Peak shaving with solar and battery storage

The challenge

Fast charging at Bæjarháls created high power peaks and pressure on the grid connection. With growing demand, capacity charges rose and the site was heading for a larger connection. ON also wanted hands-on experience with solar and batteries in charging infrastructure, little tried in Iceland.

What we did

• Designed a system with 100 kW solar PV and a 466 kWh battery integrated with the fast chargers
• Defined the system architecture, control strategy and peak shaving
• Wrote the requirements for the battery system and EMS communication
• Ran the procurement, evaluated solutions and selected within budget, in dialogue with suppliers and contractors

Outcome

• A lower peak on the grid connection and better use of it
• 100 kW solar PV and a 466 kWh battery in operation
• A pilot that provides operating experience for other charging sites

Lesson

As fast charging grows, energy management becomes as important as the chargers themselves.

Related services

• Battery storage and energy management