Summary: Tesla's Powerwall controller cannot handle 10 off grid batteries and sales should not of sold this system.
He is running beyond the scale of that Tesla's controller unit can really handle:
> Tesla soon worked out that the system was being overloaded due to having too many Powerwalls connected at once ... The gateway is being overloaded, reaching 100 per cent CPU and RAM usage. There’s too much info when they are all online.
He is doing something very uncommon among customers, and Tesla apparently doesn't even try to make it work:
> But while Tesla claims it can do off-grid 10-Powerwall setups, there are only a handful around the world – most are backed up by grid electricity, papering over any outages. ... “At the beginning there were actually only three 10-Powerwall installs in the world that were off-grid,”
They also apparently have poor support for off grid firmware updates, possibly related to the lack of CPU and memory to both keep the lights on and upgrade at once:
> “During these upgrade cycles, the system goes into this chaotic state that takes between four and eight hours, turning off and on 50 times,”
Somebody screwed up in the sales process then, either on the installer or vendor side. It's not acceptable to request a system in an unsupported configuration like this unless he was explicitly told beforehand "this isn't a supported configuration and we'll build it for you as long as you understand that".
A company I used to work for had an interesting solution to this.
There was an internal market, and all services used had to be paid for. Sales people could keep everything after paying the company a cut and all the costs of delivering what they promised the client.
So if they over promised to get a sale, it all came out of their personal profit. Seemed to work quite well.
I'm not clear on the details. It was over 30 years ago and I wasn't a salesman. I was busy automating their warehouse systems, but I'd see the brand new Porsches pulling into the car park!
The entire company was structured as a set of internal markets though. Never seen anyone else do this.
You’ve never worked for “that guy”? Because I have, several times. Some people get stupid when the checkbook comes out. In fact that’s a well known ploy by large effective companies. You can get misbehaving vendors to pay attention to you if you get out the checkbook or threaten to put it away.
He is running beyond the scale of that Tesla's controller unit can really handle:
> Tesla soon worked out that the system was being overloaded due to having too many Powerwalls connected at once ... The gateway is being overloaded, reaching 100 per cent CPU and RAM usage. There’s too much info when they are all online.
He is doing something very uncommon among customers, and Tesla apparently doesn't even try to make it work:
> But while Tesla claims it can do off-grid 10-Powerwall setups, there are only a handful around the world – most are backed up by grid electricity, papering over any outages. ... “At the beginning there were actually only three 10-Powerwall installs in the world that were off-grid,”
They also apparently have poor support for off grid firmware updates, possibly related to the lack of CPU and memory to both keep the lights on and upgrade at once:
> “During these upgrade cycles, the system goes into this chaotic state that takes between four and eight hours, turning off and on 50 times,”