# Fever Energy

> Fever Energy is a Stockholm-based energy flexibility platform that lets utilities and energy retailers aggregate home batteries, EVs, solar and heat pumps into their own virtual power plant, and trade that flexibility in FCR-D, FCR-N, FFR, aFRR and mFRR markets across Sweden, Denmark and Finland. Energy companies including Vattenfall, Svea Solar and Greenely run their flexibility services on Fever, with 600 MWh+ under management.

Key facts:

- Legal name: Fever Energy AB (org. nr 559397-9650), founded 2022, headquartered in Stockholm, Sweden.
- What it is: B2B software. Fever does not sell to households directly. Energy companies use it to launch home energy management and flexibility services under their own brand.
- Three ways to use it: pre-built apps and market integrations, embedded UI components in the customer's own app, or APIs connected to the customer's own systems.
- Live markets: Sweden (FCR-D, FCR-N, FFR, aFRR, mFRR), Denmark (FCR-D, FCR-N, aFRR, mFRR) and Finland (mFRR).
- Recognition: ranked #6 on the Sifted 100: Nordics 2026 list of fastest-growing companies.
- Not to be confused with: the EU Horizon 2020 research project FEVER, or the live-entertainment company Fever (feverup.com).

## Company

- [Home](https://www.fever.energy/): Overview of the platform, customers and results
- [What we do](https://www.fever.energy/what-we-do): How Fever helps energy companies turn flexibility into a business
- [Customer stories](https://www.fever.energy/customer-stories): How energy companies run flexibility services on Fever
- [Talk to us](https://www.fever.energy/talk-to-us): Contact the team

## Platform

- [Platform overview](https://www.fever.energy/platform): All modules, core services, interfaces and hardware
- [Connect](https://www.fever.energy/platform/connect): Bring cloud-connected and gateway-based assets into the platform
- [Predict](https://www.fever.energy/platform/predict): Forecasting of flexible capacity
- [Optimize](https://www.fever.energy/platform/optimize): Combine end-customer savings with market revenue from the same assets
- [Trade](https://www.fever.energy/platform/trade): Qualify, dispatch and trade flexibility in balancing markets
- [APIs](https://www.fever.energy/platform/apis): Integrate Fever into your own systems
- [View](https://www.fever.energy/platform/view): White-label app for end customers

## News and insights

- [Vattenfall builds its smart steering service for batteries on Fever](https://www.fever.energy/news/vattenfall-natverka-batteri) (September 2026)
- [Fever Energy is #6 on the Sifted 100: Nordics](https://www.fever.energy/news/sifted-100-nordics-2026) (September 2026)
- [The performance gap between battery optimisers is widening](https://www.fever.energy/news/performance-gap-battery-optimisers) (June 2026)
- [Fever Energy is now live in Denmark](https://www.fever.energy/news/fever-energy-is-live-in-denmark) (October 2025)

## Optional

- [News](https://www.fever.energy/news): All company news and articles
- [LinkedIn](https://www.linkedin.com/company/feverenergy/): Company updates