Transform your process to completely fossil-free

– economically

Industrial steam and heat production processes rely on fossil fuels, resulting in significant carbon dioxide emissions. Industrial process heat production accounts for an 18% share of the entire energy consumption in Europe, with the majority of this production relying on fossil fuels.

89 %
Industrial steam produced with fossil fuels in Finland
Fossil fuels are a depleting natural resource, causing a significant emission burden and cost for the user.
12 TWh
Industrial heat and steam produced with fossil fuels
The poor efficiency and inflexible production of fossil fuels result in additional costs and emissions.
3 Mt
CO2 emissions from industrial process heat and steam production
The emission reduction potential in Finland alone is enormous. Emissions from industrial process heat and steam production account for approximately 7% of Finland’s total emissions.
Elstor energy storage container in 3D model picture


Genuinely fossil-free steam for process industries

Elstor provides a cost-effective and clean alternative for process heat production. We efficiently replace fossil fuels in industrial steam and heat production, reducing annual CO2 emissions by up to 480 tonnes per basic unit

480–1700 t
carbon dioxide emission reduction with one Elstor basic unit
The emission reduction depends on the capacity, usage, and previously used fuel. Elstor eliminates operational emissions by using clean electrical energy.
95–97 %
Power-to-heat efficiency of Elstor system
Elstor’s device achieves a high efficiency through precisely optimized production and storage charging. Steam production adjusts completely according to the customer’s consumption.
6 months
During operation, Elstor’s device has offset the carbon dioxide emissions resulting from the device’s manufacturing
The CO2 emissions generated during the manufacturing of the device have been offset within approximately six months of use. After this, every saved tonne of CO2 is pure profit.

How does it work

Charge with inexpensive electricity and use it when needed

Our thermal storage solution efficiently stores electricity during the cheapest hours of the day as thermal energy. The stored energy is used for generating heat and steam. The operating costs of the equipment are competitive with fossil fuels.


Charging with electricity during the lowest price periods

Elstor’s energy storage charging is optimized for the lowest electricity prices throughout the day. An artificial intelligence-based charging algorithm automatically selects the required charging hours by monitoring the storage capacity, upcoming electricity prices, and predicted heat demand

Stored in a patented high-temperature energy storage

Thanks to the storage capacity, the lowest electricity prices and the heat demand of industrial processes align. Due to optimized charging, the operating costs of Elstor’s device are lower than those using fossil fuels

Discharged from storage as heat or steam when needed

Elstor’s device charging and discharging processes are completely independent. This enables flexible use of heat to meet varying needs in industrial processes. The adjustment of the discharge from the storage can be smoothly controlled within the range of 0–100%.

For whom

Real-world tested energy storage for the process industry

Elstor’s energy storage systems have been in use in the process industry since 2021. The operational experiences have been positive both in terms of cost reduction and production flexibility. Elstor’s device is suitable for various industrial sectors due to its flexible steam production.

Food production line

Food Industry

Chemistry equipment

Chemical Industry

Production facility from air

Energy Production

Other process industries


790 t/year
mitigated carbon dioxide emissions


  • Double-unit with 10 MWh storage capacity
  • Has replaced light fuel oil in process steam production
  • Annual emission reductions 790 tonnes
320 t/year
mitigated carbon dioxide emissions

Lappeenrannan Lämpövoima

  • Basic unit with 5 MWh storage capacity
  • Replaces natural gas in production of district heating
  • Annual emission reductions 320 tonnes
< 300 t/year
mitigated carbon dioxide emissions

Kaskein Marja

  • Basic-unit with 5 MWh storage capacity
  • Replaces the usage of natural gas in process steam production
  • Emission reduction potential up to 300 tonnes per year
Elstor logo
340 t/year
mitigated carbon dioxide emissions

Oy Roberts Ab

  • Basic-unit with 5 MWh storage capacity
  • Will replace natural gas in process steam production
  • Annual emission reduction estimated at 340 tons.


Ready for change?

This is how we make your processes fossil-free

Clean electricity, thanks to Elstor’s thermal storage, is a cost-effective alternative to fossil fuels. The technical specifications of the storage may vary by application, but emissions remain zero. Contact us, and we will provide profitability calculations for a customized system tailored to your needs.

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Solution & Technology