12v only - Page 2

31-03-2009, 19:15

Forget the first link
look here

http://www.x-eng.co.uk/X-Charge.asp

much cheaper

Deleted account DD · 31-03-2009, 19:15

Thanks Steve. How about the other way, if an ignition switched relay is in place surely the liesure battery will contribute to cranking the engine which cant be good !!!!!!!!!!!!

zippy656 · 31-03-2009, 19:16

thats good then..

Terranosaurus · 31-03-2009, 19:16

Quote:

Originally Posted by ssteve

the batterys will only take the charge they need irrespective of capacity
ssteve

Like the man says.

Only need to be matched batteries if you are going to leave them connected whilst not charging as the better one may then discharge through the lesser one but with a split charge no problem at all.

Deleted account DD · 31-03-2009, 19:18

Not a problem T, the relay will "disconnect" them either ignition or manual ly switched

on my set up...hopefully

zippy656 · 31-03-2009, 19:18

Quote:

Originally Posted by zippy656

thats good then..

thats good then.

Deleted account DD · 31-03-2009, 19:18

Quote:

Originally Posted by poppypiesdad

Forget the first link
look here

http://www.x-eng.co.uk/X-Charge.asp

much cheaper

Thanks

hadnt seen that one

Deleted account DD · 31-03-2009, 19:26

and looking at their instructions the penny has dropped, the 12v bulb lit

I've been missing the blindingly obvious.

To trigger the relay the feed or trigger voltage is taken from the back of the alternator. ie theres only 12v there once its running so the leisure battery doesnt "join in" until theres juice available for it irrelevant of the current drawn during cranking over/starting ............

Maplins tomorrow...........................

(RIP) PLANK · 31-03-2009, 19:28

to avoid all the potential 'issues' both real and products of our own anxiety, I use the smart com relay! it trakes away all your potential issues regarding charging! and they work very well for around £13 I think cant be bad.

http://www.towsure.com/product/2973-...lay_Wiring_Kit

you can also get a plastic battery mounting box and the quick release terminals in the smae place

but to be honest for a weekend you normal leisure battery should be more than enough!

Deleted account DD · 31-03-2009, 19:33

Thanks Plank, that looks good

Youre right we would probably survive for one weekend on one battery but the realisation that theres CL sites for £4 a night which we prefer , near to "grockles" sites that are £20+ a night in an area we love

I can feel a loonnnggg stay coming on

Terranosaurus · 31-03-2009, 19:37

Quote:

Originally Posted by daved

and looking at their instructions the penny has dropped, the 12v bulb lit

I've been missing the blindingly obvious.

To trigger the relay the feed or trigger voltage is taken from the back of the alternator. ie theres only 12v there once its running so the leisure battery doesnt "join in" until theres juice available for it irrelevant of the current drawn during cranking over/starting ............

Maplins tomorrow...........................

But as soon as you turn the ignition on there is voltage at the alternator. Alternators are not self starting they require exciting. The good news is though that as you crank the engine over the voltage drop should be sufficient to drop the relay so you won't pull big currents under cranking - that said I have found that if I flatten the primary batery on my van that it blows the split charge fuse when I try to start it - presumably it is pulling from the secondary battery.

On the Terrano I have 2 batteries but they are linked using a big relay 180A so that I can run high currents in either direction but that is a totally different set up. The installation is temporary at the moment I am awaiting the trial model of a new high current split charge relay that I will be testing.

Terranosaurus · 31-03-2009, 19:40

Quote:

Originally Posted by poppypiesdad

Forget the first link
look here

http://www.x-eng.co.uk/X-Charge.asp

much cheaper

Much cheaper but just a relay not voltage sensing - you're paying a lot of money with X-eng for (anything) a few bits of wire that attach to te relay they will sell you separately.

(RIP) PLANK · 31-03-2009, 19:51

or just take a fully charged spare battery with you and a battery charger, when you frst one is flat, throw your self on the mercy of the site owners for a recharge, job done

Deleted account DD · 31-03-2009, 20:34

I don't know if you were joking Plank but that had crossed my mind

I'm going to pursue this 12v business it'll keep me out of a certain amount of bother

ssteve · 31-03-2009, 21:00

Quote:

Originally Posted by zippy656

thats good then.

meaning?????
ssteve

31-03-2009, 19:15	#16
poppypiesdad Guest Posts: n/a	Forget the first link look here http://www.x-eng.co.uk/X-Charge.asp much cheaper

31-03-2009, 19:15	#17
Deleted account DD Senior Member Join Date: Sep 2008 Posts: 4,705	Thanks Steve. How about the other way, if an ignition switched relay is in place surely the liesure battery will contribute to cranking the engine which cant be good !!!!!!!!!!!!

31-03-2009, 19:16	#18
zippy656 Senior Member Join Date: Aug 2008 Location: Devizes Wiltshire Vehicle: Nissan Note Ntec 1.5 Posts: 14,138	thats good then..

31-03-2009, 19:18	#20
Deleted account DD Senior Member Join Date: Sep 2008 Posts: 4,705	Not a problem T, the relay will "disconnect" them either ignition or manual ly switched on my set up...hopefully

31-03-2009, 19:26	#23
Deleted account DD Senior Member Join Date: Sep 2008 Posts: 4,705	and looking at their instructions the penny has dropped, the 12v bulb lit I've been missing the blindingly obvious. To trigger the relay the feed or trigger voltage is taken from the back of the alternator. ie theres only 12v there once its running so the leisure battery doesnt "join in" until theres juice available for it irrelevant of the current drawn during cranking over/starting ............ Maplins tomorrow...........................

31-03-2009, 19:28	#24
(RIP) PLANK Senior Member Join Date: Mar 2006 Location: Central England, in the Heart of the Black Country Vehicle: T2 2004 TDI SE LWB Posts: 7,740	to avoid all the potential 'issues' both real and products of our own anxiety, I use the smart com relay! it trakes away all your potential issues regarding charging! and they work very well for around £13 I think cant be bad. http://www.towsure.com/product/2973-...lay_Wiring_Kit you can also get a plastic battery mounting box and the quick release terminals in the smae place but to be honest for a weekend you normal leisure battery should be more than enough!

31-03-2009, 19:33	#25
Deleted account DD Senior Member Join Date: Sep 2008 Posts: 4,705	Thanks Plank, that looks good Youre right we would probably survive for one weekend on one battery but the realisation that theres CL sites for £4 a night which we prefer , near to "grockles" sites that are £20+ a night in an area we love I can feel a loonnnggg stay coming on

31-03-2009, 19:51	#28
(RIP) PLANK Senior Member Join Date: Mar 2006 Location: Central England, in the Heart of the Black Country Vehicle: T2 2004 TDI SE LWB Posts: 7,740	or just take a fully charged spare battery with you and a battery charger, when you frst one is flat, throw your self on the mercy of the site owners for a recharge, job done

31-03-2009, 20:34	#29
Deleted account DD Senior Member Join Date: Sep 2008 Posts: 4,705	I don't know if you were joking Plank but that had crossed my mind I'm going to pursue this 12v business it'll keep me out of a certain amount of bother