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Advice on better quality BMS
#1
Video 
Hi,

I’m pretty new the DIY powerwall scene and I need advice on a good quality BMS for my powerwall build. I’m buying a EAsun hybrid inverter and the battery voltage is 24v so I’m planing to build two 7s20p batteries from brand new panasonic 2900mah 10A 18650 cells. And to go with that I need a BMS , I’m looking for somerhing in the 50$ - 100$ price range. Batrium is too expensive.

Thanks in advance for your input
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#2
How much are you spending on the cells and inverter ?
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#3
(09-15-2018, 05:45 PM)Sean Wrote: How much are you spending on the cells and inverter ?

The cells are 728€ and the inverter is 350€
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#4
(09-15-2018, 06:56 PM)Marcus_swe Wrote:
(09-15-2018, 05:45 PM)Sean Wrote: How much are you spending on the cells and inverter ?

The cells are 728€ and the inverter is 350€

That's a fair sum to spend, you might want to consider spending a fair bit more on the BMS to protect your investment.
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#5
Do you have any 7s bms to recommend?
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#6
(09-15-2018, 07:55 PM)Marcus_swe Wrote: Do you have any 7s bms to recommend?

No, not in price range you mentioned.
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#7
Ok ? can give it to me anyway so I can evaluate it?
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#8
Batrium is what I run. I got 4 of em so Smile


The protection should be very important since thats what will save you in the end. There is BMS systems for 50-100USD but are they good enough? Do you know what functions and type of protection you want and or need?
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#9
Tack!

Do you know of any resellers in Sweden?
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#10
I got mine direct from batrium was delivered within the week via DHL 

if you really want to get your hands dirty a member on here had a DIY solution for BMS 
I did look at it and think for my 18650s will give it a go
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