A Lua script designed to scrape the System Statistics page published by Envoy-C gateways manufactured by Enphase in order to log the following data to InfluxDB for historical purposes:

• wattage/hour produced by the solar array
• number of inverters installed
• number of inverters online

The InfluxDB data can be visualized using a Grafana dashboard.

This script can be useful for off-grid systems without Internet access or for system owners who do not want to report their production statistics to Enphase.

• Enphase Envoy-C gateway
• cURL to query and post data
• Lua >= 5.2
• InfluxDB >= 1.2.0
• Grafana >= 4.2.0

• Create a database named 'solar' in InfluxDB
• Edit the script and update the site, envoyGW and influxDB variables with appropriate settings for your installation.
• Schedule the execution of the script every minute with 'cron', for example:

*/1 * * * * /home/foo/enphase-envoy/envoy.lua

• In Grafana, create a datasource named 'solar' pointing to the 'solar' database in InfluxDB, then import 'solar-dashboard.json' as a new dashboard.