Mirefield

Mirefield simulates cell degradation so battery teams can cut a test cycle from months to weeks without pretending physics went away.

Climate Seed 2022 Stockholm Active
Wind turbines in daylight
Climate. Stockholm.
Why we investedClimate / Seed 2022

What we saw in Mirefield.

Battery development is gated by physical testing. Every week saved in simulation is a week earlier to market, and the industry is short on both time and test rigs.

Elin spent seven years in cell development and built the model to answer her own questions. Two manufacturers were using it before the company existed.

Deep technical sale, small number of buyers, high contract value. That combination usually works when the founder is credible in the room.

At a glance

The company in short.

Founded
2021, Stockholm
Founders
Elin Sandberg and Jonas Ek
Sector
Climate
First cheque
Seed, 2022
Our role
Led the seed
Status
Active
Milestones

How Mirefield has moved.

2021

Founded in Stockholm by two battery engineers.

2022

Rifatela led the $4.5M seed.

2025

Working with nine cell manufacturers across Europe and Asia.

Building something in this space?

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