Lithium iron phosphate batteries are a truly multi application battery type so the one battery or battery bank can be used to provide propulsive power for the electric motor for boats/s as well as to supply all the electrical loads on a boat. Normally the electric motor requires a voltage of 36V, 48V or higher voltage while 12V is required for house power, radios, Lithium battery bank navigation lights, etc. In this case a suitable DC/DC converter should be used to provide the lower voltage from the higher voltage main battery bank. It is very bad practice and still used by some manufacturers to simply tap off 12V from a single battery in the main battery pack to supply this lower voltage. This can lead to uneven discharging of different batteries due to varying loads which can further result in some batteries being over charged while others end up being less than fully charged. By fitting a DC/DC converter all batteries are discharged evenly regardless of varying loads.
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One way a battery buyer can gauge the quality of any particular battery brand is to check what kind of warranty the manufacturer/supplier will provide and whether it is a factory backed warranty or only a distributor backed warranty in the country of sale since many distributors of Chinese batteries are required by law to provide a minimum warranty period when a battery is sold in a western country. If a battery manufacturer is not prepared to stand behind their own products by providing a lengthy factory backed warranty then it is best to steer well clear of these companies so as to avoid any possible headaches in the future. electric motor for boatsChinese battery cell manufacturers will often assemble their cells using less expensive manufacturing techniques thereby reducing the final cost of the battery to the customer at the expense of shorter cycle life and/or poorer performance. For example some manufacturers will simply crimp end terminal caps on the cells while other manufacturers will spot weld or even fully laser weld the cell ends. Obviously a cell which is merely crimped will be cheaper to manufacture than a cell which is fully laser welded. By the same token the crimped cell is also more prone to fail prematurely due to slow ingress of moisture, humidity and other atmospheric contaminants which in a laser welded cell are totally excluded from entering the cell for the life of the cell. It really is a case of having to pay more for quality. By paying more for a quality battery a great deal of frustration can be avoided and allow the electric boat owner to enjoy the tranquillity of silent, electric boating without any noise or exhaust fumes. There are a handful of manufacturers of A grade quality Lithium Iron Phosphate batteries which will outlast several lead acid batteries and provide vastly superior performance and thereby bring much enjoyment to the owner of the electric boat they are fitted in. Electric boats are definitely not a new concept. What is believed to be the very first marine outboard motor was invented in 1880 by a French inventor, Gustave Trouve, and it was electric.
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