Can you use two 12-volt batteries wired in series with a 12-volt trolling motor?
No. Wiring in series stacks the voltage being delivered. Two 12-volt batteries in series deliver 24 volts, which causes permanent damage and a fire hazard in a 12-volt trolling motor. Wire the batteries in parallel for increased amperage while maintaining 12 volts.Source:Capt. TJ Hinton; commercial fisherman; Gulf Coast, Miss.National Renewable Energy Laboratory: Solar Electric Fundamentals (PDF)More Information:Southwest Tech: Parallel CircuitsSouthwest Tech: Series CircuitsU.S.