Beginners Guide to Processing 18650 Cells | Cell Database


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There's a new wall in Germany!
#1


Hi all,

this is my powerwall, consisting of 1400 cells in a 200p7s configuration, expandable as long as there's wall Big Grin . Up and running since a few weeks, currently 9 days non-stop off-grid, still counting  Cool .

As you can see from the pics, I took the word powerwall literally and hung 70 packs of 20 cells on a wall in the basement. Connections are all made from copper water tubes (cheapest copper source in town) with a little bending and soldering work.

One vertical row is roughly 1kWh, overall 420Ah / 10kWh. Still in conjunction with my older battery setup (aka the tower of power), 8 sealed lead-acid solar batteries with 940Ah.



Any feedback appreciated Smile

Have sun!
Oliver

P.S.: This is my grid consumption for the current month so far, daily average now is 21W / <0.5kWh - so my house consumes as much power as a laptop Big Grin :
Korishan, zag2me, hbpowerwall And 3 others like this post

Cells tested: 4238 (overall: 8077 Ah, average: 1906 mAh)
Cells in production: 2240 (overall: 4704 Ah, average: 2100 mAh)
Powerwall config: 7s320p, 672 Ah, 16 kWh
What's left: my current grid consumption

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#2
Looks Awesome. Nice to see the Power Usage that low
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#3
holy ....

except the ducttape there. spaceefficient nontheless

where do you live? like what state
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#4
Awesome!
Even for the Guines Book of records!

Gratuliere!
BigBen

Pipe conductors - my goodness! Cheap and effective...

You can use them even as radar wave conductors or heating/cooling elements... hahaha

A whole wall of power made in Germany!

Oliver, you are the champion! I like that!

BigBen
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#5
(05-29-2017, 05:31 PM)MajStealth Wrote: holy ....

except the ducttape there. spaceefficient nontheless

where do you live? like what state

yeah, ducttape is just for temporary fixing the displays on the door... blew up my arduino data logger a while ago and didn't have time to fix it, yet. And space is not an issue, still have enough wall for another six rows/42 packs/840 cells. But I already have a plan for nice, compact 5kWh modules (700 cells) with integrated cooling, temperature control and emergency switch-off.

I live in Braunschweig, almost in the middle of Germany.

(05-29-2017, 05:33 PM)BigBen Wrote: Awesome!
Even for the Guines Book of records!

Gratuliere!
BigBen

Pipe conductors - my goodness! Cheap and effective...

You can use them even as radar wave conductors or heating/cooling elements... hahaha

A whole wall of power made in Germany!

Oliver, you are the champion! I like that!

BigBen

thanks for the nice words, BigBen Smile . In fact, it's really very cheap and effective to use these pipes. Good electrical properties, easy to make, easy to expand and easy to mount/unmout battery packs. Don't know why nobody else came up with this idea... But I wouldn't recommend using them for cooling/heating at the same time... don't really like the idea of massive current and water flowing next to each other Big Grin

(05-29-2017, 04:55 PM)jdeadman Wrote: Looks Awesome.  Nice to see the Power Usage that low

thanks Smile

If anyone's interested: The power usage comes from the provider of my smart meter. Don't know if it's available outside of Germany, there website doesn't look very international... You may check at www.discovergy.com.

My current grid consumption can always be watched in realtime here.

Cells tested: 4238 (overall: 8077 Ah, average: 1906 mAh)
Cells in production: 2240 (overall: 4704 Ah, average: 2100 mAh)
Powerwall config: 7s320p, 672 Ah, 16 kWh
What's left: my current grid consumption

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#6
Just awesome - you get a star too Smile
BlueSwordM and owitte like this post
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#7
Sehr gut gemacht - very nice!

I see no BMS? Dont you have one?
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#8
(06-09-2017, 08:36 AM)eAnic Wrote: Sehr gut gemacht - very nice!

I see no BMS? Dont you have one?

Danke Smile

I don't have a BMS for reasons I pointed out here, but I'm using balancers (the small black boxes on the right side).

Have sun!
Oliver

Cells tested: 4238 (overall: 8077 Ah, average: 1906 mAh)
Cells in production: 2240 (overall: 4704 Ah, average: 2100 mAh)
Powerwall config: 7s320p, 672 Ah, 16 kWh
What's left: my current grid consumption

Reply
#9
Not only a work of art straight out of the Tate gallery but amazing savings on your power consumption. How much do you think your bill has dropped? and what are your estimates for winter use?
owitte likes this post
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#10
Looks pretty cool. I like the fact that there are more and more projects in germany.
Officially you have to register a PV battery with the state or power company or whatever, is yours registered or unofficial? I presume you have to register it so they can put some tax on us at one point Big Grin
I wont be registering mine as it will be totally off grid.

all the best!
owitte likes this post
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