However, every time I revisit the math, it never works out. Even if I purchase it myself, the payoff times are never less than around 17-20 years, depending on how aggressive I project the rise in electricity rates. Given that solar panels have a serviceable life about 20 years, it still isn't cost effective yet.
But I'm getting more and more optimistic that in the next few years, we'll reach a level where solar panels make sense.
By calculating my what my electricity bill would have been vs what it was, they have saved me more than their cost (at some point I should go back again and get exact numbers).
Its entirely unclear how much "additional" value they give the resale value of my house. It is clearly some, but I don't have a good way of knowing if it is $20,000 or more.
At the time we financed the purchase as part of a refinancing of the house, so we did know the interest cost for the money, we also went through the great Recession so in traditional financial analysis (the 'do nothing' option) we would have predicted our money would have had a better return than it actually did, although that didn't really change the math all that much.
So I can't see how you don't get it paid off in < 10 years these days. At this point I'm thinking of adding another string to offset the addition of an electric car.
Using this calculator, pick a zip code in the Peninsula, I put in a 4000 watt system, estimate my bill to be $200/month, assume 2.5% increase in electricity prices per year, and assume I pay in cash. This gives me a 15 year payback period. At $100/month, it's a 24 year payback period.
Step 1) Buy panels direct with mounts Step 2) Mount the panels yourself. They aren't super heavy, just fragile. The tricky part here is measuring and drilling the holes you need to get them secured to your roof properly. Or buying a slanted frame if you have a flat roof. Step 3) Hire a licensed electrician to wire them up.
That's pretty much it. Total cost for a 9kw system will run about 13-15k after the electrician. You'll get 30% (almost 4k) back in rebates bringing your total cost out somewhere around 10k. That's a 5-7 year payback for your average american home.
There are a number of online solar panel distributors that are reliable and have been in business for quite some time.
If you can install solar panels above the ceiling with enough space to keep the air flow, it can help you keep your house fresh and comfortable during the day. Specially in a hot and dry climate.
Many people in the bay area have expensive homes and cars. People do not think twice about over bidding 50-150K when buying a house. In fact, that's the only way to get one here, and that's what we did. Its also common to spend crazy amounts on home renovation.
Then people also get an expensive Tesla or some other car that costs 50K or more.
But far fewer people would rather spend the 25K on solar and see a guaranteed return of investment of 150-200$ a month for the next 20 years. And the energy cost is guaranteed to be the same per watt throughout that period.
Regardless of whether you buy or rent, you _have_ to pay a power bill. Mine regularly crossed 150$ a month while renting. And I will continue to have a power bill till I die (40-60 years?). Why not lock in the price for the next 20 years at least?
And as far as I remember, the ability to sell electricity back to the utility like PG&E isn't something that is guaranteed in the future. However, I could be wrong about this point.
Even after the scheme was amended its a nice little subsidy for richer people it's the poor sods on key/coin meters that are paying for this.
Sure, it is a tax dodge for rich middle class people, but if people could just keep their envy in check for the decade or two it is going to take to bring costs down and sustainability up, this is going to benefit a lot of people.
How else are we going to incentivise companies to develop better solar panels? Seriously, I really want to know.
We are seeing the same thing with the Tesla Model S in Norway right now. On one hand people dismiss electric cars because they are not yet as sustainable as we would like them to be. On the other hand they get their panties in a bunch because you can now buy a really good car (with amazing performance) at the same price as a regular car. In Norway the Model S costs ~550k NOK. A petrol-powered car with the same performance figures costs ~1,500k NOK -- nearly 1,000k NOK being taxes. (Interestingly, the Model S is the first electric car that many people would consider buying as their only car. So far, electric cars have been toys for people who can afford a second or third car, and who want to park for free and use the public transport lanes).
It is going to take a lot of development to make solar panels sustainable. The more of a market we can create for them, the quicker development will take place and the quicker they will become available to broader segments of consumers. And we'll just have to tolerate that to push the industry forward, we will have to dangle some incentives in front of those who are able to take part.
http://www.ted.com/talks/elon_musk_the_mind_behind_tesla_spa...
Did you not see the original 8% tax free return for 20 years I mentioned - the uk 10 year yield is currently 2.7%
Of course, those with the capital themselves are going to do better still, but that is the very nature of capitalism, hardly unique to this issue.
