One of my students, Griffin O’Neal-Freeman, figured out how we can export data from Home Assistant to a Google Docs. This provides a useful gateway for posting our Home Assistant data on the web. Below is a graph showing the daily electric use of the Guest House for the month of December. The graph should be updated daily.

The same graph for November is shown below.

This graph only includes electric energy — it does not include propane. The main reason is that we have to figure out the best way to graph propane and electric energy on the same scale. One possible method is to use Btu — but should this be site energy or source energy? I am leaning towards making a graph where energy cost is the common metric. The propane presently costs me $4.29/gal while the electric is close to $0.30/kWh. (This is an average cost as the cost formula is complicated, beginning with a large monthly fee for just having a connection.)

In the last week or so the energy used by the Rheem HW heater has increased. That is because I switched it from heat pump mode to resistive electric heat. In response to recent rains and elevated outside temperature I ran the dehumidifier in the crawl space. This will not normally be running when the outside temperature is below 40F.