Amber, pretty much anywhere in Australia, I believe there are equivalents in the US, EU as well.
It should be noted that's a household retailer that essentially provides passthrough wholesale pricing with a margin.
And that sort of plan is generally only recommended for those that have batteries as variable electricity can also get very expensive on Summer evenings (above $10/kWh).
Australia has deregulated retail electricity, with the distribution networks being a monopoly.
Most households either have a smart meter required or can get one if they want.
And each household probably has the choice of 50+ energy retailers.
Most offer some combination of
- Flat rate (though this is now restricted and sometimes grandfather in some areas)
- Time of Use (normally a peak, shoulder and off-peak)
Time of Use + demand (similar but with an added component based on highest monthly/quarterly use in a given time period, typically hour)
All would have a daily charge of around $1/day, and then typically a feed in tariff.
The various retailers 'compete' with slightly different rates, daily charges and FIT but for most consumers it's probably a + or - 10% on the total bill.
And then you've got a small number of retailers that offer truly variable plans like the one shown above.