I can see that my Hot tub kicked in at 13:00 when the battery was at 50% and charging should have started from 1300. I would have expected the grid to start charging and heating the hot tub, but instead, the hot tub drained the battery to 31% at 1400. From there, the solar changed that battery, but nothing was added from the grid, so at 1600 the battery was only 55% not 100%
The battery normally gets to 100% in 3 hours from the mains, even if the hot tub cuts in.
