Python module to interface with Tesla Energy Gateways for Powerwall and solar power data. Currently supporting local access to Powerwall, Powerwall 2 and Powerwall+ systems and Tesla Owner cloud API for all systems including Solar Only and Powerwall 3 systems.

This python module can be used to monitor and control Tesla Energy Powerwalls. It uses a single class (Powerwall) and simple functions to fetch energy data and poll API endpoints on the Gateway.

pyPowerwall will cache the authentication headers and API call responses to help reduce the number of calls made to the Gateway (useful if you are polling the Powerwall frequently for trending data).

• Works with Tesla Energy Gateways - Powerwall and Powerwall+
• Simple access through easy to use functions using customer credentials
• Will cache authentication to reduce load on Powerwall Gateway
• Will cache responses to limit number of calls to Powerwall Gateway (optional/user definable)
• Will re-use http connections to Powerwall Gateway for reduced load and faster response times
• Easy access to decoded binary device vitals (/api/devices/vitals in JSON format)
• Provides solar string data for Powerwall+ systems

NOTE: This module requires that you (or your installer) have set up Customer Login credentials on your Powerwall Gateway.

You can clone this repo or install the package with pip. Once installed, pyPowerwall can scan your local network to find th IP address of your Tesla Powerwall Gateway.

# Install pyPowerwall
python3 -m pip install pypowerwall

# Scan Network for Powerwalls
python3 -m pypowerwall scan

# (optional) Setup to use Tesla Owners cloud API
python3 -m pypowerwall setup

FreeBSD users can install from ports or pkg FreshPorts:

Via pkg:

# pkg install net-mgmt/py-pypowerwall

Via ports:

# cd /usr/ports/net-mgmt/py-pypowerwall/ && make install clean

Note: pyPowerwall installation will attempt to install these required python packages: requests, protobuf and teslapy.

After importing pypowerwall, you simply create a handle for your Powerwall device and call function to poll data. Here is an example:

    import pypowerwall

    # Optional: Turn on Debug Mode
    # pypowerwall.set_debug(True)

    # Local Mode - Credentials for your Powerwall - Customer Login
    password='password'
    email='[email protected]'
    host = "10.0.1.123"               # Address of your Powerwall Gateway
    timezone = "America/Los_Angeles"  # Your local timezone

    # (Optional) Cloud Mode - Requires Setup
    password = ""
    email='[email protected]'
    host = ""
    timezone = "America/Los_Angeles"  # Your local timezone
 
    # Connect to Powerwall
    pw = pypowerwall.Powerwall(host,password,email,timezone)

    # Some System Info
    print("Site Name: %s - Firmware: %s - DIN: %s" % (pw.site_name(), pw.version(), pw.din()))
    print("System Uptime: %s\n" % pw.uptime())

    # Pull Sensor Power Data
    grid = pw.grid()
    solar = pw.solar()
    battery = pw.battery()
    home = pw.home()

    # Display Data
    print("Battery power level: %0.0f%%" % pw.level())
    print("Combined power metrics: %r" % pw.power())
    print("")

    # Display Power in kW
    print("Grid Power: %0.2fkW" % (float(grid)/1000.0))
    print("Solar Power: %0.2fkW" % (float(solar)/1000.0))
    print("Battery Power: %0.2fkW" % (float(battery)/1000.0))
    print("Home Power: %0.2fkW" % (float(home)/1000.0))
    print("")

    # Raw JSON Payload Examples
    print("Grid raw: %r\n" % pw.grid(verbose=True))
    print("Solar raw: %r\n" % pw.solar(verbose=True))

    # Display Device Vitals
    print("Vitals: %r\n" % pw.vitals())

    # Display String Data
    print("String Data: %r\n" % pw.strings())

 set_debug(True, color=True)

 Classes
    Powerwall(host, password, email, timezone, pwcacheexpire, timeout, poolmaxsize, 
              cloudmode, siteid, authpath, authmode)

