S4 Energy is at the forefront of the rapidly evolving energy sector, specializing in large-scale Battery Energy Storage Systems (BESS). These systems are key to stabilizing the grid and enabling the seamless integration of renewable energy sources like wind and solar. Our solutions enhance grid stability, reduce energy volatility, and allow energy arbitrage—buying electricity at low prices and selling during peak demand.
We manage the entire process, from site acquisition to the operation of battery assets, ensuring efficiency and sustainability. Our innovative approach helps grid operators, utilities, and industries reduce reliance on fossil fuels and meet sustainability goals.
Backed by Castleton Commodities International (CCI), a leading global energy commodities merchant and infrastructure asset investor, S4 Energy is poised for significant growth across Europe.
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Within S4 Energy we foster a culture where we take ownership for our actions and the results of our team. We support our colleagues, seek opportunities, address issues before they escalate, and drive a positive mindset.
Reliable to S4 Energy means being dependable, accountable and transparent. But also consistently delivering on promises and commitments. This ensure trust and long-term success.
At S4 Energy, we make choices that are environmentally friendly, economically viable, and socially responsible. Sustainable also means fostering a supportive and respectful workplace. Embracing sustainability ensures long-term success and a positive impact on the environment and our team.
Development of KINEXT begins and basic patents are applied for.
S4 Energy is established as an independent company.
Full scale prototype is installed at the premises of DNV.
Interactions between systems and services can now be managed.
Approval for the system to be installed in Dutch national grid.
Almelo production facility of KINEXT flywheels starts up.
Hybrid KINEXT and battery system of 9 MW /
7.2 MWh in Almelo.
Heerhugowaard facility with 13 MW / 9 MWh hybrid energy storage system.
Castleton Commodities International LLC becomes major shareholder of S4 Energy.
Peak power delivered to the crane; no larger grid connection needed.
