In 2005, a grant scheme for the purchase of small photovoltaic (PV) systems for domestic residences was introduced. Eligible applicants could apply for a once-only grant of 20% on the purchase price of a photovoltaic system with a minimum installed size of one kilowatt peak, and subject to a maximum grant of €1165. Applicants were also eligible to an additional grant of €582 for every additional installed kilowatt peak, subject to a total maximum input power of 3.7 kilowatt peak (3.7kWp). Fractions of a kilowatt peak installed additionally above the minimum of one kilowatt peak (1kWp) were treated pro rata. The systems purchased under these schemes had to be installed in a domestic residence and had to be connected to the national grid. This scheme was not very successful and was terminated and substituted with a revised scheme aimed at increasing uptake.