Tesla Charger

Using excess solar charger from my solar setup with sungrow inverter to charge my tesla model y. It's very much experimental for now.

Setup

Create a tesla developer application

Go to Tesla Developer Dashboard and create a tesla application.

Set config and secrets

1. Copy example.env to .env
2. Modify .env and update all the credentials and config

Generate Refresh Tokens

This is needed to run vehicle commands on behalf of a certain tesla user. It's based on OAuth2.

1. Generate login URI

npm run cmd:generate-refresh-token

2. Login using tesla credentials

3. Copy the authorization code from the URI Example:

http://localhost:4321/tesla-charger?locale=en-US&code=NA_9e160ae8108f48287d1c28b40a410c4344ea3dc802483002a920bdf52dc2&state=xdfk76qcqysnf4s4rqhy&issuer=https%3A%2F%2Fauth.tesla.com%2Foauth2%2Fv3

4. Copy the value of the parameter code
5. Run generate-token again but with the code obtained in the last step like

npm run cmd:generate-refresh-token NA_9e160ae8108f48287d1c28b40a410c4344ea3dc802483002a920bdf52dc2

6. Obtain the value of refresh token in the JSON and paste the value of refresh token in .env like

TESLA_OAUTH2_REFRESH_TOKEN=NA_sdfgslitrvhnoweitunheroituhewrotiuehrmtylibuerhnyoilertuye

Pair Tesla app with the Tesla Charger (aka Third party application)

1. Call endpoint POST /api/1/partner_accounts in Tesla's fleet API and make sure all it's pre-requisites are met including

• Generating private-public key pair for using the tesla vehicle command sdk.
• Upload public key to .well-known directory under the required path.

2. Go to https://www.tesla.com/_ak/domain.com and follow the instructions

Setup Influx and Run SunGather to export data to influx

SunGather is a tool to Collect data from Sungrow Inverters and export data to various locations. For this project, you just need to setup SunGather to write two data points

• export_to_grid
• import_to_grid

In theory, you could easily use this without SunGather and for any inverters as long as you can find a way to write those two values in the configured bucket.

Running

npm run dev