 Parameters
    host                      # Hostname or IP of the Tesla gateway
    password                  # Customer password for gateway
    email                     # (required) Customer email for gateway / cloud
    timezone                  # Desired timezone
    pwcacheexpire = 5         # Set API cache timeout in seconds
    timeout = 5               # Timeout for HTTPS calls in seconds
    poolmaxsize = 10          # Pool max size for http connection re-use (persistent
                                connections disabled if zero)
    cloudmode = False         # If True, use Tesla cloud for data (default is False)
    siteid                    # If cloudmode is True, use this siteid (default is None)  
    authpath                  # Path to cloud auth and site cache files (default is "")
    authmode = "cookie"       # "cookie" (default) or "token" - use cookie or bearer token for auth

 Functions 
    poll(api, json, force)    # Return data from Powerwall api (dict if json=True, bypass cache force=True)
    level()                   # Return battery power level percentage
    power()                   # Return power data returned as dictionary
    site(verbose)             # Return site sensor data (W or raw JSON if verbose=True)
    solar(verbose):           # Return solar sensor data (W or raw JSON if verbose=True)
    battery(verbose):         # Return battery sensor data (W or raw JSON if verbose=True)
    load(verbose)             # Return load sensor data (W or raw JSON if verbose=True)
    grid()                    # Alias for site()
    home()                    # Alias for load()
    vitals(json)              # Return Powerwall device vitals (dict or json if True)
    strings(json, verbose)    # Return solar panel string data
    din()                     # Return DIN
    uptime()                  # Return uptime - string hms format
    version()                 # Return system version
    status(param)             # Return status (JSON) or individual param
    site_name()               # Return site name
    temps()                   # Return Powerwall Temperatures
    alerts()                  # Return array of Alerts from devices
    system_status(json)       # Returns the system status
    battery_blocks(json)      # Returns battery specific information merged from 
                              # system_status() and vitals()
    grid_status(type)         # Return the power grid status, type ="string" (default),
                              # "json", or "numeric":
                              #     - "string": "UP", "DOWN", "SYNCING"
                              #     - "numeric": -1 (Syncing), 0 (DOWN), 1 (UP)
    is_connected()            # Returns True if able to connect to Powerwall
    get_reserve(scale)        # Get Battery Reserve Percentage
    get_time_remaining()      # Get the backup time remaining on the battery
    

The following are some useful tools based on pypowerwall:

• Powerwall Proxy - Use this caching proxy to handle authentication to the Powerwall Gateway and make basic read-only API calls to /api/meters/aggregates (power metrics), /api/system_status/soe (battery level) and many others. This is useful for metrics gathering tools like telegraf to pull metrics without needing to authenticate. Because pyPowerwall is designed to cache the auth and high frequency API calls, this will also reduce the load on the Gateway and prevent crash/restart issues that can happen if too many session are created on the Gateway.

• Powerwall Simulator - A Powerwall simulator to mimic the responses from the Tesla Powerwall Gateway. This is useful for testing purposes.

• Powerwall Dashboard - Monitoring Dashboard for the Tesla Powerwall using Grafana, InfluxDB, Telegraf and pyPowerwall.

pyPowerwall has a built in feature to scan your network for available Powerwall gateways. This will help you find the IP address of your Powerwall.

# Install pyPowerwall if you haven't already
python -m pip install pypowerwall

# Scan Network for Powerwalls
python -m pypowerwall scan

Example Output

pyPowerwall Network Scanner [0.1.2]
Scan local network for Tesla Powerwall Gateways

    Your network appears to be: 10.0.1.0/24

    Enter Network or press enter to use 10.0.1.0/24: 

    Running Scan...
      Host: 10.0.1.16 ... OPEN - Not a Powerwall
      Host: 10.0.1.26 ... OPEN - Not a Powerwall
      Host: 10.0.1.36 ... OPEN - Found Powerwall 1232100-00-E--TG123456789ABG
      Done                           

Discovered 1 Powerwall Gateway
     10.0.1.36 [1232100-00-E--TG123456789ABG]

The following APIs are a result of help from other projects as well as my own investigation.

