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Small Powerwall in Germany
#21
IronSky . Sounds fair but still they look to be a bit long Smile But you save your self cutting them if not hehe
Goood work
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#22
Update: BMS

The Bms is here and now has to be wired.

Cable madness:
[Image: cHsP7Ql.jpg]
with smoke detector !!

[Image: nTAvvZS.jpg]

[Image: 26EjYXD.jpg]

After 1 hour everything was wired correctly

[Image: FOokhe8.jpg]

[Image: BVJSQyU.jpg]

it also flashes nice Big Grin
[Image: EgLdw5T.jpg]


The temperature sensors still need to be extended.

[Image: 0HlKHOM.png]

I hope the pictures are not too big. 


The BMS is only there for safety. It cost 70€. The balancing is too weak with the part.  Only 55mA. 




for the balancing I will take the parts of Owitte later.With Led Indicator 1S Battery Equalizer Single Cell Li-ion LiFePO4 LTO NCM Polymer 18650 DIY Active BMS Battery Balancer

14*16,90€=236,60€ Balancer
  1*70,66€=  70,66€ BMS
= 307,26€
costs half of the Batrium.

Mfg   IronSky
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#23
It is a start... But you are missing out on 2 things, a decent state of charge meter (200$) and logging... (and more)
Your bms is cheap, that is a good thing, but if you are thinking to add those 1S balancers, and a Soc meter ( you gonne want it soner or later ) the costs is going to be very close at the Batrium level...
Think twice Smile

Btw the fire detector is a good idea, gonne get those also. Big Grin
___________________________________
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#24
(01-24-2018, 10:53 PM)wim Wrote: It is a start... But you are missing out on 2 things, a decent state of charge meter (200$) and logging... (and more)
Your bms is cheap, that is a good thing, but if you are thinking to add those 1S balancers, and a Soc meter ( you gonne want it soner or later ) the costs is going to be very close at the Batrium level...
Think twice Smile

Btw the fire detector is a good idea, gonne get those also. Big Grin

Charge state measuring, charging current, consumption current, and log file in an Excel spreadsheet is all there.

Here is a picture of a test run with a test battery :
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#25
Network cables are great for other things other than networks Big Grin
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#26
How does charging work with those BMS? Do you have to feed it exactly 58.8v, or does it regulate itself?

Those Chinese sellers are never quite clear about the charge function.
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#27
Good work. Though there are a couple of things missing that you dont get with your setup. You have for instance no way of knowing if any of the cells is self discharging or have issues. Since those 1s balancers have no feed back one of the most important things are left out Smile

Then you have all extra features but those can be left out in the equation since they are mostly extras like controlling fans or anything outside the box. Or even controlling the charger directly so you get a proper charge.
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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#28
Update:

Building the solar panels on a sandstone roof. Unfortunately, there are no suitable holders, so improvising Tongue

 

after a few days it was done.



New grounding installed due to lightning protection.




Lightning protection fuses.


two new inverters TS-400 and TS-1000 48V.



BMS safely installed in a box.



New wiring.



Now everything is complete, only the charge controller is too small Angry



Mfg

IronSky
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#29
Nice work. How's the BMS doing? Can it keep up when you give the battery a full charge?
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#30
(05-01-2018, 11:15 PM)DK100 Wrote: Nice work. How's the BMS doing? Can it keep up when you give the battery a full charge?

everything is going well so far. The BMS can handle a charging current of up to 100A.

[Image: bubyca1.jpg]

mfg
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