Ion batteries have a higher upfront cost but last ~10 years and can be discharged deeply (85% DoD). Tubular batteries are cheaper upfront but last only 3 years, requiring frequent replacements and making Lithium more cost-effective over a 25-year lifetime.