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Old 09-07-2019, 16:48   #1
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Choosing a BMS for 8S (24V) prismatic LiFePO4 cells

Hi there,
I've been scratching my head trying to decide on which BMS I should get. I'm working with an 8S battery bank and would like to control up to 250A (750A peak), to feed a 6000W inverter. I've been looking at:

- Batrium
- 123 Smart BMS
- Orion Jr BMS
- REC Q BMS

They are a bit different from each other and I find it confusing to compare them. Has anyone had any experience with them?
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Old 09-07-2019, 22:56   #2
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Re: Choosing a BMS for 8S (24V) prismatic LiFePO4 cells

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Originally Posted by aybabtme View Post
Hi there,
I've been scratching my head trying to decide on which BMS I should get. I'm working with an 8S battery bank and would like to control up to 250A (750A peak), to feed a 6000W inverter. I've been looking at:

- Batrium
- 123 Smart BMS
- Orion Jr BMS
- REC Q BMS

They are a bit different from each other and I find it confusing to compare them. Has anyone had any experience with them?
Yes agreed. I have been mulling over the same question myself for some time.

Sorry I dont have the answer for you either. But I am also looking around the same size as you are talking about with 8S 24V, looking 400-600 AH range. So Im interested in what comes of your question.

IMNSHO its the 'trickiest' question as there just doesnt yet seem to be any clear proven winners.

The chargers are pretty straight forward, although still questions get asked these are relatively minor details. I have gone with Sterling Prochargers, Victron MPPTs and Open source Alt regs. I also have a BS ACR and Sterling B2B to charge my 12V Start batt. I also have a Victron BP220 'LVC'.

Ive got and setup these components in preparation for my LFP upgrade with my existing 'tired' FLA setup. So far it's all working quite well and I'm happy with the way it works. Of course its taken some time and effort to get to this point, and Im still not there yet.

Cells, always some discussion, but to me Sinopoly or CALB seem a reasonable bet with prices getting quite reasonable these days.

I have been leaning mostly towards the 'Smart BMS'. But I have to say the Batrium also looks quite compelling. Its newer on the scene. Although I have heard some possible user 'issues'? It remains to be seen how this will shake out. I guess this has contributed to delaying my decision.

Like you Im keen to hear some real world experience feed back.
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Old 15-07-2019, 01:22   #3
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Re: Choosing a BMS for 8S (24V) prismatic LiFePO4 cells

I attempted to get more information from Batrium, but their support person refused to provide any substantive information, pointing me to their paid consultation instead. I followed up and asked how they would compare their products to competitors, and support basically told me to do my own research. Which obviously I'm doing, but how am I supposed to take seriously a company who basically refuses to explain how they differentiate from their competitors. In my book, and since Batrium comes a bit off putting with their 3D printed setup, that leaves them out of the loop. The interaction was unpleasant and I wouldn't want to deal with that attitude if I have an urgent need.
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Old 15-07-2019, 09:58   #4
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Re: Choosing a BMS for 8S (24V) prismatic LiFePO4 cells

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Originally Posted by aybabtme View Post
I attempted to get more information from Batrium, but their support person refused to provide any substantive information, pointing me to their paid consultation instead. I followed up and asked how they would compare their products to competitors, and support basically told me to do my own research. Which obviously I'm doing, but how am I supposed to take seriously a company who basically refuses to explain how they differentiate from their competitors. In my book, and since Batrium comes a bit off putting with their 3D printed setup, that leaves them out of the loop. The interaction was unpleasant and I wouldn't want to deal with that attitude if I have an urgent need.

Wow, yes, that would take them off my list too.
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Old 15-07-2019, 13:57   #5
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Re: Choosing a BMS for 8S (24V) prismatic LiFePO4 cells

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Originally Posted by aybabtme View Post
I attempted to get more information from Batrium, but their support person refused to provide any substantive information, pointing me to their paid consultation instead. I followed up and asked how they would compare their products to competitors, and support basically told me to do my own research. Which obviously I'm doing, but how am I supposed to take seriously a company who basically refuses to explain how they differentiate from their competitors. In my book, and since Batrium comes a bit off putting with their 3D printed setup, that leaves them out of the loop. The interaction was unpleasant and I wouldn't want to deal with that attitude if I have an urgent need.
Yes disappointing to hear.
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Old 15-07-2019, 14:47   #6
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Re: Choosing a BMS for 8S (24V) prismatic LiFePO4 cells

On the other hand my discussion with REC has been fruitful. Still waiting to hear from Orion.
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