The Short Version
This claim is true. According to the U.S. Energy Information Administration's February 2026 data, solar (51%), battery storage (28%), and wind (14%) together account for 93% of the 86 GW of planned utility-scale capacity additions in 2026 — comfortably exceeding the 90% threshold. These figures are corroborated by multiple independent energy publications. The data reflects planned additions as currently reported and could shift slightly as projects are updated, but the 3-percentage-point margin above 90% makes a drop below that threshold unlikely.