CTEK D250SA - Two leisure batteries?
- Thread starter kn0bby
- Start date
yes if you like . . .
they need to be connected in parallel.
and be same battery chemistry and size. (ie AGM - AGM)
its best to have them perfectly matched,
so 2x new same make, model, size, batteries.
the D250SA max output is 20A
.
...
...
they need to be connected in parallel.
and be same battery chemistry and size. (ie AGM - AGM)
its best to have them perfectly matched,
so 2x new same make, model, size, batteries.
the D250SA max output is 20A
.
...
...
Great response! Fantastic detail. Cheers.
Spent some time looking last night and couldn’t see.
Doesn’t look like it’s going to be an option for me. I’ve only have room for one battery to be permanently fixed in place. I use another leisure battery in a portable battery box for my trailer. It would fit perfectly in front of the drivers seat while away. Was going to use an Anderson connector to connect it into the system when needed.
Connecting in series would have been simple. Not too sure about parallel with an external connection.
Trailer in action..
Spent some time looking last night and couldn’t see.
Doesn’t look like it’s going to be an option for me. I’ve only have room for one battery to be permanently fixed in place. I use another leisure battery in a portable battery box for my trailer. It would fit perfectly in front of the drivers seat while away. Was going to use an Anderson connector to connect it into the system when needed.
Connecting in series would have been simple. Not too sure about parallel with an external connection.
Trailer in action..
Last edited:
you kinda could join them together . (as you said) ( in a temporary configuration)
provided they are same Ah and chemistry etc . . .
but what will happen is when you plug the second one in . . . .
if its a lower voltage than battery #one, battery #one will drain itself into battery #two as they will try to equalise them selves.
so you could end up with two half flat batteries . . . from one full & one empty
plus it will take twice as long to charge !!
cable distance and quality of the link between the two will play a part.
as will the Anderson connector, that will start to get warm above 40A.
*************
what your suggesting is roughly the same as connecting jump leads to connect your battery box to the Aux battery...
yes possible, but proceed with caution.
and remember the ctek is 20A charge max (5hrs to recharge a 100A battery) (10hrs to charge 2x100a batteries)
************
To join your battery box to the existing, get this type of thing. - fit this to the van aux battery. then connect ur battery box in when you need it.
just remember the points above, and keep an eye out for any heat build up in the cable or connector if the battery is low. - just unplug a lets cool off.
one the batteries have equalised voltage it will be fine.
add at 50A MIDI fuse to it.
.
with some of these . .
and some of this . . . . .
provided they are same Ah and chemistry etc . . .
but what will happen is when you plug the second one in . . . .
if its a lower voltage than battery #one, battery #one will drain itself into battery #two as they will try to equalise them selves.
so you could end up with two half flat batteries . . . from one full & one empty
plus it will take twice as long to charge !!
cable distance and quality of the link between the two will play a part.
as will the Anderson connector, that will start to get warm above 40A.
*************
what your suggesting is roughly the same as connecting jump leads to connect your battery box to the Aux battery...
yes possible, but proceed with caution.
and remember the ctek is 20A charge max (5hrs to recharge a 100A battery) (10hrs to charge 2x100a batteries)
************
To join your battery box to the existing, get this type of thing. - fit this to the van aux battery. then connect ur battery box in when you need it.
just remember the points above, and keep an eye out for any heat build up in the cable or connector if the battery is low. - just unplug a lets cool off.
one the batteries have equalised voltage it will be fine.
ANDERSON CONNECTOR 1m SB50 POWER 6mm TERMINALS VARLEY RED TOP BATTERY BOOST | eBay
Specifically designed for varley red top type batteries, but can be used on a range of applications. Torberry Connectors has been the main UK Anderson Power Products© distributor for nearly 50 years.
rover.ebay.com
add at 50A MIDI fuse to it.
.
with some of these . .
65/130x Copper Tube Terminals Battery Welding Cable Lug Ring Crimp Connector Kit | eBay
Sub-Type:Crimp Connectors. Material:Tin Plated Copper. Made of high quality pure copper material, good conductivity.
rover.ebay.com
and some of this . . . . .
there are other options . . .
like a second dc-dc charger,
battery combiner,
etc etc
but all cost more than the simple cable solution above.
like a second dc-dc charger,
battery combiner,
etc etc
but all cost more than the simple cable solution above.
more info.
.
jts12volt.com.au
.
How to wire up a Dual Battery for a Toyota Hilux - JTS12volt
The team at JTS have created cable kit for the Toyota Hilux.
jts12volt.com.au
maybe look ay adding a battery monitor to each battery . . . .
like a BM2 . . .
www.t6forum.com
.
like a BM2 . . .
Battery Monitoring -- How I Done It --
Battery Monitoring -- How I Done It -- Part #1 Battery monitoring is a very important part of your 12v system . . . . whether its just the vans starter battery or your leisure setup keeping an eye on the power in your battery bank will keep you from breaking down and make sure your weekends...
.
have a look at this link
www.t6forum.com
[Guide] DC-DC Charger (for leisure battery) -- How I Done It --
Not DC-DC exactly . . . but it looks like this MPPT will: reverse charge the starter battery @1A, run lithium, and have LTD ! ***************************** The Voltronic DUO - https://amzn.to/2Gvj3xH "The MPP-series controllers feature a second output so that some of the solar power can...
Thanks for all the advice..
Thought the batteries where the same size but double checked tonight.. The one in the van is 110ah AGM and the battery box is an 85ah AGM.. Doesn't sound like a wise option to mix them.
Ordered a BMV-712 to keep a closer eye on how much power I am using..
Thought the batteries where the same size but double checked tonight.. The one in the van is 110ah AGM and the battery box is an 85ah AGM.. Doesn't sound like a wise option to mix them.
Ordered a BMV-712 to keep a closer eye on how much power I am using..
At least they are Both AGM... stats good... just capacity is a bit off...
Maybe give it a go once you fitted your BMV.
I've done the same when camping and a flat 2ndbattery... I meeted out a 45A flow to the flat battery..... so you need proper decent fat cable.
Maybe give it a go once you fitted your BMV.
I've done the same when camping and a flat 2ndbattery... I meeted out a 45A flow to the flat battery..... so you need proper decent fat cable.
Similar threads
