Your Home Generates Solar All Day.Your Gas Boiler Ignores Every Bit of It.
Thermal Dawn connects the two, storing your daytime solar as heat and delivering it through your existing radiators and underfloor heating, all evening, for free.
Works with your existing radiators and underfloor heating. Australian-made. No gas, no peak-rate pain.
Two Victorian homes are now live.
A Standard Heat Pump Still Leaves You Exposed
Swapping a gas boiler for a standard hydronic heat pump is a step forward. But it doesn't solve the fundamental problem: your home needs heat most at dawn and dusk, exactly when electricity prices peak.
A standard heat pump draws from the grid during those expensive morning and evening hours. You've escaped gas, but you're still paying premium rates every time the temperature drops at night.
Thermal Dawn is different. Our system charges during the day on your solar, storing thermal energy while the sun shines and rates are low, then delivers that stored warmth through your radiators and underfloor heating all evening, without touching the grid.
What This Actually Means for Your Bills
Up to $5,000/yrAnnual savings vs. gas hydronic + grid electricity
3–5 yearsTypical payback period with existing solar
15+ yearsSystem lifespan, no degradation, no replacement cycle
Gas prices have risen over 40% in five years and aren't coming back down. Every year you stay on gas is another year paying for an energy source with nowhere to go but up. A Thermal Dawn system locks in your heating costs at near-zero marginal rate, your morning solar, for years to come.
Savings estimates based on modelling of a typical 3–4 bedroom home with existing rooftop solar replacing a gas hydronic system, actual savings depend on your home size, climate zone, solar capacity, and tariff structure.
Why Not Just a Battery?
It's the first question almost everyone asks. The short answer: we're not anti-battery, we're pro-economics. For the loads that dominate your bill, heating, cooling, and hot water, storing energy as heat is far cheaper than storing it as electricity.
| Home battery (lithium) | Thermal Dawn | |
|---|---|---|
| Stores | Electricity | Heat & cooling, directly |
| Cost to store your thermal load | High, you pay for premium battery capacity | A fraction of the cost |
| Conversion losses | Electricity → heat, lossy at every step | Solar → heat, stored as heat |
| Degradation | Fades within ~10 years | No charge-cycle limit, lasts decades |
| Fire risk | Yes | None |
| Made in | Mostly imported | Australia |
A battery is a fine way to run your lights and power points. But heating and hot water are where the big, predictable load sits, and that's exactly what thermal storage does best, for less. Some homes end up with both; if you're choosing one first, this is the one that pays back your heating bill.
Works with Your Solar.Works Without It Too.
Thermal storage is often explained as a way to use your own solar, and it is. But the thing it really does is buy energy when it's cheap and spend it when it's expensive. Your roof is one source of cheap energy. It isn't the only one.
No solar at all
The store charges on off-peak rates overnight or in the middle of the day, then heats your home through the expensive evening peak. You're still buying your heat at the cheapest rate on your tariff instead of the dearest.
Free midday windows
Retailers are now handing out free power windows, typically around 11am to 2pm, to soak up the midday solar glut. That is exactly the window a thermal store is built to charge in, and it's free fuel whether or not you own a panel.
A small or ageing array
Plenty of homes have 2 or 3kW that barely covers the base load in winter. The store takes whatever your roof gives it and tops up from the cheapest rate available for the rest. Nothing is wasted and nothing is required.
Solar coming later
Install now, add panels whenever you're ready. The system picks up the extra generation automatically, so the order you do things in doesn't cost you anything.
If you've been told thermal storage only makes sense with a big array, that's worth a second opinion. We'll model your actual tariff at the assessment and show you exactly where the savings come from in your case.
Same Pipes. Smarter Heat Source.
The same thermal storage that powers your heating can also deliver hot water and summer cooling, maximising your use of dawn solar and cutting even more off your energy bills.
Charge on solar
During the day, your solar panels power the Thermal Dawn heat pump, storing heat in our Australian-made thermal tank. No waste, no export at near-zero rates.
Heat your home for free at night
When the sun sets and your family comes home, stored thermal energy circulates through your existing radiators and underfloor heating, keeping every room at the right temperature without drawing from the grid.
