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Puerto Rico Powerwall
#1
Hi everyone ! 
I've been her for a while...looking, asking and learning. 
I think I had introduced myself before but here goes my powerwall presentation. I am a small business owner from  San Juan, Puerto Rico. In September 2016 there was a complete power grid failure due to a lightning strike on one of the main power generation plants. The whole island (100 miles long x 35 miles wide / 3.8 million people) was left in the dark for 3 days until the grid could power back up. 



I own a 6 seat barber shop and a car audio repair shop. By luck I had a Trace power inverter in the shop for repair (from a client that had problems charging but the inverter part worked. I hooked up 4 12v AGM 112ah batteries I had at the shop and wired in half my breaker panel. To my surprise, this worked great for 3 whole days buy my batteries drained completely down to 21 volts. Had a hard time recharging but decided to have some kind of electrical backup permanently built for the shop. Hey, It's my money maker! 
I ended up buying a 6.5kw diesel generator for the barber shop but I want something more silent, less smelly and less maintenence. 

Some how, some way I started looking for ideas, info and very soon ended up here. Learned a lot and I'm still learning. Most of the people in the youtube videos are part of this forum. 
My first bite on the 18650's came when I won an auction on ebay for a big lot of Ryobi 40v mower packs. I "recon" (caught that grom Peter's videos) y got about 600 cells on that lot. All Samsung/LG 1200~1400 cap cells in great condition, just dead in voltage. I devised a holder (4 cell) with a 20w / 20 ohm resistor in series to a 12v battery in order to "wake" them. Put them in the cradle and switch the 12v for 10 to 15 seconds while "hand monitoring" temp. The ramp up to 1.XX volts, enough to go to a string of 4056's and fully charge them up. From there to storage for 2 or 3 days and recheck voltage for drops. If they hold up, I send them to the Opus. So far, about 20 rejects in total, all shorted, only 1 open. For now I have them sorted by brand but marked from 1100 to 1460'ish. 

(Gonna add some Charge Station pics soon) 




Have not decided on pack shape but playing around with some buss bar ideas, case/enclosure ideas, monitoring/BMS/fan cooling and others before I build. 
 




I need these INSIDE the shop for security purposes so I chose a "spot" and in the process of building the case for them. Apart from being my power backup at the shop (I open 6 hours a day, 6 days a week) I hope to extend or enlarge the battery bank so I can maybe last my 6 day work week using everything I use now including A/C. I will be using a 7s setup with electrical (grid) recharging as I only need this as a power backup. Aa soon as this is all running smooth I will start adding more packs and solar panels for recharging. 





My wife says that this is a new "hobbie" for me and I agree. I enjoy the skill learning and the building process more than the actual usage for witch it was intended. Now all I need to figure out is how to "deviate" more funds without the wife getting upset about it. I will keep uploading more pics of my build on this same thread. 




A little bonus... this is my passion, what I do for a living... Car Amplifier repair. 
Thanks for reading!
hbpowerwall, BlueSwordM, Headrc And 1 others like this post
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#2
Good stuff there mate - welcome & thanks for sharing - have you entered your cells into the cell counter? http://secondlifestorage.com/cellcount.php
BlueSwordM likes this post
Arrow Opus Dischargers - Definitely my choice pick for dischargershttp://amzn.to/2CmSpmj
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#3
Nice build you got there m8!
BlueSwordM likes this post
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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#4
April 2018 update. 
Bumped to a 24v system in a 7s configuration. I built up as a modular system so I can keep adding and modifying my packs without having to tear them down. 
2100 cells on the wall, 1400 more on the table. 

Solexx X, hbpowerwall, Korishan And 3 others like this post
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#5
Very nice. I like the green fade you got goin on there Smile Too bad you didn't have good enough dark green cells to put in the very center to have 3 color fade. Maybe on the next batch Wink
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
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Certified 18650 Cell Reclamation Technician
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#6
looking good, how mnay cells in total ?
Arrow Opus Dischargers - Definitely my choice pick for dischargershttp://amzn.to/2CmSpmj
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#7
I noticed you posted your first powerwall right before the hurricane! How did the wall performed after that?
riveracc1 and Solexx X like this post
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#8
(04-14-2018, 02:17 AM)not2bme Wrote: I noticed you posted your first powerwall right before the hurricane! How did the wall performed after that?

I was tinkering with 18650's before Irma & Maria. I already had about 1000 unharvested cells to tackle. When the hurricanes hit I got up and running on my old AGM 450ah bank but it was old and failing. I stepped up the cell game and put up a 3S 12v system to get by and worked great. I just kept adding from there.

June 2018 updates.
Settled on 2800 cells 7S400p in 4 banks of 175ah. Got the Batrium up and running on 2 banks and rearranging the other 14 packs with better cells. Hope to have the other 14 packs up by the end of the month.
Total MAX power draw is around 2100W with everything running so my inverter is capable and more. I still have solar issues, getting some wiring re-done on a higher gauge and a new Charge controller for some extra panels.
Here's some progress pics.







Just boosting my cell count... ??





3100 and counting.
Korishan and wim like this post
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#9
Dam dude - that's looking awesome!
Arrow Opus Dischargers - Definitely my choice pick for dischargershttp://amzn.to/2CmSpmj
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#10
Very nice setup!!!
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