UK

Boris unveils plan for Green Britain… but at what cost?

Boris’s net zero blueprint (all 368 (pages of it)  

Boris Johnson’s net zero strategy commits the UK to a raft of changes over the next two decades designed to make sure the UK does its bit for climate change.

Net Zero Strategy: Build Back Greener, released today, runs to some 368 pages, setting out plans to green up every aspect of life.

Homes, vehicles, government buildings and even jobs themselves will have to meet environmental criteria that aids the target of net zero carbon emissions by the middle of the century. 

The document includes:

  • Plans for a new £450 million three-year Boiler Upgrade Scheme will see households offered grants of up to £5,000 for low-carbon heating systems so they cost the same as a gas boiler now.  
  • Additional £60million investment in ‘heat pump innovation – making them beautiful, smaller, easier to install’
  • All of the UK’s electricity derived from low carbon sources by 2035
  • Proposal to sign off the investment decision on a new large-scale nuclear plant by the end of this Parliament
  • Setting targets for power suppliers to increase the number of energy meters in homes 
  • Domestic heat pumps, which use air or the earth’s warmth to provide hot water, should be as affordable as gas equivalents by 2030. The Government wants 600,000 installed every year by 2028, with costs cut between 25 and 50 per cent by 2025
  • No total ban on gas boilers from 2035 after a furious backlash from Tory MPs and homeowners. Instead, the Government has said it will set ‘an ambition that by 2035, no new gas boilers will be sold’
  • The Prime Minister pledges that British homeowners do not pay the price for going green. In his foreword to the report he says: ‘We will make sure what you pay for green, clean electricity is competitive with carbon-laden gas, and with most of our electricity coming from the wind farms of the North Sea or state-of-the-art British nuclear reactors we will reduce our vulnerability to sudden price rises caused by fluctuating international fossil fuel markets’ 
  • All road legal powered vehicles will have to be emission-free by 2040, including motorcycles, buses and lorries
  • Funding of £2billion for walking and cycling plans, including building ‘first hundreds, then thousands of miles of segregated cycle lane and more low-traffic neighbourhoods’ under plans to make more half of all urban journeys on foot or bike by 2030

Boris Johnson today unveiled his plan for turning Britain green by 2050 – but was warned by the Treasury that making the change to Net Zero probably means tax and price rises and he must not borrow to pay for it.

The PM has published the most detailed proposals yet for how the country will achieve the ambition and contribute to the fight against climate change, rejecting alarm at the potential costs to consumers and business.

As well as clean flights, a shift to electric cars by 2035, and gas boilers out by 2030, there will be a focus on encouraging homeowners to be more environmentally-conscious. That could include incentivising mortgage lenders to prioritise properties with better energy ratings.      

In typically bullish style, Mr Johnson insisted that he is not afraid to ‘lead the charge’ – saying ‘history has never been made by those who sit at the back of the class’.

He claimed that Russia and China are ‘following our lead’ – even though both Xi Jinping and Vladimir Putin are expected to snub the COP26 summit in a fortnight, where the premier wants world leaders to commit to slashing carbon emissions.   

The government says that switching from fossil fuels to clean energy, including wind, new nuclear and hydrogen, can ease the reliance on imports and protect families from price spikes. It says 440,000 ‘well-paid’ jobs can be created over the next decade.  

However, there are growing concerns from the Tory backbenches at the consequences of the push. 

And the Treasury delivered a stark warning about the burden in a separate document, saying the transition will have ‘material fiscal consequences’.

Although it acknowledged that the costs of global inaction on climate were greater than those of action, the assessment said that the government must take into account ‘wider long-run pressures to the public finances’.

Insisting it is impossible to put a price on the overhaul, the Treasury said: ‘There will be demands on public spending, but the biggest impact comes from the erosion of tax revenues from fossil fuel-related activity,’ the paper said. 

‘Any temporary revenues from expanded carbon pricing are unlikely to be sufficient to offset the structural decline in tax revenues, but will be important in supporting the transition and can help manage any demands for public spending to support the transition. 

