I am pretty much a Solcast newbie, but am retrieving data for some days now (in order to optimise my battery management – up next ). I also send my actuals every hour, hoping for tuning to chime in in the (near) future.
One thing I am observing, though, is kind of an overall offset of the otherwise pretty accurate forecast (well, we’re having sunny days right now…). See the dotted line vs. the current actuals:
So it’s actually nicely fitting, except the slight constant offset. Also, my PV points straight south, so I’d expect the peak at solar noon. This would be 1.24 pm CEST for my place, but the forecast peaks at 1.34 pm. I double checked all my setup settings, but it looks all good. What could be the reason for this?