Technology

Optimized energy storage technology that stores electricity as thermal energy

High discharge power and efficiency makes the Elstor storage system versatile and suitable for a wide range of varying heat and steam needs

The storage capacity does not degrade over time

The storage capacity, as well as the charging and discharging power of Elstor, remain the same year after year. There is no degradation in the storage material over decades of use

Controlled charging and discharging

The charging and discharging process of Elstor Oy’s device can be monitored and controlled remotely. The operation of the device is automated and integrated into the customer’s process.

Efficient storage with low heat losses.

Insulated energy storage minimizes heat losses during the storage phase.

High discharge power and efficiency

Up to 95% efficiency in converting electricity to heat can be achieved. Thanks to the dense storage material and efficient heat transfer, Elstor Oy’s energy storage is capable of high discharge powers.

Modular and mobile

Our system is built from 5 MWh storage elements. The structure is fixed, but it can be moved if necessary.

Real-time system monitoring and autonomous optimization

Our entire process is remotely monitored in real-time. The storage charging autonomously directs to the lowest prices of the day, while discharge is automatically directed according to the customer’s needs.

Technical specifications

High discharge power and efficiency

The charging power of Elstor Oy’s energy storage depends on the storage capacity but can be adjusted to fit the customer’s needs. High discharge power is achieved through dense storage material and efficient heat transfer.

Power and capacity*

Charging power:**

1.5 – 6.0 MW

Storage capacity:

10-40 MWh

Discharge power:**

Max 4 MW

* Values for a single modular 10-40 MWh unit. System can be scaled up by duplicating these units.

** Charging and discharging powers are optimized according the customers needs.

Pressure and temperature

Steam pressure:

Max 20 bar / 290 psi

Steam temperature

Up to 250 °C / 480 °F

Flexibility and reaction time

Charge & Discharge response time:

< 1.0 s

Flexibility range:

0 – 100 %

Frequently asked questions

Our technology is versatile and suitable for various processes.

To what extent of heat demand the device is suitable for?

With a 20 MWh Elstor unit, it is possible to efficiently cover an annual heat demand of up to 10 000 MWh. Technically, the device is capable of even higher consumption, but the benefits of optimization decrease as the consumption becomes excessive.

On what basis is the stated 4–8 year payback period calculated?

The payback period is calculated by comparing Elstor operating costs to the current heat production method, and therefore, the estimate varies depending on the specific case. Electricity and previous fuel prices vary by location.

How much emissions does the manufacturing of your device cause?

The carbon footprint of the device’s manufacturing has been calculated, and it is offset within approximately 6 months of the device’s use.

How do I get Elstor’s device for use?

Start by contacting us. The process begins with gathering basic information and by doing profitability calculations for the system tailored to your facility.

Ready for change?

This is how we make your processes fossil-free

Clean electricity, thanks to Elstor Oy’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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Kari Suninen

Co-founder & CEO M.Sc. (Tech.) in Industrial Engineering & Management

Tuomo Honkamäki

Sales Manager