Power Purchase Agreement

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A Power Purchase Agreement (PPA) is a legal contract between an electricity generator and a purchaser of energy or capacity (power or ancillary services). Such agreements play a key role in the financing of electricity generating assets. By clearly defining the output of a generating asset and its associated revenue streams, a PPA can be used by the owner of the asset to raise non-recourse financing[1]from a bank or other financing counterparty.[2][3]

Power purchase agreements are a popular financial vehicle to make renewable energy more accessible to residential and commercial properties. In 2006 10% of non-residential photovoltaic installations in the United States used a PPA, 50% in 2007, and expected to exceed 90% by 2009.[4][5]

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