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Old 18 January 2003, 13:45   #1
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Battery Charging

Does anyone use the 12S socket (grey one) on their towing vehicle to charge the RIBís battery whilst towing to the launch site.

This works for caravans on the move so I donít see why it shouldnít work for boats Ė would save much embarrassment after launching.
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Old 19 January 2003, 10:54   #2
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So the answer must be No then......
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Old 19 January 2003, 13:11   #3
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Doesn't necessarily mean it's a bad idea, though .

I don't do this for two very good reasons:
1. Didn't have the 2nd socket installed with the tow bar, (as I'm not a caravanner).
2. My sib is maunal start - so no battery on board.

I guess that the only concern is that your vehicle electrics are up to the job - ie loom connection sufficient for charging the battery.
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Old 19 January 2003, 14:13   #4
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we have a 12s socket on one car at the moment (too lazy to put one on another) and it provides power through one pin to caravan fridge and another to the caravan battery - both only whilst on the move. When we go away one car takes the van and another a boat. Never bothered putting a connector in a boat although we have thought about it from time to time. When you wire the car end take the wire direct from the battery terminal but then thru a split charge relay wired to alternator so it only provides power when the voltage is high enough to charge the batteries otherwise you are likely to run the good battery down as the low battery draws charge from it. The fridges take a fair old wack and there have been cars that can't start when they get over the chanel cos the battery has flattened running the caravan fridge throughout the crossing cos the fridge has been wired straight to battery with no split charge relay. Relays/kits available thru caravan outlets or mail order thru towsure. 12s is handy for plugging searchlights etc into.
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Old 19 January 2003, 14:14   #5
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Not used a grey socket (never had a vehicle with one), but 20/25 years ago set up charging system from a landrover to the boat, needed diode cut outs and a switch for option, i.e. car or boat on charge, not both simultaneously. Mind you no alternators then, only dynamos.
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Old 19 January 2003, 14:16   #6
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Seems I was typing at the same time as Dave, doesn't look like alternators are any different to dynamos in this respect then !
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Old 19 January 2003, 14:37   #7
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Quote:
Originally posted by Phill
Mind you no alternators then, only dynamos.
Bl**dy hell, Phill, you must be older than Gods dog
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Old 19 January 2003, 15:04   #8
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Ribald

I always run the outboard on flush at home to test battery before leaving, also means that engine will start on the button at launch when you need it to because it is already slightly warm

better to find a flat battery ay home than on a slip way

always looks impressive as well that engine fires on the button when you see others trying to turn theirs over and over again sometimes struggling
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Old 19 January 2003, 15:59   #9
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Cheers folks

Thanks for the info - very useful.

My FWD has a 12S socket already fitted and wired (the previous owner towed a caravan).

The reason I was thinking of going down this route is because my RIB is not stored at home and there is no power available where it lives so a top-up charge en route to launching sounds like a good idea.

Looks like God had at least 2 dogs as I was also bought up on dynamos - good old E93A sit-up & beg.
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Old 19 January 2003, 16:06   #10
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Ribald

Never tried it but sounds like a good idea. I have an Old Range Rover to tow the boat about (wife does not want to use the other Jeep )
I'll try it and see how it goes
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