[Guide] Battery Maintainer (for Starter battery) -- How I Done It --
- Thread starter Dellmassive
- Start date
Hi all, I’ve just fallen foul of the no reverse charge from Redarc and solar . Van is dead.
I like the idea of the ablemail trickle charger or the battery master. But is it possible to fit alongside the Redarc whilst using it as a solar charger or is it for use with separate DCDC solar controller eg require a more major re-jig of the setup I’ve just completed.
Thanks for any help!
Neil
I like the idea of the ablemail trickle charger or the battery master. But is it possible to fit alongside the Redarc whilst using it as a solar charger or is it for use with separate DCDC solar controller eg require a more major re-jig of the setup I’ve just completed.
Thanks for any help!
Neil
you can use one 240v charger to charge both batteries . . . as seen here: https://www.t6forum.com/threads/battery-chargers-how-i-did-it.10812/post-349602
and here: https://www.t6forum.com/threads/cha...re-batteries-with-same-charger-victron.24317/
if you plan on going for Ablemail AMT12-2 then it sits alongside the DC-DC charger.
it relies on the fact that the Leisure/AUX battery is being charged by either Solar or EHU and will effectively "back-charge" the Starter battery - so if you have some Solar or EHU it will work fine . .
the AMT12-2 wires alongside the DC-DC like this . . just the 3 wires. (starter batt, aux batt + Ground)
you just join in the feeds right next to the DC-DC charger.
this shows the setup.
this other diagram is the same, it just shows the seperate Solar cable that feeds a DC-DC (redarc in your case)
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more info here:
AMT12-2 12V 2AMP Trickle Charger - Battery Maintainer - Battery Saver | eBay
Find many great new & used options and get the best deals for AMT12-2 12V 2AMP Trickle Charger - Battery Maintainer - Battery Saver at the best online prices at eBay! Free delivery for many products!
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That looks great. Thanks for the excellent reply. Was hoping it would be possible to add this to my set up rather than change everything. I will go and order one now.
so I can think about where I should put it, I’m thinking that I can connect the the leisure battery and positive feed from the starter battery that come through under drivers seat.Does that sound ok? Do I need acces to this device long term to tweak etc or is it connect up and it’s all good?
I may order a couple of bm2 as well so I can keep an eye.
thanks for the help
Neil
so I can think about where I should put it, I’m thinking that I can connect the the leisure battery and positive feed from the starter battery that come through under drivers seat.Does that sound ok? Do I need acces to this device long term to tweak etc or is it connect up and it’s all good?
I may order a couple of bm2 as well so I can keep an eye.
thanks for the help
Neil
post a few pics of your Redarc and setup and well have a look.
are we talking about this one? : NOCO GENIUS10UK, 10-Amp
10A is about the max i would use on the 12v socket port as it will start to get warm/hot, at that rate and above when left connected for long durations.
This is due to the small surface area of the connection.
i think the port is fused at 15A MAX ( i need to double check)
edit: yes mine was fused at 15A (Factory leisure battery, 15A under bench feeds top 12v outlet socket) https://www.t6forum.com/threads/12v-aux-feed-5xusb-charging-from-aux-battery-todays-install.7079/
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NOCO do a nice range of quick connect too . . . have a look at these:
NOCO GC002 X-Connect M6 Eyelet Terminal Accessory For NOCO Genius Smart Battery Chargers
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NOCO GC004 X-Connect 10-Foot (3-Meters) Extension Cable Accessory For NOCO Genius Smart Battery Chargers: Amazon.co.uk: Car & Motorbike
Buy NOCO GC004 X-Connect 10-Foot (3-Meters) Extension Cable Accessory For NOCO Genius Smart Battery Chargers at Amazon UK. Free delivery on eligible orders.
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NOCO GC004 X-Connect 10-Foot (3-Meters) Extension Cable Accessory For NOCO Genius Smart Battery Chargers
Yes that’s the one, it’s on at £75.00 so I bit the bullet and bought it before it jumps back up in price again.
I don’t have the factory leisure battery so will have a study of Loz’s fuse chart and see if I can find mine.
The reason I was/am going up in size is that I have a battery to battery charger (Sterling) and it kicks in when I put vehicle battery on charge and it then takes hours and hours to charge.
I don’t have the factory leisure battery so will have a study of Loz’s fuse chart and see if I can find mine.
The reason I was/am going up in size is that I have a battery to battery charger (Sterling) and it kicks in when I put vehicle battery on charge and it then takes hours and hours to charge.
jwheeler91
New Member
I've got a flat battery 
. I've just ordered one to go alongside my Abso DMT-1250 which has 200W solar attached. I'll update if it works
. I've just ordered one to go alongside my Abso DMT-1250 which has 200W solar attached. I'll update if it works
P
Phil_G
Guest
A standard BM2 bluetooth battery monitor permanently wired to a cig lighter plug is a very handy tool, just plug in when you need to monitor... 
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jwheeler91
New Member
Well i think it’s working well. I guess ill see if we ever run down either battery.
jwheeler91
New Member
I have a DIY LiFePo4 battery charged by an Abso DMT-1250 Solar & B2B charger.
I’ve just added the AMT12-2 and it is working perfectly so far. When the green led comes on, the voltage across the vehicle battery increases, so I think it’s working. I guess I’ll see if the vehicle battery every drains…
So far I am pleased.
I’ve just added the AMT12-2 and it is working perfectly so far. When the green led comes on, the voltage across the vehicle battery increases, so I think it’s working. I guess I’ll see if the vehicle battery every drains…
So far I am pleased.
jwheeler91
New Member
Thanks, probably a good idea
jwheeler91
New Member
While I haven’t picked up a monitor yet, i can confidently say the AMT12-2 is definitely working! Accidentally left my dash cam in parking mode for a week… but it’s still at full charge! Neat!
@Dellmassive I’ve just caught up with this thread, after finding that my DC charger not kicking in was a result of the LB being depleted. Good work on the research, will order one of those AMT’s
(quick question: with my DC-DC charger being voltage sensitive, will it kick in when the AMT sends charge back to the vehicle battery whilst the LB is being charged?)
(quick question: with my DC-DC charger being voltage sensitive, will it kick in when the AMT sends charge back to the vehicle battery whilst the LB is being charged?)
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