“…The author classified feedback as direct feedback which is available on demand (displays, trigger devices, prepayment meters, cost plugs on appliances), indirect feedback where raw data is processed by the utility and sent to the customer (frequent bills) and inadvertent feedback (solar water heaters and photovoltaics). The direct and indirect classification was also mentioned in (Darby, 2006), , (Kerr, 2012), (McKerracher, 2013), (Zvingilaite, 2015), (Serrenho, 2015) and (Zangheri, 2019). (Abrahamse, 2005) discussed studies based on periodicity of the feedback: continuous, daily, weekly, monthly, feedback with comparison, and feedback with monetary rewards.…”