Allows a two-way flow of electricity between the electricity distribution grid and customers with their own generation. Customers pay only for the net electricity used. Net metering has been introduced in 13 countries.  A detailed list of countries can be found here.

Success Story

Thailand initiated the first net metering policy in the developing world in 2002.  The Very Small Power Producer (VSPP) regulations were aimed at encouraging the use of small scale renewables generation (under 1 MW).  In conjunction with the nation’s power utility corporations the Thai government mandates the purchase any surplus electricity generated at rates which are adjusted every three months.  The VSPP program covers production from a variety of sources including solar PV and bioenergy.  The initial legislation was extended in 2006 and now includes mandates on the purchase of electricity derived from production of up to 10 MW.

Source: UNDP

Further Reading

American Wind Energy Association (AWEA)