Compare heating, hot water, appliance and EV loads across building types and upgrade scenarios — with running costs.
2-bed flat — older systems
2 people, brick walk-up. Panel heaters + window AC + electric storage HW.
Building
Scenario
Show end uses
Annual cost breakdownTariff assumptions (Endeavour Energy zone, 2025-26)
Flat usage rate: 33 c/kWh (used for scenarios A and B)
Time-of-use: Peak 50 c/kWh (3-9pm), Shoulder 28 c/kWh, Off-peak 22 c/kWh (used for EV charging in optimised scenario)
Daily supply charge: $1.20/day ($438/year) — fixed regardless of usage
Feed-in tariff: 5 c/kWh (IPART benchmark range for 2025-26 is 4.8-7.3 c/kWh). Endeavour also offers a seasonal evening peak FiT of 12-16 c/kWh if you can shift exports into that window with a battery
Gas: 4 c/MJ (~14.4 c/kWh thermal). For scenario A house only, gas heating cost shown separately
Note: Scenarios are illustrative for typical Wollongong households. Real bills vary with occupancy, building envelope, and behaviour.