On solar panels

But, and it’s a big but, times change.
• 1. There are newly announced government grants, available in England & Wales, to reduce the installation costs of solar panels. It’s only £400 but it’s a start.
• 2. We are now living with much higher fuel charges, which increase the savings brought about by installing solar panels.
•3. We are using more hot water than ever. The more we use, the more useful solar panels become, for they are quite capable of producing bucket loads of hot water when the sun shines. In fact, during the summer months, they produce far more hot water than you could realistically use. In the winter, things are rather different, but even if you assume that solar panels only contribute meaningful supplies of hot water for six months of the year, the economic calculus is turning in their favour.
So what do the calculations currently look like?
Roof mounted solar panels can supply you with an average of 300 litres of hot water each a day for maybe six months of the year, provided you have a big enough cylinder to store the hot water.
That 300litres requires 25kWh of heat to lift the temperature through 50°C.
• via a gas-fired boiler, this would cost 70p a day, potential saving £125/annum
• via an oil-fired boiler, this would cost £1.00p, potential saving £175/annum
• via an electric heat pump, this would cost 80p per day, potential saving £150/annum
This assumes that you would actually use 300litres of hot water every day during the summer. It’s a lot but it’s more or less what our family of five consumes so it’s not inconceivable.
What this means is that for the first time there is a payback on solar panels that is shorter than their lifespan, generally agreed at between 20 and 25 years. It’s still above that magic ten-year payback period at which financiers tend to get interested but, in the case of oil-fired systems, it’s not that far off. It would take another 25% hike in oil prices to make solar panels a gilt-edged investment, without any grant aid. You’d still need to be a fairly big water consumer and you’d need to have your hot water storage optimised, so it wouldn’t suit every household for sure. But it still represents a major sea change for the solar panel industry. If you take a view that energy prices will, say, double within the next twenty years — and oil has trebled in the past six — then solar panels are already a very solid investment.
PS The payback time on installing photovoltaic panels — the ones which produce electricity, rather than hot water — is still way longer than their anticipated lifespan.
Labels: Renewables
17 Comments:
This was in 2006. Fortunately, solar panel technology have gone a long way since that time. solar panels cost have gone down significantly since then.
Even if solar energy and solar panels has been around for a long time, it is still a fairly new technology. Also, unlike wind and hydroelectric energy, solar energy is difficult to harness. Eitherway, I still believe that in the future, the sun will be our primary source of green, renewable energy because our means to harness its power will become greater. Be one of the pioneers in solar energy technology. Start by getting a free quote from Solar Panels Info UK.
-BH
Nice blog, Thanks for sharing this blog. you did a great job. We are also provide free solar panel installation services in UK. Visit our site for more information.
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