How we replaced a multi-substation grid setup with just one single, high-capacity 6400 kVA unit, dramatically lowering the client’s total internal grid infrastructure costs.
How we replaced a multi-substation grid setup with just one single, high-capacity 6400 kVA unit, dramatically lowering the client’s total internal grid infrastructure costs.
Location:
Timeline:
Client:
Scope of work:
Engineering, design modification, and first-in-house assembly of a mega-capacity compact secondary substation (CSS).
Technical Specification:
Reducing Multi-Station Complexity for a 5.2 MW Park
Deploying a 5.2 MW solar park on the west coast of Sweden typically requires installing multiple compact substations scattered across the site to handle power step-up and grid connection.
However, multi-station configurations heavily increase the client’s capital expenditure, require complex internal cabling, and significantly multiply long-term maintenance overhead. Lysekil needed a streamlined, highly cost-effective grid connection model that could compress high-density power distribution without sacrificing safety or project timelines.
A Single Mega-Station to Replace Multiple Units
Harju Elekter pioneered a consolidated grid solution by manufacturing the massive HEKA1SM6300-1 compact substation. Instead of multi-unit distribution, we engineered a single mega-station capable of delivering up to 6400 kVA, a power class usually reserved for massive 20+ MW solar parks.
To build this highly advanced substation type in-house for the very first time, our teams successfully overcame major mechanical and layout adjustments, re-engineering sheet metal component designs and optimising our internal assembly workflows to seamlessly integrate the heavy ABB RMU and dual-winding transformers.
Lower Total Cost of Ownership and a Single Point of Maintenance
The Lysekil Solar Park launched successfully with a clean 5.2 MW output, powered entirely through a single, centralised connection point. By replacing several traditional substations with just one HEKA asset, the client achieved a substantially lower total cost of ownership for their internal grid and left themselves with only one unit to maintain.
This project serves as a strong internal reference, proving Harju Elekter’s capability to deliver high-tier, cost-efficient energy solutions that make solar developments more profitable and sustainable.
