My dad has a 2015 1890 BT with a 90 horse merc with power steering. Had it back to the dealership a time or two because it seemed like the batteries would not last a full day fishing. He bought the boat because we pull alot of plugs and really likes the troll down feature. He currently has two 31m odyssey that run his power steering/starting/electronic (one hds7)/lights/livewells. He has now found out that the power steering draws so much power you can only run it 4-6 hours at low speeds before its dead. Not only this but now they say it can cause damage to the motor idling that low which could cause it to over heat.
Seems like a pretty p*ss poor design if you cant even get a full day of fishing out of a $40K set up. 3 options he has buy a kicker, buy a trolling motor or drive it around every couple hours to help cool off the motor and recharge the batteries. All which you should not have to do.
More of just a rant but seeing if anyone has heard of this. I find it hard you can kill two 31m batteries in less then 8 hours of fishing and think that is acceptable.