Depending on trim, the previous-generation Sonata Hybrid managed 41-42 mpg in the EPA's city/highway combined estimate, making it one of the least efficient choices in the hybrid sedan segment. By contrast, the 2020 model sips fuel to the tune of 47 mpg combined in most configurations and 52 mpg combined in the eco-friendly (and wallet-friendly) Blue trim. This is right up there with the Accord Hybrid (48 mpg) and the Camry Hybrid (46-52 mpg).
Hyundai says some of these efficiency gains are due in part to its new Active Shift Control software, which makes for quicker, smoother gear shifts and improved fuel economy. Meeting EPA mileage estimates shouldn't be difficult in this car.
Hyundai also offers an optional solar panel for the Sonata Hybrid. It covers the length of the roof between the windshield and the rear glass. It directly charges both the 12-volt battery and hybrid battery pack, and Hyundai says the solar panel can potentially provide roughly 2 miles of extra driving per day because of the extra electricity. Toyota offered a solar roof on the Prius in the early part of the last decade, so it's not an all-new idea, but the Prius' panel could only power the climate control system.