By Christabel - posted on August 16, 2013

Renewable Energy

This article explains everything you need to know about renewable heating and electricity. You’ll learn about their role in reducing carbon emissions, the incentives for choosing renewables, and the types of available technologies. We’ll also leave you with ideas about how you can get involved without adding solar panels or heat pumps to your home.

Get Help

If your heating is broken and you’re looking to transition to low carbon heating or if you want to switch to a green energy supplier, speak to our team about your options.

The Problem

Fossil fuels

Fossil fuels, such as gas, oil and coal, currently account for 81% of global energy use. This number is predicted to continue to rise. The burning of fossil fuels emits harmful gases, leading to an increase in global carbon dioxide (CO2) emissions, which contributes to climate change and the rise in global temperatures. Fossil fuels are also bad for public health; the particulate pollution created by burning these fuels is linked to lung cancer, heart attacks, dementia, and even higher death rates from Covid-19.


Renewable energy technologies have played an important role in reducing CO2 emissions and avoiding depletion of finite resources, as they are extracted from inexhaustible resources such as wind, flowing water, sun, and heat from the earth. People recognise the need for environmentally ethical practices in the fight against climate change. This has, however, contributed to ‘greenwashing’ – when companies market themselves or their products as environmentally conscious when, in fact, they are not. Beware of catch-phrases or vague claims to sustainability, especially those that lack third party verification, when supporting renewable energy suppliers or installing low-carbon energy systems.

The Solution

Here are several good reasons to choose renewables:

  • Help keep the air clean
  • Make use of secure, local resources
  • Reduce your dependence on non-renewable energy
  • Help reduce the production of carbon dioxide and other greenhouse gases
  • Create new jobs in renewable energy industries
  • Save and even earn money

No matter your housing tenure, you can be part of the solution in adopting renewables. Although many incentives are targeted at homeowners, tenants have a number of options to make greener energy choices, too.

Green Tariffs

The easiest way to become part of the renewable energy solution is to switch to a green tariff. Homeowners and renters alike can make this change, and many switching sites make it easy to filter the results.

Changing to any green tariff is a great start, but there are also nuances in the ways green tariffs are offered that can make some a better option than others. A tariff can claim 100% renewable energy if:

  1. An energy supplier pledges to invest 100% of its profits into developing its own renewable energy.
  2. An energy supplier buys renewable energy directly from an existing renewable energy generator, such as a solar farm. This is known as a Power Purchase Agreement. It makes generators more financially viable and therefore promotes the expansion of renewable generators.
  3. An energy supplier purchases Renewable Energy Guarantee of Origins (REGO) certificates. These are issued for every megawatt hour (MWh) of renewable power that generators export to the grid. It theoretically increases the transparency to consumers of the share of renewable energy being sold by their energy supplier and is the most common way suppliers offer green tariffs. The regulator Ofgem, however, believes this doesn’t offer substantial environmental benefits in and of itself.

Some switching sites now categorise their filtered “green tariff” results into tiers to reflect the different ways of achieving the green status. Which? also produced comparison table to give a sense of how green your energy tariff may be. (Please note that the article was published in 2019 and several of the suppliers listed have now ceased trading.)

100% renewable energy tariffs typically refer to electricity. A limited number of suppliers offer green gas, either as biogas produced from anaerobic digestion or as carbon neutral gas, where carbon emissions are offset by investing in carbon emissions reduction schemes.

Because of the way the National Grid works, unless you produce your own renewable heat and electricity and use it, the supply to your home will inevitably have some energy delivered by fossil fuel sources. In choosing a green tariff, however, you’re ensuring that more renewable energy is added to the fuel mix.

Renewable Energy Technologies

Renewable energy can be classed into either electricity-generating technologies or heat-generating technologies.

Electricity generating technologies Heat generating technologies
Solar photovoltaic panels (solar PV) Air source heat pumps
Wind turbines Ground source heat pumps
  Biomass heating
  Solar thermal

Consumer Incentives

Depending on your chosen renewable energy product and installer, you may benefit from financial incentives provided through government schemes.

Boiler Upgrade Scheme (BUS)

The Boiler Upgrade Scheme is a government scheme to provide grants for property owners to help them install low carbon heating. This scheme opened for grant applications and payments on 23rd May 2022, and is due to run from 2022 to 2025. Find out more about the eligibility, measures and application process here.

Smart Export Guarantee (SEG)

The Smart Export Guarantee (SEG) is a government scheme that makes it mandatory for medium to large electricity suppliers (companies with +150,000 electricity customers) to offer tariffs that provide payments for electricity exported to the grid from their customers. Smaller companies can sign up on a voluntary basis. Small-scale generators of renewable electricity (generating up to 5MW, such as a typical domestic household) are eligible for these tariffs. Householders also need to provide proof that the renewable electricity system installation is Microgeneration Certification Scheme (MCS) certified, or equivalent.

Electricity suppliers generally offer fixed price tariffs and the exported electricity is tracked by a smart meter in the home. Solar Energy UK produced a league table of available SEG tariffs, where you can find rates and other information about these deals. Tariffs offered by electricity suppliers may vary depending on how valuable the export is to the electricity system at certain times. For instance, customers may receive higher payments for electricity exported into the National Grid during times when typically more electricity is being used (‘peak times’).

Green Homes Grant Local Authority Delivery (LAD)

Please note: The Green Homes Grant voucher scheme closed to new applications from 31 March 2021. 

The Green Homes Grant scheme is now delivered through local authority partnerships. Please speak to your local authority or our advisors about the eligibility, measures and application process of your local scheme.

What Next

Your actions can limit the CO2 emissions from energy generation. Here are some ideas to consider:

  • Conserve energy. The lower the demand on the grid for energy, the fewer resources are used to supply energy. Learn how to heat sensibly and keep the heat or stop persistent drains.
  • Compare energy tariffs. Ofgem-accredited price comparison sites can help you choose an energy supplier and tariff that is most suitable for your needs, including filtering for green tariffs.
  • Find out about the current and future options and things you might want to consider before choosing low carbon heating.
  • Read more about the various grant schemes that can help fund low carbon heating and other energy efficiency measures.
  • Join a group-buying scheme. Buying in bulk can often save money. That’s the principle behind iChoosr Solar, which helps its customers access solar panels at affordable prices.
  • Become a member of a community energy group. If you can’t put solar PV on your roof, join a local project that builds community-owned solar farms. Hampshire County Council are working with Community Energy South to develop these local community energy groups.