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Renewable Energy

Last updated: 14. 04. 2020

Renewable Energy
As the climate changes, we as humans need to change too. Fossil fuels are fast becoming a thing of the past, while renewable energy is surely the future of electricity production. But what is renewable energy exactly? And how can you use it to your advantage on a small scale? This guide aims to explain everything you need to know. 

What is renewable energy?

Renewable energy, also known as green energy, refers to when gas and electricity is produced from clean and natural sources. It is called renewable energy because, in theory, the source of the energy will never run out. It is called green energy because it produces far less harmful emissions than other forms of energy, such as coal, oil or natural gas.
As the use of fossil fuels have caused pollution levels and climate change to accelerate in recent decades, the global uptake of renewable energy has become increasingly relevant. More and more businesses are moving away from fossil fuels to focus on renewable energy, while a rising number of households are switching to a green energy supplier.

Types of Renewable Energy

Solar Power
Solar power is one of the most common and well-known sources of renewable energy. Solar energy is generated by solar panels which absorb sunlight and turn the sun’s energy into electricity.
Wind Power
Wind power is another common source of renewable energy. It’s usually generated by wind turbines in huge windfarms in particularly windy areas, often offshore. 
Hydroelectric Power
Hydroelectric power, also known simply as hydropower, is generated by large amounts of water flowing through a turbine, typically in major rivers and dams. 
Biomass, or biofuel, refers to renewable energy produced by the burning of organic matter such as wood. This is not the ‘greenest’ form of energy as it still produces carbon emissions but is considered renewable as it comes from natural sources. 
Geothermal Power
One of the more expensive methods of renewable energy generation, geothermal power harnesses the heat stored deep inside the earth and converts it into electricity. 
Tidal Power
Tidal power, also known as wave power, harnesses energy from changes in the tide, which themselves are caused by the gravitational pull of the moon.

How much of the UK’s energy is renewable?

Renewable energy generation has been increasing rapidly in the UK in recent years, with 2019 another record year in the amount of clean energy produced in the country. However, there’s still a long way to go before the UK reaches its target to be carbon-neutral by 2050.
In the third quarter of 2019, renewable energy overtook gas-fired power as the largest source of electricity in the UK, according to the Department for Business, Energy & Industrial Strategy. But more than half of the UK’s energy still comes from non-renewable sources such as gas, oil or nuclear power. Here is the UK’s energy mix for Q3 of 2019:
  • Renewables – 38.9%
  • Gas – 38.8%
  • Nuclear – 18.4%
  • Oil and other – 2.9%
  • Coal – 1%

Can I generate my own renewable energy?

Yes. There are many ways that you could generate renewable energy at home which you could use to help power your household or business, cutting your energy bills whilst at the same time contributing to the fight against climate change. 
  • Solar panels can be installed on your roof. These panels absorb the sunlight and convert it into energy, which can in turn be used to generate electricity for your home or heat your water supply. 
  • Wind turbines can also be installed in some homes, although they are usually only effective in especially windy areas. 
  • Biomass has been used for centuries to heat our homes, usually in the form of wood chips, pellets, or logs. 
While installing solar panels or wind turbines in your home can be an expensive investment initially, you are likely to make significant savings in the long run due to lower energy bills. However, it could be a few years until your investment starts to pay off. And the amount you save will of course depend on a number of factors, from the type of technology used to produce the energy to the size and energy demand of your home or business. 
If you installed a renewable energy generation system in your home before 31 March 2019, then you could also be eligible for the Feed-In Tariff scheme, in which the government pays YOU for the energy that you produce. 

Tips for Saving Energy

As well as generating your own renewable energy or switching to a green energy tariff, you can also make small changes to your behaviour that will go a long way towards making your home more energy efficient, thus pushing your bills down further whilst also doing your bit for the environment. Here are some of our top tips for saving energy at home:
  • Turn all appliances off when they’re not being used.
  • Use your fridge and freezer more efficiently: don’t keep them open for too long, make sure they’re sealed, don’t overfill your fridge (but fill up your freezer as much as you can!).
  • Use your washing machine and dishwasher more efficiently: bigger loads mean less washes and energy used.
  • Replace your light bulbs with energy-efficient LEDs.
  • Invest in home insulation to keep the heat from escaping. 

Which companies supply renewable energy?

With the UK public becoming more eco-conscious, more and more of us are switching to so-called ‘green’ energy suppliers. But who are these green energy suppliers? And what does it actually mean to be one? 
First of all, just because an energy supplier claims to be 100% green, it doesn’t necessarily mean that all the energy they supply to you comes from renewable sources. All of the electricity generated in the UK – renewable and non-renewable – goes to the National Grid. From there it is distributed to every home and business in the country. Some energy suppliers who offer these green energy tariffs do so by matching any electricity you use at home with renewable energy production, and then feeding this back into the National Grid.
While some energy suppliers only provide the National Grid with renewable energy, for example Ecotricity and Bulb, others still use a mix of fuels to generate their energy, like most of the Big Six. However, renewable energy generation is increasing among these suppliers. 
Each of our energy supplier pages includes an up-to-date fuel mix, which shows exactly where each company sources its energy from. You can use this when making a decision about which energy supplier you should be switching to. You can also see a full list of UK energy suppliers that offer 100% renewable energy on our green energy suppliers guide page. 

Compare Energy Prices

If you want to save money as well as the environment, take the time to compare energy deals with usave. All you need to do is provide us with some basic information such as your postcode and current energy supplier, and we’ll provide you with a list of great tariffs, including cheap green energy deals, from which you can choose from. 
Fergus Cole

Author: Fergus Cole

Fergus is a journalist specialising in the personal finance, energy and broadband sectors. He also has a passion for travel and adventure so tries to make the most of this in any spare time he gets.

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