A power purchase agreement (AAE) provides payment flow for a build-own transfer (BOT) or a concession project for an independent power plant (PPI). It is between the „buyer“ buyer (often a state electricity supplier) and a private electricity producer. The AAE described here is not suitable for electricity sold on world markets (see deregulated electricity markets below). This summary focuses on a basic thermal charge facility (the problems would be slightly different for thermal or hydroelectric power plants in the central area or in the state-of-the-art facilities). With solar financing options, businesses can avoid the costs of purchasing and installing ahead of the company while continuing to enjoy the benefits of clean energy, knowing that they support a sustainable future. As field electricity becomes the new standard, CPPAs are likely to remain the preferred choice to enable businesses to meet their decarbonization goals while ensuring stable power supply and low energy costs. Over the past year, it has also been shown that Electricity Purchase Contracts (AAEs) offer some of the best models for the use of solar production for private purposes. A POWER Purchase Agreement is a legal contract between an electricity producer (supplier) and an electricity buyer (buyer, usually an electricity supplier or a large electricity buyer/distributor). Contractual terms can take between 5 and 20 years during which the buyer buys energy and sometimes also capacity and/or ancillary services from the electricity producer. These agreements play a key role in financing assets of own property producing electricity (i.e. not held by a utility company). The seller under the AAE is usually an independent electricity producer or a „PPI.“ The AAE is considered binding at the time of signing, also known as the reference date.
Once the project is built, the validity date ensures that the buyer buys the electricity produced and that the supplier does not sell its production to others other than the buyer.  A core PPP between the Bonneville Power Administration and a wind power generation unit has been developed as a benchmark for future AAEs.  Solar PPAs is now being successfully used in the California Solar Initiative`s Multifamily Affordable Solar Housing (MASH) program.  This aspect of the success of the CSI program has only recently been opened up to applications.