This is good!
First, I have been in the market for solar past 2 months and just signed with Tesla this past Friday for 8kW+2PW in Az on SRP. I have the right to cancel for 3 days. Without crunching numbers, something tells me I should stay the course because Solar (vs solar + powerwall) is where the ROI is in Arizona. It's the PW that pulls down the ROI, but you need at least one PW to avoid peak demand completely, maybe 2 depending. FYI, more on SRP in Az and solar is here.
Arizona Powerwall Installs
So this new offering might not be better for us because we already saw the numbers and why it makes so much sense to get solar. But for most, it still isn't moving the needle and the Fed Rebates are tapering rather quickly with 30% now, 26% in 2020... then 10%... 0% in years following. Until today, I've been trying to figure out what would get people to make the leap, because if not now then when? Why are there so many naked roofs in Arizona when we have 30% more avail solar energy than the average State?
So I started telling my neighbors about the ROI of solar (plus a $3,600 rebate on the first PW from SRP), and "they'll look into it" is what I heard most. Then I kept hearing "what if I move?" Aha! There's the snag. I think people want to keep options open and feel like they need to live there for 20 yrs before it pays for itself (which isn't true but they think so still).
So this new offer is removing that last barrier to going solar. People will run numbers and may even sign up on a hunch (not a big commitment, just a disconnection charge of $1,500 to remove them and they're used to that model with phone or similar contracts). When they do sign on, a few months in, they will realize they should have even rented a bigger array of panels. Watch.
Also, notice the kW ratings are under the normal values for a 4, 8, or 12kW ratings. So either they are switching panel technologies, or more likely they are dialing back the committed power like they do on the cars. This way, the same system could be removed and reinstalled on another roof and I doubt the fine print says anything about new solar vs used. The first signers will be pleasantly surprised that the output is higher than quoted - but this is all my speculation here.
Upshot is this will pull in more customers AND this represents a new revenue stream for Tesla. But time is ticking on the rebates and the planet... tick-tock, tick-tock.