Battery run to min Soc even over peak prices

springfall2008 / batpred

Home battery prediction and charging automation for Home Assistant, supporting many inverter types

https://springfall2008.github.io/batpred/

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Battery run to min Soc even over peak prices #1010

Open bensebborn opened 2 months ago

bensebborn commented 2 months ago

Noticed this a few times now. The plan looks fine then it recalculates and switches to a very strange plan where the battery just discharges to min Soc and stays there for hours

there’s an expensive period upcoming which is 8p more than the current price, but no charge is scheduled prior.

sometimes it also shows car charging in slots where the battery is discharging, which is disabled

If I turn expert mode off, the plan returns to normal. So guessing it must be an advanced option but unsure which one would do this (haven’t changed many advanced options, mainly just those recommended for agile tarrif)

Expected behavior

Battery charges when there’s a clear difference between current price and future peak price.

Predbat version

7.16.16

Environment details

Sunsynk 10k inverter 28.8kWh battery EV

Screenshots

Log file Can provide if needed. Currently on phone so not easy to access.

bensebborn commented 2 months ago

Expert mode off, normal

bensebborn commented 2 months ago

Have noticed this again today. Switching to/from expert mode mates no difference now

I had a decent plan which was estimating ending on approx £9. Then refreshed and the plan is £24!

Will attach logs shortly

gcoan commented 2 months ago

Yes that plan looks odd

Can you try upgrading to the latest version 7.17.3 and see if this improves things?

bensebborn commented 2 months ago

I’m using the Sunsynk branch so unfortunately can’t upgrade until those changes are merged in

bensebborn commented 2 months ago

Something I’ve noticed when this happens is all the prices are shown as red. So it doesn’t seem to be able to differentiate the cheaper slots. Maybe that’s why it’s not trying to charge?

springfall2008 commented 2 months ago

Now merged to 'main', can you test there please?

bensebborn commented 2 months ago

Thank you, will do

bensebborn commented 2 months ago

Thanks seems a lot better at first glance. I shall keep an eye as previously the plan did change quite drastically after a few runs, not sure why as the rates were the same and it was only about an hour later.

Screenshot for the same period:

Still a couple of cheaper slots that I would have expected a charge in (eg Sunday 21:30 + 22:30 @ 15p, with all slots 16-19p after? But it might well be doing something more intelligent than I can spot right now

Will keep you posted