For the limited purposes of Article 2 (commencing with Section 1770) of this chapter, “public work” also means any construction, alteration, demolition, installation, or repair work done under private contract when the following conditions exist:

1. (a) The work is performed in connection with the construction or maintenance of renewable energy generating capacity or energy efficiency improvements.
2. (b) The work is performed on the property of the state or a political subdivision of the state.

3. (c) Either of the following conditions exists:

   1. (1) More than 50 percent of the energy generated is purchased or will be purchased by the state or a political subdivision of the state.
   2. (2) The energy efficiency improvements are primarily intended to reduce energy costs that would otherwise be incurred by the state or a political subdivision of the state.