‘If there is to be additional public spending, the government may need to consider changes to existing taxes and new sources of revenue throughout the transition in order to deliver net zero sustainably, and consistently with the government’s fiscal principles.’ 

In what appears to be a barb at Mr Johnson’s free-spending habits, the Treasury said: ‘Seeking to pass the costs onto future taxpayers through borrowing would deviate from the polluter pays principle, would not be consistent with intergenerational fairness nor fiscal sustainability, and could blunt incentives. This could also push up the economic cost of the transition.’  

In a foreword, to the main document – titled Net Zero Strategy: Build Back Greener – Mr Johnson said: ‘The United Kingdom is not afraid to lead the charge towards global net zero at COP26, because history has never been made by those who sit at the back of the class hoping not to be called on. 

‘Indeed, as we set an example to the world by showing that reaching Net Zero is entirely possible, so the likes of China and Russia are following our lead with their own net zero targets, as prices tumble and green tech becomes the global norm.’   

Earlier, Mr Johnson vowed to make Britain the ‘Qatar of hydrogen’ as he wooed businesses chiefs including Bill Gates at a glitzy summit – urging them to invest ‘trillions’ in tackling climate change.

The PM gave a speech and chatted to the Microsoft billionaire on stage as he asked industry leaders to commit funding to decarbonising the world economy – insisting ‘green is good, green is right’.

He said the UK had a responsibility to act on cutting emissions as ‘we were the first to knit the deadly tea cosy of CO2’ – pointing to the ‘big bets’ the government is making on electric vehicles and gigafactories for battery production.

Mr Johnson also played down concerns that the looming COP26 summit in Glasgow will be a failure, saying he is hoping for a ‘good turnout’ of world leaders.  

In a foreword, to the government document – titled Net Zero Strategy: Build Back Greener – Boris Johnson said the UK would ‘lead the charge’

The Net Zero plan sets out a pathway for how various elements need to reduce their carbon emissions over the coming years

The Net Zero plan sets out a pathway for how various elements need to reduce their carbon emissions over the coming years

Boris Johnson chatted to the Microsoft billionaire on stage as he asked industry leaders to commit funding to decarbonising the world economy - insisting 'green is good, green is right'.

Boris Johnson chatted to the Microsoft billionaire on stage as he asked industry leaders to commit funding to decarbonising the world economy – insisting ‘green is good, green is right’.

Mr Johnson is pressing ahead with plans to phase out the installation of conventional gas boilers in the next 15 years, despite Conservative warnings that the move could spark fury among the public

Mr Johnson is pressing ahead with plans to phase out the installation of conventional gas boilers in the next 15 years, despite Conservative warnings that the move could spark fury among the public 

Boris Johnson wants to push Britain towards new sources of energy for homes, including hydrogen, left, and ground source heat pumps, right

Boris Johnson wants to push Britain towards new sources of energy for homes, including hydrogen, left, and ground source heat pumps, right

The problems with the PM’s plan to scrap gas boilers in 14 years

THE PLAN

What the PM wants: No more gas boilers from 2035.

How much it will cost: £500million of taxpayers’ cash on new hydrogen tech

THE PROBLEMS 

High costs of alternatives: A new gas-fired boiler costs about £1,500 with installation, compared to £19,000 for a ground source heat pump or £10,000 for an air source heat pump

Still in development: Hydrogen boilers are not even on the market yet, with Worcester Bosch making a prototype – and their cost is therefore unknown

Effect on house prices: Boilers are normally installed in new builds before people move in, meaning the cost would be factored into the house price 

Mr Johnson wrote: ‘For years, going green was inextricably bound up with a sense that we have to sacrifice thethings we love.

‘But this strategy shows how we can build back greener without so much as a hair shirt in sight.

‘In 2050, we will still be driving cars, flying planes and heating our homes, but our cars will be electric gliding silently around our cities, our planes will be zero emission allowing us to fly guilt-free, and our homes will be heated by cheap reliable power drawn from the winds of the North Sea.’

The plans include making mortgage lenders disclose details about the energy performance of properties they underwrite. 

There will be voluntary targets for improving the efficiency.

The government is also reserving ‘the option of making this target mandatory if insufficient progress is being made’. 

