📋 In this guide:

• Electricity providers Adelaide: discounts often hide higher base rates
• Supply charges can outweigh a cheaper usage rate
• Time-of-use plans reward midday and punish evening usage
• DMO reference bill for SA is $2,334
• Tesseract ZERO offers a third way to buy energy

Searching for electricity providers Adelaide usually ends the same way: a comparison site, a dozen plans, and a headline discount that looks great until your first bill arrives. After this year’s 1.4% rise in South Australia’s reference price, plenty of households are shopping around again.

Switching can save you money. But the plan that looks cheapest in an ad isn’t always the cheapest for your home. What actually decides your bill is how a plan’s rates line up with the way you use power.

This guide covers what to compare, the traps to avoid, and a question most comparison sites never ask: do you want to keep buying all of your energy the same way?

Start With the Benchmark: The Default Market Offer

Every plan in South Australia is advertised against the Default Market Offer (DMO), a reference price set each year by the Australian Energy Regulator. For 2026–27, the reference bill for a typical SA household is $2,334 a year.

When a retailer says “15% off”, it usually means 15% below that reference bill for typical usage. It’s a useful yardstick, but your usage isn’t typical. It’s yours. Treat the DMO comparison as a starting point, not an answer.

Five Things to Compare on Every Plan

1. The usage rate (cents per kWh). This is what you pay for each unit of electricity. On a time-of-use plan, you’ll see separate peak, shoulder and off-peak rates.

2. The daily supply charge. A fixed amount you pay every day just to be connected, whether you use power or not. A plan with a low usage rate and a high supply charge can cost more than it looks, especially for smaller households.

3. Conditional discounts. Pay-on-time and direct-debit discounts only count if you meet the condition every time. Compare plans on the price you’ll actually pay.

4. Time-of-use windows. When does peak start and end? In South Australia, SA Power Networks charges less for network use between 10am and 3pm to soak up midday solar, and peak grid rates can reach up to 56¢ per kWh. If your family uses most of its power in the evening, a plan’s peak rate matters more than anything else on the page.

5. Contract terms and exit fees. Is the rate fixed or variable? How much notice do you get before prices change? Can you leave without a fee?

Check Your Own Usage First

Picture a household in Glenelg comparing two plans. Plan A has the lowest peak rate. Plan B has a bigger advertised discount and a cheaper midday rate. On paper, Plan B wins. But this family is out all day and does almost everything between 5pm and 10pm. Plan A ends up cheaper by a clear margin.

How do you avoid that trap? Download your usage data from your retailer’s app or portal before you compare. Look for three numbers: total daily usage, how much of it falls in the evening peak, and your daily supply charge. The government’s Energy Made Easy website lets you upload a bill and compare plans against your actual usage.

New This Year: Solar Sharer Plans

Since 1 July 2026, retailers in South Australia must offer at least one Solar Sharer plan with free electricity from 12pm to 3pm, up to 24 kWh a day, according to SolarQuotes’ summary of the rules. It can be a good deal if you can shift washing, pool pumping or battery charging into that window. Check the peak rates and supply charge on the same plan, since that’s where retailers can recover the cost.

The Question Comparison Sites Don’t Ask

Here’s the limitation of switching providers. You can change retailers. You can compare plans. You can negotiate another discount. But you’re still buying your energy through essentially the same system, with the same network costs and the same exposure to price rises. According to ABS data, electricity prices have risen about four times over in 20 years, roughly 7.5% a year.

That’s why generating energy at home is worth a look too. Our guide to solar vs grid electricity walks through that choice.

How Is Tesseract ZERO Different?

We’re not trying to be another electricity retailer, and we’re not trying to be another solar company. Tesseract was founded in South Australia in 2018, and Tesseract ZERO is our answer to a simple question: what if you didn’t have to choose between expensive grid power and buying your own system?

We install solar and battery technology at your home, own it and manage it. You pay a fixed 28¢ per kWh for the clean energy your home uses, fixed for the 10-year agreement term, with $0 upfront. You stay connected to the grid when you need it. For eligible households, typical customers may save up to 30% on their energy costs.

Based on the savings of a typical customer. Eligibility criteria apply. Savings vary based on household energy usage and location.

See how we compare with a traditional retailer on our Tesseract ZERO vs electricity retailers page.

FAQ

How do I compare electricity providers in Adelaide?

Compare the usage rates, daily supply charge, time-of-use windows and contract terms against your own usage data, not just the advertised discount. Energy Made Easy lets you compare plans using your actual bill.

What is the reference electricity price in South Australia for 2026–27?

The AER’s Default Market Offer reference bill for a typical SA household is $2,334 a year for 2026–27, up 1.4% from the previous year.

How is Tesseract ZERO different from a traditional retailer?

We’re not building another traditional electricity retailer. With Tesseract ZERO, we install and own solar and battery technology at your home, and you pay a fixed rate for the clean energy your home uses. You remain connected to the grid.

Conclusion

The best of the electricity providers Adelaide has to offer is the one whose rates match how your home uses power. Pull your usage data, compare supply charges and peak rates, and read past the discount. And if you’re tired of buying all of your energy the same way, it’s worth looking at the options beyond the grid.

Want to see what your bill says? Send us one power bill. No cost, no obligation — and if it isn’t a good fit, we’ll tell you. Contact us here.