The S&G blog
Friday,22 July 2011
Energy price rises and true potential income from renewable electricity

After all the bad news about the increases in energy prices from the big six (e.g. British Gas will increase their tariffs for gas by 18% and for electricity by 16% after 18 August 2011), and especially after reading many badly documented news articles which either promote solar energy or talked really badly about it, we thought it was about time to show you some values and how these energy price hikes are set to affect us all. At the same time we wanted to show you what opportunities exist by 'going green' and installing a renewable energy system at your house.

The current energy prices as stated by British Gas on their website today, considering both types of Tier tariffs and the Standard tariff, are 12p/kWh for electricity and 4p/kWh for gas. The British Gas website considers an average household with an annual consumption of 16,500kWh of gas and 3,300kWh of electricity. From our experience, this is more in line with the consumption of a small household (1 to 2 bedroom) in an area like Greater London with lower consumption values than national averages which will be more in the order of 4,000kWh per year for electricity and 20,000kWh per year for gas (from DTI energy trends).

After 18 August 2011, the average cost that British Gas has already announced will be around 14p/kWh for electricity and 5p/kWh for gas. If considering the average household previously mentioned and considering a standard fixed value for a year, we could see the following bills:

Before 18 August 2011 After 18 August 2011
Gas £768 £906
Electricity £468 £542

If considering a household like this installs a 2kWp solar PV system in the same region of Greater London, with an approximate total cost of £9,000 and even considering the inhabitants aren’t in the house most of the day and will only use 25% of the electricity generated by the PV system, this would be your income and savings:

Income source From generation of 1700kWh per year of a 2kWp PV system
Feed in tariff generation (1,700kWh X £0.433) £736
Export tariff (425kWh X £0.031) £13
Savings of not using 25% of the generated Energy (425kWh X £0.14) £59
Total Money and Savings: £808

If you get to consider that this household would be paying £542 per year after August 2011 for electricity alone, if investing in a PV system, the house would be receiving enough income to pay for the entire annual electricity bill and an extra income on top, all of this guaranteed for 25 years! We also need to keep in mind that the trend of energy prices is to increase, so all the savings you could make on your energy bills will be even greater in the future.

Yes all renewable energy systems represent a long term investment and you will probably see your money back after 10 or 11 years but you will be saving money for sure and doing your part in the battle against climate change and fossil fuels dependency of the UK.

Think about it! If this convinces you, just use the website or contact us, we can help you get the best option for your conversion to an eco friendly and smart house!

Posted by Mike at 14:12
Comments
1.
Anon
at
22:44 23/07/2011
British Gas's information on usage, presumably for UK households is interesting. With my rented 1980's house, since I cannot heat my water by gas, without heating all the radiators and wasting a lot of heat in unlagged pipes - through walls and at all bends and indeed under the loose fitting preformed polystyrene insulation that is clipped over pipes in the attic - I have to use my electric for hot water! Plus of course the house has a fan assisted oven using even more electricity - check this out in reality if you do not believe me! and electricity is used for the water pump every time that the gas central heating is turned on. This means that my gas usage in 2010 was well below 2MW, but my electricity was 5.5MW. Needless to say I am trying hard to use even less this year!

I am quite keen on trying to get folk to install both PV and Solar thermal panels, but the UK still has not got a grip on doing a good job, and I have had several door to door salesmen from local set-ups who in their ignorance have told me a load of 'porkies'. Set up the way they suggest, this is going to leave a lot of domestic systems not fulfilling anything like their rated capacity. In turn this will result in a lot of disgruntled customers, with only bad publicity to pass on. This is only one of several things that is adversely affecting installation of PV in the UK.
2.
Mike
at
21:21 27/07/2011
Reply to above comment: Your set-up for hot water and space heating is not an unusual one and shows that there is no such thing as a one size fits all approach when it comes to improvements to the energy efficiency of a house or investment in renewable heat solutions. There is certainly a trend towards the use of electricity to meet hot water and space heating needs, be that directly through efficient point of use water heaters, electric radiators or electric underfloor heating, or indirectly through the use of heat pumps. And if this electricity can be sourced effectively for free from local renewable energy sources, then we are on the road to achieving the use of sustainable distributed energy.

Your second point is very true indeed and our view on this has been addressed more fully in the blog 'New Which? Report - One year later, and the findings still the same: "dodgy sales tactics and giving poor advice" continue to predominate in the UK solar industry'
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