The system learns your home
Our AI optimises charging times based on your solar forecast, local weather, and your tariff schedule, so you're always comfortable and always on the cheapest possible energy.
Keep Everything You Love.Replace Everything That Costs You.
What Stays
- Your radiators
- Your underfloor heating pipes
- Your zoned controls
- Your comfort
What Goes
- Your gas boiler
- Your gas connection
- Your gas bills
- Peak-rate electricity costs
For most homes, the retrofit is straightforward, Thermal Dawn connects to your existing hydronic pipework in place of your gas boiler. No new radiators, no major plumbing, no mess. A free site assessment confirms compatibility and gives you a fixed quote with no surprises.
Worried your radiators won't work with a heat pump? That's the most common concern we hear, and the answer is usually yes, they will. Here's the flow-temperature question, answered →
Most Hydronic Homes Are a
Straightforward Retrofit
If you have an existing gas hydronic system with radiators, underfloor heating, or fan coils, you're already most of the way there. The main questions our site assessment answers:
Is your existing pipework in good condition?
What's your heating load, and what is the right capacity?
Where does the thermal storage tank go, inside or outside?
Does your switchboard need an upgrade?
We flag everything upfront. No surprises on install day.
What about summer? The same system runs in reverse to cool your home, through underfloor circuits or fan coil units. (Radiators can't cool; we map this out at assessment.) How hydronic cooling works →
Proof, not promises
It's not a concept. Our first home is live in Hawthorn, Melbourne: gas boiler gone, gas meter off the house, heating now running on stored solar. Running totals from the customer's own app: $1,190 saved, 24,199 MJ of gas avoided. And the second install is already in.
"We've been looking for 5 years for a hydronic heat pump, but we didn't want to pay $25,000. We finally did it."
Mike & Kay, Hawthorn
Ready to Get Off Gas?
Request a quote, it's free and carries no obligation. We'll confirm your home is a good fit, answer every question, and give you a fixed installed price.
Risk reversal: Fully refundable reservation. No obligation until installation. Australian-made, Australian-installed.
Frequently asked questions
How is thermal storage different from a battery?
Lithium batteries store electricity, then convert it back to heat when you need it, losing efficiency at every step. Thermal Dawn stores heat and cold directly, so your dawn solar becomes evening comfort without the conversion losses, degradation, or fire risk. It's infrastructure that lasts decades, not a battery that fades in 10 years. (See "Why not just a battery?" above for the full comparison.)
How much does it cost?
Our target is around half the cost of a comparable lithium battery system for heating, cooling, and hot water, with no degradation and no replacement costs in 10 years. Total installed cost depends on your home size, existing pipework, and electrical setup. Book a free, no-obligation site assessment for a fixed quote.
How much will I save?
Based on modelling in real Australian homes, customers can save up to $5,000/yr by shifting thermal loads away from peak grid prices. Your savings depend on your climate zone, home size, energy tariffs, and solar generation. We'll run a personalised estimate during your site assessment, most systems pay for themselves in 3–5 years.
Do I need solar panels already?
No. See "Works with your solar, works without it too" above: cheap off-peak and free midday windows charge the store just as well. Adding solar later? The system picks it up automatically.
I already have a battery. Does this still help?
Yes, and the two aren't competing. A battery is expensive storage doing a general-purpose job; thermal storage is cheap storage doing one job very well. Heating, cooling and hot water are the largest, most predictable loads in the house, and covering them thermally is far cheaper per kWh than covering them from lithium.
The practical effect is that your battery stops being the thing that carries your heating. It's freed up for lights, appliances, the EV and overnight backup, and it lasts longer for not being cycled hard every winter evening. Homes with a battery already are often the clearest case, because the expensive storage stops being spent on the cheapest possible job.
What's included in the system?
Thermal Dawn Core (thermal store), high-efficiency heat pump (heating, cooling, hot water integration), optional domestic hot water module, smart controls + app, remote monitoring & OTA updates (opt-in). All components backed by comprehensive warranty coverage.
Be There at Dawn
Join the first wave of Australian homes building the thermal infrastructure the grid needs, one home at a time. The first installs are done and running; the next spots are open now.