• pw.poll('/api/system_status/soe') - Battery percentage (JSON with float 0-100)

  {"percentage":40.96227949234631}

• pw.poll('/api/meters/aggregates') - Site, Load, Solar and Battery (JSON)

  {
     "site": {
        "last_communication_time": "2021-11-22T22:15:06.590577619-07:00",
        "instant_power": -23,
        "instant_reactive_power": -116,
        "instant_apparent_power": 118.25819210524064,
        "frequency": 0,
        "energy_exported": 3826.313294918422,
        "energy_imported": 1302981.2128324094,
        "instant_average_voltage": 209.59546822390985,
        "instant_average_current": 5.4655000000000005,
        "i_a_current": 0,
        "i_b_current": 0,
        "i_c_current": 0,
        "last_phase_voltage_communication_time": "0001-01-01T00:00:00Z",
        "last_phase_power_communication_time": "0001-01-01T00:00:00Z",
        "timeout": 1500000000,
        "num_meters_aggregated": 1,
        "instant_total_current": 5.4655000000000005
     },
     "battery": {
        "last_communication_time": "2021-11-22T22:15:06.590178016-07:00",
        "instant_power": 1200,
        "instant_reactive_power": 0,
        "instant_apparent_power": 1200,
        "frequency": 59.997,
        "energy_exported": 635740,
        "energy_imported": 730610,
        "instant_average_voltage": 242.15000000000003,
        "instant_average_current": -28.6,
        "i_a_current": 0,
        "i_b_current": 0,
        "i_c_current": 0,
        "last_phase_voltage_communication_time": "0001-01-01T00:00:00Z",
        "last_phase_power_communication_time": "0001-01-01T00:00:00Z",
        "timeout": 1500000000,
        "num_meters_aggregated": 2,
        "instant_total_current": -28.6
     },
     "load": {
        "last_communication_time": "2021-11-22T22:15:06.590178016-07:00",
        "instant_power": 1182.5,
        "instant_reactive_power": -130.5,
        "instant_apparent_power": 1189.6791584288599,
        "frequency": 0,
        "energy_exported": 0,
        "energy_imported": 2445454.899537491,
        "instant_average_voltage": 209.59546822390985,
        "instant_average_current": 5.641820455472543,
        "i_a_current": 0,
        "i_b_current": 0,
        "i_c_current": 0,
        "last_phase_voltage_communication_time": "0001-01-01T00:00:00Z",
        "last_phase_power_communication_time": "0001-01-01T00:00:00Z",
        "timeout": 1500000000,
        "instant_total_current": 5.641820455472543
     },
     "solar": {
        "last_communication_time": "2021-11-22T22:15:06.594908129-07:00",
        "instant_power": 10,
        "instant_reactive_power": 0,
        "instant_apparent_power": 10,
        "frequency": 59.988,
        "energy_exported": 1241170,
        "energy_imported": 0,
        "instant_average_voltage": 241.60000000000002,
        "instant_average_current": 0.04132231404958678,
        "i_a_current": 0,
        "i_b_current": 0,
        "i_c_current": 0,
        "last_phase_voltage_communication_time": "0001-01-01T00:00:00Z",
        "last_phase_power_communication_time": "0001-01-01T00:00:00Z",
        "timeout": 1000000000,
        "num_meters_aggregated": 1,
        "instant_total_current": 0.04132231404958678
     }
  }

• pw.strings(jsonformat=True)

  {
     "A": {
        "Connected": true,
        "Current": 1.81,
        "Power": 422.0,
        "State": "PV_Active",
        "Voltage": 230.0
     },
     "B": {
        "Connected": false,
        "Current": 0.0,
        "Power": 0.0,
        "State": "PV_Active",
        "Voltage": -2.5
     },
     "C": {
        "Connected": true,
        "Current": 4.47,
        "Power": 892.0,
        "State": "PV_Active",
        "Voltage": 202.4
     },
     "D": {
        "Connected": true,
        "Current": 4.44,
        "Power": 889.0,
        "State": "PV_Active_Parallel",
        "Voltage": 202.10000000000002
     }
  }

