Archive of the Prior Incentive Eligible Photovoltaic Modules Expired July 1, 2009. (Adobe PDF, 64 pages, 384 kilobytes)

* BIPV = Building Integrated Photovoltaics

** In the New Solar Homes Partnership (NSHP), the incentive is based on expected kWh generation with a time dependent weighting, via the CECPV Calculator. The CECPV Calculator shall be used to determine the incentive under NSHP as the PTC rating is not used in the NSHP incentive calculation.
PTC refers to PVUSA Test Conditions, which were developed to test and compare PV systems as part of the PVUSA (Photovoltaics for Utility Scale Applications) project. PTC are 1,000 Watts per square meter solar irradiance, 20 degrees C air temperature, and wind speed of 1 meter per second at 10 meters above ground level. PV manufacturers use Standard Test Conditions, or STC, to rate their PV products. STC are 1,000 Watts per square meter solar irradiance, 25 degrees C cell temperature, air mass equal to 1.5, and ASTM G173-03 standard spectrum. The PTC rating, which is lower than the STC rating, is generally recognized as a more realistic measure of PV output because the test conditions better reflect «real-world» solar and climatic conditions, compared to the STC rating. All ratings in the list are DC (direct current) watts.
Neither PTC nor STC account for all «real-world» losses. Actual solar systems will produce lower outputs due to soiling, shading, module mismatch, wire losses, inverter and transformer losses, shortfalls in actual nameplate ratings, panel degradation over time, and high-temperature losses for arrays mounted close to or integrated within a roofline. These loss factors can vary by season, geographic location, mounting technique, azimuth, and array tilt. Examples of estimated losses from varying factors can be found at:

*** Equipment is in the process of being removed from the list of eligible equipment pursuant to Appendix A, Section B, of the Guidelines for California’s Solar Electric Incentive Programs (Senate Bill 1), Fifth Edition