One of the main advantages of the ECA is that by clearly defining the performance of the generating assets (e.g. B a solar electricity installation) and credit to associated revenue streams, a AAA can be used by the ECA provider to obtain recourse financing from a bank or other counterparty that finances.  Power Purchase Agreement (ECA) for temporary, mobile or short-term backup power, temporary or backup power purchase agreement for the purchase of electricity from a mobile facility (on skates). Prepared by an international law firm for a small rural energy project in Africa, as well as an implementation agreement. .