You should make sure that both batteries get a maintenance charge - ideally you have a decent multi stage charger on your EHU already for the leisure battery so just leave it hooked up - starter battery you can either fit something like the AMT-12 to trickle it from the maintained leisure...
I’ve never been too sure of the effectiveness of my Ablemail AMT12-2 either. It has been back for repair once as it was not charging. The BM2 does occasionally show a 0.03v charging blip but it does not keep my starter at a constant voltage when I’m not using the van and allows the stater to...
...works for you longer term in a bit.
Some mount a quick connect under the bonnet to make hook up easy, others fit something like the Ablemail AMT12-2 trickle charger as a more fit and forget (so long as you have your leisure battery maintained from EHU/Solar)
If you do mount a quick connect...
My Starter battery was replaced by the garage I bought the Van from but I discovered the muppets did not code the battery, so I did it. I like the concept of the AMC so will get one and see what happens. The Leisure Battery needs to earn its keep in the off season:)
That’s more or less what mine shows. I assumed that by setting the AMT12 to “smart alternator” it didn’t fully charge the starter battery.
This is mine just now
1. Personally, I would connect my solar to the LB side of the DC-DC & fit something like an Ablemail AMt-12 to keep the SB topped up. Plenty of folk use this method & it works well. Fitting the solar to the SB side might fool the DC-DC into thinking that the engine is running (Depending on...
IIRC, when I had the Sterling unit, you had to be pretty smart to press both buttons at the same time, it took a couple of goes to press them both simultaneously.
Sorry about the (non) English of my last post. Posted without reading it!
Do you have some sort of shunt for your BM2? How does it know what flows in and out of it?
Looks like a nice setup.
So what I would do.. would be to add in a Abelmail AMT12-2.
I've got one on both vans now and it works perfectly..... (I've also got the 230ah lithium, and 50A DC-DC etc etc on both vans.)
I've also added in the Abelmail Bluetooth adapter to twerk the AMT settings...
Nice one, thank you. The van is a daily driver so the only time it doesn't get driven is the weekends basically. Should have said, the panel is one of the suitcase ones so it's not permanently connected.
I like the idea of having all the data in one app and, as I said, I do trust the Victron...
Installed a AMT12-2 Trickle Charger between the Starter Battery and Leisure Battery.
Re- instated my newly sprayed (Gloss Black) overhead lighting unit.
I'd agree with the comments so far.
With charge rate I'd keep the Orion XS around 30A for general use, it's kinder on the battery, charger and keeps the heat down. You can always bump it up to the full 50A for a the week or two you're off grid and really drawing on the battery.
With the...
Good suggestion with the AMT12-2 @Dellmassive - Easily installed this tiny little thing today, (Hid it under the drivers seat with my Renogy 170Ah Lifepo4 and Victron 12-12/30 DC-DC charger.)
Waiting on the BM2 to come tomorrow, but once I managed to set the thing up for Smart...
Chris
Points in turn:
Don’t worry about the SB for now if AMT is keeping it going.
DC-DC output cable should be fused at LB end. Doesn’t need a fuse at Orion end. See the Victron instructions for a diagram.
Thicker positive cable to rear will always be better voltage drop wise. Seem to...
My relationship with the Ablemail AMT-12 was off to a rocky start as it would only charge with my starter battery when the lithium leisure bank was above 13.5V and the starter under 12.4V. This is well discussed by @Dellmassive on the following topic - BM2 update
(To be fair this was detailed...
sweet . .
you know we all like pictures . . .
so when you get a chance, post some.
of the AMT12-2 and BM2 etc etc ...
also do a few pics of your seat base build over here:
https://www.t6forum.com/threads/seat-base-electric-ehu-solar-install-how-we-done-it.25368/
.
...electrics like a ferret and will write a comprehensive report.
Main things as I understand.
-Starter battery shagged (I knew this, as AMT12-2 has been propping up).
-increased size of positive cable to dc to dc (I used the original installed one with an inline midi fuse when I put lifepo...
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