• pw.temps(jsonformat=True)

  {
     "TETHC--2012170-25-E--TGxxxxxxxxxxxx": 17.5,
     "TETHC--3012170-05-B--TGxxxxxxxxxxxx": 17.700000000000003
  }

• pw.status(jsonformat=True)

  {
     "din": "1232100-00-E--TGxxxxxxxxxxxx",
     "start_time": "2022-01-05 09:20:47 +0800",
     "up_time_seconds": "62h48m24.076725628s",
     "is_new": false,
     "version": "21.44.1 c58c2df3",
     "git_hash": "c58c2df39ec207708c4cde0c747db7cf31750f29",
     "commission_count": 8,
     "device_type": "teg",
     "sync_type": "v2.1",
     "leader": "",
     "followers": null,
     "cellular_disabled": false
  }

• pw.vitals(jsonformat=True)

  • Example Output: here
  • Produces device vitals and alerts. For more information see here.

• pw.grid_status(type="json")

  {
   "grid_services_active": false,
   "grid_status": "SystemGridConnected"
  }

• pw.system_status(jsonformat=True)

  {
   "all_enable_lines_high": true,
   "auxiliary_load": 0,
   "available_blocks": 2,
   "battery_blocks": [
       {
           "OpSeqState": "Active",
           "PackagePartNumber": "3012170-10-B",
           "PackageSerialNumber": "TG122xxx", 
           "Type": "",
           "backup_ready": true,
           "charge_power_clamped": false,
           "disabled_reasons": [],
           "energy_charged": 21410,
           "energy_discharged": 950,
           "f_out": 60.016999999999996,
           "i_out": 6.800000000000001,
           "nominal_energy_remaining": 13755,
           "nominal_full_pack_energy": 13803,
           "off_grid": false,
           "p_out": -370,
           "pinv_grid_state": "Grid_Compliant",
           "pinv_state": "PINV_GridFollowing",
           "q_out": -10,
           "v_out": 243.60000000000002,
           "version": "b0ec24329c08e4",
           "vf_mode": false,
           "wobble_detected": false
       },
       {
           "OpSeqState": "Active",
           "PackagePartNumber": "3012170-10-B",
           "PackageSerialNumber": "TG122yyy", 
           "Type": "",
           "backup_ready": true,
           "charge_power_clamped": false,
           "disabled_reasons": [],
           "energy_charged": 20460,
           "energy_discharged": 1640,
           "f_out": 60.016000000000005,
           "i_out": 3.6,
           "nominal_energy_remaining": 13789,
           "nominal_full_pack_energy": 13816,
           "off_grid": false,
           "p_out": -210,
           "pinv_grid_state": "Grid_Compliant",
           "pinv_state": "PINV_GridFollowing",
           "q_out": 20,
           "v_out": 243.20000000000002,
           "version": "b0ec24329c08e4",
           "vf_mode": false,
           "wobble_detected": false
       }
   ],
   "battery_target_power": -706,
   "battery_target_reactive_power": 0,
   "blocks_controlled": 2,
   "can_reboot": "Yes",
   "command_source": "Configuration",
   "expected_energy_remaining": 0,
   "ffr_power_availability_high": 11658,
   "ffr_power_availability_low": 194,
   "grid_faults": [
       {
           "alert_is_fault": false,
           "alert_name": "PINV_a006_vfCheckUnderFrequency",
           "alert_raw": 432374469357469696,
           "decoded_alert": "[{\"name\":\"PINV_alertID\",\"value\":\"PINV_a006_vfCheckUnderFrequency\"},{\"name\":\"PINV_alertType\",\"value\":\"Warning\"},{\"name\":\"PINV_a006_frequency\",\"value\":58.97,\"units\":\"Hz\"}]",
           "ecu_package_part_number": "1081100-22-U",
           "ecu_package_serial_number": "CN321365D2U06J",
           "ecu_type": "TEPINV",
           "git_hash": "b0ec24329c08e4",
           "site_uid": "1232100-00-E--TG120325001C3D",
           "timestamp": 1645733844019
       }
   ],
   "grid_services_power": 0,
   "instantaneous_max_apparent_power": 30690,
   "instantaneous_max_charge_power": 14000,
   "instantaneous_max_discharge_power": 20000,
   "inverter_nominal_usable_power": 11700,
   "last_toggle_timestamp": "2022-02-22T08:18:22.51778899-07:00",
   "load_charge_constraint": 0,
   "max_apparent_power": 10000,
   "max_charge_power": 10000,
   "max_discharge_power": 10000,
   "max_power_energy_remaining": 0,
   "max_power_energy_to_be_charged": 0,
   "max_sustained_ramp_rate": 2512500,
   "nominal_energy_remaining": 27624,
   "nominal_full_pack_energy": 27668,
   "primary": true,
   "score": 10000,
   "smart_inv_delta_p": 0,
   "smart_inv_delta_q": 0,
   "solar_real_power_limit": -1,
   "system_island_state": "SystemGridConnected"
  }

