The Sam Thomas-trained seven-year-old claimed the Bateaux London Gold Cup Handicap Chase at the end of October with Charlie Deutsch on board.
Going off at 11/2, it was Our Power's first win since January 2022, despite going close in two Grade 3 races in February and March.
Thomas said: "Our Power is still on course for the Coral Gold Cup (Newbury, November 26) - it is all systems go for that race. He has come out of the race well and we were really impressed with that run.
"He was a bit big before the race and I was pleasantly surprised when he won."
Meanwhile, stablemate Good Risk At All, who won a valuable handicap hurdle at Ascot in February, made a successful return to action at Carlisle.
"Good Risk At All won at Carlisle and we were very happy with him. He loves soft ground and he is going to stay three miles, so we were very happy to get the ball rolling with him first time out.
"He has progressed from last season and we are looking forward to getting him out again the following weekend."