Rooftop Solar & CEB Net Metering Calculator • සූර්ය බලශක්ති සහ විදුලි බිල්පත් කැල්කියුලේටරය
Calculate Sri Lanka rooftop solar PV system savings, CEB/LECO Net Metering, Net Accounting (Rs. 27.06/kWh feed-in tariff), Net Plus, Inland Revenue Act No. 02 of 2025 tax relief, and 20-year ROI payback.
සූර්ය පද්ධති විස්තර (System & Consumption Inputs)
Enter your monthly CEB usage and select your desired solar capacity
Est. current monthly CEB bill: Rs. 23,000
Inland Revenue (Amendment) Act No. 02 of 2025 allows up to Rs. 600,000 deduction on solar costs. Select your APIT marginal tax bracket:
මූල්ය ප්රතිලාභ සහ Payback විශ්ලේෂණය
Payback in 3.3 years • 20-Year Net Profit: Rs. 5,510,560
You save Rs. 144,000 directly from personal income taxes through the Rs. 600,000 solar installation deduction at your 24% tax rate.
පාරිසරික බලපෑම (Environmental Impact)
ශ්රී ලංකාවේ වහල මත සූර්ය බලශක්ති පද්ධති පිළිබඳ සම්පූර්ණ මඟපෙන්වීම (Sri Lanka Rooftop Solar Guide)
Due to Sri Lanka’s geographical location close to the equator, the island enjoys consistent solar irradiance averaging 4.0 to 5.5 peak sun hours per day. A typical rooftop solar PV installation generates around 120 kilowatt-hours (units) per 1 kW system per month.
1. CEB Net Accounting (රු. 27.06)
Ideal for households and small businesses. Your solar generation offsets your monthly household consumption directly. Any surplus electricity exported to the CEB grid is paid at the fixed feed-in tariff of Rs. 27.06 per unit.
2. IRD 2025 Solar Tax Relief
Under Inland Revenue (Amendment) Act No. 02 of 2025, residential solar buyers can deduct up to Rs. 600,000 from taxable personal income. For taxpayers in higher brackets (e.g. 30%-36%), this reduces initial system cost by up to Rs. 216,000.
3. Hardware & CEB Approval
Always select BloombergNEF Tier 1 monocrystalline half-cut solar panels with a 25-year performance warranty, certified on-grid inverters (Huawei, Growatt, Solis), and ensure full Sri Lanka Sustainable Energy Authority (SLSEA) registered installation.