DC to AC inverter to power a battery charger

[gran398]

Ok, here's a plan - and I've done this - most SUVs and trucks today have a 12 volt cigarette lighter outlet somewhere in the back of the vehicle.  Cut a 14 gauge, 2 conductor cord long enough to go from the tow vehicle to the cigarette lighter outlet on the boat.  Put a male plug on both ends of the cord and plug it into the tow vehicle and the boat.  Use bungees or rubber bands to secure the cord along the way.  Make sure the battery switch on the boat is "on" and the tow vehicle will charge the boat as you drive.  

The inverter to battery charger idea will work, but you are going from 12VDC to 120VAC and then back to 12VDC - each step will have losses.  Just go 12VDC to 12VDC and it will work better.  

Regarding the Harbor Freight 900W generator - it's not very noisy, and it would work fine to put it in the boat and let it run while you drove down the road to charge the batteries.  Just lash it down somewhere and make sure the exhaust points toward an open area so it does not damage any plastic or fiberglass...

Same thinking.... but better engineering!

[wingtime]

That just a longer version of the cigarette lighter jumper cable deal they sell in those cheapie roadside tools kits and stuff...     I like the redneck inverter idea... convert 12 volts DC to 120 Volts AC then convert it back to 12 volts DC to charge the battery!  LOL!   As mentioned already use the 12V battery charge source in your 7 pin plug.  That is used for just that.  Providing charging power for RVs or to charge a break away automatic brake battery.  Actually that's not a bad idea at all...  Charging your batteries on the way to the ramp.