T-Pain Is On A Boat: Re: [Electric Boats] Advice wanted Please

Sunday, February 3, 2013

Re: [Electric Boats] Advice wanted Please

Hi Oak,Carter,

Thanks for your replies, my van has two batteries, so I'm not sure what the voltage output would be at the cigarette lighter but as you say charging when running the engine. On the boat as you say I have no engine just a 12W solar panel,controller and two leisure batteries
If the voltage differences are the problem would an answer be to get a cheap inverter plugged into the DC socket to charge the Charger, (converting the DC current to AC(via the inverter) then back to DC)if that makes sense...

Or is it possible to get a DC to DC cable that does'nt allow reverse
charging.

Thanks
Innes.

--- In electricboats@yahoogroups.com, Carter Quillen wrote:
>
> That sounds like a good guess. I've experienced something similar with my 12V phone charger on a tired car battery. When the battery was low, the charger drained the phone battery.
>
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> ________________________________
> From: oak
> To: "electricboats@yahoogroups.com"
> Sent: Saturday, February 2, 2013 8:07 PM
> Subject: Re: [Electric Boats] Advice wanted Please
>
>
>
>
>
> Just a guess.... I'm assuming you have your car running when you're charging from the car - so the voltage from the car plug is probably ~14V. Likewise, I'm assuming your bot is NOT running (no alternator charging the battery) when you plug it into the boat - so the boat plug is probably 12-13V.
>
> The next guess is that the "charger" looks at the voltage on the plug. If it's over 13V, the charger can charge itself. If it's below that, it needs to charge whatever device it's plugged into.
>
> maybe?
>
>
> ________________________________
> From: Innes
> To: electricboats@yahoogroups.com
> Sent: Saturday, February 2, 2013 5:18 PM
> Subject: [Electric Boats] Advice wanted Please
>
>
> Hello All,
>
> I bought a digital jump starter/charger recently as it has a little
> inverter built in to it and I can charge my radio,phone from it and other things. My problem is I can't seem to charge it from the cigarette
> lighter on my boat. There is a DC input jack(4.5mm) and it charges up ok using the supplied Mains AC adaptor and it also charges ok from the cigarette lighter socket in my Van using a DC cable. There is also a little 3.5mm solar input jack and I bought a cable to try this instead, but no joy....what seems to happen is the read out on the charger says its charging but the voltage slowly drops! , it seems to be reverse charging.
> The batteries on my boat are trickle charged by a solar panel and the batteries were full today when I tested it.
>
> Any Advice?
>
> thanks
> Innes
> Shadow H22
>