How Holtab built its own microgrid
As dependence on electricity continues to grow, higher demands are being placed on solutions that can maintain operations even when the power grid is disrupted. When Holtab built its own microgrid in Tingsryd, the goal was not only to secure its own operations but also to gain experience that could help others.
“The experience means that we can support other organisations that want to strengthen their energy preparedness as well as their overall business continuity work,” says Mohamed Ezzo, Head of Innovation at Holtab.
The decision to build a microgrid originated in Holtab’s ambition to become a net electricity producer – in other words, to generate more electricity than it consumes. A first step was to measure how much power different parts of the factory and the head office in Tingsryd actually use. Digital monitoring of loads and flows provided a precise picture.
“Because we already had a high level of digitalisation in our electrical installation, we had a strong starting point for building a microgrid. We were able to base the continued work on accurate measurement data,” says Mohamed.
Production secured with backup power
Holtab built a microgrid with integrated backup generation, smart switching and systems for control and monitoring of electricity use. The backup power solution enables the factory to operate in island mode and maintain production even if the main power grid is down.
At the Tingsryd site, there are two incoming substations, each equipped with a backup generator of different capacity.
Following installation, several tests were carried out both during and outside ongoing production, where a total power outage was simulated. The microgrid then automatically switched to backup power and started up the facility.
“We tested starting from a complete blackout, and it worked exactly as intended. We are very satisfied with the solution,” says Mohamed.
Three benefits of having your own microgrid
Secure deliveries
With an island mode solution, organisations can maintain production even when the main power supply is unavailable. Holtab has a facility that can operate at full capacity for extended periods during power outages, strengthening delivery capability and reducing vulnerability – not only internally, but also for customers.
Increased resilience in society
When companies can manage their own power supply during outages, the load on the main grid is reduced. This contributes to increased societal resilience during major disturbances. Through islanded operation, production can continue and help ensure that Sweden keeps functioning even in challenging situations.
Practical experience
Building a microgrid – and enabling island mode operation – involves more than installing a backup power solution. It requires an understanding of how the electrical system is structured, which functions are business-critical, and how islanded operation should be dimensioned and controlled. Hands-on experience from a completed project provides valuable knowledge in an increasingly electricity-dependent society.
Prepared for further development
Holtab has several solar PV installations and the possibility to connect energy storage systems, which could be integrated into the microgrid and make it even more flexible.
“This is an ongoing effort that goes beyond power supply alone. It is part of Holtab’s overall continuity work, which also includes IT security, emergency preparedness and building resilience. Our microgrid is prepared for further development.”
Many organisations face the same questions Holtab did: Which parts of the business must function during an outage? Where should we start? What size generator is needed? Where should backup power be connected? What does it really mean to build robustness and resilience?
“We can guide others through the entire process – from needs analysis and measurement to dimensioning and dialogue with suppliers. And of course, we can deliver the substation solutions that tie everything together. It feels good to be a reliable partner at a time when electricity is more critical than ever.”
Microgrids strengthen Holtab and its customers
Holtab has long experience in secure power solutions, prefabricated systems and customer-focused technical development.
Building its own microgrid was a natural and concrete step in that journey. “This project has made us stronger as a company, but above all it has given us knowledge that we can share. Holtab’s DNA is built on our values – knowledge, service and collaboration – so sharing our journey comes naturally to us,” says Head of Innovation Mohamed Ezzo.
Read more about Holtab’s microgrid:
Do you know the difference between island mode and a microgrid?
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Contact
Mohamed Ezzo
Head of Innovation
