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Powerwall demo
#1
Hello Smile 

Thats my little "powerfloor" created for fun and some education Big Grin 

I decide to use a repack ICR18650-26F cells (112pcs) + ICR18650-26H (28pcs) in 7s20p

 
 

Charge controler is a Tracer 1210AN working with one 195Wp mono solar panel
230V inventer is a cheap 300W solution for truck 24V systems
Cables have a 6mm2, for balancing I order a 1s deligreen solution





Today is its first day of working Smile

Best regards Marcin Smile
Redpacket likes this post
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#2
little update Wink

I was add 28 cels to my packs
ICR18650-26H - 7pcs
LGDAS31865 - 21pcs
and also I have some laptop batterys Big Grin




rewraping LG's


growing Rolleyes
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#3
Looks good. Keep posting updates!
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#4
Parcel arrived Big Grin 

Another Tracer - 1206AN with temp. sensor


Today start working with my 2x 10W in series, very old china panels Big Grin


I planing to buy another solar panels and set it:
1210AN with 1x 330W panel
1206AN with 2x 195W panels in parallel

Meanwhile I finish capacity testing some laptop cels, now i'll give them some weeks to check self discharging  


Best regards Wink
Marcin
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#5
Hej Marcin Smile

Great job, how's the outcome and capacity ?
What did you use for fusing ?
Packs build:
7S1P 60Ah ~1.5kW SAMSUNG SDI prismatic cells - I'm looking for more info about them / PV if you know more Huh
7S84P 240Ah ~6.2kW from 588x cells LG MG1 2850mAh
Inverter - 3kW AIMS  pure sine
Solar - considering addding 220W with MPPT Make Sky Blue 30A
Set up for mobile gastronomy 2kW cooling compressor + 500W appliancies
Spot Welder - Mactronic V3.
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#6
(06-26-2019, 02:13 PM)Issac Wrote: Hej Marcin Smile

Great job, how's the outcome and capacity  ?
What did you use for fusing ?

Hey, sorry for late reply, now its something about 2,7 kWh
For fusing I use Eaton DC breakers, ANL fuse on battery, Schneider B10 at AC site

----

update  Big Grin

added repacked 77pcs. INR18650-29E and 35 LGDAS31865, now its 7S40P with ~2,7 kWh
added some breakers, bus bar and metal case










I waiting for DC breakers for PV cables

Battery cable is 25mm^2
Bus bars made from copper 20x10mm with holes for M8 screws
Batteries are on brown ceramic



I also was change solar panels for 2x 195W + 1x 315W



Best regards [Image: wink.png] 

Marcin
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#7
Looks nice - congratulations - Its so much fun at the stage where things start working!
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#8
In addition to the balancer, you need to add some sort of BMS to stop charge/discharge automatically when any one pack gets too high/low. It only takes a quick distraction at the wrong time to ruin the batteries by discharging too much, or a fire by charging too much.
Marrcin and OffGridInTheCity like this post
Modular PowerShelf using 3D printed packs.  30kWh and growing.
https://secondlifestorage.com/t-AJW22-s-...PowerShelf
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#9
(08-31-2019, 10:47 PM)ajw22 Wrote: In addition to the balancer, you need to add some sort of BMS to stop charge/discharge automatically when any one pack gets too high/low.  It only takes a quick distraction at the wrong time to ruin the batteries by discharging too much, or a fire by charging too much.

You right, can somebody recommend something cheaper than batrium system?
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#10
At the moment you have just a 300W inverter.
Say at peak it uses 600W
When the batteries are near empty, you have a system voltage of just 21V.
So the worst case current draw is 600W/21V ~= 29A

For charging, it should be around 525W / 21V ~= 25A

I think something like the following would be a reasonable start. I'd go with the 60A version. It not much more expensive, you get more safety headroom, and you get the option of using a higher wattage inverter in the future. You may need the USB/PC adapter to configure more advanced parameters.
https://www.aliexpress.com/item/32840764...574acdncWu
https://secondlifestorage.com/t-Good-Chinese-BMS-review

PS. not affiliated, but I use 3x of those 14s60A types (@30A max) in my powerwall. Very happy with them.
Modular PowerShelf using 3D printed packs.  30kWh and growing.
https://secondlifestorage.com/t-AJW22-s-...PowerShelf
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