Solar panels, dynamic tariffs, domestic hot water and EV charging

[mstormi (Markus Storm)]

Bat holding is rare. But you can charge with zero W.

min/max SoC is not important, you can start/stop charging which you see they’re reached.

Trouble is, no vendor will be able to answer you if you ask him this.
You’ll have to research the internet.

[masipila (Markus Sipilä)]

@mstormi

Bat holding is rare. But you can charge with zero W.

I don’t quite follow. This would be a very typical scenario for me:

• I’m charging the EV from the grid when it’s cheap, there is no PV production.
• I do not want to drain the home battery to EV, I want to use the stored capacity for some other time.

[masipila (Markus Sipilä)]

@mstormi

Trouble is, no vendor will be able to answer you if you ask him this.
You’ll have to research the internet.

Yeah, I guess so. The good part here is that the different battery modes can be achieved with only a handful primitives:

• Battery discharging allowed: true / false
• Battery charging from grid allowed: true / false
• (for forcing the export to grid, I would also need force discharging: true / false)

@mstormi

min/max SoC is not important, you can start/stop charging which you see they’re reached.

Do you do this so that you monitor the SoC and control when charging from PV (or grid) will be stopped i.e. even if the battery would have a built-in mechanism for this, you override it and control it from openHAB? Kinda makes sense if you take over the whole management instead of adding an EMS layer on top of another layer…

Cheers,
Markus