The Treasury’s anxiety over costs comes against the grim backdrop in the public finances – with the national debt having hit £2.2trillion in the wake of the pandemic.  

Fuel duty and vehicle excise duty (VED) amounted to £37billion in 2019-20 – equivalent to 1.7 per cent of gross domestic product, a measure of the size of the economy.

New investment in the plans includes £620million for electric vehicle grants and infrastructure such as on-street charging, £500 million for innovation projects to develop new clean technologies and £140million to help green hydrogen projects get off the ground, officials said.

A £450million pot will give households in England and Wales grants of £5,000 to swap their gas boilers for low-carbon electric heat pumps for heating and hot water, and there is a £124million boost for creating woodlands and restoring peatland to store carbon.

And the Government said it will introduce a zero emission vehicle mandate setting targets for a percentage of manufacturers’ new car and van sales to be zero emissions each year from 2024.

At the business summit, Mr Johnson said there were $24trillion represented in the room at the Science Museum conference London. 

‘I can deploy billions – with the approval of the Chancellor, obviously – but you in this room, you can deploy trillions,’ he said.

‘I want to say to each and every one of those dollars, you are very welcome to the UK and you have come to the right place at the right time.’

He said hydrogen would be a significant part of the solution to replacing fossil fuels. ‘To drive a digger or a truck or to hurl a massive passenger plane down a runway, you need what Jeremy Clarkson used to call ”grunt” – I think there may be a technical term for it – but ”grunt”.

‘Hydrogen provides that grunt, so we are making big bets on hydrogen, we are making bets on solar and hydro, and, yes – of course – on nuclear as well, for our baseload.’  

Mr Johnson channelled the spirit of Michael Douglas’s character from the film Wall Street as he told business chiefs: ‘To adapt Gordon Gekko – who may or may not be a hero of anybody in this room – green is good, green is right, green works.’ 

The UK Government has already committed £200million for the development and demonstration of projects for green hydrogen, long-term energy storage, sustainable aviation fuels and direct air capture of CO2 as part of a £1 billion portfolio of investments. 

Mr Johnson and Mr Gates announced that the Breakthrough Energy Catalyst will match that £200million funding over 10 years to help develop the cutting-edge technologies.

The PM said: ‘It will help to bring innovative technologies to market globally, while building new skills and creating high-quality jobs across the UK.’

Mr Gates said the partnership would ‘accelerate the deployment of these critical climate solutions, helping to make them more affordable and accessible’.

Downing Street dismissed questions about whether it was appropriate for the PM’s to share a stage with Mr Gates after he was criticised for his acquaintance with Jeffrey Epstein. 

‘Our focus is on working with those individuals who are committed to working on this issue,’ the PM’s spokesman said.  

However, despite the enthusiastic words, Mr Johnson seems to have ditched the idea of a total ban on gas boilers from 2035 in the face of anger from Tory MPs and homeowners. Instead there will be a ‘target’ for all new installations to be environmentally-friendly options such as heat pumps. 

Families will be encouraged to install low-carbon systems from April with £5,000 grants, costing taxpayers in England and Wales at least £450million.

But the funding will cover just 90,000 heat pump installations over three years – far short of the PM’s goal of 600,000 a year by 2028. 

Mr Johnson has launched the Heat and Buildings Strategy, mapping out how the UK will move away from polluting energy sources in homes and public buildings. 

It comes amid signs of rising tension between Mr Johnson and Chancellor Rishi Sunak as the Treasury warned of ‘diminishing returns’ from green investment – at a time when the UK’s post-Covid economic recovery has slowed amid rising inflation and widespread shortages.

Prince Charles has increased the pressure on minister to act on climate change by describing how his grandson Prince George has been learning how global warming is causing ‘the big storms, and floods, the droughts, fires and food shortages’ around the world. 

In an interview with Bloomberg last night, Mr Johnson said: ‘The UK is deciding to make a big bet on green technology so the government is going in, setting the regulatory framework to encourage the private sector to come in, in the way that they are – and I’ve quoted some of the numbers for the investment that we are seeing. 

