Finding the cheapest electricity in South Australia
SA Power Networks supplies every home on the grid in South Australia, which makes comparison simpler than in states with several networks. The same plans and prices apply from Adelaide to Mount Gambier.
South Australia has some of the highest electricity prices in the national market, so the gap between the cheapest plan and the Default Market Offer is worth hundreds of dollars a year. It also has one of the highest shares of homes with rooftop solar, so check feed-in tariffs if you export.
Cheapest electricity in the SA Power Networks network
South Australia. Default Market Offer: $2,334 a year at 4,000 kWh.
| # | Retailer and plan | A year | vs reference |
|---|---|---|---|
| 1 | 1st Energy1st Emerald - Single Rate | $1,887 | 19% below |
| 2 | GloBird EnergyFULLHOUSE Residential (Flat Rate)-SAPN * | $1,905 | 18% below |
| 3 | Kogan EnergyKogan Energy with free FIRST | $1,951 | 16% below |
| 4 | PowershopPower House | $1,951 | 16% below |
| 5 | Flipped EnergyAnytime Switched On 2.2! * | $1,984 | 15% below |
| 6 | SumoSumo Stobie * | $1,997 | 14% below |
| 7 | Lumo EnergyLumo Basic | $2,016 | 14% below |
| 8 | ENGIESA ENGIE - Perks Elec | $2,054 | 12% below |
| 9 | Momentum EnergyHome Comfort Electricity | $2,098 | 10% below |
| 10 | Red EnergyLiving Energy Saver | $2,109 | 10% below |
At 2,500 kWh a year the cheapest are Kogan Energy ($1,351), Powershop ($1,351), GloBird Energy ($1,364). At 6,500 kWh a year they are 1st Energy ($2,734), GloBird Energy ($2,807), Sumo ($2,888).
How to get the best price
Find your network
It is on your bill as the distributor. Prices differ a lot between networks.
Use a year of your own usage
Add up the kWh on four quarterly bills, or download your smart meter data.
Check the full plan
Look at the supply charge, usage rate, feed-in tariff and any conditions on the fact sheet.
Compare on the government site
Energy Made Easy lists every generally available plan and prices it on your usage.
Ask your current retailer first
Your bill's better offer message may already point to a cheaper plan.
Wholesale-linked retailers such as Amber Electric and Flow Power are not ranked because their prices follow the wholesale market, so their published rates are only estimates.
How these prices were worked out
Every price on this page comes from the plans retailers publish to the AER's Energy Made Easy data under the Consumer Data Right, as at 14 October 2026. We price flat-rate (single rate) plans that any household in the area can sign up for, at 2,500, 4,000, 6,500 kWh a year, including GST, the daily supply charge and guaranteed discounts. Conditional discounts, such as for paying on time, are left out. Plans limited to members, existing customers or homes with particular equipment are excluded. Retailers with wholesale-linked prices are listed separately, not ranked.
Prices change, sometimes weekly. Always confirm the current price on the retailer's plan fact sheet or a government comparison site before you switch. Our switching guide covers the steps.
Common questions
It depends on your network and usage. At 4,000 kWh a year, the cheapest generally available flat-rate plans as at 14 October 2026 were 1st Energy in the SA Power Networks area ($1,887).
The cheapest plans we found were 19% below in SA Power Networks, at 4,000 kWh a year including GST.
They come from the same published plan data. Energy Made Easy prices plans on your own usage and can include conditional discounts, so your results may differ slightly.
Sources
Every rate on this page comes from the regulator or the regulated retailer. Last checked 14 October 2026. Prices include GST unless we say otherwise.