Savings are for illustrative purposes only. An interval data assessment is required to accurately evaluate the savings a solar system might yield for a property. This savings calculator is an annual average for South East Queensland, based on the CEC database of 5hrs at 80% efficiency. Solar system yield varies month to month. This calculator assumes 100% usage of the solar system's generation. Monthly Demand Charges are based on an average charge of $19.90/kVa, with 100% of peak demand occuring at midday. Some PPA agreements may not be market competitive. Your savings may be more or less depending on a number of factors including but not limited to premise's: electricity usage, variance of electricity consumption, location, roof tilt, roof orientation, shading, system life, seasonal effects, weather events and others.