• pw.battery_blocks(jsonformat=True)

  {  
     "TG122xxx": {
        "OpSeqState": "Active",
        "PackagePartNumber": "3012170-10-B",
        "THC_State": "THC_STATE_AUTONOMOUSCONTROL",
        "Type": "",
        "backup_ready": true,
        "charge_power_clamped": false,
        "disabled_reasons": [],
        "energy_charged": 21020,
        "energy_discharged": 880,
        "f_out": 60.016000000000005,
        "i_out": 2.7,
        "nominal_energy_remaining": 13812,
        "nominal_full_pack_energy": 13834,
        "off_grid": false,
        "p_out": -160,
        "pinv_grid_state": "Grid_Compliant",
        "pinv_state": "PINV_GridFollowing",
        "q_out": 20,
        "temperature": 21.799999999999997,
        "v_out": 243.9,
        "version": "b0ec24329c08e4",
        "vf_mode": false,
        "wobble_detected": false
     },
     "TG122yyy": {
        "OpSeqState": "Active",
        "PackagePartNumber": "3012170-10-B",
        "THC_State": "THC_STATE_AUTONOMOUSCONTROL",
        "Type": "",
        "backup_ready": true,
        "charge_power_clamped": false,
        "disabled_reasons": [],
        "energy_charged": 21020,
        "energy_discharged": 880,
        "f_out": 60.016000000000005,
        "i_out": 2.7,
        "nominal_energy_remaining": 13812,
        "nominal_full_pack_energy": 13834,
        "off_grid": false,
        "p_out": -160,
        "pinv_grid_state": "Grid_Compliant",
        "pinv_state": "PINV_GridFollowing",
        "q_out": 20,
        "temperature": 18.5,
        "v_out": 243.9,
        "version": "b0ec24329c08e4",
        "vf_mode": false,
        "wobble_detected": false
     }
  }

Firmware version of the Powerwall can be seen with pw.version().

Devices and Alerts will show up in the device vitals API (e.g. /api/device/vitals). Below are a list of the devices and alerts that I have seen. I'm looking for information on what these mean. Please submit an Issue or PR if you have more alerts or definitions we can add. The device details below are mostly educated guesses.

    import pypowerwall

    # Connect to Powerwall
    pw = pypowerwall.Powerwall(host,password,email,timezone)

    # Display Device Vitals
    print("Device Vitals:\n %s\n" % pw.vitals(True))

Example Output: here

• Details

  • This appears to be the primary control unit for the Tesla Energy Systems.
  • ECU Type is 207
  • Part Numbers: 1232100-XX-Y, 1152100-XX-Y, 1118431-xx-y
  • Tesla Gateway 1 (1118431-xx-y) or Tesla Gateway 2 (1232100-xx-y)
  • Tesla Backup Switch (1624171-xx-y)

