California Code, Public Resources Code - PRC § 25413

(a) Applications for eligible energy projects or measures may be approved by the commission only in those instances where the eligible institution has furnished information satisfactory to the commission that the costs of the project, plus interest on state funds loaned, calculated in accordance with Section 25415, will be recovered through savings in the cost of energy to the institution during the repayment period of the allocation.

(b) An eligible institution may propose to bundle multiple projects where the determination of whether the costs of the projects, plus interest on state funds loaned, will be recovered through savings during the repayment period of the allocation and shall be determined by the savings of those multiple projects bundled together.

(c) The savings shall be calculated in a manner prescribed by the commission.