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Batrium WatchMon 5 and Leaf Cells
#1
Greetings,

I purchased the Batrium WM5 to use with my Leaf Cells, I am using it without the Batrium Leaf cellmons. Is there anything wrong with not using the cellmons from Batrium?

This is a great community and I have learned alot from all of you, thank you.
Batrium WM5

Leaf Batteries Gen 2
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#2
As I understand it - the WM5 is lighter-weight-balance system that doesn't use external mons. You wire the battery up to WM5 and it as 'mons' built-in. The limitation is that its only 14s (you can't expand beyond that) so you have to parallel any additional cells into a single 14s hookup.
BUT - please consult Batrium (and others) as the authority as I only have experience with WM4.
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#3
As last Said. Wm5 is a more light weight unit. Limited to what you can run
The Ultimate DIY Solar and build place
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#4
Thank you both for the replies.
I am happy with this BMS, just have regrets on its limited functionality, considering its price point. I think i will be looking at the DIYBMS v4 for any future projects. But it does the job on my leaf pack.
Batrium WM5

Leaf Batteries Gen 2
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#5
Leaf cells are super stable - you wont need large balance currents... So the WM5 should be fine?
hbpowerwall likes this post
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#6
Yes the WM5 will do fine, its works great.
Its limited functionality such as lack of native protection mechanisms bother me. I know i can add the expansion board and connect a shut trip get me closer to what i look for on a BMS but the price point makes it a one time purchase versus growing the ecosystem. i will keep it and find something else for future projects.
Batrium WM5

Leaf Batteries Gen 2
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#7
WatchMonPlus (WM5) can be expanded to have extra cell monitoring using the new MultiMon-MM8 module, it allows you to add more parallel banks of batteries as required. The MM8 is about to be launch in the coming weeks, just held up whilst we finalise the documentation. From testing on a few projects over the last 5 months we as very happy with its performance.

MultiMon MM8 product page
https://www.batrium.com/products/multimon-mm8

Draft Instructions
https://support.batrium.com/article/280-...m8-install

We believe that this will make the WM5 and MM8 the go to solution moving forward for a few reasons:
  • its cheaper
  • easier to commission 
  • allows the bypass resistors to be mounted away from the cells
  • temperature sensor can be placed where they suit the battery designer
  • at a glance SoC% display on the supervisor
  • same eco system of expansion functionality and software support
These reasons were requested from the community and why we listened and developed the product

hbpowerwall and clementhk like this post
www.batrium.com provider of battery management for lithium cells
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#8
Jaron: How many MM8 can you hook up to 1 WM5?

Is it limited to same amount of cell count as WM1 and 4 had ie 250 cells so that equals 16MM8?

Like for my Shelf type of build if I build another one i could potentially have 1 MM8 on each shelf
hbpowerwall likes this post
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#9
(02-06-2020, 08:58 AM)daromer Wrote: Jaron: How many MM8 can you hook up to 1 WM5? 

Is it limited to same amount of cell count as WM1 and 4 had ie 250 cells so that equals 16MM8?

Like for my Shelf type of build if I build another one i could potentially have 1 MM8 on each shelf

The Supervisor limit is 250 cells, allowing another 15 MultiMon but untested, thus far we the most we have added was 8 slave modules.
hbpowerwall and clementhk like this post
www.batrium.com provider of battery management for lithium cells
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#10
Ah cool. Smile
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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