Hi, Dave,
What is the difference between a trolling and a non-trolling lithium battery? Thanks a lot. — James, 2009 2900 PC
Hi, James,
Thanks for the question, as there seems to be a crossover of lithium batteries used in RV applications and the marine industry. When you said you have a “2009 2900 PC,” I’m going to assume you’re referring to a Phoenix Cruiser, and not the California Penal Code 2900 which came up in a Google search.
Lithium batteries have become a hot button in the RV industry, as most owners are not satisfied with the traditional flooded lead acid (FLA) batteries used for years. They are heavy, require more maintenance, produce gassing while charging, and sulfate, which reduces the power storage capacity.
Almost every RV has a 12-volt direct current (DC) system used for the lights, roof vents, water pump, and any LP appliance such as the furnace and water heater. Both lithium batteries designed for trolling motors and recreational vehicles use the lithium iron phosphate (LiFeP04) technology, so they have similar cells.
Differences between trolling and non-trolling lithium batteries
The differences between trolling and non-trolling lithium batteries are in the design and voltage. Trolling batteries must be designed to take the constant abuse of waves and must be waterproof. Since trolling motors do not need initial high-cranking amps, they deliver power similar to an RV battery for an extended time.
Typically, trolling batteries have lower amp hour (Ah) capacity, as few fishermen troll for days at a time. Several trolling motors require a different voltage than 12-volt, with some at 24-volts and higher. These would not work in an RV without some type of step-down conversion, as almost all components in an RV require 12-volt DC.
Most lithium batteries designed for RV use also have a battery management system (BMS). That is a built-in computer regulating the different charges it might receive from the converter plugged into shoreline power, solar panels, and the engine alternator when driving down the road. The BMS will also monitor temperature. It will either shut down charging capabilities, if the temperature drops below freezing, or turn on an internal heater or heat pad.
With all that said, if you find a lithium trolling motor that is 12-volt, has adequate Ah capacity, and a BMS, it will work in your RV.
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DAVE HAS ANSWERED MORE THAN 1,000 readers’ maintenance and repair questions. Read a directory here. There is so much to learn!
Dave Solberg is a leading expert in the RV industry and the author of the “RV Handbook.”
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