First introduced in 1992, the PTC allows eligible wind generators to take an inflation - adjusted tax credit per unit of generation (2.3 cents per kilowatthour in 2014) for the first ten years of operation. (eia.gov)
As shown below, estimated monthly generation rates for small - scale solar PV installations, measured as kilowatthours of generation per kilowatt (kWh / kW) of capacity, are almost identical to generation rates reported to EIA by TPOs. (eia.gov)
Inclusion of distributed solar PV generation, which EIA estimates at roughly 10 billion kilowatthours in 2013, modestly accelerates the timing of the crossover between hydro and nonhydro renewable generation (see AEO2014). (eia.gov)