Western Australia residential electrical tariffs

Here are all the residential tariffs you might be on from Synergy/Horizon. In each diagram, the vertical axis is time of day, from midnight to midnight.

Current residential tariffs

These are the residential tariffs you can buy new.


Home Plan (A1) 32 cents per kilowatt hour, all day every day. Home Plan (A1) 32 Prices in cents per kW.hour, including GST.
Midday Saver plan 23 cents per kilowatt hour overnight. 8 cents per kilowatt hour from 9am to 3pm. 53 cents per kilowatt hour from 3pm to 9pm. Midday Saver midnight 9am 3pm 9pm midnight midnight 9am 3pm 9pm midnight 23 8 53 23 Prices in cents per kW.hour, including GST.
Electric Vehicle Add On Like the Midday Saver plan, but with a cheaper 19 cents per kilowatt hour rate from 11pm to 6am. Electric Vehicle Add On midnight 6am 9am 3pm 9pm 11pm midnight midnight 6am 9am 3pm 9pm 11pm midnight 18 23 8 51 23 19 Prices in cents per kW.hour, including GST.
Distributed Energy Buyback Scheme 10 cents per kilowatt hour from 3pm to 9pm. 2 cents per kilowatt hour all other times. Distributed Energy Buyback Scheme midnight 3pm 9pm midnight midnight 3pm 9pm midnight 2 10 2 Prices in cents per kW.hour.

My analysis: get the Midday Saver only if your usage in the cheap band outweighs your usage in the expensive band.

If you have a battery, charge it, ideally from your PV, until 3pm. From 3pm to 9pm, avoid drawing power from the grid.

Legacy residential tariffs

You can't buy these new — the only way you can be on one is if you're already on that one.

In "smart" plans, the horizontal axis is day of week — weekends are cheaper.


Electric Vehicle Home Plan 32 cents per kilowatt hour from 4am to 11pm. 22 cents per kilowatt hour from 11pm to 4am. midnight 4am 11pm midnight midnight 4am 11pm midnight 22 32 22 Prices in cents per kW.hour, including GST.
Smart Home Plan Complex, with different prices at different times, ranging from 17 to 60 cents per kilowatt hour. Smart Home Plan S M T W T F S midnight 7am 3pm 9pm midnight midnight 7am 3pm 9pm midnight 17 31 60 17 Prices in cents per kW.hour, including GST.
SmartPower (SM1) Complex, with different prices at different times, ranging from 17 to 64 cents per kilowatt hour. SmartPower (SM1) (Summer: October to March) S M T W T F S midnight 7am 11am 5pm 9pm midnight midnight 7am 11am 5pm 9pm midnight 17 32 64 32 17 26 26 Prices in cents per kW.hour, including GST.
 
SmartPower (SM1) Complex, with different prices at different times, ranging from 17 to 64 cents per kilowatt hour. SmartPower (SM1) (Winter: April to September) S M T W T F S midnight 7am 11am 5pm 9pm midnight midnight 7am 11am 5pm 9pm midnight 17 64 32 64 17 26 26 Prices in cents per kW.hour, including GST.
Hot Water Plan (B1) 13 cents per kilowatt hour, all day every day. Hot Water Plan (B1) 13 Prices in cents per kW.hour, including GST.

Data taken from here.

This work is licensed under CC BY 4.0

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