One of the best things about this tech is how effective it is at domestic scale. My small roof in London generated 26kWh of electricity today. About 3X what we consumed.
Assuming that you have some leeway to pay your mortgage off quicker (depending on your exact terms).
Atleast where I live a standard 25 year mortgage can be paid off in ~10 if you were to double up your payments, because all of the additional money you're paying comes off the principal. Thus, the non-interest portion of the payment has _more than_ doubled.
What about on-site battery?
In any case, $15k is still a bit too steep for me, not because I can't afford it but because I want something that'll pay for itself in less than 5 years. My electricity bill is about $150/mo. so a solar roof doesn't make sense financially, even if I'm able to sell the excess to the grid.
Typical systems don’t have a battery, nor do they need one.
The grid is used as the battery.
An off-grid solar installation is significantly more expensive.
At least as of last fall, it was roughly $3/watt for solar installs - before incentives. Right now TSLA advertises about $2.2/watt, which is by far cheaper than anyone else.
If so, at 9.4 kW / 55 kWh per day, I would bloody hope you are exporting to the grid. That is an extreme amount of energy for a single family.
Last summer NorCal had some nasty heatwaves come through, with lots of "red flag" warnings. High winds, high heats. We had multiple days of 110F+. On those days we used more than 55kwh/day.
That being said, the game with solar is that of averages. Right now we're making a lot and exporting a lot. When the summer heats up, we'll be making even more power, but not exporting as much. In winter time we generally need more from the grid than we make.
Hopefully at the end of the year, we'll be near zero net.
You are miles ahead of the curve. However, where the pacific northwest, midwest, and east are concerned about energy, Arizona is concerned about water.
As my friend used to say, "nobody gets it all."
I wonder how much would it cost now?
So that means I could, theoretically move to a remote or desert location, somehow install a solar panel myself, set a Starlink Internet, and live happily ever after? Assuming I could somehow grow potatoes in a small green house.
Edit: Missing Drinking Water and Sewage treatment.
A single panel in part shade tends to produce a lot less than the fraction still exposed to sunlight, but I believe recent advancements in panel tech has made this less of an issue.
Ultimately, situating the panels in areas where, barring cloud cover, they will receive full direct sunlight is always the optimum approach.