Net Metering Schemes

Solar Power Schemes

Net-Metering, Net-Accounting & Net-Plus

In order to promote solar power, the government of Sri Lanka has provided three schemes for grid-connected solar power systems.

Grid-Connected Solar

  • Solar PV panels produce power when sunshine is present.
  • The inverter converts power produced by the panels to AC electricity.
  • The consumer will use the energy produced by the system, and any excess energy will be exported to the grid. The energy exported will be metered (by the export meter). If the consumer uses more electricity than what is generated (such as in the night), this usage will be measured using CEB’s normal electricity meter (the import meter).
  • The consumer’s electricity supply will continue as normal, and will be provided by either the Solar PV system, or via the CEB. The consumer will not notice any change in the electricity supply they receive.
  • At the end of each month, the CEB will charge the customer based on the solar power scheme chosen by the customer.

Net-Metering

Reduce, or eliminate your electricity bill with solar power

Net-Accounting

Eliminate your electricity bill and Earn money from selling solar energy

Net-Plus

Earn money from your Solar energy. Pay your electicity bill seperately

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The Net-Metering solar scheme

Net-metering is scheme that allows consumers to install renewable energy facilities, such as solar power. A consumer with net-metering will be provided credits for energy supplied to the CEB from the solar power system. These credits will be deducted from the consumers monthly electricity bill, hence the term net-metering.

How net-metering works – include the net-metering video

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How does Net-Metering work?

  1. Solar PV panels produce power when sunshine is present.
  2. The power produced by the panels will be converted to AC electricity, to match the CEB electricity supply.
  3. The consumer will use the energy produced by the system, and any excess energy will be exported to the CEB. The energy exported will be metered (by the export meter).

If the consumer uses more electricity than what is generated (such as in the night), this usage will be measured using CEB’s normal electricity meter (the import meter).

  1. The consumer’s electricity supply will continue as normal, and will be provided by either the Solar PV system, or via the CEB. The consumer will not notice any change in the electricity supply they receive.
  2. At the end of each month, the CEB will only charge the customer for any excess electricity used. The electricity exported will be deducted from the electricity used, prior to billing.
  3. If the customer produced the same number of units as they used, then the electricity bill will be zero. If more electricity was produced than used, a credit will be carried forward to next month’s bill as per the Net-Metering Scheme or will be paid as per the Net-Accounting Scheme.

 

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How to get the energy details of your Solar Power System

How to take the Import and Export meter readings

  • Below codes of the digital meter shows the imported and exported total energy from your home.
  • 8.0 – Active Import Total Energy
  • 8.0 – Active Export Total Energy

       

How to get the Net Energy usage

  • Monthly Imported or Exported Total Energy Usage equals to the difference of meter reading on beginning and ending of the month period.
  • Your monthly net energy usage is equal to the difference between Import Total Energy and Export Total Energy. So billing is doing for that units (kWh) difference.

How to get the Energy Generation details from the Solar Power System

  • Total Energy Generation – Press the Function button of the inverter repeatedly, until you reach the E-Total interface on LCD screen and get that reading. It shows the Total Energy generated by the System.
  • Energy Generation of today – Press the Function button of the inverter repeatedly, until you reach the E-Today interface on LCD screen and get that reading. It shows the Total Energy generated in today by the System.

How to get the Actual Energy Usage (kWh) of your Home

  • The Actual Energy Usage is not equal to the Imported Total Energy, sometimes the generated energy by the solar power system also used by home. So that used energy cannot monitor from the energy meter.
  • Below formula can use to calculate the actual energy usage of tour home.

Actual Energy Usage= Imported Total Energy + (Total Generated Energy – Exported Total Energy)

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Frequenty Asked Questions

  1. What is the lifetime of a solar power system?

A solar power system consists of a several components. The main component, the Solar panels have a lifetime exceeding 25 years. Our solar panels have a performance guarantee for up to 25 years.

The inverter of the solar system comes with a warranty of 5 years. It is possible to purchase an extended warranty for the inverter if required. Inverters from SMA are designed for a lifespan of 20+ years, and inverters from Zeversolar are designed for a lifespan of 10-12 years. The inverter can be replaced with a newer model if required.

  1. What happens in the event of a power outage?

The solar power system will automatically power down during a power outage. This is a necessary precaution required by the utility company. Power cannot be obtained from the system during power outages.

  1. What happens during cloudy or rainy periods?

Credits for electricity generated from periods of strong sunlight will be retained by the CEB, and can be used during the rainy periods. The system’s reduced output during cloudy or raining periods will be compensated by the power generated during periods of strong sunlight.

 

How long does it take to install a home solar power system?

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SolSpectrum is a member of the Sherman Sons Trading group of companies.

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