Most solar calculators run on guesses. This one runs on your real 30-minute Synergy interval data — capturing how your home actually uses power, including the days you're at work or away on holiday.
Sample figures for illustration. Your actual report uses your own uploaded usage data and current Synergy tariffs and rebate schedules.
Log into MyAccount and download your 30-minute interval data — free, covers up to two years. Need help? See the export guide.
Enter the panel kW, optional battery kWh, and your quoted prices. We use Perth-specific monthly solar yields — not a national average.
Payback years for solar and battery, whether each clears its warranty window, and which Synergy plan minimises your annual bill.
Generic calculators apply averaged daily profiles. We use every half-hourly reading from your meter, so the simulation captures the days you're at work, the holidays you take, and the evening peaks that actually drive your bill.
One full year of half-hourly data — every appliance cycle, every cloudy afternoon, every quiet weekend — fed straight into the simulation.
A1 Home Plan, Midday Saver, and EV Add-On — each billed against your simulated usage so you know which one to switch to.
The Federal CHBP tiered rebate and the WA Residential Battery Scheme are applied to the battery cost — so payback is your real out-of-pocket payback.
Your CSV is processed in memory and the report comes straight back. No accounts, no storage, no marketing list.
After modelling your solar (and battery) setup, we score all three current Synergy residential plans against your actual usage and report which one minimises your annual bill — there's no one-size-fits-all winner.
One rate, 24/7. Predictable and easy — no time-of-use windows to manage.
Three rate bands — very cheap midday, expensive 3–9pm peak, mid overnight.
Adds an ultra-cheap 11pm–6am band on top of Midday Saver. Requires a registered EV.
Which plan wins depends entirely on your usage shape. Run the report to find out.