Well, I'm certainly no expert. But i had read a lot on golf and tiguan forums about the steady red light appearing when the car is waiting for scheduled charging to start, and this correlating to flat batteries. There are too many reports of this for me to feel comfortable testing it and calling out VW rescue in the morning or having my alarm go off! I guess the issue potentially arises when the delay (hence red light and, presumably, 12v battery drain) is lengthy.
Set to max is an option that appears on my Ohme app when I plug in. Basically, it's just asking the charger to override any schedule and charge the car fully. When I do this, it then offers an option to switch to Smart mode - which picks up the off-peak schedule that I have set. Toggling it like this then turns off the charger so that no lights appear on the car's charge port after a minute or two, which I understand is how things should be when dormant, until charging starts at midnight. I'd set the golf's charge limit to 80% on the infotainment screen, and also on the Ohme app. I don't think there is anything else I can do via the infotainment screen - at least, until the long-awaited software "fix" to add scheduling becomes available.
Re charge rate - I seem to be getting around 7kw which is about where it should be with the Ohme home pro I think. Yours does seem low. It took 2 hr 35mins to add 17kw.
Ah I see - so you set the charger to go for a little while, so the car gets a little power, then back it off to wait until off-peak.
Hmmm - maybe I should worry about that red light then...
I had my Zappi fitted with some solar panels, and the Zappi has a feature where it can charge if there is spare solar power that would otherwise be exported. Not always the cheapest way based on the tariff I have, but I will sometimes do it if it's a sunny day and I want to max out the battery to 100% and then drive off soon afterwards (as I don't like to leave the battery at 100% for long periods).
But if I'm charging from solar, this does mean the car stops and starts charging based on eg when a cloud goes past. I will have to note more carefully if the charger goes red having had a short period of charge; but my bet would be that it does go red.
Thanks for the info on charge rate. Mine is consistently 4.5kW and I also had the same charging rate at a public AC charger (probably more expensive than petrol but I wanted to experiment with it), so I don't think it's a fault in my Zappi.
Perhaps that slow 4.5kW charge rate is more specific to my car (or perhaps all SEAT/Cupras) then...? It's a pain as while I have an off-peak electricity tariff at home, it's not enough hours at 4.5kW to fill the battery again after a long run where I've gone down to 0%.