ebbillcalc

Sikkim rooftop solar and net metering calculator

What would rooftop solar do to your Sikkim bill? Enter your use and system size to see the bill with net metering, the PM Surya Ghar subsidy and the payback.

  • Sikkim’s own net metering rules
  • PM Surya Ghar subsidy built in
  • Bill run through the current tariff

Enter your units to see the bill.

Bill calculatorCheck a billTariff changesTrack this monthAppliance costsInverter and batterySolar with battery

Sikkim net metering rules

  • A home with a sanctioned load of 10 kW or less can install up to 10 kW. Above 10 kW load, the cap is 40% of the load or 10 kW, whichever is higher (SSERC First Amendment 2024, reg. 5). Source
  • The cap also depends on supply: 10 kWp on LT single-phase and 20 kWp on LT three-phase (First Amendment 2024, Table 2). Source
  • Excess units in a billing period carry forward as a credit to the next bill within the settlement year, April to March (SSERC Solar PV Regulations 2021, regs 2(36), 12(5)). Source
  • At the end of the year, the licensee pays for banked units at 70% of the Average Power Purchase Cost approved for the year before commissioning, for the system's life. Credits then reset to zero (regs 12(6), 12(9)). Source
  • Solar units pay no banking, wheeling or transmission charge, cross-subsidy surcharge or additional surcharge. Monthly minimum charges and demand charges still apply (reg. 16). Source
  • Domestic consumers pay no application fee or security deposit, and need no connection agreement for net metering (Second Amendment 2025, reg. 11(7)-(8)). Source

Default generation of 100 units per kW a month: the Union Cabinet's PM Surya Ghar note says a 3 kW system 'will be able to generate more than 300 units a month on an average'. Source

PM Surya Ghar central subsidy: ₹30,000 a kW for the first 2 kW and ₹18,000 for the third kW, no more above 3 kW (₹78,000 at most). Grid-connected homes only, domestic-made modules, once per home. MNRE benchmark cost ₹50,000 a kW up to 2 kW and ₹45,000 a kW above. Scheme runs to 31 March 2027. MNRE guidelines

Sikkim is a special category State: the subsidy is ₹33,000 a kW for the first 2 kW and ₹19,800 for the third kW (₹85,800 at most). The calculator uses these rates. See the PM Surya Ghar subsidy calculator.

Rooftop solar questions

How does net metering work?

A two-way meter records what you draw from the grid and what your panels send to it. On each bill the units you exported are taken off the units you imported, and you pay for the net units at the normal tariff. What happens to extra units depends on the state: some buy them every month, others carry them forward and settle at the end of the year.

How much does a 1 kW rooftop system generate?

The Union Cabinet’s note on PM Surya Ghar says a 3 kW system makes over 300 units a month on average, about 100 units per kW. MNRE says 1 kW can make 4 to 5.5 units on a clear sunny day. Your roof’s direction, shade and dust change this, so you can edit the figure.

How much is the PM Surya Ghar subsidy?

For homes: ₹30,000 a kW for the first 2 kW and ₹18,000 for the third kW, so ₹78,000 for 3 kW or more. Higher amounts apply in special-category states. The system must be grid-connected and use domestically made modules, and a home can get it only once. The scheme runs until 31 March 2027.

Do I still pay a fixed charge with solar?

Yes. In every state covered here, fixed charges and government levies stay payable whatever your solar credits.