Notice To Unregistered Users: By visiting this forum, you are automatically agreeing to the terms and conditions set forth in our Safety Notice & User Agreement. All electrical work shall be completed by a qualified and licensed electrician. Admins, moderators, and members do not accept any liability for the information posted here. Please make sure to read the Safety Notice & User Agreement for the full disclosure. To remove this message, please register for an account.
Thread Rating:
  • 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Mike's DIY Powerwall
#1
I have been working on this project for a few months now, so rather than try to rehash everything thus far, I will just start the thread by discussing where I am at now, then post updates along the way.

I am building packs of 120 cells in parallel. I would estimate the average capacity per cell to be 2200mah. That gives me ~264ah per pack. This is the very first pack i made. I went with similar design as Peter, with a few changes. I am doing 6 wide (3 bus bars) rather than 4 (2 bus bars). Additionally, I decided to fuse both ends only because the fuse wire is so cheap, why not. Aside from that, it's mostly the same.
[Image: dUxLKJiQ.jpg]

Each bank consists of 7 packs, or 25.9v nominal voltage. This is the first bank I built. At the time of this post, it has been in service for 6 weeks and is still working great. The voltages per pack (when charged) only differ by 0.02v at most. When discharged, there are 2 week packs that fall to around 2.8v while the others remain at 3.3v. I will need to rebuild these packs at a later date.
[Image: jBowwAov.jpg] [Image: FuWlLVYA.jpg]

This is the second bank (packs 8-14) that I just finished a couple of days ago. I'm trying to come up with a way to capacity test the packs so I can group similar capacity packs together.
[Image: hJxfucCa.jpg]
#2
Nothing too special here. A standard Tracer charge controller and cheap inverter. I'm working on upgrading the equipment slowly. I did receive a PCM60X earlier this week which has been running for a few days now. I will post pictures/updates once I have more to share.
[Image: Bji3sKl8.jpg]
#3
What is the small box, on the bottom?
Cell progress: 2016/10/17:                                       Business Owner                                       Projects:
180cells@2.0                                             http://18650shrinkandcellholders.com                     http://www.PortableRecycledPower.com
600cells@2.1-2.6a                                                                                                                8Kw Powerwall  
70cells@2.7a+                                                                                                                     1Kw PowerBlade 
                                                                                                                                          16Kw PowerRack (concept)
                                                                                                                                          12v LED Sconce
#4
Toochi84 Wrote:What is the small box, on the bottom?
It's just a digital display for the charge controller. It shows the voltage, amps, etc. It has since been replaced with the PCM60X. I'll post a new picture once it is all pretty and organized.

<!-- m --><a class="postlink" href="https://www.amazon.com/Sun-YOBA-Tracer1210RN-Tracer1215RN-Tracer2210RN/dp/B00ECVWDGC/">https://www.amazon.com/Sun-YOBA-Tracer1 ... 00ECVWDGC/</a><!-- m -->
#5
mike Wrote:Nothing too special here. A standard Tracer charge controller and cheap inverter. I'm working on upgrading the equipment slowly. I did receive a PCM60X earlier this week which has been running for a few days now. I will post pictures/updates once I have more to share.
[Image: 3WllrcH.jpg]

Are you charging the batteries direct from the tracer? Are you disabling the float charge?
#6
Chickey Wrote:
mike Wrote:Nothing too special here. A standard Tracer charge controller and cheap inverter. I'm working on upgrading the equipment slowly. I did receive a PCM60X earlier this week which has been running for a few days now. I will post pictures/updates once I have more to share.
[Image: Bji3sKl8.jpg]

Are you charging the batteries direct from the tracer? Are you disabling the float charge?

Yes. They are connected directly. I just picked a battery setting that had a maximum voltage (bulk, float, equalization) below 28.7 (4.1*7). It is not the correct way to do it but it worked for the couple of weeks until my PCM60X arrived Smile
#7
[Image: UQue8ktR.jpg]

New 320w panels ready to install as soon as I can figure out how to attach them to the roof! Also converting the battery system to 48v for this. I need to go back and resolder 7 of my 14 packs so the busbars alternate each end.
#8
They are alot bigger than i thought they would be. Even tho i saw the dimensions when purchased. Reading and handling are two very different things.
Cell progress: 2016/10/17:                                       Business Owner                                       Projects:
180cells@2.0                                             http://18650shrinkandcellholders.com                     http://www.PortableRecycledPower.com
600cells@2.1-2.6a                                                                                                                8Kw Powerwall  
70cells@2.7a+                                                                                                                     1Kw PowerBlade 
                                                                                                                                          16Kw PowerRack (concept)
                                                                                                                                          12v LED Sconce
#9
mike Wrote:[Image: ORNsS2U.jpg]

New 320w panels ready to install as soon as I can figure out how to attach them to the roof! Also converting the battery system to 48v for this. I need to go back and resolder 7 of my 14 packs so the busbars alternate each end.

wow, that's a lot of solar power you got there Big Grin NICE!

