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  1. IronSky

    Small Powerwall in Germany

    Stuart Pittaway's new controller has arrived. The latest version of the controller uses an ESP32 and supports CANBUS, RS485, SD CARD logging, relays, SSR outputs, multiple inputs, AVR programmer and much more. Here are some pictures.
  2. IronSky

    [SELLING] (Germany) DIY BMS

    Modules are sold
  3. IronSky

    [SELLING] (Germany) DIY BMS

    I am selling some items for the Stuart Pittaway DIY BMS. 2 controller v4. The controllers are fully equipped. Only the LED has to be re-soldered, I can also include it. 14 modules v4.21. The modules are complete. The only thing missing is the ATTINY 841. The controllers cost € 5 each. The...
  4. IronSky

    Small Powerwall in Germany

    now with cooler
  5. IronSky

    Small Powerwall in Germany

    yes everything there is connected to. As soon as a certain value is reached, the relay switches. Yes it is in use. I only have a 1000 watt inverter on it and draw a maximum of about 20 to 25 A. The SSR doesn't get warm, not even a bit, so no heat sink. And sorry for the long wait for the...
  6. IronSky

    Small Powerwall in Germany

    The new relay module. There are 4 relays that can be switched separately. A contactor to separate the solar cells if a cell of the Powerwall has more than 4.15 volts. A solid-state relay that is in the minus line directly after the main fuse. It separates the complete battery from...
  7. IronSky

    Small Powerwall in Germany

    DiyBMS Update: New software from the Diy BMS and a small video where you can see the running light well :)
  8. IronSky

    Small Powerwall in Germany

    https://www.reichelt.de/kuehlkoerper-smd-13-mm-alu-29-k-w-ick-smd-b-13-sa-p227838.html?r=1 I took this and sawed through in the middle. You can also drill a hole in the middle, where the heat sensor is and the heat sink is completely on it. 19x13
  9. IronSky

    Esperyd?s Raspberry PI project

    Hello daromer, your Esperyds Raspberry PI project is running also on the PI 4?
  10. IronSky

    Small Powerwall in Germany

    Small update: Unfortunately, the Chinese BMS is defective after about 1 year. Although it still shows the voltage of each individual cell, it no longer switches off in the event of overvoltage or other errors. That's why I've now got the DIYBMS v4 and I'm very happy with it. A relay is coming...
  11. IronSky

    Controller diyBMS V4

    Hello, I'm looking for the controller for the DIY BMS V4. Maybe someone has one more to sell because you can usually only order 5 pieces from JLCPCB. Mfg Iron Sky Edit: I have now ordered some myself, if the 5 parts are there I can sell 2 and I will put them in here.
  12. IronSky

    Processed Submissions and Updates

    LGEBMJ11865 from E-Bike Bosch POWERPACK 500 FRAME 3.7V 3500mAh LG 18650MJ1 battery supply by UNICELL in Singapore UNICELL a Leading battery product supplier in Singapore Malaysia Indonesia Philippines Brunei and Thailand since 1986, we carry more the 66,000 model Order code...
  13. IronSky

    How to open a Gazelle E-Bike battery.

    Hi the small cases in the picture are bronze and no name, the bigger ones are silver, gold or platinum. on the label it says how many batteries are installed. The old batteries were simply glued with silicone, the new ones are now glued with epoxy adhesive and waterproof...
  14. IronSky

    Small Powerwall in Germany

    Well fine. Then my BMS protects my battery and kills the charge controller. :@
  15. IronSky

    Small Powerwall in Germany

    Update: New charge controller arrived after a long wait. Unfortunately, one must first buy an adapter from serial to USB to read the charge controller :( if someone is looking for a good adapter, I have the link on Amazon here. According to the instructions, first the battery...
  16. IronSky

    How to open a Gazelle E-Bike battery.

    I think it was a gold battery. The bronze battery is much shorter and Silver has less batteries
  17. IronSky

    15s120p Harvested NCR18650B Powerwall

    You can also leave the legs of the fuses longer. You can bend it quite well.
  18. IronSky

    Small Powerwall in Germany

    everything is going well so far. The BMS can handle a charging current of up to 100A. mfg
  19. IronSky

    Small Powerwall in Germany

    Update: Building the solar panels on a sandstone roof. Unfortunately, there are no suitable holders, so improvising :P after a few days it was done. New grounding installed due to lightning protection. Lightning protection fuses. two new inverters TS-400 and...
  20. IronSky

    Small Powerwall in Germany

    Charge state measuring, charging current, consumption current, and log file in an Excel spreadsheet is all there. Here is a picture of a test run with a test battery :
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