About Us

Ferroamp is a Swedish greentech company focused on energy and power optimization of properties. The Ferroamp system maximizes the benefits of solar panels, electric vehicle charging, and battery storage by connecting them to a DC grid, allowing property owners to control and manage their electricity usage and take control of their grid connection.

Society must transition to a sustainable energy supply. Electrification is the key, and with Ferroamp, every property becomes a resource in the grid, contributing to the flexibility needed as the share of renewable electricity production increases.

Our Vision

Our vision is a world powered by 100 percent renewable, reliable electricity.

Our Mission

Our mission is to optimise the use of electricity and provide our customers with tools and sustainable innovations to enable them to be part of the energy revolution.

Our Offering

We offer our customers the tools to control their electrification and explore new business models by owning their grid connection

Our Values

Pioneering innovation - Customer focus - Stronger together

Warning: False messages regarding employment

There are currently false messages circulating where the sender pretends to be Ferroamp, or one of Ferroamp’s employees, where the recipient is stated to be interesting for an employment with Ferroamp. In some of the messages, the recipient is asked to download an online interview software and claims to be recruiting to a fictitious facility in the United States.

Ferroamp has nothing to do with these messages. The case has been reported to the authorities and we are working to get the pages that illegally use our trademark to shut down. You can only apply for a position at Ferroamp via the form on our website.

Phase balancing is the foundation

It all started with Björn Jernström’s development of dynamic phase balancing to reduce the main fuse in his newly purchased villa in Järfälla. Step by step, innovation by innovation, it has evolved into a smart microgrid that is now present in thousands of homes and properties in Sweden.

Hardware and software

The Ferroamp system provides the property with a flexible infrastructure for daily electrical services a household or business needs. Ferroamp continuously develops the software and updates sold systems with new functionality over the internet as the electricity market and the world change.

Swedish innovation at the forefront

Phase balancing, DC grid, solar string optimizers, and PowerShare. Since its start in 2010, award-winning innovations have been pouring out of the headquarters in Spånga, just outside Stockholm. A world-leading team of innovators and developers now accompanies Björn Jernström.


In 2021, Ferroamp was named by the Financial Times as one of the 50 fastest-growing companies in Europe, and the growth journey has only just begun. The need for renewable energy and more efficient electricity usage is increasing worldwide, and Ferroamp is ready to deliver the solutions.












Ferroamp is founded

Björn Jernström founded Ferroamp, based on the now patented innovation that improves the use of a three-phase supply, ACE – Adaptive Current Equalization.


Pilot installations

The first pilot installations for phase balancing are carried out, and the first patents are secured.


Phase balancing and Energy measurement

The first commercial customer order for managing phase balancing and energy measurement is delivered.


Solar power and energy storage

The first commercial customer order integrating solar power and energy storage is delivered.



The first installation of PowerShare, connecting multiple Ferroamp systems, is carried out.


Stock exchange listing

Ferroamp is introduced on Nasdaq First North Growth Market.



Work on industrializing production begins. Manufacturing is outsourced to subcontractors.


Integration with electric vehicle charging

Electric vehicle charging can be integrated and controlled in the Ferroamp system.


Volume production

Key agreements are signed with suppliers and resellers to meet the sharply rising demand for the company’s products.

Member of


Ferroamp was in 2023 rewarded with a bronze medal in the first evaluation of the company by EcoVadis. Ferroamp takes a broad responsibility for sustainability in the effort to electrify society.

Ferroamp is a leader in the development of electrification within and between buildings. The many innovations that make up the Ferroamp system have been recognized and awarded in many contexts, both in Sweden and internationally.

FT 1000 Europe’s Fastest Growing Companies 2021

Intersolar Award 2020

Global Cleantech 100 one to watch 2019

Global Cleantech 100 one to watch 2018

PV Magazine Array Changing Technology Award 2018

The Smarter E Award Intersolar 2018

Intelligent Energy Management Challenge 2016

EES Award Winner 2016

Global Cleantech 100 one to watch 2016

Skanska Deep Green Challenge 2015