‘So we are making a big bet on wind power, on hydrogen, on electric vehicles, on gigafactories, on carbon capture and storage, all those things. And that’s driving a lot of the investment.’ 

Speaking to broadcasters this morning, Trade Secretary Anne-Marie Trevelyan confirmed that the government was stopping short of introducing a future ban on gas boilers.

She told BBC Radio 4’s Today programme: ‘At the moment we’re encouraging the market to drive those changes.’

However, she did not rule out forcing the move later. 

‘In the short term, yes, of course this is a voluntary scheme,’ she said.

‘There will be a point at which that changes but, yes, for now that’s the case.’ 

The Government unveils its details plans for achieving Net Zero today, detailing the full list of changes being adopted so that the UK can reduce its carbon emissions to ‘net zero’ by 2050.

Mr Johnson will deliver a speech outlining the case for the drive to go green, with less than two weeks before world leaders descend on Glasgow for the COP26 climate change summit.  

Writing in The Sun, the Prime Minister vowed ‘the greenshirts of the boiler police’ won’t kick down doors to rip out dirty gas boilers and said no one will have their ‘trusty old combi’ torn out by ‘sandal-clad’ inspectors. 

‘We’re going to make carbon-free alternatives cheaper to install so that when you or your landlord next come to replace your boiler it makes more sense to go with a cleaner, more efficient replacement that you know will help the planet,’ Mr Johnson added.

The boiler plans are outlined in the Government’s long-awaited ‘heat and buildings strategy’, to be published today. 

How we are increasingly – and so expensively – dependent on gas 

Ministers are desperate to reduce Britain’s dependence on gas as soaring wholesale prices have sent domestic and business energy bills rocketing, writes Harriet Dennys.

An analysis of the UK’s energy supply shows how gas is responsible for around 40 per cent of the overall mix.

Wind power provided almost a fifth of our electricity last month but its contribution fluctuates throughout the year

Wind power provided almost a fifth of our electricity last month but its contribution fluctuates throughout the year

Wind power provided almost a fifth of our electricity last month but its contribution fluctuates throughout the year. It hit a peak of 26 per cent in February.

Our electricity comes from several other sources: nuclear, hydro, biomass, imports and the sun. But amounts vary considerably depending on the season, weather and time of day.

Solar power peaks in June, providing an average 7 per cent of our needs, but was just 0.6 per cent last December. Last week, the sun supplied 3.5 per cent of the UK’s energy.

As gas prices soared last month, old coal plants had to be fired up to help meet electricity needs. Coal, which Ministers want to phase out, contributed two per cent of our electricity mix in September, up from 0.5 per cent a year previously.

Imports increased from seven per cent to ten per cent over the same period, and hydroelectric power doubled to one per cent.

Britain’s over-reliance on gas is because 85 per cent of homes need it for heating. More than half of our gas is imported – it comes from Russia, Norway, the Netherlands and Belgium through pipelines.

Switching to low carbon heating in the coming years will cut emissions, and reduce the UK’s dependency on fossil fuels and exposure to global price spikes in gas, the Government said.

Government sources also confirmed ministers will press ahead later this year with a plan to pile new ‘green’ levies on to gas bills. Levies on electricity will be cut in a bid to persuade consumers to switch to greener energy. 

Friends of the Earth’s Mike Childs said the Government’s plans were ‘quite modest’.  

He added: ‘Housing is one of the hardest sectors to decarbonise but the Government is making it all the more difficult by leaving half its tools in the toolbox, with unambitious policies and inadequate funding.’

Mr Johnson is to announce £9.7billion of overseas investment in the UK, creating 30,000 jobs, Downing Street said. 

The deals will support growth in areas such as wind energy, sustainable homes and carbon capture.

The Prime Minister will host business leaders including Microsoft co-founder Mr Gates at the Global Investment Summit at the Science Museum in London.

Yesterday also saw Ford reveal it is investing £230million to transform its Halewood factory on Merseyside to help build a new generation of zero-emissions cars. Its first electric vehicle parts hub in Europe will safeguard 500 jobs. 

Prince Charles was introducing a documentary ahead of Cop26. He is shown holding a revolving earth in the footage, telling viewers: ‘Your future depends upon the future of the planet.’

