![]() ![]() My WFCO failed and took my flooded golf cart batteries up to 16V plus volts. The key concern is not undercharging, which won't hurt a Li battery, (just limits useful capacity) but overcharging during bulk or equalization mode. You will either need to disconnect your 7 way whenever you stop for more than an hour or so or set up that circuit with a relay so it's switched off when the ignition is off (some already are), otherwise the converter will happily continue to charge the Li battery if it is low,discharging your tow vehicle starting battery in the process.Īs you can see, much of the cost and most of the work is involved with the charging sources and wiring, not with the Li battery itself, which is getting pretty inexpensive now.īattle Born recommends using a high quality ac charger specifically configured for Li batteries. That will typically have a 3O amp breaker so a 20 amp converter would be a good choice. The DC/DC converter should be sized based on the ampacity of your 12V trailer supply. You need to run that into a DC/DC converter located in the trailer, before that wire connects to anything else in the trailer. You do not need to run a separate charge circuit, the +12V pin on your 7 way connector will work. ![]() Generally the alternator charging is the most complex to convert. ![]() The on board lead acid battery charger can be swapped out, and most modern solar charge controllers have a Li setting. Those include the on board Ac/DC charger, alternator charging from the tow vehicle, and solar charging if you have that. The BMS should come with the battery and is typically internal.Ĭonvert and/or reconfigure all charging sources for Lithium battery use. The battery must have a battery management system (BMS) that equalizes cell charge voltage and protects the battery from overcharging. Place the battery in a heated location, never charge a Lithium battery below freezing temps. ![]()
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