Recent content by Marrcin

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  1. Marrcin


    Good job! :)
  2. Marrcin

    My 15kWh Powerwall

    Nice :rolleyes: How many kWh now?
  3. Marrcin

    Powerwall demo

    Thx, Yes :) Temporary mounting
  4. Marrcin

    Powerwall demo

    Updated to 7s60p -> 4 kWh I designed it to 60A max(1A per cell) Packs busbars are equal for every cell, I made it from 35mm^2 copper wire Next step is 60A BMS and main battery busbar (to connect other 7s packs i future)
  5. Marrcin

    Sony US18650V3 Cell Specifications

    more data @pdf
  6. Marrcin

    Twisted busbar for 3s 11.1V 45A

    At 3s20p like on your picture you'll need over 1.2m of busbars. For 12V 45A at 12mm^2 copper (not taking into account crimping resistances and wirring cell-busbar!) You will lost 7.5W on heat
  7. Marrcin

    18650 low capacity cells are safe?

    Hi, charge cells to 4.2V then check self discharging - give them few weeks and check voltage drop Exploited battery do not have 1% of capacity because they will have big self discharge or wasting charge current on heat Cell cycle life is depend from using currents, bottom and top voltage...
  8. Marrcin

    cells that are more than original capacity?/

    1. Look at data sheet -> check battery capacity at discharge current (mA or C) 2 Check Your discharge current Bigger discharge current = less battery capacity Temperature also is matters
  9. Marrcin

    Powerwall demo

    thank You
  10. Marrcin

    Powerwall demo

    You right,can somebody recommend something cheaper than batrium system?
  11. Marrcin

    Powerwall demo

    Hey, sorry for late reply, now itssomething about 2,7 kWh For fusing I use Eaton DC breakers, ANL fuse on battery,SchneiderB10 at AC site ---- update :D added repacked 77pcs. INR18650-29E and 35LGDAS31865, now its 7S40P with ~2,7 kWh added some breakers, bus barand metal case...