primarily due to the occupants running multiple laundry loads after returning from a holiday trip. With Ontario's TOU plan, if the home had consumed 100% of the day's power during the 10.8¢/kWh on-peak period, and all consumption was shifted to the 6.2¢/kWh off-peak period, then the maximum savings is 43%, or $2.01 (from $4.72 to $2.71) for the day. Since the home did not consume 100% of its power during the on-peak period, the maximum realizable savings (if we shift all of the on-peak and mid-peak consumption to the off-peak period) is only 30%, a decrease of $1.14 for the day (from $3.85 to $2.71). In practice, battery and inverter inefficiencies, which combined are Formula efficient, reduce the savings further, to $0.99 for the day. Finally, if we then add in the 10.5kW generated by renewables the savings increases by $0.93 to $1.92. This per-day savings rate translates to a yearly savings of $702, if the system achieves it every day