I’ve just implemented a sliding window in my energy management system for cheap hours to work with Tibber and aWATTar, the most popular dynamic tariff providers in Germany those are.
Now my flags (see post #1) aren’t computed per-day any more but forward-looking, i.e. they are set based on prices from <now> till as long as the info about forthcoming prices will last.
That should be overcoming the effect discussed here.
So now enforcing heat pump heating and EV charging will happen in the cheapest future hours (or barring during most expensive times).
Plus, I have incorporated a generic ‘catch up charging’ feature.
If consumption (+generation) forecast predicts that my (solar) battery is about to run dry the forthcoming night, I’m now charging it ahead of time when it’s the cheap hours.
It’s brand new so cannot share results yet but as preliminary info, here’s my tonight’s chart.
