The Tesla Powerwall2 local server webpage can be found (in my case) on my LAN at https://192.168.1.137.
Refer to the LAN section of your router in order to find the correct address.
On the physical Tesla Gateway box there is a password printed on the device. Something like:
CN333725U6A1AAv
Use the last 5 characters from the above password STNFP in order to log in to Tesla's powerwall2
Energy Gateway LAN server:
This results in the following Tesla Energy Gateway webpage being displayed:
TESLA POWERWALL2 API JSON DATA
All of the above data shown can be accessed via the Tesla Powerwall2 API as I will illustrate below…
I based the below on the following excellent webpage: https://github.com/vloschiavo/powerwall2
GET POWERWALL2 API JSON DATA IN BROWSER
Now, via the web browser that you used to log into the Tesla system above,
you can easily grab the Tesla Powerwall2 JSON data relating to the percentage charge of the powerwall
battery/batteries:
• https://192.168.1.137/api/system_status/soe
{"percentage":61.88742549166577}
Useful JSON data such as the following can now be easily accessed via the below URL in the browser:
• The load instant power (the load that the house is drawing in watts),
• The solar instant power (incoming solar power in watts),
• The site instant power(amount you are exporting to the electricity grid in watts).
https://192.168.1.137/api/meters/aggregates
{
"site":{
"last_communication_time":"2022-03-22T11:57:11.746638557+01:00",
"instant_power":-5019,
"instant_reactive_power":-675,
"instant_apparent_power":675.1896030005202,
"frequency":0,
"energy_exported":361146.03577413695,
"energy_imported":2093286.3464779663,
"instant_average_voltage":426.13646018617084,
"instant_average_current":0,
"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",
"last_phase_energy_communication_time":"0001-01-01T00:00:00Z",
"timeout":1500000000,
"num_meters_aggregated":1,
"instant_total_current":0
},
"battery":{
"last_communication_time":"2022-03-22T11:57:11.761835772+01:00",
"instant_power":-5120,
"instant_reactive_power":90,
"instant_apparent_power":5120.790954530365,
"frequency":50.097,
"energy_exported":1580450,
"energy_imported":1819760,
"instant_average_voltage":242.3,
"instant_average_current":0,
"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",
"last_phase_energy_communication_time":"0001-01-01T00:00:00Z",
"timeout":1500000000,
"num_meters_aggregated":2,
"instant_total_current":0
},
"load":{
"last_communication_time":"2022-03-22T11:57:11.746638557+01:00",
instant_power":1597.5,
"instant_reactive_power":-600.5,
"instant_apparent_power":1706.6360186050217,
"frequency":0,
"energy_exported":0,
"energy_imported":2901298.7466677437,
"instant_average_voltage":426.13646018617084,
"instant_average_current":3.7487991506337734,
"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",
"last_phase_energy_communication_time":"0001-01-01T00:00:00Z",
"timeout":1500000000,
"instant_total_current":3.7487991506337734
},
"solar":{
"last_communication_time":"2022-03-22T11:57:11.80448197+01:00",
"instant_power":6708,
"instant_reactive_power":11,
"instant_apparent_power":6708.00901907563,
"frequency":0,
"energy_exported":1417869.389144842,
"energy_imported":9400.953180927841,
"instant_average_voltage":426.14223368886275,
"instant_average_current":0,
"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",
"last_phase_energy_communication_time":"0001-01-01T00:00:00Z",
"timeout":1500000000,
"num_meters_aggregated":1,
"instant_total_current":0
}
}
TESLA POWERWALL2 API JSON DATA VIA LOGGED IN BROWSER
CURL - GRAB TESLA POWERWALL2 API JSON DATA
Using curl, you can log into the Tesla Powerwall2 API and then access the Tesla API:
Create a login script called "login_script.sh""
[Enter your password and save something to a cookie file]
curl -s -k -c cookies.txt -X POST https://192.168.1.137/api/login/Basic -H "Content-Type: application/json" -d "{\"username\": \"customer\",\"email\": \"YourEmailAddress@xyz.com\",\"password\": \"STNFP\"}"
Create a script called "test_script.sh"
[This script perform the API request shown above in the web browser]
curl -k -b cookies.txt https://192.168.1.137/api/meters/aggregates
Create a script called "BatteryChargePercentage_script.sh" to get the current Tesla Powerwall2 battery charge percentage
