It’s taken over 5 minutes, but I have still only made it 12 seconds into the video (just got nbn satellite yay 
), so gave up on it. Solar + a Powerwall could certainly save $2-3K per year, but not just a Powerwall, unless you are fully cycling it each day - 6.4kWh from the battery, and your grid electricity costs in the order of $1/kWh or more!
365 days per year * 6.4kWh = 2336kWh/year. If your electricity is a more reasonable 30c/kWh, then it will only save $700/year at best if charged only from solar. More realistic is only averaging 80% depth of discharge each day, and if using off-peak electricity to top it up, savings of under $500/year.
10 year warranty, cost ~$10000, so it is not a viable money saving storage system yet.
I haven’t seen pricing on the Powerwall 2 yet, but I’m hoping with it I’ll see the long promised, but absent so far, reduction in cost of storage!