• Alerts

  • BackfeedLimited - The system is configured for inadvertent export and therefore will not further discharge to respect this limit. It appears this controls backfeed before PTO, under the "Permission to Operate" option under the settings menu. Prior to PTO the backfeed rate is limited, as the system needs to produce over the load, but by the minimum possible. The system seems to regulate this by switching MCI's open/closed, to minimize the overage that must be backfed, as the power has to go somewhere, and at this point the batteries are 100%. This seems to toggle that setting per inverter.
  • BatteryBreakerOpen - Battery disabled via breaker
  • BatteryComms - Communication issue with Battery
  • BatteryFault - Powerwall Failure
  • BatteryUnexpectedPower - Commanded real power does not match measured power from battery meter.
  • CANUsageAlert - Unknown
  • DeviceShutdownRequested
  • ExcessiveVoltageDrop
  • FWUpdateFailed - Firmware Upgrade Failed
  • FWUpdateSucceeded - Firmware Upgrade Succeeded
  • GridCodesWrite - Unknown
  • GridCodesWriteError - Unknown
  • GridFaultContactorTrip
  • HighCPU - Occurs when too many API calls are made against the gateway especially with bad credentials
  • IslandingControllerMIA
  • OpticasterExe - See Opticaster
  • PanelMaxCurrentLimited
  • PodCommissionTimeError - Unknown but happened when some of the Powerwalls failed during a firmware upgrade and was disabled (see discussion)
  • PodCommissionTime - Unknown
  • PVInverterComms - Communication issue with Solar Inverter (abnormal)
  • RealPowerAvailableLimited - The command is greater than the Available Battery Real Charge or Discharge Power (seen when Powerwall 100% full). Seems related to BackfeedLimited.
  • RealPowerConfigLimited - The system is unable to meet the commanded power because a limit that was configured during commissioning
  • ScheduledIslandContactorOpen - Manually Disconnected from Grid (nominal)
  • SelfConsumptionReservedLimit - Battery reached reserve limit during self-consumption mode and switches to grid (nominal)
  • SiteMaxPowerLimited - Unknown
  • SiteMeterComms - Communication issue with Site Meter (abnormal)
  • SiteMinPowerLimited - Cannot meet command because the Site Minimum Power Limit has been set
  • SolarChargeOnlyLimited - The system has been configured to only charge from solar. Solar is not available, therefore the charge request cannot be met.
  • SolarMeterComms - Communication issue with Solar Meter (abnormal)
  • SolarRGMMeterComms - Communication issue with Solar Revenue Grade Meter (abnormal)
  • SystemConnectedToGrid - Connected successfully to Grid (nominal)
  • SystemShutdown
  • UnscheduledIslandContactorOpen
  • WaitForUserNoInvertersReady - Occurs during grid outage when battery shuts down more than once due to load or error. Requires user intervention to restart.

• Details

  • Appears to be controller for Powerwall/2/+ Systems
  • ECU Type is 224
  • Part 1092170-XX-Y (Powerwall 2)
  • Part 2012170-XX-Y (Powerwall 2.1)
  • Part 3012170-XX-Y (Powerwall +)

• Alerts

  • THC_w042_POD_MIA - Unknown (abnormal)
  • THC_w051_Thermal_Power_Req_Not_Met - Unknown but seen during firmware upgrade.
  • THC_w061_CAN_TX_FIFO_Overflow - Unknown (abnormal)
  • THC_w155_Backup_Genealogy_Updated - Unknown but seen during firmware upgrade.

• Details

  • Appears to be the Powerwall battery system (not sure of what POD stands for)
  • ECU Type is 226
  • Part 1081100-XX-Y
  • Component of TETHC

