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Re: Need to be able to charge Boat battery from truck...... How?
It is not that it will kill the alternator, it is that the charging voltage is too low to recover a weak battery back to full or near full charge. Batteries that get only 13.2-13.3 volt charge will not live as long as they should nor power devices as long as they should. It takes 13.9-14.0 or even a little more to bring it full charge. When charging from the trailer plug you will have voltage drop. It will charge the battery but not to a full charge.
The charger linked to up the thread is a charger that is electronic and can take lower voltage and increase it up to 13.9-14.0 V needed to get full charge. It will not be a fast charge using that charge but it will get battery up to full charge.
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Don't tell my cattle I got leather seats!
2006 F450 CC Hauler bed 4x2 6.0 L Pstroke/Torqshift, Lariat, 4.30 r/a.
2006 F350 Lariat CC Dually 4X2, 6.0 TQShift 4.10 LS, STOCK.
36 feet on the floor Elite/Outlaw LQ horse trailer.
36 foot double tandem axle flatbed trailer.
36 foot Sooner 6 horse large dressing/ mid tack.
15 horses with good balance from being hauled behind a P'stroke.
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