A new and distinct cultivar of Red Hot Poker plant named Kniphofia ‘;Solar Flare’; with long, gracefully-arching, strap-like, keeled, glaucous, gray-green foliage and numerous scapes beginning in early summer and repeating though early fall. Habit is densely-growing, winter-hardy and tolerant of heat. Numerous scapes with dense flowers of bright-yellow flowers. The new plant is useful for landscaping as a specimen, en masse, or as a long-lasting cut flower.