Have done so many times...there are variables like wind, trolling speed, and what other features are operating(autopilot, speed control, etc.) with wind being the largest variable. If you are set up correctly you can troll for a long time, quite a bit longer than 2 hours. If you intend to troll using the electric motor it pays to run the largest AGM batteries you can fit(I run 31s). If it is too rough or windy I troll using a 9.9 hp kicker motor and only use the electric for added boat control, but in a good wind I’m usually casting.
Mike