Eric Fehr, recalled from Hershey of the AHL earlier in the day, scored his first career goal for the Capitals, who had lost two straight and five of six, including a 6-2 defeat to the Hurricanes on Friday night in Raleigh, N.C.
Justin Williams, Erik Cole and David Tanabe scored for Carolina, which has lost four of six.
Ovechkin had a goal and an assist, and his point-scoring streak matches a career best. Kris Beech, Chris Clark and Brooks Laich also scored for Washington,
The Capitals, who were outshot 37-23, took a quick 3-0 lead on three unassisted first-period goals off Carolina mistakes in a 4:45 span.