In a game of few clear-cut chances it was Berbatov who made the difference with a well-executed finish in first-half stoppage time.
Jonathan Walters missed a second-half penalty for the visitors who had struggled to get into the game before the interval and are now only a point ahead of the Cottagers in the table.
The winner was Berbatov's ninth goal of the season after moving to west London from Manchester United before the summer transfer window closed, and Jol reckons he can score many more before the end of the campaign.
"Hopefully he will score other goals but we have other players," he said. "Mladen Petric has scored six goals without playing a lot so we have got more players who can make a difference but Dimitar certainly made a difference.
"Dimitar always scores between 15-25 goals and it would be silly to think he won't score 15-20 goals for us and that is what I always had in mind."
Berbatov rushed over to embrace Jol after smashing Fulham ahead and the manager was quick to point out it was the nature of the goal that led to the particular celebration.
When asked why Berbatov had run over to the touchline to celebrate, Jol said: "Because he scored from a volley and I told him a few months ago he doesn't score any volleys any more.
"He used to do that all the time, he tries to prove a point."