I have had a chance to study this and now understand that both the usage and solar yield parameters are for a 24 hour period. I am on Octopus Agile which generally has 2 three hours periods in each day in which the price is the lowest so, when the Agile prices were not very good, I was setting up 2 smart charge periods each day (which might not be what you were expecting when defining the smart charge algorithm). But that doesn't really matter as I have found that the afternoon charge period is pretty good at getting past the following morning peak before the solar cuts in and that the early morning charge period is allowing for some fine adjustment if I have used more (or less) energy than the prediction or that the solar yield for the following day changes significantly. I also like the fact that the charge current is adjusted down for each period which is much kinder to the batteries.
All in all I think it is working very well and the two charge schedules are allowing for the higher overnight usage when the dehumidifiers are running flat out (as they are at the moment as the humidity is so high in Bedfordshire having just had 160mm of rain in the last 2 days!)
This is now the set and forget setting I will use over the winter unless I get notified of Agile plunge pricing where I will enable the Agile charge windows appropriately.