• Alerts

  • POD_f029_HW_CMA_OV
  • POD_f053_SW_CMA_Cell_MIA
  • POD_w017_SW_Batt_Volt_Sens_Irrational
  • POD_w024_HW_Fault_Asserted
  • POD_w029_HW_CMA_OV
  • POD_w031_SW_Brick_OV - It seems that the Brick warnings are related to preventing the condition where the powerwall doesn't have the minimum amount of power it needs to turn back on. When this happens, a third party charger is needed to get the powerwall back to it's minimum operating battery requirement to turn back on, or it's "bricked". Solar cannot return it to this state, because it needs power to make power.
  • POD_w041_SW_CMA_Comm_Integrity
  • POD_w044_SW_Brick_UV_Warning - see POD_w031_SW_Brick_OV
  • POD_w045_SW_Brick_OV_Warning - see POD_w031_SW_Brick_OV
  • POD_w048_SW_Cell_Voltage_Sens
  • POD_w049_SW_CMA_Voltage_Mismatch
  • POD_w058_SW_App_Boot - Possibly indicating autostart of a generator.
  • POD_w063_SW_SOC_Imbalance
  • POD_w064_SW_Brick_Low_Capacity - see POD_w031_SW_Brick_OV
  • POD_w067_SW_Not_Enough_Energy_Precharge
  • POD_w090_SW_SOC_Imbalance_Limit_Charge
  • POD_w093_SW_Charge_Request
  • POD_w105_SW_EOD
  • POD_w109_SW_Self_Test_Request_Not_Serviced - Unknown
  • POD_w110_SW_EOC - "End of Charge" This triggers when full backfeed starts and battery at 100%.

• Details

  • Appears to be the Powerwall Inverter for battery energy storage/release
  • ECU Type is 253
  • Part 1081100-XX-Y
  • Component of TETHC

• Alerts

  • PINV_a001_vfCheckPIIErrorHigh
  • PINV_a006_vfCheckUnderFrequency
  • PINV_a010_can_gtwMIA - Indicate that gateway/sync is MIA (seen during firmware upgrade reboot)
  • PINV_a011_can_podMIA - Unknown (abnormal)
  • PINV_a016_basicAcCheckUnderVoltage
  • PINV_a022_SwitchingBridgeIrrational - Reported during grid outage and on the transition back to grid.
  • PINV_a023_LossOfCurrentControl
  • PINV_a039_can_thcMIA - Seems to indicate that Home Controller is MIA (seen during firmware upgrade reboot)
  • PINV_a041_sensedGridDisturbance - Reported during "lights flickering" events and after "grid outage"
  • PINV_a043_gridResistanceTooHigh - Unknown (see jasonacox/Powerwall-Dashboard#323)
  • PINV_a047_BusCatcherActivated
  • PINV_a067_overvoltageNeutralChassis - Unknown (nominal)
  • PINV_a086_motorStarting

• Details

  • Tesla Backup Gateway includes a synchronizer constantly monitoring grid voltage and frequency to relay grid parameters to Tesla Powerwall during Backup to Grid-tied transition.
  • ECU Type is 259
  • Part 1493315-XX-Y
  • Component of TETHC

• Alerts

  • SYNC_a001_SW_App_Boot - Unknown
  • SYNC_a005_vfCheckUnderVoltage
  • SYNC_a020_LoadsDropped
  • SYNC_a030_Sitemaster_MIA
  • SYNC_a036_LoadsDroppedLong
  • SYNC_a038_DoOpenArguments - Request to disconnect from grid (nominal)
  • SYNC_a044_IslanderDisconnectWithin2s
  • SYNC_a046_DoCloseArguments - Request to join the grid (nominal)

• Details
  • Tesla Backup Switch is designed to simplify installation of your Powerwall system. It plugs into your meter socket panel, with the meter plugging directly into the Backup Switch. Within the Backup Switch housing, the contactor controls your system’s connection to the grid. The controller provides energy usage monitoring, providing you with precise, real-time data of your home’s energy consumption.
  • ECU Type is 300
  • Part 1624171-XX-E - Tesla Backup Switch (1624171-xx-y)

• Details

  • ECU Type is 296
  • Part 1534000-xx-y - 3.8kW
  • Part 1538000-xx-y - 7.6kW
  • Component of TETHC

