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There's a new wall in Germany!
#21
(06-10-2017, 12:22 PM)NERDVille Wrote: 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?

thanks a lot, I always try to be an artist and an engineer at the same time Big Grin . Don't know yet about winter use, but last year, I dropped my average grid consumption per month from 250 in 2015 (without any solar power) to 200 kWh - only with my lead-acid batteries and less solar power than I have now. For May this year, grid consumption dropped from 175kWh in 2016 to 85kWh this year, actually more than 50% Cool .

And currently I'm running permanently on batteries since May 20th, so for more than 3 weeks - grid consumption in June so far: 10.6kWh Smile . I think in summer I'll save more than 90%... Here's a proof:

(the green part is during daytime, the blue part from 10pm to 6am)

Have sun!
Oliver

Cells tested: 5536 (overall: 10854 Ah, average: 1960 mAh)
Cells in production: 2940 (overall: 6174 Ah, average: 2100 mAh)
Wall bank: 7s320p, 672 Ah, 16 kWh
Box bank: 7s100p, 210 Ah, 5 kWh
Project page
Live solar/powerwall values
Daily graph
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#22
I love that you reused copper tubing. Not only do you get thicker/stronger copper but it's also exactly the size needed and probably a lot cheaper than buying premade lugs. Where did you get the copper strips from; old transformers?
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

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#23
the copper tubes are not reused, I buy them at the local hardware store (15mm diameter, 2.5m long), then cut and bend them for my needs. But you're right, the size and thickness is fitting ideally, it's an easy to work with material and it's much cheaper than using premade components Smile . All this designated high current stuff can be really expensive...
Korishan likes this post

Cells tested: 5536 (overall: 10854 Ah, average: 1960 mAh)
Cells in production: 2940 (overall: 6174 Ah, average: 2100 mAh)
Wall bank: 7s320p, 672 Ah, 16 kWh
Box bank: 7s100p, 210 Ah, 5 kWh
Project page
Live solar/powerwall values
Daily graph
Reply
#24
Hi, I'm Stefaan from Belgium,

just a quick question

last photo, the measuring device on the left, do you have a link to where to buy, looks what I'm looking for.

best regards

Stefaan
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#25
(06-25-2017, 07:19 PM)Stefaan De Ridder Wrote: Hi, I'm Stefaan from Belgium,

just a quick question

last photo, the measuring device on the left, do you have a link to where to buy, looks what I'm looking for.

best regards

Stefaan

Hi Stefaan,

it's a CellLog 8M, you can find it at AliExpress or Banggood.

Have sun Smile
Oliver

Cells tested: 5536 (overall: 10854 Ah, average: 1960 mAh)
Cells in production: 2940 (overall: 6174 Ah, average: 2100 mAh)
Wall bank: 7s320p, 672 Ah, 16 kWh
Box bank: 7s100p, 210 Ah, 5 kWh
Project page
Live solar/powerwall values
Daily graph
Reply
#26
Nice work.
Much better than the last wall in Germany ?
owitte likes this post
                                                Choose LiFe  Wink

                      May all your batteries be fully charged and perfectly balanced  Cool
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#27
(07-03-2017, 07:22 AM)Wattsup Wrote: Nice work.
Much better than the last wall in Germany ?

yep Smile , that's the only kind of wall we need - the more, the better Big Grin

just a short update on my power savings:

I was continuously on batteries from May, 20th to July, 1st, so the whole June most of my house was powered from my powerwall. I still have to do the meassuring part for the solar system, but at least I can see from my smart meter how much grid consumption is left:

June 2017 (with LA batteries and 18650 powerwall): 22,25 kWh
June 2016 (less solar power, LA batteries only): 122,1 kWh -> Savings: 72,8%
June 2015 (no solar, no batteries): 235,5 kWh -> Savings: 90,5%

Never thought it would be that much, I expected savings around 50,  max. 60% Smile . Hope we'll have a sunny summer over here Cool

Have sun!
Oliver
Wattsup, curasun, Korishan And 1 others like this post

Cells tested: 5536 (overall: 10854 Ah, average: 1960 mAh)
Cells in production: 2940 (overall: 6174 Ah, average: 2100 mAh)
Wall bank: 7s320p, 672 Ah, 16 kWh
Box bank: 7s100p, 210 Ah, 5 kWh
Project page
Live solar/powerwall values
Daily graph
Reply
#28
Awesome! Great motivation for getting on with my powerwall :-) !

Did you have a lot of issues with the cells ? Like swapping dead or weak cells in your packs over the passed weeks?

Best,
Chris
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#29
This is great. Love to see the non-standard ways people have evolved this systems.
owitte likes this post
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#30
(07-12-2017, 07:27 AM)crud Wrote: Awesome! Great motivation for getting on with my powerwall :-) !

Did you have a lot of issues with the cells ? Like swapping dead or weak cells in your packs over the passed weeks?

Best,
Chris

nope Cool no issues so far. Everything is running smoothly, voltage dis-balance between series is always between 30 and 40mV, nothing is getting hot or even warm, not even on high loads. Once I meassured 125A flowing from the batteries to the inverter while the washing machine was running. The cable to the inverter was a little bit shaking/oscillating, so I could even feel the power flowing through it Big Grin ...

Have sun!
Oliver
Ibiza and Everythings-stuck-together like this post

Cells tested: 5536 (overall: 10854 Ah, average: 1960 mAh)
Cells in production: 2940 (overall: 6174 Ah, average: 2100 mAh)
Wall bank: 7s320p, 672 Ah, 16 kWh
Box bank: 7s100p, 210 Ah, 5 kWh
Project page
Live solar/powerwall values
Daily graph
Reply


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