Profit from backyard 'green power'

By MoneyWeek editor-in-chief Merryn Somerset Webb Mar 31, 2010

Merryn Somerset-Webb

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In 1958, Chairman Mao set China's steel production target for the year at 10.7m tons. It wasn't long before it became perfectly clear that the country did not have a hope of meeting it – however flat out he demanded that its mills and mines should work.

So Mao roped in the general population with his "backyard furnace" plan. This forced millions of already exceptionally miserable peasants to build mini-furnaces in their villages and chuck in every piece of metal they had – from wheels to door handles – in a desperate effort to meet their mad dictator's need to  "overtake America".

It was, of course, a total disaster. It wasted man-hours (which, given the ongoing famine, could have been better used in the fields). It melted down millions of perfectly good cooking pots. And while the target was eventually hit, as Jung Chang and  Jon Halliday point out in their stupendous biography Mao: The Unknown Story (Vintage), even he admitted that only 40% of the steel was of any quality at all.

All in all, the scheme represented a depressingly massive misallocation of resources in the name of meeting an entirely arbitrary target.

Does this sound familiar to you? Reading the section on the idiocy of it all in Chang and Halliday's book, I suddenly realised why it did to me: renewable energy.

Here in the UK, we have a target, too. We have committed to generating 15% of our electricity from renewable sources by 2020. Right now, we generate 4% of our electricity from renewable sources.

Given that we haven't long to go, that might make you think that we haven't a hope of meeting our target. But that's probably because you haven't taken account of Britain's backyard electricity generation plant plan.

From the beginning of next month, householders will be bribed via the feed-in tariff plan to help the government meet its target by installing some kind of renewable energy production capacity at home – be it a mini-wind turbine or a roof full of solar panels.

This won't do much for the nation in the end – all the evidence is that small turbines and home solar panels are a ludicrously inefficient and expensive way to produce energy (see www.monbiot.com for the evidence on this) and the bribes will have to be paid for by everyone via their taxes and energy bills.

But while micro-power generation might misallocate resources in a macro sense, it could really work out for anyone who has the cash to buy a few solar panels.

The electricity you buy from your energy company at the moment comes in at around 10p per kWh. But fit a "typical" photovoltaic solar system to your roof and you'll get paid 41.3p per kWh for it. Fit up your own little hydro plant, and you'll get around 20p per kWh. Go for wind, and you'll get up to 34.5p.

There's more. That's just the price you get for the electricity you use yourself. If you have any left over and export it to the grid (the energy companies have to buy it), then you'll get another 3p per kWh. Not that anyone will actually measure how much you export. Instead, in the beginning at least, to save the bother and cost of installing meters, this  will just be "estimated", which will be helpful for anyone not actually exporting any.

Overall, says the Department of Energy and Climate Change, anyone installing a "well-sited" 2.5kW solar panel at a cost of around £12,500 is likely to earn £900 and  get around £140 a year off their electricity bill from it.

And you won't just get this money for a year. You'll get it for up to 25 years (depending on which technology you install).

It will also be index-linked – so your payments will rise every year along with inflation. And, absolutely best of all, for those of us still reeling from the small print of the Budget, it will be entirely tax-free.

So should you start looking into it?

Immediately. But there are risks. Each government should keep the long-term promises of previous governments but, given the state of the UK's public finances, all bets on that are probably off for the next few years.

Then there is the fact that you are risking your capital. Put your money in a savings account and you at least get it back when you want it. Use it to buy a wind turbine and you might not. Sure, a £5,000 turbine and its attached subsidies should add value to your house, should you sell it, particularly given the flow of income it should be offering. But again, given the volatility of our economy, that's not a given.

Still, look at the numbers and the deals look good even so. Let's say you've gone down the pricey solar panel route. You get back your £1,040. You pop that in a savings account every year at an annual 3%. After ten years, you'll have £12,300 and  a few second-hand solar panels.