• Alerts

  • PVAC_a014_PVS_disabled_relay - Happens during solar startup where PVS shows PVS_SelfTesting, PVS_SelfTestMci (nominal)
  • PVAC_a019_ambient_overtemperature - Temp warning (abnormal)
  • PVAC_a024_PVACrx_Command_mia - Unknown (abnormal)
  • PVAC_a025_PVS_Status_mia - Unknown (abnormal)
  • PVAC_a028_inv_K2_relay_welded
  • PVAC_a030_fan_faulted - Inverter fan failure (abnormal)
  • PVAC_a035_VFCheck_RoCoF - Unknown
  • PVAC_a041_excess_PV_clamp_triggered
  • PVAC_a043_fan_speed_mismatch_detected

• Details

  • ECU Type is 297
  • This terminates the Photovoltaic DC power strings
  • Component of PVAC
  • This includes the Tesla PV Rapid Shutdown MCI (“mid-circuit interrupter") devices which ensure that if one photovoltaic cell stops working, the others continue working.

• Alerts

  • PVS_a010_PvIsolationTotal
  • PVS_a0[17-20]_MciString[A-D] - This indicates a solar string (A, B, C or D) that is not connected.
  • PVS_a021_RapidShutdown
  • PVS_a026_Mci1PvVoltage
  • PVS_a027_Mci2PvVoltage
  • PVS_a031_Mci3PvVoltage
  • PVS_a032_Mci4PvVoltage
  • PVS_a036_PvArcLockout
  • PVS_a039_SelfTestRelayFault
  • PVS_a044_FaultStatePvStringSafety
  • PVS_a048_DcSensorIrrationalFault
  • PVS_a050_RelayCoilIrrationalWarning
  • PVS_a058_MciOpenOnFault
  • PVS_a059_MciOpen - "Mid-Circuit Interrupter" is open, this happens when there is not enough solar power to turn on the string, or the emergency shut down button is pressed. These are safety devices on the strings to turn them on and off.
  • PVS_a060_MciClose - "Mid-Circuit Interrupter" is closed, this is normal operation. An AC signal is sent from the inverter up the DC string triggering the MCI relay to close, allowing for DC solar production to start.

• Details
  • This is a third party (Generac) meter with Tesla proprietary firmware. It is generally installed as a wireless meter to report on solar production. Link
  • Component of STSTSM

• Details
  • This is used to describe attributes of the inverter, meters and others
  • Component of STSTSM

This is an unofficial list of terms that are seen in Powerwall responses and message.

• Site = Utility Grid
• Load = Home (think of it as the "load" that the battery or grid powers)
• instant_power = Current power (instant) - also called "true power" in wattage (W)
• instant_reactive_power = The dissipated power resulting from inductive and capacitive loads measured in volt-amperes reactive (VAR)
• instant_apparent_power = The combination of reactive and true power measure in volt-amperes (VA)
• energy_imported = kWh pulled from grid over a duration of time (since Powerwall commissioning it seems)
• energy_exported = kWh pushed to grid

• Tesla Powerwall 2 – Local Gateway API documentation – https://github.com/vloschiavo/powerwall2
• TESLA PowerWall 2 Security Shenanigans – https://github.com/hackerschoice/thc-tesla-powerwall2-hack
• Powerwall Monitoring – https://github.com/mihailescu2m/powerwall_monitor
• Protocol Buffers (protobuf) Basics - https://developers.google.com/protocol-buffers/docs/pythontutorial
• Tesla (tesla.proto) Research and Credit to @brianhealey
• Status Functions - Thanks to @wcwong for contribution: system_status(), battery_blocks(), grid_status()

• Python Tesla Powerwall API – https://github.com/jrester/tesla_powerwall
• GoTesla - go based Tesla API - https://github.com/bmah888/gotesla

If you wish to cite this project, please use:

@software{pyPowerwall,
  author = {Cox, Jason A.},
  title = {pyPowerwall: Python API for Tesla Powerwall and Solar Energy Data.},
  year = {2023},
  publisher = {GitHub},
  journal = {GitHub repository},
  howpublished = {\url{https://github.com/jasonacox/pypowerwall}},
}