Ctek 250se question.. small black earth

[T6DSGChris]

I have just fitted the ctek and she works a treat, sat there relooking at the instructions.. page 7 got me a little..

i have smart alternator in the new t6.. but im using my 110ah old leisure from my t5 conversion...

Small black wire.. i initially earthed..
Now.. i'm not convinced.. see attached pic..

standard not attached
Agm as most of you have and i'm debating... attached to earth
And lithium to +12v

theories please.. thanks

 

[andys]

You don't need to connect if it's not an AGM

 

[jimc91]

My understanding is it depends on what type of leisure battery you have, an agm connect the black lead to earth, a normal lead acid battery no connection, but I can see why there might be some confusion as the instructions are not that clear, if I’m wrong someone else will be along to put you right

 

[T6DSGChris]

I thought so but a colleague thought different.. even my missis reads it the same as me

thankyou hope everyone thinks same

Same size physically in agm is a 90ah.. thoughts on whats best.. im reusing a lot of wiring and my pod/install etc from my much loved t5 but i swapped due to needing an auto. Agms have the glass platelets etc? Cope better with more stress, charge faster etc? The 110 old skool is actually bigger than i should use on the ctek..
Im an ex techy thats in the land of old.. 15years off my spanners.

Ta for help

 

[jimc91]

If I had an old 110 ah lead acid battery I would use that until it was knackered then replace with an agm or lithium depending on finances. Who knows you could get a couple of years out of the old battery, I think you just need to ensure it’s vented and kept upright whereas an agm can go on it’s side

 

[T6DSGChris]

Yeah all put in yesterday and finished today when my cable crimpers landed from amazon
Pic was trial fitting bits.. will do finished pic tmora.. when i take seat back and and disconnect the small earth

ordered my 30amp fuses also as had 100a on old VSR system. (Not fitted by me)

thanks all for vibes, appreciated

 

[Dellmassive]

You don't need to connect if it's not an AGM

what he said . . . .

leave the wire disconnected . . . its used to tell the ctek what charging profile to use . . .

if you have a standard lead acid battery. - leave it disconnected.


when you swap out for an AGM - then connect to ground.

and if you go lithium - connect to +12v

 

[T6DSGChris]

Will take off and insulate it up, leave for future use

 

[Mud Digger]

Thanks so much you guys.... this is very useful information again.... what a site this is ... hoping to be fitting the B 2 B Ctech this coming weekend. as the weathers poor again. Was down in Seaford / Newhaven this weekend hoping for a bit of Fishing was a wash out

Fitted my AGM Battery and Victron mains charger last weekend Under the drivers seat, was tried and tested out this weekend. The blue - tooth function is very useful as the battery is out of sight.

really very pleased with the kit with all the cabling @travelvolts has sent me thanks again you guys

 

[Bigsidavies]

I’ve just installed a Leoch 110ah Powabloc GTP gel battery. Should I connect the black wire to earth? Is it the same charging profile as an AGM? Doesn’t say in the ctek instructions?

 

[Bigsidavies]

Think I’ve found the answer myself. The spec sheet for the battery says it needs 14.6v which puts it in the AGM profile of 14.4-14.7 so I’ll leave the black wire connected to earth. Panic over.