They'd actually make economic sense where I live, the only thing that's held me from pulling the trigger is that I want to time it with when I need to have the roof inspected/replaced.
I'm aware of the arguments about how it can be that much cheaper when deployed at mass centralized scale rather than decentralized across a bunch of rooftops, however the way the electric markets are prices is based primarily on the cost to produce the marginal supply, which is usually gas.
So while the power company might flood a bunch of solar panels trying to capture the profit between cost to generate solar vs. cost to generate using gas, those profits haven't been lowering electric costs at residential rates. If anything those costs are still climbing.
It's actually not hard to get rooftop solar to pencil out in that situation, especially if you assume even moderate growth in future electricity rates or inflation. In my own tracker it would even be superior to paying down additional principle on my home mortgage!
Admittedly it would be less of a slam dunk if the net metering was less generous around here as you'd basically be required to add battery to the mix if you weren't already. But even that just prolongs the time to payoff, it still ends up having good ROI economically speaking.
Honestly they only made economic sense in my case because of government incentives. Although if the price continues to fall, they may eventually even make sense in my area without incentives.
Electricity generation in the event of a power outage was another consideration for me.
But yeah as a techy I also just enjoy having them.
I'm not regurgitating anything. I'm looking at how much electricity my panels generate, and what percentage of it I use, and I can say definitively that it would not make financial sense for me if not for the feed-in tariff program that pays me a guaranteed rate for electricity I sell back to the grid.
You can't just blindly say "PVs save you money". It matters very much how much sunlight you get, the orientation of your roof, how much electricity costs, how much labor and installation costs, etc.
My location is far from ideal for solar. But with incentives - which are funded in my country via a per-kWh surcharge on everyone's electricity bills - it just barely makes financial sense to have solar panels on my roof.
Unless you have very cheap grid power / terrible sun / needlessly high installation costs, PV will be a winner. So Quebec is bad because electricity is absurdly cheap, and the only benefit is redundancy. California should be absurdly cheap but regulations are out of control. Germany also has insane regulatory burden and expensive labour but grid energy is even more expensive, double the US average.
In very sunny places with expensive grid power a battery is sensible, but again politics often favours flat rate tariffs that discount peak power, which again favours grid incumbents.
So it might not be economic for your region but that is entirely due to regional politics, a default choice to make PV power expensive.
Ok so you've backpedaled from "PVs always save you money" to "if it doesn't, it's because of politics".
The reality is not that simple. PVs are definitely the cheapest source of energy in a lot of places, which is why it is the fastest growing energy source in the world. But "cheapest in a lot of places" is not the same thing as "universally a winner in every scenario". Politics can be a complicating factor, but in other cases the math just doesn't work out due to plain old physics and economics.
I'm extremely optimistic about the future of solar. But I don't think it helps the argument to pretend that it's already a guaranteed win everywhere if not for foolish politicians. That's just swapping one oversimplification for another.
I wish that were true, but I suspect more people are doing it to be trendy/appear "green" than basing it on a system lifetime ROI calculation vs. alternatives.
You should take this as a data point where your gut intuition has failed you.
It is really condescending to dismiss their choice as motivated by vanity rather than assuming that other people might have done their homework and made a rational decision. It might very well be that you have done your own homework and it doesn't make sense for your situation, but other people face different tradeoffs which make it worthwhile.
Maybe a better word would've been "status"? Rich people spend all kinds of money to show off how rich they are. They like to use "green" as a fig leaf so they can pretend it's not about status (e.g. $100K+ electric SUVs).
Can't possibly just be because they like those fancy SUVs.
I own an electric car (albeit not an SUV) that cost nearly that much and I can tell you that I didn't give a crap about status, and while the green part was a nice aspect, the main thing is just that I like the car a lot.
When people accuse others of buying something just because it's "green" it's usually actually a case where the thing is just actually good in some way, and the buyer likes it, but the accuser can't accept this. I lost a friend over this when I bought a Prius. It's a genuinely good car that was cheap to drive, but he could not get over his idea that I was a smug "green" asshole merely for owning one and liking the fuel efficiency.
You need only have read the HN front page 4 days ago to have seen one reason why 50,000 people may be motivated to get solar. Nothing trendy going on there, just poor regional planning.
Just looking into it for my house in the UK (read, not very sunny) and it'll pay for itself in around 6 years. Seems like a no brainer for a house I'm not planning on moving out of.
I'm not the one to whom you asked the question - I can think of plenty of things, but by and large most of the home things with ROI make the most sense to invest in when you're buying a new thing anyway - e.g. solar panels when you need a new roof, EV when you need a new car, ventless dryer when you need a new dryer, heat pump when you need new heating/AC, etc.
Off the top of my head the only thing that's really doable without replacing a depreciating asset are certain kinds of insulation upgrades. (And I guess potentially ceiling fan installs.)