So you'll be a little ahead (by the value of the panels, such as that may be). But you'll still have 15 years ahead of you during which you will be making a real tax-free return of 8% or so a year. Makes you wonder why you'd bother with an Isa this year, doesn't it?

• This article was first published in the Financial Times

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  • 1. jerseylil

    (31 March 2010, 10:50AM)  Complain about this comment

    Your calculations are based on the price of electricity staying at current levels for the next 10 years. This is, by all accounts, very unlikely - so the savings would be even greater, and inexcess of 8% for the remaining 15 years. We have had solar pv panels since last October and are very impressed by their performance, even in dull weather.

    Another incidental 'plus' is that having solar panels makes you much more aware of the electricity you are using!

  • 2. Rupert Armstrong Evans

    (31 March 2010, 11:07AM)  Complain about this comment

    The new 'Feed-In Tariffs' may work to solar and small scale wind power with their mass produced identical panels, but they will be a total disaster for the bespoke small hydro industry in the UK and anyone who wants to develop new ideas in any of the renewable energy sectors such as biomass and water source heat-pumps. Going back to Chairman Mao, he may have said "may a thousand flowers bloom", but all the Government is creating is "blooming paperwork!"

  • 3. Dave O'Carroll

    (31 March 2010, 11:37AM)  Complain about this comment

    Don't you just love it when Merryn writes yet another tongue in cheek article, laced with heavy dollops of irony that manages to obsfucate some to the point of completely missing the point.

    Shame I'm married really. Oh and her of course;-) Then there's the age difference, not that it matters, not these days. It's my human right afterall, as someone older not to be treated as someone older.

  • 4. Dave O'Carroll

    (31 March 2010, 11:40AM)  Complain about this comment

    I meant obfuscate obviously, it's an age thing!

  • 5. Ian Chapple

    (31 March 2010, 11:42AM)  Complain about this comment

    This is another demonstration of the technical illiteracy of this government and its advisors. Beware that what can be given in ignorance can be taken in knowledge. Solar pv is not viable and neither is small scale windpower. If we want the lights to stay on we should shout down the doubters and get on with nuclear asap.

  • 6. David Clarke

    (31 March 2010, 12:07PM)  Complain about this comment

    Who makes the solar panels? Is that an investment opportunity?

  • 7. Grant Ozolins

    (31 March 2010, 12:21PM)  Complain about this comment

    @Ian Chapple: given that solar PV technology is advancing rapidly - for example thin film solar is rapidly bringing down the cost of solar PV toward 50cents / watt and reducing the energy cost of the PV modules themselves - to make the blanket statement that "solar PV is not viable" is misleading if not outright untrue.

  • 8. IW

    (31 March 2010, 01:17PM)  Complain about this comment

    The arguments in favour of installing solar panels or wind turbines look good unless equipment lifetimes are not good. In the solar panel case returns could easily be negative if replacement is needed soon after 10 years. In addition there may be maintenance costs to take into account. What is the considered opinion on this issue?

  • 9. Andrew Dobbing

    (31 March 2010, 01:28PM)  Complain about this comment

    Perhaps not so relevant on a money making forum, but purely from an emissions viewpoint all these local generation systems, be they solar, ground source pumps, wind and even gas fuelled combined heat and power systems, must have some benefit as I believe the distribution of electricity to homes is about 40% efficient, so loads of energy is lost between generation and consumption.

  • 10. David

    (31 March 2010, 01:29PM)  Complain about this comment

    Please, please, please can we start seeing what the energy ratios are on these technologies to know if they are viable or not. Just because the technology may not be viable now, doesn't mean it won't be in the future.

    Another thought is that this scheme could be about job creation. I read that it's created million jobs in Germany, but don't know how they got to this figure.

    Is nuclear viable? Where's all the uranium coming from and the radiactive waste going to? What's the energy ratio with Nuclear?

