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Boat Wiring~ Onboard charger and trolling motor
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<blockquote data-quote="Slappy" data-source="post: 342723" data-attributes="member: 7608"><p>Whether receptacle or direct wire, make sure to use correct wire gauge for your run length according to the chart on page 21 of the minn kota manual. Don't just wire into an existing receptacle or bus board without knowing the wire supply is good.</p><p><a href="https://minnkotamotors.johnsonoutdoors.com/sites/johnsonoutdoors-store/files/assets/misc/MI/M/MIN_productmanual_Terrova-BT-EN/MIN_productmanual_Terrova-BT-EN.pdf" target="_blank">https://minnkotamotors.johnsonoutdoors.com/sites/johnsonoutdoors-store/files/assets/misc/MI/M/MIN_productmanual_Terrova-BT-EN/MIN_productmanual_Terrova-BT-EN.pdf</a></p><p></p><p>Also follow the manual for wire gauge and splice location on the charger leads. Minn Kota has a $50 rebate offer right now. Others might too.</p><p></p><p>I never disconnect for charging because anything designed to use 12v DC is or should be designed to handle at least a few volts higher (and proportionally so for 24/36v). I can't find a spec for minn Kota but Lowrance graphs allow for up to 17v max. Smart chargers typically put out less than 15v, so I don't hesitate to use my graph in the garage even if it's charging. Motor rectifier voltage often exceeds 15v and you certainly don't power down your graph to run the motor. If minn Kotas were catching fire because a disconnect was not used when charging there would be a lot of burnt up boats including mine.</p><p></p><p>Your two trolling motor batteries will be connected in series to make 24v, but as stated above each battery will receive it's own lead from the smart charger. No need to disconnect anything to charge.</p><p></p><p>As with all marine electronics, use waterproof connections if possible and marine grade wire.</p></blockquote><p></p>
[QUOTE="Slappy, post: 342723, member: 7608"] Whether receptacle or direct wire, make sure to use correct wire gauge for your run length according to the chart on page 21 of the minn kota manual. Don't just wire into an existing receptacle or bus board without knowing the wire supply is good. [url]https://minnkotamotors.johnsonoutdoors.com/sites/johnsonoutdoors-store/files/assets/misc/MI/M/MIN_productmanual_Terrova-BT-EN/MIN_productmanual_Terrova-BT-EN.pdf[/url] Also follow the manual for wire gauge and splice location on the charger leads. Minn Kota has a $50 rebate offer right now. Others might too. I never disconnect for charging because anything designed to use 12v DC is or should be designed to handle at least a few volts higher (and proportionally so for 24/36v). I can't find a spec for minn Kota but Lowrance graphs allow for up to 17v max. Smart chargers typically put out less than 15v, so I don't hesitate to use my graph in the garage even if it's charging. Motor rectifier voltage often exceeds 15v and you certainly don't power down your graph to run the motor. If minn Kotas were catching fire because a disconnect was not used when charging there would be a lot of burnt up boats including mine. Your two trolling motor batteries will be connected in series to make 24v, but as stated above each battery will receive it's own lead from the smart charger. No need to disconnect anything to charge. As with all marine electronics, use waterproof connections if possible and marine grade wire. [/QUOTE]
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