How efficient is my home?

And occasionally some long-term saving, but one which offers a reward that only intensifies as your time in your home goes on?

There are many things you can do, little or large, that will reduce your home’s energy consumption, saving you money and helping to save the planet...

home energy saving infographic

Houses - especially older ones - are not watertight. They let the elements of the outside world in and cause temperature drops within your home. This means you’ll be using more energy to keep warm, whether it be hotter baths and showers or simply maintaining a feasible room temperature. However, this excess use of energy can be prevented, by undertaking a few alterations around the house.

Where to start? The roof!

The simplest task - the roof is where you should start. Similar to a human head, a roof can be responsible for 1/4 of heat loss from an un-insulated home. Laying down a layer of roof insulation can be as easy as putting on a hat and could cost you around £50 - the same price as some hats… After 5 years, this layer of roof insulation could save you £600 in energy expenses.

Wall insulation

Wall insulation tends to be a little trickier to manoeuvre, you’ll need to integrate it into the walls, but depending on what type of walls you have it can cost anything from filling cavities at £500 to £10,000 for external insulation, saving from £140 to £490 a year, respectively.


Windows are perhaps the easiest and most instantly rewarding way of energy-proofing your home. A blustery room is not a comfortable room, no matter how high your heating is, so invest in some double-glazing, energy efficient windows. You could save £170 a year on heating bills, and 680kg of CO2 - that’s not to mention the increased levels of peace and quiet.

But what’s the most efficient?

The most expensive and yet overall the most fruitful thing you can do to save energy, is to install solar panels. Put in one lump sum, and then you rarely have to think about electricity bills ever again. A standard system will set you back on average £5,000 at first, but you’ll be saving around £300 a year.  It should produce 3/4 of your household's electricity needs. And If you’re lucky enough to have one, don’t forget to include your gate in those needs! They’re cheaper to install than an electric gate, free to run and don’t damage the environment.

If all of Britain took these steps to make their homes energy efficient we could save £7.4 billion in energy bills and more than 50 millions tonnes of CO2. It’s easy to overlook the small things when you have solar panels, but don’t forget to turn off lights and turn down the thermostat a degree or two as well. Consider what you can afford to do and how long you will be in the home to reap the rewards, but remember, a well-insulated home will boost house value as well as a contribute to a greener, safer world.

O​VO​ Energy Ltd, registered office 1 Rivergate Temple Quay Bristol, BS1 6ED, company no. 06890795 registered in England and Wales, VAT No. 100119879

Additional terms and conditions
Please see below for full terms and conditions on 33% renewable electricity, 3-5% interest rewards, exit fees and saving claims.


1Monthly cost - Representative monthly direct debit costs based on a non-economy-7, dual-fuel, medium user (3100 kWhs elec. and 12500 kWhs gas) paying in advance by direct debit, including online discount.  All rates correct as of 2/3/2018, but may go up or down.

2Weekly cost - Representative weekly costs based on a non-economy-7, dual-fuel, medium user (3100 kWhs elec. and 12500 kWhs gas).  All rates correct as of 22/11/2017, but may go up or down.

3Pay Monthly Savings claims: Saving based on the estimated annual cost of OVO Two year fixed tariff for a non-economy-7, dual-fuel, medium user (3100 kWhs elec. and 12500 kWhs gas) paying monthly in advance by direct debit, including online discount. Comparisons made against the average of the Big 6 standard variable tariffs with equivalent features. All rates correct as of 2/3/2018.“The Big 6” are British Gas, Scottish Power, SSE, Npower, E.ON and EDF.

4Pay As You Go Savings are based on the average estimated annual costs for new PAYG OVO customers quoted through the OVO website (based on household and/or consumption information provided by those customers), compared to their current supplier and tariff. Comparisons taken between 01/01/2016 and 11/10/16. Incl VAT. Actual savings may vary according to your current supplier or tariff, individual tariff options, household information, consumption and location. 

We include almost twice as much renewable electricity as the national average: At least 33% of electricity in all of our tariffs comes from renewable sources. The national average, according to Ofgem as at March 2014 was 16.7%. For more information please visit this page.

33% of your electricity comes from renewable sources: 33% renewable electricity as standard as of 1st April 2015. Renewable electricity is generated from wind, solar, geothermal, wave, tidal, hydro, biomass, landfill gas, sewage treatment plant gas and biogas.

OVO Interest Rewards: Interest Rewards are paid on credit balances of customers paying by monthly Direct Debit. It is calculated at 3% in your first year, 4% in your second year and 5% in your third year (and every year thereafter) if you pay by Direct Debit. Interest Rewards are paid monthly based on the number of days you’re in credit and the amount left in your account after you’ve paid your bill. Full terms apply:

95% of new customers save when switching to OVO: Savings based on the average estimated annual costs for all new OVO customers quoted through the OVO website, compared to their current supplier and tariff. Comparisons taken between 01/05/2016 and 11/10/16. Incl VAT.

94% of surveyed customers would recommend us: OVO conducted a survey of their customers in between 1st January 2016 and 15th April 2016. Out of 15,312 customers who responded, over 94% rated OVO 6+ when asked 'how likely would you be to recommend us to a friend and family, on a scale of 1 to 10.

uSwitch's Energy Supplier of the Year 2017: OVO energy was voted and awarded  'Energy Supplier of the year' and best for: Overall Customer Satisfaction, Most Likely to be Recommended, Value for Money, Best Deal for You, Customer Service, Billing Services, Energy Efficiency, Meter Services, Online Services, Green Services and Transfer Process. OVO Energy scored a 96% customer satisfaction score.

* EV - Everywhere, full terms and conditions:

* OVO SolarStore (Beta), full terms and conditions:

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