Duke Energy Plans To Invest $500 Million In Energy Storage

By Frank Andorka, Senior Correspondent

It may not seem like much. After all, it only works out to 37.5 MWh per year. But Duke Energy’s decision to invest $500 million for energy storage in conjunction with its solar portfolio in the Carolinas is still big, given the utility’s ongoing love/hate relationship with solar energy.

The investment will take place over 15 years and will increase battery capacity in North Carolina from its current 15 MW capacity and in South Carolina, well – right now you need a microscope to see its battery storage, so any increase would be immense.

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“Duke Energy is at the forefront of battery energy storage, and our investment could increase as we identify projects that deliver benefits to our customers,” said Rob Caldwell, president, Duke Energy Renewables and Distributed Energy Technology. “Utility-owned and operated projects in North Carolina and South Carolina will include a variety of system benefits that will help improve reliability for our customers and provide significant energy grid support for the region.”

This week, the company filed for a Certificate of Public Convenience and Necessity with the North Carolina Utilities Commission for a solar facility in the Hot Springs community of Madison County as part of a microgrid project.

The Hot Springs Microgrid project will consist of a 2-megawatt (AC) solar facility and a 4-megawatt lithium-based battery storage facility. The microgrid will provide a safe, cost-effective and reliable grid solution for serving the Hot Springs area, and provide energy and grid support to all customers. The project will defer ongoing maintenance of an existing distribution power line that serves the remote town.

The Hot Springs project is part Duke Energy’s Western Carolinas Modernization Project, which involves on-going conversations with community partners to help advance a cleaner energy future for the region. It includes closing a half-century-old, coal-fired power plant in Asheville in 2019. The plant will be replaced with a cleaner natural gas-fired plant and distributed energy resources like solar power and battery storage.

Duke Energy’s long-term solar strategy has traditionally been a “solar for me but not for thee” formulation, building large-scale utility solar farms it controls while both subtly (and not-so-subtly) undermining rooftop solar in the Carolinas.