stevebuk1
commented
2 months ago Its because your battery is at 92% at the start of the 15:00 slot, and 2300W is enough to get it to 100% in that 1/2 hour. This is shown by this part of the log:
14:10:00 INFO: >>> Slot: 23/08 14:00 UTC Factor: 1.000 Forced: 0W End SOC: 88.0% SPR: 4146W SCPA: 6000W SAC: 2301W Min Power: 2301W 14:10:00 INFO: 24/08 18:00 BST: 2.07 kWh at 51.95p. <==> 23/08 15:00 BST: -1.32p/kWh -2.74p SOC: 91.5%-> 88.0% New SOC: 91.5%->100.0% Net: 532.4
Its then held at 100% until 17:00 because its been worked out that letting it discharge at say 16:00 or 16:30 would then mean there would be insufficient battery to cover a later slot that costs more than 10p and then 17p. Holding at 100% for 16:00 to 16:30 covers off the 19:30 slot that would then would otherwise draw from grid at 21p, as shown by this part of the log:
14:10:02 INFO: >>> Slot: 23/08 15:00 UTC Factor: 1.000 Forced: 0W End SOC: 96.5% SPR: 1699W SCPA: 6000W SAC: 671W Min Power: 671W 14:10:02 INFO: 23/08 19:30 BST: 0.85 kWh at 16.02p. <==> 23/08 16:00 BST: 10.67p/kWh 9.06p SOC: 100.0%-> 96.5% New SOC: 100.0%->100.0% Net: 382.6
The slightly misleading part of the screengrab is that the inverter isnt actually drawing 2300W from grid for 15:00 to 17:00, its just doing it for the 1st half hour and then holding the battery at 100%.
v3.15.5
Have I set something up incorrectly, as I can't understand why the charging plan would not force max charge current during free/cheap periods? Instead it's showing a charge window into expensive time slots. I've turned off Use Solar option to test this out.
Would you expect it for force charge and hold charge 15:00-16:00?
main.log pv_opt.log
Thanks!