You should check with your electricity retailer about any tariff changes that will occur as a result of installing solar and carefully weigh up the advantages and disadvantages before making a decision. This should be considered before your install your solar PV panels. Some ways the electricity rates can affect you are given below:
• You may move from an off-peak tariff to a time-of-use (TOU) tariff. A TOU tariff is a pricing structure that changes depending on the time of day you consume power. In peak demand periods (day), charges will be higher than consumption during lower demand periods (night). So while electricity is most expensive during the day, this will be offset by your solar PV system producing energy during this time also.
• If you move from an off-peak tariff to a time-of-use (TOU) tariff, this will particularly affect your dedicated off-peak loads, such as hot water, space heating and air- conditioning.