Our services


Electricity tariffs are complicated.
As more renewables are added to the grid, more complex tariffs are emerging, making it harder for everyday Australians to choose the best plan. With Auto-switcher, Rexergy takes care of this task. We constantly search for the best plan, and if we find one that's better for you than the one you are on, we will switch you to it automatically (we will always double-check with you).
We use your smart meter data to predict how you are going to use energy in the future, and then calculate the cost of every available plan, in order to find the best one for you.

Optimal Control

Autopilot for you Air-conditioner.
By adding intelligence to your large thermal loads, such as air-conditioning, hot water heating, and refrigeration, we can optimally choose when those devices should run. This allows you to avoid using electricity during the most expensive periods of the day, without impact your comfort or commercial needs.
Kind of like a thermal battery, but one that you've already paid for.
When combined with our Tariff Auto-switcher, even greater savings are possible.

Frequently asked questions

It depends on your load, and your existing tariffs. 

The average household, who spends $1600 a year on energy, should be able to save around $200 by switching to the best tariff, which is around a 10-15% saving. 

For small businesses, the relative savings will be about the same, around 10-15%.

The days of working out the best tariff using an spreadsheet are now over. The number of providers has skyrocketed, and the complexity of tariffs have increased. You now have to consider demand charges, time-of-use rates, and controlled loads. Some tariffs even have high solar feed-in tariffs, to try and attract solar customers, but then also bump up the usage price. Working out if that’s a good deal overall is a hard task.

This is why we need your smart meter data to choose the best plan with any confidence. Without it, it’s really just a educated guess.

Auto-switcher works for both households, or businesses.

We charge a flat subscription to provide access to Auto-switcher.

If you save less than our forecast, then our savings guarantee comes into effect, and you don’t pay anything for that switch.

Yes you need to have a smart meter to use this service.

If you don’t have a smart meter, you will not have the high-resolution historical data that we require. You can have your energy retailer install a smart meter, but you will need to wait some time to collect data.

If you urgently need to reduce your energy bill, contact us and we will see what we can do.

Many retailers have an online portal where you can download your ‘interval data’. In other cases, you will need to fill out a data request form for us, and we can request it. In any case, we will guide you through the process.

Auto-switcher takes into account the cost of switching retail plans. 

We will not share your data with other third parties, and will not use for purposes other than saving you money on your energy bill.

Our algorithms use your smart meter data to predict how much you will save by switching energy plans. If we switch you to a new plan, and you don’t save within the range that we expected, then you will not have to pay for the subscription for that time period.

The saving guarantee only works while your behaviour is similar, and while market conditions are similar. Please let us know if you make any significant changes to the way you use energy, so we can update our prediction. This includes any new energy-hungry devices, new family members, building extensions etc.

The Founding Team

Rexergy was founded to accelerate the transition to 100% renewables and beyond, by optimising each part of the energy system to be as efficient as possible.

Ben Wilkinson

Grew up on a boat, sailing around Queensland, where he got his passion for renewable energy. Studied physics in order to work on fusion, but soon switched to researching solar cell design. During this research he came to the conclusion that it was crazy to spend all this effort for one more percent efficiency, while ignoring the fact that solar would eventually push the midday price of electricity close to zero. Something had to change.

Helia Homayouni

Raised in Tehran, She studied chemical engineering, before moving to Australia, and completing her MBA in Canberra, and becoming an entrepreneur. 

Was a key factor in turning a fledgling InnovationACT team into a growing startup.

Advaith Sivakomar

Mechatronics engineer passionate about solving everyday problems innovatively, and keen to push the transition to renewable energy.