Konnect

Home Assistant has an excellent system for monitoring energy usage/solar generation/grid usage/gas usage, etc.

One of the features is the ability to monitor specific devices, i.e., anything that can show electricity usage in kWh. We’ve been able to monitor many devices, like the fish tank, computers, etc., using plugs that can monitor power usage. However, many things are harder to measure, and it’s not economical to add monitors to everything in the house. This means that the gap between usage and monitored usage shows up as “Untracked consumption”.