Investigate alternative solvers

[ekkea]

we are looking for:

• better performance, specifically better handling of binary variables
• proper multi-threading support
• model analytics in regards to complexity, precision ...
• ???

[t0mas]

Consider HiGHS https://highs.dev/ as one of the candidates.

While working on ways to translate the optimizer result to control actions I tested a few model variations with extra binary parameters and longer time series. CBC was significantly slower than HiGHS on those things. Haven't done a good documented comparison of the two solvers yet with the existing model.

[scruysberghs]

@t0mas How do you see "ways to translate the optimizer result to control actions"? Would that be a new charging mode "off, pv,min+pv, now, optimal) that allow you te set ev charging goals/plan but hands actual control to the optimiser result?

[andig]

Thats evcc-io/evcc#30834