Cheapest electricity plan in South Australia
As of 8 November 2026, the cheapest published electricity plan in South Australia for a household using 4,000 kWh a year is iO Energy's Sustainable Home (Electrify) at an estimated $129 a month (peak 77.27c/kWh 5pm to 8.59pm every day, shoulder 33.64c/kWh 6am to 8.59am every day, off-peak 7.27c/kWh 10am to 3.59pm every day plus 150.00c a day with solar feed-in 0.00c/kWh and 1 conditional discount not counted), on the SA Power Networks network.
South Australia has one distribution network, SA Power Networks. 241 published plans were priced across the state. Figures are OpenStream's estimates from the supply and usage rates each retailer publishes to the Australian Energy Regulator, at the stated annual usage, GST as published and conditional discounts excluded; they are not retailer quotes. Demand-priced, variable-priced and solar-only plans are left out because they have no single honest figure.
Cheapest first
Estimated monthly cost at the stated usage. Every plan links its page; the button hands off to the retailer.
- 1iO Energy Sustainable Home (Electrify)SA Power Networks network$129/moGo to iO Energy
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How to read this
Every figure is OpenStream's estimate, not a retailer quote: the supply and usage rates each retailer publishes to the Australian Energy Regulator (via Energy Made Easy), applied to the stated annual usage, GST as published, conditional discounts excluded. Prices vary by distribution network, not postcode, so the network page is the record; it links every plan to its regulator entry and keeps a nightly history. Demand-priced, variable-priced and solar-only plans are left out because they have no single honest figure. Errors are possible - check the cited sources. Full method: methodology. Machine-readable: this answer as JSON, MCP, llms.txt.
Related: Cheapest on the SA Power Networks network · Every plan on SA Power Networks · Cheapest small business electricity plan in South Australia · Compare every plan for your postcode · All answers
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