So my utility has a really strange tiered usage pricing in the winter. I’m using home assistant to heavily track my actual rate and solar savings.
They charge like this:
0-100 kWh .10
101-800 kWh .07
801+ kWh .05
Flat rate .09
I’ve used home assistant to calculate the “real rate” I end up getting charged per kWh in a month. I can plug this into sense for the billing period using the ToU for the period. The consumption cost will match the bill.
The only problem is since solar will reduce the highest tier - the rate I export/reduce my bill is different from the average rate over the period.
In the screenshot from home assistant below I calculate:
Bill total consumption: what my bill would be under this model without solar
Bill net consumption: what my bill actually is.
Solar savings: The difference between total/net
Oppd current rate: the rate I am currently being charged in the period
Oppd real rate: the net total/kWh imported
Oppd production rate: The solar savings/kWh produced in the cycle.
So i can use the “real rate” and plug it into sense for a ToU rate, and get it to match my bill. However the solar production ends up using that same rate, which causes the cost to be about $20 higher.
Obviously I can track all of this outside sense to get an accurate representation of my bill/costs. But I like using sense’s app to quickly look over everything.
Adding a Solar rate to ToU would be helpful.