Recent content by cat23


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    New Powerwall in Romania

    The stats on the panels (Pmax) : 280W (Vmp): 31.83 V (Imp): 8.76 A (Voc): 38.85 V (Isc): 9.33 A 60 cells(6 * 10) polycristaline So Batrium it is :D I have those packs already built, but i have cells for another 14-15 60p packs, too busy (lazy) toassemble them. Probably the second set will...
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    New Powerwall in Romania

    After a hiatus of over one year, I restart working on the powerwall. The inverter arrived, not the one I originally had in mind, but a PIP2424MSE1. It found it quite cheap ebay, delivered from inside EU, sot it arrived in an amazing four day interval. I already have built 9 60p packs, so as...
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    New Powerwall in Romania

    So, long time since my last update. I reconsidered some specs for my powerwall. I upsized the packs from 40p to 60p,the busbars will be made from 2x2.5mm twisted copper (the 6mm AC copper pipe is overkill). Probably tonight i will finish the first 2-3 packs. Pictures will follow soon. LE
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    Sanyo UR18650FK Cell Specifications

    I found six of these in a Dell pack, rated at 4700mAh. No markings on the cell, apart from the date, J53A. The wrapper in dark mate red, with teal -greenish ring. It comes out at 2350 mAh per cell, so probably a 2400. Sanyo is strange.
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    New Powerwall in Romania

    Actually it might help, because i havejust got todayanother 50 or so packs, so i will get closer to my target of 560for stage one :D Please keep me posted.
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    New Powerwall in Romania

    Nope, will wait until i have all the cells. i don't wantit's warranty to pass while sitting in the box
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    New Powerwall in Romania

    I already have 10 TPs, using them to make the initial charge on everythingexcept the Sanyos (there is some sort of temp protection on Opus, I think isgood to have it with Sanyo). The interesting fact is that LG behavedwell before the leak so.. probably bad luck. Good to know DIY is not dead in...
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    New Powerwall in Romania

    Me too,I would pay more if i could get better quality packs, because i have 300 good cells and 140 bad cells + 120 1000-1500 cells. Until now, I am surprised in a good way by the chineseCJ cells, 2200 mAh, from various compatible packs,all of them in 2100 2200 range. Worst of all, canadian made...
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    New Powerwall in Romania

    Salut George I'm considering some ebay sellers, one of them offers delivery from Belgium, this way avoiding the problems with the nosy and slowcustoms. For the moment, i'm not very concerned with the inverter because i still try to get the first 560 cells for the initial setup (got300 by now)...
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    New Powerwall in Romania

    I resoldered the connector, the OPUS is chuggingon anew batch of crappy Sanyos as I type this. The biggest problem was with the electrolyte, it was absorbed by the pcb substrate and turned it conductive. I had to scrape the pcb between the positive and ground traces until i removed all the...
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    New Powerwall in Romania

    Couple of days ago one LG cell decided to leak while in my OPUS. Nothing to warn about this, cell looking fine, no corrosion, 2.70V, low temp. It happened one hour into the test, the smell alerted me. After I opened the OPUS, i sawthe cell leaked directly onto the power connector, literally...
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    New Powerwall in Romania

    Just began presoldering the first 40 cells. I used a Weller WES51 with ETDD tip and lead free solder. Took around 5 minutes for 40 cells, worked very well,cells didn't get warm at all. I'm thinking to use 6mm diameter, 1mm thick ACcopper pipe as busbar, will do some tests as soon as i have a...
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    New Powerwall in Romania

    Hello guys. My name is Catalin and i'm on my way to build a powerwall (more of a powershed at the moment) in my hometown Craiova (RO). Couple of years ago I've got an Opus C-3400, decided to start testing and sorting 18650 cells. I had an idea about what I want but not very sure how to do it...
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