With apologies to everyone for continuing somewhat off topic:
Basically xWren we've gone from bad to worse. On my Motorola G Play the app is unusable, even after a re-install, and on a Motorola G (not Play) it's slow but usable, often crashes.
Ongoing complaints to Tesla Europe now illicit the response "your phone is too old" rather than the previous mantra of "contact your phone manufacturer". The phones are in fact I believe only four years old, but in desperation I recently ordered a Samsung M22 which arrived yesterday, and in fairness it runs a lot better on that, although still not as fast as when I look at our neighbours' Solar Edge app.
I have told Tesla Europe in no uncertain terms that I am fed up with them refusing to pass my complaints on higher to America Head Office, and I am about to tell them that whilst the app DOES run better on a recent phone, that's no excuse for having such bloated software that it's too klutzy to run on a phone that is four years old. In addition I have told them that I am still not happy with
1) The lack of a customer-determined nightly charge level which can be set the evening before
2) The lack of a desktop computer version of the app
3) The lack of a calendar-type "go to" function on the app to allow one to look at the data for a specific day in the past without having to scroll through every intervening day, which on my Motorola can take a minute a day
I have also reminded them that single handed I've b*ggered up a lot of sales for them, by showing people the system and the app, and in doing so, whilst praising the hardware and the installation, explaining that if I had known how little control the app gives you, how unnecessarily bloated it is, etc etc I would never never NEVER have chosen a Tesla. I also explain to visitors that Tesla Europe refuse to allow me to discuss all this with someone in America who might be able to do something about it, and that in general I now realise that Musk is a complete control freak and doesn't trust his customers to understand their needs better than he can.
Fiinally, an interesting technical aside. This time last week an illegally over-height lorry traveling up the main road a couple of miles from us felled the overhead fibre connection between our small village and the larger village four miles away which houses the BT exchange. Later in the day BT had to also fell the 150 pair main analogue telephone cable as it had become a danger to traffic. I expected communications with Tesla via the app to be severed, as our installers INSISTED at nauseam that I HAD to provide an ethernet cable from fibre router to Powerwall Gateway, and it seemed fundamental to whether they would install, so of course I complied. However, the app continues to work (slowly on the old phones) as it did before we lost the BT line. So - being puzzled by this - I eliminated anything in the house that could be providing a bridge from Gateway to internet, including the 4G modem-router we're now dependent on for internet (which hadn't ever been paired with the Gateway), and eventually even running tests from a hundred yards away from the house to ensure that the Gateway wasn't somehow accessing the phone (with its 4G connection) direct, in order to use the latter to get a bridge back to Tesla HQ.
Anyway, long story short, it's clear that there is some sort of 3G/4G connection from the Gateway to the mobile phone network of which I - and I suspect lots of other people - are totally unaware. When I watched the installation I saw no sign of a SIM card on the giblets of the Gateway, and there was no point where the engineers were setting up a 3G/4G connection, just the ethernet one I had provided. I have contacted Tesla Europe asking them to explain how it is that the Powerwall is still communicating with them, but curiously enough I haven't had an answer, even though it's nearly a week since I posed the question. Another point to add to my list of dissatisfaction when I finally get to speak to someone in America, and I'm not going to let it rest, the Tesla system could be SO good and I could be singing its praises, but instead I've become the biggest critic of it, and making sure that people know how I feel.
The tangential moral of this story is that if your internet connection is important to you then a mains driven 4G modem router and a SIM card with lots of data on it is a must for when the fibre goes down. We're still off, and although we're told it'll be back on on Friday (so nine days without it) there is also an idea that it'll be off until 1st June, a down period of 20 days. I'm not blaming BT on this, they're faced with a complex repair which involves a road closure, something that always means a delay.