  • 11. D.Somers

    (31 March 2010, 01:38PM)  Complain about this comment

    Merryn hit the nail on the head with the comparison to Chinese efforts to increase steel production in the 1950s.
    Feed in tariffs are a twenty first century mix of the most toxic elements of socialism and capitalism,. FIT will divert resources away from new innovation into old technologies, that never took off because they were not cost effective.
    The price for this folly will be a heap of debt, a mountain of scrap and a dearth of electricity.

  • 12. Stephen Lewis

    (31 March 2010, 01:52PM)  Complain about this comment

    I thought the bribes to be paid to DIY electricity producers were economic madness & were designed specifically to distract the voters from the government's 10-year failure to face up to the UK's desperate need to build more power plants. Our population is growing, our older power plants are being decommissioned.
    But then I wondered: how does the cost compare with building & running a new nuclear power station?

  • 13. jerseylil

    (31 March 2010, 02:01PM)  Complain about this comment

    It would be interesting to know what people's qualifications for pontificating on this subject are, if they are to be given any credence whatever.

  • 14. Brian Gregson

    (31 March 2010, 04:11PM)  Complain about this comment

    I have a supplier's meter which shows Economy 7 day and night readings and feed-in as well. These are all on my bill.
    Installing storage heaters has reduced gas consumption for central heating, and are cheaper to run.
    Before too long I hope to have a plug-in electric car, which with some management and luck will run mainly on free fuel.
    No government money is involved, as with their usual low cunning the whole cost is now born by electricity users, so if you are going to pay for it anyway why not get involved?
    A good way is needed of financing it for those without the necessary capital.



  • 15. andy

    (31 March 2010, 08:51PM)  Complain about this comment

    As someone who has solar tubes on my roof to heat my water maybe I can add some input. I managed to get one of the old Clear skies grants towards it installation but whenever dealing with any government body the hassle and time wasted has to be taken into account. These tubes allow my boiler to be switched off virtually 7 months of the year. The winter months the boiler is "helped" by partially heated water. The water heats during the day and I have often wondered " What can PV possibly provide for domestic users in mid June?" Possibly run your fan and fridge! What you are really acheiving with PV is using your money to subsidise the grid. Then to get these feed in tarriffs more money spent and endless paperwork and hassle is required to connect in. Solar hot water works while you are at work and is there for you when you return home. It saves YOU money and cuts the government and power suppliers out of the equation.

  • 16. Tony Owen-Conway

    (01 April 2010, 06:22PM)  Complain about this comment

    About 10-15 years ago I purchased a solar-heating tubes system. The cost was about £4000 and we were assured that a material benefit was achieved without direct sunlight. The system required the water temperature to be raised to 50 degrees in the separate water tank, before this was switched into use. In practice, without 2-3 hours of direct sunlight in a day the water never reached the required temperature and all it did was marginally raise the temperature of water which was then heated by by oil or electicity. Despite claims, and presumably improved systems, I would never again spend money on solar heating in this country.

  • 17. Andy

    (01 April 2010, 07:43PM)  Complain about this comment

    Tony, I dont want to get into techie debate about solar water but modern systems use a single twin coil water tank so even winter heated water is of benefit. My friend fitted his own and to save money skipped the control panel with a thermostat. His wife scalded herself having a shower few weeks afer installation! He went to a tip and used a discarded radiator to "dump" his excess heat after that. Most energy companies will charge 2.5 - 3k for a pro installation. Dont pay more you will never recoup it. I read that with a properly insulated home solar water can add 9% to value of house. source.The Guardian

  • 18. McGill

    (03 April 2010, 12:36AM)  Complain about this comment

    The calculations are also based on a very expensive (£12,500 for a 2.5 kW) solar PV installation. The payback period is even shorter with a cheaper installation. There are many community based schemes and national co-ops springing up to make the whole process much easier and cheaper for the average person to do, and most are either not-for-profit or some form of community ownership. www.smartenergy.coop is one example and a few Transition Towns have set up their own schemes, Merseyside, Cambridge, Belsize Park (London), Lewes, to name a few.

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