That is an oxymoron. By definition, middle class is in the middle, not rich.
I was going to make a point that the middle class, being in the middle of the income-population pyramid, are more wealthy than the average. Interestingly, in the UK at least, 71% are middle class, which spoils that [0].
[0] - http://britainthinks.com/sites/default/files/reports/Speakin...
- At current rates the Feed-in Tariff pays you 14.9p for every kWh you produce, whether you use it or not. The Feed-in Tariff is TAX FREE and RPI Linked.
- Export your excess electricity to the grid and earn an additional 4.6p/kWh.
It looks to me that coal is one of the cheapest forms of generating electricity there currently is. [1]
I should add that the Ontario program also demands a percentage of domestic content of installs as well, again trying to bootstrap a domestic industry rather than simply benefiting foreign manufacturers. As a result various solar manufacturing businesses have arisen here.
Some people may not want to buy from a company engaged in such vigorous tax avoidance.
My friend in Czech Republic is a software developer. He works from home and his house is not connected to grid. He has 12-volt house grid with dozen car batteries. His office has 2 LED screens. Everything is powered by solar energy, except once a week he runs a generator for one hour to do a laundry. Heating and cooking is done by solid fuels and gas. Investment into solar panels and grid was about 6000 euro.
A key under-discussed factor therein: making it work necessitates a deep change of lifestyle. 110v always-on >50 amp service normalizes comforts and conveniences ("OMG I have nothing to wear tomorrow" laundry, smooth-top electric stoves 'cuz they look nice, no concern about peak usage, weather awareness, gratuitous A/C usage, vast non-12v product availability, etc.), and most people really don't want to give that up. I grew up on wood heat & other off-grid norms in a cold climate; much later in life I realized that what I considered normal and pleasant, most [sub]urbanites recoil from in horror.
I don't own a toaster, dryer, kettle, microwave or massive television. I have LED lighting everywhere as well and have programmed my family to turn the lights off.
3 children, 2 adults, 2 guinea pigs = £230 a year in electricity!
Not bad for a tech family.
only problem is losses associated with 12v wiring.
I probably don't have to fish out €6000 either for my needs.
Examples of such a provider and the plans: http://www.greenmountain.com/texas-oncor
Seems to me that these solar panels are designed to generate government subsidies more than anything else...
Market competition in energy is arguably more about access to capital than consumer choice. Currently individuals provide most of the money through tax and bills but only large energy companies can easily access the resulting capital. It is wrong to criticize individuals for wanting access to this money.
I just built an office which has 4x3m of roof on which I could easily put panels (fit them myself, I don't need someone to do that). But the cost of the inverter has put me off, and there doesn't seem to be any alternative way to power computers from it. Ideally I'd have a battery and 12V supply just to power the computers and gadgets, I don't need full mains voltage, nor do I need to feed back into the grid.
Some LED displays also have an external power brick - if that's 12V then you can wire them to your grid. Unfortunately most of them will have higher voltage to reduce wire costs and losses.
If you can replace at least part of the AC power with 12V DC power, you can then buy a lower power (cheaper) inverter for the AC power.
Just remember if you are running 12-volt DC, it requires fairly thick wiring to get the same current as you would with 120 volt AC.
With the exchange rate at 1.62 USD to the GBP, I can't imagine how they got that dollar figure. Remember that UK prices include sales tax @20%, so that puts the retail price at about USD$7000 pre-tax.
Solar panels are charged only 5% VAT, not 20%.
IKEA has a knack for packaging things in such a way that works for people.
Tend to go for non chipboard and non UV sensitive plastic stuff now that you can actually clean and leave in the sun without destroying it.
Chinese mining has a lousy safety record, even for a dangerous industry. (15 people PER DAY dying just from volatile gases, in 2010) Anything that offloads electricity generation from dangerous mining for coal powered stations is a good thing for China. So I'm not sure why they're not just putting these solar panels on every roof.
(http://www.wvcoalmining.com/coal-news/reducing-chinese-coal-...)
(http://www.mining.com/coal-mining-deaths-in-china-lead-to-mo...)
(http://www.scanimetrics.com/condition-monitoring-news/13-equ...)
Do something about the labor and permitting costs of a solar install in the developed world and I'll actually be impressed.