What It Really Takes to Build a Utility-Scale Battery Storage Project
Battery Energy Storage Systems (BESS) are becoming indispensable to Europe’s energy transition. But while headlines often focus on battery chemistry, capacity, or falling costs, the reality of delivering a successful project is far more complex.
At Intersolar Europe, Aneri spoke with Mohsen Tabrizi of BESS EPC, who has spent years developing and commissioning utility-scale battery projects across Europe. From grid approvals to commissioning and workforce development, our conversation highlighted the often-overlooked challenges that determine whether a project succeeds—or never gets built.
Here are the biggest takeaways.
Energy storage isn’t optional anymore
One of Mohsen’s strongest messages was that battery storage has moved beyond being a “nice-to-have.”
As Europe adds increasing amounts of solar and wind generation, maintaining grid stability becomes significantly more challenging. Unlike conventional power plants, renewable generation contributes less system inertia, making the grid more vulnerable to disturbances.
Battery Energy Storage Systems help bridge that gap by responding almost instantaneously to changes in grid frequency and demand.
“The question isn’t whether we need energy storage anymore—it’s how quickly we can deploy it.”
This growing importance is also driving demand for skilled professionals who understand not only battery technology but also how these systems interact with the wider electricity network.
The biggest bottleneck isn’t the battery—it’s grid connection
If there was one theme that came up repeatedly throughout our conversation, it was grid permitting.
According to Mohsen, many developers spend months designing projects before fully understanding what the local grid operator will actually approve.
That can lead to expensive redesigns, delays, or projects that simply cannot proceed as originally planned.
His advice is straightforward:
* Engage with grid operators early.
* Understand local grid requirements before finalising system design.
* Treat grid permitting as a critical project workstream—not an administrative task.
As more battery projects compete for limited grid capacity across Europe, preparation is becoming a competitive advantage.
Commissioning is where everything comes together
Receiving planning approvals is only one milestone.
Commissioning—the stage where batteries, power conversion systems (PCS), transformers, switchgear, and software are integrated and tested—is another major challenge.
Every operating scenario needs to be validated before a project can officially connect to the grid.
That includes testing:
* Frequency response
* Grid disturbances
* Black start scenarios
* Communication between all system components
* Overall system performance
As projects increase in scale, successful commissioning becomes just as important as successful engineering.
Europe needs people as much as projects
While much attention is given to manufacturing batteries, Mohsen believes one of the industry’s biggest shortages is skilled personnel.
He highlighted growing demand for:
* Commissioning engineers
* Operations & Maintenance (O&M) engineers
* Technical service specialists
* Grid integration experts
As thousands of battery systems are deployed over the coming decade, maintaining and operating these assets will become a significant industry in its own right.
For engineers considering a career in clean energy, battery storage represents a rapidly expanding opportunity.
The market is only getting started
Despite rapid growth, Mohsen believes Europe remains at the beginning of its battery storage journey.
Germany alone has ambitious deployment targets, while increasing renewable generation continues to create demand for flexible storage capacity.
Equipment costs are expected to continue falling, permitting processes should become more efficient as regulators gain experience, and project pipelines will mature.
Importantly, he cautioned against waiting for the “next generation” of battery technology.
Innovation will never stop. Waiting for the next breakthrough simply means missing today’s opportunities while another technology is already around the corner.
Final Thoughts
One of the most valuable insights from this conversation is that successful battery projects depend on much more than selecting the right technology.
They require expertise in permitting, grid integration, commissioning, operations, and long-term asset management.
As Europe’s energy transition accelerates, the winners won’t simply be those with the best batteries—they’ll be those who know how to navigate the complexity of bringing large-scale energy storage projects from concept to commissioning.
🎥 Watch the full interview to hear Mohsen Tabrizi share practical lessons from developing utility-scale BESS projects, why grid permitting remains the industry’s biggest hurdle, and the skills the next generation of energy storage professionals will need.
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