HEATSTORE™

HeatStorE™: LOW COST, LONG-DURATION ELECTRICITY STORAGE BATTERY WITH 24/7 DISPATCHABILITY

The 247Solar HeatStorE™ battery is the low-cost solution for the rapidly emerging long-duration grid battery market.

For more than a few hours of grid support, expensive electrochemical batteries become cost-prohibitive.

HeatStorE™ batteries are the perfect choice:

  • Grid support up to 20 hours and beyond, unlike other batteries
  • Can burn hydrogen and other fuels when storage is depleted for 24/7 dispatchability

 



HeatStorE™ SOLVES A PROBLEM

GROWING PV AND WIND DEPLOYMENT REQUIRES LONG DURATION STORAGE

Intermittent PV and wind often generate amounts of electricity that exceed demand. 100s of MW of batteries are being deployed to shift this excess to other times when demand for power exceeds capacity.

Batteries are generally used to bridge this demand and supply gap for short periods, typically 30-60 minutes.

But as more and more PV and wind are added to the system, the gap lengthens. Today, 4 hour-capacity batteries are increasingly used, yet the length of these gaps will continue to grow.

Conventional electrochemical batteries remain cost-prohibitive for these lengthening gaps. To economically satisfy them, new technologies like HeatStorE™ are required.

HOW DOES HeatStorE™ WORK

BREAKTHROUGH HEAT BATTERY TECHNOLOGY

HeatStorE converts zero/low-cost excess power produced by PV, wind, or the grid to ultra-high-temperature heat (up to 1200℃/2200℉) and stores it for up to 20 hours or more.

When power is needed again, typically at a high price, atmospheric-pressure air is circulated through the heat storage system. This ultra-hot air drives a proprietary turbine that converts the heat to electricity without combustion or emissions.

 



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HOW IS THE HeatStorE™ BATTERY MADE


The 247Solar HeatStorE™ Battery combines two breakthrough technologies from 247Solar’s Ultra-High Temperature Technology Platform.

We combine the 247Solar Heat2Power™ Turbine with the 247Solar Thermal Storage System

247Solar Heat2Power™ Turbine

First-ever commercial turbine able to produce power from ambient-pressure hot air without combustion

  • The most reliable air turbine in the world of its class modified to 247Solar specifications
  • Standardized modules of 200 kWe with highly flexible numbers of hours of storage and operation
  • Long service life, measured in decades
  • Can burn fuel, including hydrogen, for 24/7 dispatchability

In collaboration with

247Solar Thermal Storage System

World’s lowest-cost high-temperature heat storage

  • A well-insulated, factory-made container
  • Typically 6-20 hours operation; several days also available
  • Less than 10% the cost of conventional batteries 150+ year proven technology
  • No moving parts, 30+ year life


Standard Heat2Power™ Turbine configuration

Output: 200kW
Capacity: 1.8MWH, 8-10 hours
Footprint: ~30ft x 50ft (10m x 16m)
7500 sq ft/1 MW (800 sq m)

 

 

ADDITIONAL HeatStorE™ BATTERY FEATURES

  • Charging via electric resistance coils
  • Produces power up to 3 days
  • Power capacity from 200 kWe to 100s MW
  • Can burn hydrogen and other fuels when storage is depleted for 24/7 dispatchability
  • Storage costs as low as $50/kWh (depending on hours of storage capacity)
  • More than 20-year operation with little or no performance degradation

ADDITIONAL APPLICATIONS

HeatStorE™ operates almost exactly like electric batteries. But this battery’s cost is lower, plus its benefits may generate additional value streams:

  • Improving overall system reliability
  • Essential System Services, such as frequency control, reserve capacity, energy arbitrage, and displacement of other generating sources
  • Deferment or avoidance of investment in network assets

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