OUR SOLUTION

HeatStorE™ overnight heat battery with 24/7 dispatchability

247Solar’s HeatStorE™ long-duration thermal battery converts electricity from wind turbines to heat and stores it for 9 hours or more in inexpensive materials like sand or iron slag. Yet, HeatStorE operates almost exactly like conventional electrochemical batteries. And uniquely, HeatStorE provides guaranteed power even when fully discharged. The system provides its own backup by burning almost any locally-available fuel, including hydrogen, when its thermal storage is depleted. HeatStorE furnishes round-the-clock baseload power to enable wind farms to deliver 24/7 clean electricity.

Benefits include

Clean power overnight and in any weather
Load shifting of 8 hours or more to avoid demand charges
Eliminates gensets by acting as its own backup
Creates a revenue stream where PV oversupply is substantial and electricity costs are negative
Low maintenance and operating costs
No safety or environmental hazards

EXAMPLE

Because a grid in South Australia includes so much PV and wind during the day, it curtails the solar output of an Australian 400kW PV farm by 30-35%. In fact, there is so much excess power on the grid that the utility pays users to take it (negative LCOE). Conversely, during evening and early morning peaks when the sun is not shining, the grid pays a premium for power.

Energy Requirements

200kW long-lasting electricity storage to capture excess grid power, harness otherwise-curtailed energy from PV, and facilitate load-shifting overnight

Solution

A single 247Solar 200kWe, 1.8MWH HeatStorE™ long-duration thermal battery

Outcome

Up to AU$100,000 additional revenue per year for the PV farm
New revenue stream from grid operator
Fully utilized output from PV
Lower overall electricity costs due to load-shifting

24/7 PV Farms - Case Study

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