Octopus IOG cheap rate charging

[appman999]

I used Mode Scheduler to set up Force Charge during the overnight cheap rate period (and occasionally charging the car in that period)
I'm sure that previously this maintained my battery at 100% through that period and the high loads I set up during that period ran straight from the grid.
However recently (maybe a Fox change?) it appears that Force Charge only charges to 100% and then returns to Self Mode which means the high loads come from the battery (I know I could possibly put in more ct clamps to stop this)
I tried running overnight on Backup mode but that doesn't charge the battery only holds its charge which after the evening usage is now about 80%.
Would it be OK to set the minimum SOC in Backup mode to 100% and thereby forcing the charge?

[MaterialBarracuda48]

Backup mode is to hold charge, so if you want it to be 100%, then program that in.

If you have LOTS of PV power, and a smallish export limit, then you can set your system to work in 'Feed-in' mode in the daytime, and it will then 'mop' up PV power that is above your export limit. That is to prevent clipping, or generally maximise your export to grid.

Depending on your house load/needs, then you may just run it as 'Self-use' mode during the daytime.


EDIT: Forgot to say, try not to have the battery sit at 100% for too long, not good for the long term health. You could have it set to 'Backup' mode for most of the night at 80% SoC, and for last hour have it top up to 100%?

[appman999]

Thanks for that, daytime isn't a problem. I'm able to export all my surplus.

Do you think force charge would hold it at 100% or once achieved revert to my default self use?

[daveg]

I find this a good explanation of the modes
https://github.com/TonyM1958/HA-FoxESS- ... des#backup

[appman999]

Thanks for that

[daveg]

My inverter is still meeting load from grid after it reaches battery charge target until the end of the force charge period. Then it goes to self use.
Possibly because I haven't applied firmware updates for a while.

[appman999]

Does your battery then maintain the charge target until the end of the force charge period?

[daveg]

Yes.
But if I go to create a new force charge period the words in the app imply that one will move self use after FCSoC is reached. So I stick with the one I've got.

[appman999]

I think you're probably right, as they say if it ain't broke ....
My work round is to use Backup for most of the off peak and then a short gentle charge to 100% before 05:30

[daveg]

I don't know if the situation you're finding is now the intended behaviour or an unintended consequence of a fix for the force discharge problem where it was drawing from the grid (at peak cost rates) when FDSoC battery target was reached before the end of the Force Discharge period.
The next round of firmware and app updates might clarify I guess.