Minn Kota
On-Board Trolling Motor Alternator Charger, Triple Bank - Minn Kota
Price: $186.75
Part # 1821033
2nd Day Air for $2.99 More Eligible
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With a low-profile enclosure and a waterproof, corrosion-resistant design, our DC Alternator Chargers use current from your boat's alternator to re-charge trolling batteries when the main engine is running. Master cutoff switch turns charging off while the engine isn't in use. Experience effortless, accurate charging with up to 30 amps of total output. * 3 charging banks * 10 amps per bank * 30 amps total output * Size: 14-1/2" length x 7-1/4" width x 3-1/2" height * Weight: 8.5 lbs * Alternator charging design uses current from boat's alternator to re-charge trolling batteries when main engine is running * Charge-on-the-fly circuitry puts additional juice back in your trolling batteries on runs between fishing spots, and they turn off when the engine stops * LED indicators display power-on, charging and check connection * Waterproof, shock and vibration-resistant design delivers exceptional durability in harsh, marsh environments * Engineered with advanced corrosion protection to withstand the destructive effects of saltwater * For use with 12 volt systems with 12V / 6-cell batteries that are flooded/wet cell, maintenance free or starved electrolyte (AGM) only * Includes one 6-foot fused input cable and three 6-foot fused output cable
How can i connect it to a nissan 18hp 4 stroke motor?
You hook it to the alternator (stator) of your motor. It must meet a minimum input, however, and that is a 35 amp minimum. Otherwise this will not work for you.

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