Alliant Energy Wood County Battery Energy Storage Systems (BESS)

As part of their Clean Energy Blueprint for transitioning to cleaner, renewable energy, Alliant Energy is constructing new battery storage facilities, near two of their recently completed solar projects in Wisconsin to maximize their renewable energy assets’ value. The first of these battery facilities is nearing completion this year in Wood County. Led by JP Cullen, this new storage facility marks a significant enhancement in energy storage capabilities, featuring a 75 MW system that can capture and redistribute solar energy to power approximately 80,000 homes for four hours. This technology allows for energy storage during periods of low demand, which can be used later to maintain a consistent energy supply.

Our construction approach has incorporated innovative techniques, notably recycling existing materials for backfill to optimize resource use and mitigate environmental impact. Our team installed 96 Battery Energy Storage Systems (BESS) containers, each weighing 80,000 lbs., which are lithium-ion storage units designed to store and redistribute solar energy efficiently. Our millwrights also installed 24 Power Conversion System (PCS) containers, enhancing the system’s energy conversion capabilities.

This project demanded a wide range of expertise, from civil and electrical work to structural engineering. Our tasks included precise earthwork, extensive underground utilities, and constructing robust concrete foundations that support large-scale battery storage units.

This project shows how committed we are to sustainable construction. The Alliant Energy BESS Battery Storage Facility in Wood County is a great example of JP Cullen’s focus on renewable energy and making the grid more reliable. With careful planning, skilled tradespeople, and solid teamwork, this project doesn’t just meet our client’s needs today—it also helps pave the way for future energy developments. By storing solar energy when demand is low and sending it back when needed, these batteries reduce waste and make the grid more efficient, which supports both community growth and the environment.