Variable and intermittent renewable energy

Power grids are facing increasing challenges as renewable energy sources replace fossil fuel generation.

High levels of wind and solar are stressing the operation of power systems, leading to high volatility in prices and security of supply challenges. In some places even significant amounts of renewable energy is being curtailed due to supply and demand mismatch. An efficient energy storage solution is needed to facilitate the absorption and redispatch of fluctuating renewable energy.

EnergyNest offers a cost-effective and highly efficient Thermal Battery that can be connected to the local grid or power generation facility and charged using excess available electric energy from renewables. The stored thermal energy can be discharged to provide electricity back to local communities, while also providing process heat for manufacturing industries, desalination, or district heating.

Revenue opportunities

  • Sell more electricity during peaks
  • Sell less electricity during off-peak
  • Avoid costly grid imbalance fees
  • Avoid capital expenditure in peaker generation
  • Fossil fuel savings
  • Power to heat

Case example

EnergyNest is currently developing a Thermal Battery for a combined heat and power (CHP) facility. The battery is charged with excess electricity from a nearby wind park. This allows independent power producers to reduce curtailment when renewables produce more power than the grid can absorb. Unlike Lithium batteries, the Thermal Battery allows a long discharge duration, from several hours to several days, enabling uninterrupted supply during long power deficit periods. The Thermal Battery effectively reduces the high logistics cost, fluctuating prices and polluting emissions of fossil fuels that would otherwise be used in gas turbines and diesel gensets. This allows for a greater penetration of renewables through low cost, large-scale, long-duration storage.


  • More than 3.7 € million in yearly revenue
  • CHP asset owners actively bid their power in wholesale day-ahead markets, in addition to providing load in balancing markets
  • Local wind developers avoid imbalance fees
  • Renewable heat provides peak shaving for the local district heating network

Thomas Palkovich

VP Project Development

+47 9820 8384