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Batrium: Remote charge targets & Eltek 2000HE
#11
I have a WM4 with three flatpacks running, but I also had big problems in the beginning, nothing I did could solve the mystery with the canbus, but in the end it was a simple fix: I just pushed the buttons once on the WM4 and it instantly started to send and recieve canbus messages.
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#12
(10-03-2018, 07:17 PM)Filip Wrote: I have a WM4 with three flatpacks running, but I also had big problems in the beginning, nothing I did could solve the mystery with the canbus, but in the end it was a simple fix: I just pushed the buttons once on the WM4 and it instantly started to send and recieve canbus messages.

I did read your post initially when I was pondering, and dismissed it only because one button I beleive, is mode, the other is prog - in my view, neither of which should need to be used to "wake up" the bus, unless this is an odd undocumented feature you've discovered.

I tried it anyway, but no change.

Does yours reboot correctly, regaining correct control of the remote ?

(10-03-2018, 07:17 PM)Filip Wrote: I have a WM4 with three flatpacks running .......

I'm assuming you are setting the target current as /3 of what you want ? - so 20 amps target give 60 actual, or maybe you've worked out how to address them individually (which I doubt is possible)
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#13
When I had the problems the WM4 was so new that there where no documentation at all, so I knew nothing what the buttons were for, maybe there is some info about what the buttons are for now? If they are mode and prog, if you are in wrong mode, the canbus is off? I don´t know, I´m just guessing...

Yes, I set the target current to a third, I have three phases in my house so to even the load on the phases I use three Flatpacks.
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#14
I'd be interested in how you are utilising the Elteks. Also, are you happy to leave them running unattended relying on your settings to reduce current based on your set limits ?

I've just spent another hour factory resetting, another fresh install etc etc, and I now have some control over voltage and current - it's sat here at 15 amps 49.6v.

But, powering cycling the Eltek, doesn't retain its settings, so it ramps back up to 53.7v and 30A + - it does only after you've changed the remote targets.

Also, twice, whilst sat stable at the required settings it decided to revert back to its defaults, as above - hence my question, are you happily leaving it unattended ?

I'm not quite at the stage of fixing them with hammers, but they are edging their way to the shelf where my betamax and laserdisc players are sat.
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#15
I´m using the Flatpacks to charge my battery bank when I´m exporting solar power, this is controlled by a smart meter and a raspberry with some nodered "coding", I have relays controlled by the raspberry so each time my thresholds passes the relay switches, I´m doing this on the primary side of the Flatpacks so each time the Flatpack turns on the WM4 has to communicate with the Flatpacks. It works with no issues, only thing I have noticed is that if I set the current below 0,5A the Flatpacks take approx 5 seconds to ramp down from about 5-7amps, that is probably because they have "charged up" the capacitors, Its not a problem for me bacause I charge with higher current.

I have no problems leaving them unattended for a couple of days, but I have fuses between the Flatpacks and my battery bank so if communication fails and the pack voltage is below the Flatpacks no communication volt (53,7V) the fuses will trip, if the voltage is higher than that, then the Flatpacks won´t deliver any current at all. The fuses has never tripped.
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#16
Thanks Filip, well given the hassle I'm having with this BMS here and the trolling I'm getting from a mod via PM I think I'll park this BMS for a few months.
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#17
Sean, I got curious today and rebooted my system to see if the canbus restarted as it should, I have never rebooted the system since I got it working (since may if I remember correct) and as a complete surprise, the canbus failed, sometimes instantly, sometimes within three minutes.
I had big troubles to get it to work again but here is how I did it this time:
Disconnect wifi,
Set your charge targets using usb connection, disconnect usb from computer,
Reboot system using one push on "Prog" button,
Power up the Flatpack right after the prog button push
Let the WM4 and the Flatpack talk to each other without interference for at least 10 minutes,
Connect USB again, and Voila, canbus works again!

Hope this helps for you too, I think the communication between the computer and WM4 interferes the canbus when it is initializing.
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#18
I'll try that later.

The main issue with the Eltek not seeing any bus traffic is that it defaults, so very high current output, until it gets told what do.

That's not healthy for the battery.
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#19
If you charge the battery to 54V with another device then no current will be released from the Eltek if the canbus fails, I use that method as fail safe when testing.
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#20
What version of Powersuite are you using Filip ?

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