Feat: add configurable EV stop strategy and stabilize peak shaving

[joma999]

This PR adds a configurable EV Stop Trigger strategy and improves peak-shaving stability.

Users can now choose whether an active EV stop trigger should force Full stop or keep the battery in Standby / peak shave. Manual Full stop from the main strategy selector still takes priority, so the battery can always be explicitly shut down.

The dashboard now reflects the actually applied strategy more accurately, including correct Standby / peak shave display instead of misleading internal Self-consumption variants.

Peak shaving now latches the import/export direction and limit when a real grid-limit violation occurs. This prevents import peak shaving from accidentally flipping into export behavior during the release/hold timeout after a load step change.

Changes

• Added EV Stop Trigger strategy selector.
• Updated Node-RED strategy selection priority.
• Fixed dashboard EV status and executing-flow display.
• Fixed Standby / peak shave display while it uses Self-consumption internally.
• Latched peak-shave direction and power limit during active peak shaving.
• Added low import peak-shave limit dashboard warning below 2500 W.
• Bumped version to 4.11.0.
• Added 4.11.0 release notes.

Validation

• Ran pwsh -NoProfile -File ./contribute/check.ps1.
• Result: ALL CHECKS PASSED.
• Verified JSON validity, node counts, version consistency, all-flows sync, and release notes section.

** Screenshots**

New option to select Standby / peak shave during EV stop tigger:

Now showing correct flow when selecting Standy / peak shave:

Example previous flipping behaviour during peak shaving when low limits were set:

Additional warning when setting very low peak shaving limits:

[nickles-lee]

I think it'd be good to also allow for:

• Charge PV mode... useful for people who are charging really slowly at 3.3kW (or a farmer with a mountain of panels???)
• Dynamic 2 w/ the "Regular" substrategy set to Charge-PV.

Considering the in-flight work for supporting per-phase peak-shaving/protection + most good EV chargers also having some form of phase protection, we might not want to block:

• Charging from the grid during the cheap hours, accepting that we might have limited headroom to do it within our 3x25A power budget
• Discharging to the grid during the expensive hours... If your car is actively charging during the two most expensive hours of the day, you probably don't mind using your batteries to defray the cost.

[joma999]

Thanks for your comments. I do have a few considerations, though.

First, when charging slowly—typically with a 10A charger—you may not want to enable this feature at all. After all, EV Stop is optional.

Second, when charging at full speed, which is typically 11 kW, I do not expect there to be much excess energy left for “Charge PV”, unless you have a very large PV installation.

Regarding charging the battery during low-price periods while also charging an EV: the 3×25A connection is indeed a limiting factor. I do not think you would want the charger to start load balancing simply because the battery is charging. In any case, charging your car during the most expensive hours of the day is generally not a good idea. I would expect HBC users to be proactive about that. ;-)

That said, I do think it would be useful to expand EV Stop with strategies beyond a full stop. My initial thought would be to introduce a standby mode. This could at least prevent dynamic load balancing from being triggered when, for example, you switch on the oven on the same phase.

For the rest, the strategy should make practical sense. Otherwise, leaving EV Stop disabled should remain an option.