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73 lines
5 KiB
Markdown
73 lines
5 KiB
Markdown
# Battery-Emulator ⚡🔋
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This software enables EV battery packs to be used for stationary storage. It achieves this by converting the EV battery CAN data into a brand battery format that solar inverters can understand. This makes it extremely cheap and easy to use large EV batteries in a true plug'n'play fashion!
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## Hardware requirements 📜
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This code fits on the LilyGo ESP32 T-CAN485 devboard , see https://github.com/Xinyuan-LilyGO/T-CAN485
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You will also need a complete EV battery. [See the battery compability list on which are supported.](https://github.com/dalathegreat/BYD-Battery-Emulator-For-Gen24/wiki#supported-batteries-list)
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Finally, you will need a [compatible hybrid solar inverter](https://github.com/dalathegreat/BYD-Battery-Emulator-For-Gen24/wiki#supported-inverters-list), for example the "Fronius Gen24" or "GoodWe ET"
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## Installation basics 🪛
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1. Connect one end of the LilyGo RS485 to the Gen24 Modbus
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2. Connect the other end of the LilyGo to the CAN side of the battery
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3. Wire up high voltage cable between the Gen24 and the battery
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4. Add a 5-12V power source to power the LilyGo and 12V to the battery (uninterruptible PSU or 12V lead acid recommended in parallel)
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5. Some batteries need manual pre-charge circuit and positive/negative contactor control. Others are automatic. See the wiki for more info.
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6. Enjoy a big cheap grid connected battery!
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## Wiring example, LEAF battery 💡
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Here's how to wire up the communication between the components.
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Here's how to connect the high voltage lines
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For more examples showing wiring, see each battery types own Wiki page. For instance the [Nissan LEAF page](https://github.com/dalathegreat/BYD-Battery-Emulator-For-Gen24/wiki/Nissan-LEAF-battery#wiring-diagram)
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## How to compile the software 💻
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1. Download the Arduino IDE: https://www.arduino.cc/en/software
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2. When the Arduino IDE has been started;
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Click "File" in the upper left corner -> Preferences -> Additional Development >Board Manager URL -> Enter the URL in the input box https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
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3. Go to "Boards Manager", and install the ESP32 package by Espressif Systems
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4. The arduino settings should be set to "ESP32 Dev Module" with the following settings;
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5. Select which battery type you will use, along with other optional settings. This is done in the USER_SETTINGS.h file.
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6. Press Verify and Upload to send the sketch to the board.
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NOTE: In some cases, the LilyGo must be powered through the main power connector instead of USB-C
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when performing the initial firsmware upload.
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NOTE: On Mac, the following USB driver may need to be installed: https://github.com/WCHSoftGroup/ch34xser_macos
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This video explains all the above mentioned steps:
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https://youtu.be/_mH2AjnAjDk
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## Dependencies 📖
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This code uses two libraries, ESP32-Arduino-CAN (https://github.com/miwagner/ESP32-Arduino-CAN/) slightly modified for this usecase, and the eModbus library (https://github.com/eModbus/eModbus). Both these are already located in the Software folder for an easy start.
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It is also based on the info found in the following excellent repositories/websites:
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- https://gitlab.com/pelle8/gen24
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- https://github.com/burra/byd_battery
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- https://github.com/flodorn/TeslaBMSV2
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- https://github.com/SunshadeCorp/can-service
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- https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3
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- https://github.com/dalathegreat/leaf_can_bus_messages
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- https://github.com/rand12345/solax_can_bus
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- https://github.com/Tom-evnut/BMWI3BMS/ SMA-CAN
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- https://github.com/maciek16c/hyundai-santa-fe-phev-battery
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- Renault Zoe CAN Matrix https://docs.google.com/spreadsheets/u/0/d/1Qnk-yzzcPiMArO-QDzO4a8ptAS2Sa4HhVu441zBzlpM/edit?pli=1#gid=0
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- Pylon hacking https://www.eevblog.com/forum/programming/pylontech-sc0500-protocol-hacking/
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## Like this project? 💖
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Leave a ⭐ If you think this project is useful. Consider hopping onto my Patreon to encourage more open-source projects!
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<a href="https://www.patreon.com/dala">
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<img src="https://c5.patreon.com/external/logo/become_a_patron_button@2x.png" width="160">
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</a>
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