Please do share how you end up mounting 'em

(Thanks for your awesome youtube channel!)
#10
super heavy too when you try to move them solo. I have 3 and it was awkward trying to maneuver them on to the rack. I'm not sure about roof mounting, but i used super strut attached to a wood frame to mount mine. Might be able to devise some roof mounts for the super strut.
Off Grid Setup
3 - 320watt 24v Panels - MPPSolar 2424LV-MSX - 672 Cell 96p7s 5.5kw Power Wall

Retired pack 2kw 420 Cell

On Grid Setup
44 - 250 Watt Panels with Enphase micro inverters


Who read this thread?
100 User(s) read this thread:
hbpowerwall (07-07-2017, 07:28 AM), AZ_Tekkie (06-23-2017, 05:03 AM), Chickey (06-22-2017, 05:13 PM), Brian Lawrence (04-16-2017, 08:37 PM), daromer (06-23-2017, 05:40 PM), FiremanDIYPowerwall (05-08-2018, 02:04 AM), Sean (02-14-2017, 03:16 PM), mike (05-16-2018, 11:36 AM), Toochi84 (09-27-2017, 03:38 AM), goodnowm (10-16-2017, 05:15 AM), Swolrath (06-02-2017, 12:13 PM), AveRageJoe (07-07-2017, 04:29 AM), BigBen (06-20-2017, 03:35 AM), station240 (02-14-2017, 09:44 AM), PaulKennett (06-02-2017, 11:36 AM), Joaquinsfy (02-15-2017, 09:23 PM), 49er (07-03-2017, 04:36 PM), NiVa (06-20-2017, 12:34 AM), Lux_Gamer (06-24-2017, 10:06 AM), Andreas Kvernes (03-21-2017, 09:48 PM), owitte (06-20-2017, 08:52 AM), opus40 (06-01-2017, 12:45 PM), RudyLiPower (06-24-2017, 04:09 PM), miwall (04-09-2017, 08:06 PM), lgeo (05-29-2017, 04:49 PM), dakoal (02-27-2017, 10:58 AM), VdVoort4 (05-16-2018, 06:53 PM), Grazor (05-24-2017, 01:00 PM), Majorphill (06-20-2017, 12:20 AM), Elwood (02-18-2017, 10:16 PM), frasernator (02-10-2017, 03:21 AM), riveracc1 (08-10-2017, 08:28 AM), coolfx (06-25-2017, 06:35 AM), Herebus (04-10-2017, 08:57 AM), timholmesjr (05-08-2017, 01:42 AM), Rerouter (02-13-2017, 07:49 PM), cstanley (06-01-2017, 02:33 PM), BatteryDIY (02-10-2017, 06:16 PM), DanielD (04-09-2017, 03:37 PM), ruby2 (06-23-2017, 02:27 AM), JustJim (12-26-2017, 02:40 AM), Korishan (06-23-2017, 06:29 PM), P.Tasyo Powerwall (04-09-2017, 04:50 PM), PAF (06-23-2017, 09:51 PM), brettwatty (02-21-2018, 01:18 AM), FERCSA (06-25-2017, 11:24 AM), rumey (02-15-2017, 01:45 PM), Prahe86 (08-30-2017, 06:41 PM), Janis (03-07-2017, 07:45 PM), FireFrog (02-14-2017, 02:18 AM), APD (02-15-2017, 02:38 AM), pfromero (03-10-2017, 06:39 PM), Alexander (02-06-2017, 09:11 AM), theDIYHobbyist (02-15-2017, 02:30 AM), Yves (02-11-2017, 07:16 PM), Bob Muster (03-07-2017, 01:25 AM), Jose Reyes (05-14-2017, 09:19 PM), Franky Beuselinck (06-12-2017, 07:34 PM), Gazza (02-14-2017, 12:32 AM), Daniel Barbu (02-17-2017, 09:32 PM), steve (02-17-2017, 12:42 PM), Batrium (06-23-2017, 12:40 PM), Darmok (06-01-2017, 04:56 PM), Wattsup (03-01-2017, 12:18 AM), Scepterr (06-23-2017, 05:37 PM), Project (04-09-2017, 02:57 AM), Batteriapan (03-13-2017, 02:12 AM), BobinTN (04-17-2017, 07:20 PM), Tristan Timmer (04-02-2017, 11:12 AM), Felineman (03-11-2017, 01:18 AM), Swazytrain (03-19-2017, 09:26 PM), Tshillingburg (10-29-2017, 01:46 AM), Frnandu Martiński (10-26-2017, 07:56 PM), egam (06-23-2017, 05:35 PM), skyfridge (03-11-2017, 12:30 AM), CrankyCoder (07-11-2017, 04:03 PM), Alec_J (08-17-2017, 03:36 AM), flight4900 (06-21-2017, 08:51 AM), Droid126 (05-24-2017, 06:30 PM), Sohax (04-11-2017, 01:31 PM), C11MAN (04-10-2017, 05:16 PM), jdeadman (06-23-2017, 05:26 PM), charlie246 (05-25-2017, 04:03 AM), Rechargedwalls (04-09-2017, 02:02 AM), crud (10-09-2017, 08:42 AM), 2146 (06-01-2017, 09:28 PM), wim (06-08-2018, 07:35 AM), hugo5464 (04-09-2017, 09:52 PM), wimpie007 (06-25-2017, 03:46 AM), coconut2k13 (04-11-2017, 01:29 PM), MajStealth (06-01-2017, 08:46 PM), ericg (04-20-2017, 07:50 PM), Joe Farrugia (11-16-2017, 12:32 PM), frnandu (08-29-2017, 09:09 PM), DoubleZed (04-21-2017, 07:17 PM), melsom (06-20-2017, 09:35 AM), Brian Drury (06-25-2017, 06:55 AM), typ49 (06-23-2017, 08:40 AM), VicRC (05-12-2017, 08:39 AM), Tommy Ng (06-08-2017, 11:38 PM)

Forum Jump:


Users browsing this thread: 2 Guest(s)