curl -s -k -b cookies.txt https://192.168.1.137/api/system_status/soe
NODEJS CODE FOR TESLA POWERWALL2 TO GET BATTERY PERCENTAGE,
LOAD INSTANT POWER, SOLAR INSTANT POWER
/*
1. Test nodejs code to Log in to the Tesla Powerwall2 API
2. Callback ... After logging into Tesla Powerwall2 API. API call to get Solar, HouseConsumption, And Exporting power.
3. Callback ... After API call to get Solar, HouseConsumption, And Exporting power, get the Battery Charge Percentage
4. Callback ... After getting the Battery Charge Percentage, process the JSON data
*/
var Obj;
var IncomingSolarPower;
var HouseConsumption;
var ExportingToGrid;
var SolarSurplus;
var BatteryCharge;
function Login_Then_Do_API_Call() //Log In to Tesla
{
var exec = require('child_process').exec;
exec("sh login_script.sh", function(error, stdout, stderr) {
if (error) {
console.log('stderr: ' + stderr);
// node couldn't execute the command
return;
}
else
{
API_SolarHouseConsumptionAndExporting()
}
});
}
function API_SolarHouseConsumptionAndExporting() //Get loads of JSON data
{
var exec = require('child_process').exec;
exec("sh test_script.sh", function(error, stdout, stderr) {
if (error) {
console.log('stderr: ' + stderr);
// node couldn't execute the command
return;
}
else
{
Obj = JSON.parse(stdout);
IncomingSolarPower=Obj["solar"]["instant_power"];
HouseConsumption=Obj["load"]["instant_power"]
ExportingToGrid=Obj["site"]["instant_power"];
SolarSurplus=IncomingSolarPower-HouseConsumption
API_BatteryChargePercentage();
}
});
}
function API_BatteryChargePercentage()
{
var exec = require('child_process').exec;
exec("sh BatteryChargePercentage_script.sh", function(error, stdout, stderr) {
if (error) {
console.log('stderr: ' + stderr);
// node couldn't execute the command
return;
}
else
{
Extract_JSON(stdout)
}
});
}
function Extract_JSON(rawdata)
{
var tempobj = JSON.parse(rawdata);
BatteryCharge=tempobj["percentage"];
console.log();
console.log("-----------------------------------------------------------------------------------------------");
console.log('Incoming Solar (Solar Instant Power)........................... '+IncomingSolarPower+'W');
console.log('House consumption (Load Instant Power).......................... '+HouseConsumption+'W');
console.log('Exporting To Grid (site Instant Power).......................... '+ExportingToGrid+'W');
console.log('Tesla Battery Charge Level...................................... '+BatteryCharge+'%')
if(SolarSurplus>3000)
{
console.log('Solar Surplus (Incoming Solar - House Consumption)............. '+SolarSurplus+'W'+' [** I have >3000 watts of extra power **]')
TurnOnRelay();
}
else
{
console.log('Solar Surplus (Incoming Solar - House Consumprion)............. '+SolarSurplus+'W')
TurnOffRelay();
}
console.log("-----------------------------------------------------------------------------------------------");
console.log();
}
function TurnOnRelay(){console.log("Turning on Relay");}
function TurnOffRelay(){console.log("Turning off Relay");}
Login_Then_Do_API_Call();
EXAMPLE NODEJS CODE OUTPUT
TESLA POWERWALL2 NODEJS ASYNCHRONOUS CODE USING PROMISES
RATHER THAN CALLBACKS
var Obj;
var IncomingSolarPower;
var HouseConsumption;
var ExportingToGrid;
var IncommingSolarSurplus;
var BatteryCharge;
var SurplusEnergyThresholdInWatts=3000; //sufficient surplus for say 2 electric heaters
function execShellCommand(cmd) {
const exec = require('child_process').exec;
return new Promise((resolve, reject) => {
exec(cmd, (error, stdout, stderr) => {
if (error) {
console.warn(error);
}
resolve(stdout? stdout : stderr);
});
});
}
function TurnOnRelay(){console.log("Turning on Relay");}
function TurnOffRelay(){ console.log("Turning off Relay");}
async function TeslaAPI() {
var JSON_Data_From_API;
//1
console.log("Logging in to TeslaPowerWall2 API");
await execShellCommand('sh login_script.sh');
//2
console.log("Requesting API data for Incoming Solar power, House Consumption power, Exporting to grid...");
JSON_Data_From_API = await execShellCommand('sh test_script.sh');
Obj = JSON.parse(JSON_Data_From_API);
IncomingSolarPower=Obj["solar"]["instant_power"];
HouseConsumption=Obj["load"]["instant_power"]
ExportingToGrid=Obj["site"]["instant_power"];
IncomingSolarSurplus=IncomingSolarPower-HouseConsumption
//3
console.log("Requesting API data for Batteries...");
JSON_Data_From_API = await execShellCommand('sh BatteryChargePercentage_script.sh');
var tempobj = JSON.parse(JSON_Data_From_API);
BatteryCharge=tempobj["percentage"];
//4
console.log("Done. Here are the results:"); console.log();
console.log("-----------------------------------------------------------------------------------------------");
console.log('Incoming Solar (Solar Instant Power).................. '+IncomingSolarPower+'W');
console.log('House consumption (Load Instant Power)................. '+HouseConsumption+'W');
console.log('Exporting To Grid (site Instant Power)................. '+ExportingToGrid+'W');
console.log('Tesla Battery Charge Level............................. '+BatteryCharge+'%')
if(IncomingSolarSurplus>SurplusEnergyThresholdInWatts)
{
console.log('Solar Surplus (Incoming Solar - House Consumption).. '+IncomingSolarSurplus+'W'+' [** I have >'+SurplusEnergyThresholdInWatts+' watts of extra power **]')
TurnOnRelay();
}
else
{
console.log('Solar Surplus (Incoming Solar - House Consumption).. '+IncomingSolarSurplus+'W')
TurnOffRelay();
}
console.log("-----------------------------------------------------------------------------------------------"); console.log();
}
TeslaAPI();
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