HEATSTORE SOLAR BATTERY SOLUTION
HeatStore™ Provides Clean Power and Heat On Demand 24/7
The HeatStore™ all-night battery stores power as heat instead of electricity. It operates almost exactly like electric batteries but it is the only battery able to operate at full power every hour of the year, even when fully discharged.
HeatStore™ converts power produced by PV, wind, or the grid to ultra-high-temperature heat (up to 1000℃/1850℉) and stores it for up to 12 hours or more. The stored heat can then be used to drive 247Solar’s proprietary Heat2Power™ turbine to produce electricity or industrial process heat without combustion or emissions. Even when fully discharged, the turbine can burn most liquid and gaseous fuels, including hydrogen, for 24/7 dispatchability.
HeatStore™ Solution
The 247Solar Thermal Storage System, which stores the sun’s energy as heat in inexpensive ceramic pellets, powers the turbine when the sun is not shining. The Heat2Power™ turbine can also burn conventional fuels or biofuels for backup.
247Solar’s unique turbine uses atmospheric-pressure hot air instead of fuel to produce both electricity and heat on demand. The turbine features a proprietary ultra-high-temperature heat exchanger, which transfers heat from the Thermal Storage to compressed air inside the turbine.
Coming in 2026…
All-new HeatStore Industrial Heat Battery
1.4MWe/14+MWh
capacity
4.2+MWth industrial
–grade heat
12+ Hour duration
at full output
High system
efficiency
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HeatStore™ Solution and Product Benefits
Long Duration Storage for Clean Power All Night
Stores Energy as Heat Instead of Electricity for Lower Costs
Provides Clean Power and Heat On Demand
Long Duration Energy Storage
All types promote renewable energy and manage surplus power
| Technology | Capacity (MW) | Avg. Duration | Avg. Life Cycle | Ancillary Services | Attributes | Development Stage |
|---|---|---|---|---|---|---|
| HeatStore | 1.4MWe & up | 12+ hrs. & 24/7 dispatchability even when fully discharged | 20+ yrs | Resource adequacy, grid stabilization, synchronous inertia, frequency control, spinning reserves, rate arbitrage, voltage support, replaces gensets | 24/7 dispatchability, scalable, low LCOS | Mature tech., market ready |
| Lithium Ion Batteries | Any size | 30 min – 4 hrs. | 10 yrs. | Frequency control | Current default storage solution, not long duration | Deployed |
| Flow Batteries | 1-20MW | 10-24 hrs. | 25 yrs. | Frequency control | Scalable, power sizing | Deployed |
| Zinc Batteries | 1-20MW | 10 hrs. | 30 yrs. | Frequency control | High energy density, 2% discharge rate | Pilot |
| Gravity | 40kW-8MW | 5-24 hrs. | 30 yrs | Resource adequacy, spinning reserve, <1 ses. response, no freq. control | Scalable distributed, reuse infrastructure, zero self-discharge | Pilot |
Source: Long Duration Energy Storage Association of California (LDESAC)
Our HeatStore™ battery lasts twice as long as conventional batteries.
HeatStore™ Solar Battery Solution Documentation
247Solar provides the first complete application of high temperature, modular CSP for a cleaner renewable energy with higher yields.
INSIGHTS
