Buy made modules

Hardware diyBMS
1

I’m looking at building myself a powerwall.
A must is off course a BMS.
Most of the powerwall community is looking at the Batrium BMS.
But I cann’t wrap my head around the idea of building the powerwall with salvaged batteries and then spent 800-1000euro on the BMS.

I came across this project and have been reading/watching youtube movies all week.
It seems everything I need from a BMS.

Now I was wondering if I can somewhere buy soldered modules.
Don’t understand me wrong, I have no problem with soldering some components.
I’m a very regular Aliexpress buyer (on pause for the moment to see there response to the new EU rules)
But I hate waiting impatiently for different components.

So where can I buy ready made modules (battery modules en controller (with ESP32)). Preferable in the EU.
I think I’m not the only one with this demand. (maybe the illegal Ebay shop is proof of this).

Many thanks, and keep up the magnificent work.

Xavier

2

Welcome Xavier, you are at the right place here see DIYBMS V4.40 x8 Modules (KIT) - Shop | OpenEnergyMonitor

3

I saw those !
But without controller I’m nothing.
And 8 is a really odd number, no ?

4

i got a 15kw powerwall i bought a good chinese bms to be my main safety then built diybms for monitoring and general interest.If the max amps the bms is going to see is say 50amps buy a bms at least double the rating as this.I got a programable one that you can set about 50 parameters and bluetooth comms for under£100.So far is has as i type been running for 463 days 13hrs 2mins so its very reliable.

5

8 is a nice number because it meets the needs of LiPo and LiPe 24vdc(you have a wonderful spare board for LiPo). My recommendation would be to try and connect with other folks that are planning an order and bulk buying/buying their extras. I am in the USA but noticed that it is hardly any extra to order 50 than the 14 I need and I have to order minimum of 5 controller boards so I figure I will post around on forums like this to see if there are others who want to team up.

I know Stuart is pretty set on this being a DIY product which I think we can all agree with but it does come with the tradoff of not having an always stocked store. If you ask he might know when/if he will be stocking the new controller boards on OpenEnergyMonitor. I imagine you will always have to buy the ESP32 separately but there are local/fast shipping stores for that most places. Best of luck :slight_smile:

6

What about the controller do you have them?

7

@Xtlife sorry I am not a seller. You have to ask @stuart

8

I’m struggling like the rest of the world with chip shortages, so finding it difficult to get stock to put in the shop.

9

:weary::weary: thanks guys, excellent work Stuart keep up the good work