EstimEnergy

EstimEnergy is tool for monitoring and estimating energy usage and cost. It consists of a FastAPI backend that collects data from a device, an Angular frontend for configuration and a HACS enabled custom integration for Home Assistant that exposes the data via a sensor entity.

Installation

Create the following directories:

/path/to/appdata/estimenergy/config
/path/to/appdata/estimenergy/postgresql
/path/to/appdata/estimenergy/influxdb
/path/to/appdata/estimenergy/prometheus

Create a configuration file named config.yml in the config directory.

db:
  url: "postgresql://estimenergy:<db-password>@estimenergy-postgresql:5432/estimenergy?sslmode=disable"

influxdb:
  url: http://estimenergy-influxdb:8086
  org: estimenergy
  token: <influx-token>
  bucket: estimenergy

Now you can deploy the application stack using the example docker-compose configuration. Add mounting paths according to where you created the corresponding directories.

Using InfluxDB and Prometheus is optional. If you don't want to use InfluxDB, you need to remove the configuration from the config.yml file.

Postgres is also optional and can be replaced with any other SQL database including SQLite. If you want to use SQLite, you need to change to database URL in the config file to sqlite:////config/estimenergy.db. Using an external database is recommended, since the Grafana dashboard needs to access the database directly.

# docker-compose

services:
  estimenergy:
    # ...
    volumes:
      - /path/to/appdata/estimenergy/config:/config

  estimenergy-postgresql:
    # ...
    volumes:
      - /path/to/appdata/estimenergy/postgresql:/var/lib/postgresql/data

  estimenergy-influxdb:
    # ...
    volumes:
      - /path/to/appdata/estimenergy/influxdb:/var/lib/influxdb2

  estimenergy-prometheus:
    # ...
    volumes:
      - /path/to/appdata/estimenergy/prometheus:/prometheus

Now you should have EstimEnergy running on port 12321, a prometheus collector running at port 9090, InfluxDB at port 8086 and PostgreSQL at port 5432.

Prometheus will scrape the metrics exposed by EstimEnergy every 15 seconds and keep the data for five years or until 1TB of space is used. This can be configured using the --storage.tsdb.retention.time and --storage.tsdb.retention.size command options in the docker-compose file.

You should now be able to access the web UI at port 12321. You will have to create one or more devices and configure them using your energy contract data.

Home Assistant Integration

Install the repository in HACS via the custom repository option. After restarting Home Assistant you can add and configure the integration in the integrations UI. You need to provide the hostname or IP of the EstimEnergy docker container and the port on which it is running on.

This will create sensor entities for each collector and each metric that is being collected. You can use the Total Energy and Total Cost entities as data sources for the Home Assistant Energy Dashboard.

Specification

config.yml

option	type	description
db	dict	Database configuration
db.url	str	Database URL
influxdb	dict	InfluxDB configuration
influxdb.url	str	InfluxDB URL
influxdb.org	str	InfluxDB organization
influxdb.token	str	InfluxDB token

device

option	type	description
name	str	User defined name for the collector
host	str	The hostname or IP of the collector
port	int	The port of the collector
password	str	The password of the collector configured in ESPHome
cost_per_kwh	float	Money spent per kilowatt hour used
base_cost_per_month	float	Usage independent cost per month
payment_per_month	float	Money prepaid per month
billing_month	int	Month in which the billing period begins
min_accuracy	float	Minimum accuracy required to avoid estimating the month or day