What size battery for electric boat motor?
Battery capacity – amp hour rating we suggest selecting a 12-volt deep cycle marine battery with at least 110 amp hour rating. Usually group 27 size or larger. The higher the amp-hour rating, the more run time your trolling motor will receive. In general, a 100ah trolling motor battery will run a 55 lb thrust trolling motor for about 2 hours at full throttle, 4–5 hours at 50% speed, and up to 8–10 hours at 25% throttle, which is enough to meet a full-day fishing experience for anglers.For longer fishing days (4–8 hours), go for a 12V 100Ah lithium battery for better endurance and lighter weight.In general, a 100ah trolling motor battery will run a 55 lb thrust trolling motor for about 2 hours at full throttle, 4–5 hours at 50% speed, and up to 8–10 hours at 25% throttle, which is enough to meet a full-day fishing experience for anglers.A 30lb trolling motor on max speed will pull about 25amps. You would have 4hrs run time with a 100ah battery. Mid speeds you would have about 8-10hrs run time. You’re never going to run it continuously or very rarely.
Can you use a lithium battery for an electric boat motor?
Lithium Iron Phosphate (LiFePO4) marine batteries are becoming a more common option for powering trolling motors, fish finders and other accessories. Lithium iron marine batteries (LiFePO4): Exceptionally durable and fully sealed, they weigh half as much as flooded lead acid batteries and last 10 to 12 years.