What is the average scale of investment in cost-effective energy efficiency upgrades through a tariffed, on-bill program?

The average scale of investment in cost-effective energy efficiency upgrades at a site depends on the type of site, weather zone, the energy use equipment in the building, the utility’s cost of capital, and the useful life of the upgrades being undertaken.

For residential energy efficiency upgrades undertaken through on-bill programs in Kansas, Kentucky, and Arkansas, the average cost of all cost-effective energy efficiency upgrades at a site are in the range of $6,000-8,000.