In many cases, projects combine these technologies. Enfield-based Halifax EMC recently partnered with the North Carolina Electric Membership Corporation to pair solar power with battery storage.

“With this [solar + storage] project, we are capturing a renewable resource when it’s most abundant, storing it and discharging it exactly when it’s needed — there’s a lot of potential here.”

“Solar energy is most abundant during the middle of the day, but demand peaks in the late afternoon hours in the summer and early in the morning during winter,” said Jimmy Wilkins, vice president of Portfolio and Resource Optimization for North Carolina’s Electric Cooperatives. “With this [solar + storage] project, we are capturing a renewable resource when it’s most abundant, storing it and discharging it exactly when it’s needed — there’s a lot of potential here.” 

Of the total planned U.S. capacity, utility-scale solar accounts for 41 GW. New battery storage capacity, which can help make power grids more resilient and reliable, accounts for 10 GW. In North Carolina, electric cooperatives are deploying utility scale batteries at 10 sites around the state to provide 40 MW of power 

The remainder of planned U.S. capacity additions over the next two years will largely come from natural gas (16 GW) and wind (15 GW). 

“The amount of planned wind capacity dropped by nearly half from the previous two years, which had 29 GW of new wind capacity come online,” EIA said.