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Voltage configuration in batrium
#11
I would set the charger to stop at 4.0V. I would set batrium to bypass at 4.05 or equal. I would set critical off at 4.2V. 
Autolevel is good to have but it will not often be triggered depending on settings. 

Making sure batrium starts bypass att 4.05 ensures you have headroom towards before it goes critical high.
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#12
In my experience, fan cooling of your mons is vital... Don't skip over this part. A Mon can very quickly end up going into thermal shutdown and you can easily get a runaway cell if you are trying to hold back a high cell whilst waiting for the rest of your pack to come up.
Current system: 9.6kWh wet Nicad batteries, 16S1P Calb LiFePo4 210aH, Batrium WM4, Outback vfx3048 inverter, mx60 mppt controller, flexware 500 mounting hardware, 2.4kW solar array, 6kW lister diesel genset. MY'13 Vauxhall Ampera
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#13
I dont have any extra cooling and its not needed if you dimension the values correctly and make sure you can feedback the charger.

Example I have almost 200 mons in total... 200 fans? Smile
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#14
(10-18-2019, 10:08 AM)daromer Wrote: I dont have any extra cooling and its not needed if you dimension the values correctly and make sure you can feedback the charger.

Example I have almost 200 mons in total... 200 fans? Smile
Yep, but most people seem to be forgetting the 'feedback the charger' part...

AFAIK it's schneider, victron,  eltek or brusa that are supported as a 'remote' option for charger control. No built in support for PIP solar MPPT or Inverter/Charger...

Correct me if I'm wrong there Daniel.

My testing indicates that I need mon cooling in my setup at the moment... I had dropped my charge current right down to single digits and still wasn't able to keep a fresh cell in line whilst bringing the rest of the pack up... even with cooling and 1.94a of bypass.
Current system: 9.6kWh wet Nicad batteries, 16S1P Calb LiFePo4 210aH, Batrium WM4, Outback vfx3048 inverter, mx60 mppt controller, flexware 500 mounting hardware, 2.4kW solar array, 6kW lister diesel genset. MY'13 Vauxhall Ampera
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#15
I set my Bypass Temp Limit field to 55C and it definitely lowers the temp - you can see the affect on the main screen. I presume you can lower it further if your balancing needs are gentle and extend the life of the longmons. For me, I've only had to balance 6 days so far this year (when adding a new battery to the bank) so its not a large issue yet.
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#16
(10-18-2019, 02:40 PM)OffGridInTheCity Wrote: I set my Bypass Temp Limit field to 55C and it definitely lowers the temp - you can see the affect on the main screen.    I presume you can lower it further if your balancing needs are gentle and extend the life of the longmons.    For me, I've only had to balance 6 days so far this year (when adding a new battery to the bank) so its not a large issue yet.
I've just had to swap in a new (used) cell... I'm having a hard time holding it down whilst I bring the rest of the pack up so I'm charging to a lower absorption setpoint presently with a view to slowly increasing that over the coming days to try and get the pack up evenly. No idea if that will work or not...

I can get the pack up to around 3.41/cell with the new cell hovering around 3.45 - I try and push it any higher and the new cell starts heading right up the knee and I can't keep it down.
Current system: 9.6kWh wet Nicad batteries, 16S1P Calb LiFePo4 210aH, Batrium WM4, Outback vfx3048 inverter, mx60 mppt controller, flexware 500 mounting hardware, 2.4kW solar array, 6kW lister diesel genset. MY'13 Vauxhall Ampera
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#17
I leave it to go up to its max heat. No problem with Them so far.

But i also dont let the Charger Charge to high and the elevatef voltage is not a problem. My max voltage is set 4v so i have 0.2v of extras. IF it goes above batrium shutd down the Charger. This without feedback. You Will need to have Them decently balanced from start but then just run it.

Hugf it Will work just fine... I have done it many Times. It can take a week or so depending on size but in the end they are in balance again. If one cells get way higher add a 12v 100w car bulb in parallel doing initial balance and it Will Go faster
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#18
(10-18-2019, 02:59 PM)daromer Wrote: . If one cells get way higher add a 12v 100w car bulb in parallel doing initial balance and it Will Go faster
 I use my OPUS(s) to raise and lower individual packs.  Simply put a nickel strip across all 4 connectors with taped off cells to hold it, then hook the + and - to the pack and wa-la, you have a 4000mah charge/discharger  (4a * 3.7v ~ 15watts per OPUS).   Not as fast as 100w car bulb but you monitor the voltage on the OPUS to get the pack to match the other packs and you can charge if it goes too low.    This has helped me put a new 14s battery online in paralllel with the overall battery bank - and then, when things are close go to Auto Level balancing to tidy things up.
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#19
I'm expecting a full day of sunshine tomorrow and I expect we'll be starting the day around 55%SOC, I will try out a car bulb to keep the new cell in check
Current system: 9.6kWh wet Nicad batteries, 16S1P Calb LiFePo4 210aH, Batrium WM4, Outback vfx3048 inverter, mx60 mppt controller, flexware 500 mounting hardware, 2.4kW solar array, 6kW lister diesel genset. MY'13 Vauxhall Ampera
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#20
The car bulb approach is very simple. yes you need to look over it a bit but if you do your math you know if you should have it there for an hour or 20.
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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