The Sky Kids documentary Cop26: In Your Hands features six young activists who highlight the impact of climate change on their corners of the Earth. The prince tells viewers: ‘I’m old enough to have a grandson.

‘Like you, he is learning how climate change is causing the big storms, and floods, the droughts, fires and food shortages we are seeing around the world.’  

Charlie Mullins from Pimlico Plumbers has warned that putting new energy sources into 30million-plus homes ‘would keep the country’s current crop of heating engineers busy for a hundred years’.

There are also major questions about how some of these new solutions such as ground source heat pumps, can work for the millions of small homes and flats in Britain’s cities because they need a hole between 50ft and 300ft deep – or long trenches measuring around 7,000sqft in the garden or grounds.    

Who is coming to the COP26 summit? 

Even the Queen has been publicly complaining that she does not know who is coming to the big UN climate summit in Glasgow.   

CONFIRMED OR LIKELY

US president Joe Biden

Australian PM Scott Morrison

Israeli PM Naftali Bennett 

Turkish president Recep Tayyip Erdogan 

French president Emmanuel Macron 

Italian PM Mario Draghi 

Colombian president Ivan Duque

Swedish PM Stefan Lofven

Swiss President Guy Parmelin

South Korean President Moon Jae-in 

Canadian Prime Minister Justin Trudeau

OUT OR DOUBTFUL 

Chinese president Xi Jinping

Russian president Vladimir Putin 

Brazilian President Jair Bolsonaro

Mexican President Andres Manuel Lopez Obrador

South African President Cyril Ramaphosa

Japanese PM Fumio Kishida 

Pope Francis 

A leaked Treasury briefing ahead of the COP26 summit says the spending needed to achieve Net Zero is ‘uncertain’ and the positive impact of ‘ever more investment’ in greening the economy is likely to reduce. 

The document, which according to the Observer accompanied a presentation to key groups outside government, also cautioned that tax rises could be required to balance the ‘erosion of tax revenue from fossil-fuel related activity’.

As frictions bubble up between the two most powerful figures in government ahead of the Budget on October 27 and crucial summit, Treasury officials have also been complaining about ‘economic illiteracy’ at No10 over lavish spending promises and the danger of inflation running out of control. 

There are claims that Mr Sunak privately lamented the ‘sh**show’ in Downing Street at the height of the pandemic. 

Meanwhile, the Chancellor also faces a wave of counter-briefing, with swipes that he is turning into Bond villain ‘Dr No’ and has been ‘rattled’ by the possibility that he could be replaced. 

The infighting emerged as the PM tries to position the UK at the forefront of the battle against climate change, with the UN summit taking place in Glasgow in a fortnight.

The feuding hit a new level last week as No11 brutally slapped down Kwasi Kwarteng over his public suggestion of a bailout for energy-intensive firms struggling with soaring gas prices – only to be effectively overruled by Mr Johnson.

An admirer of Mr Sunak told the Sunday Times that the relations between the Chancellor and the PM were now starting to resemble those between Tony Blair and Gordon Brown.

However, they pointed out that in this case there was no doubt about who was in charge of government policy. 

‘I’ve been watching the Blair-Brown documentary and I’m worried we are falling into the same thing with Boris and Rishi only this time it is the prime minister with the ”great clunking fist”,’ they said. 

Tory aides pointed out that new Foreign Secretary Liz Truss openly covets the Treasury job and Mr Sunak is ‘rattled’. 

‘Rishi has become Dr No, while Liz is Mrs Yes, Yes, Yes,’ a former minister said.

Rumours have been circulating that Mr Johnson appointed 6ft 5in Simon Clarke as Treasury Chief Secretary partly as a joke at the expense of the rather more diminutive Mr Sunak.

One senior Tory told the Sunday Times that a crunch moment is approaching on the PM’s free-spending habits. 

‘The moment is coming, a bit like Nigel Lawson and Mrs T, where he will have to make a decision as the chancellor whether he is going to continue going along with it,’ they said. 

A Treasury spokesperson said: ‘The Government is committed to tackling climate change and the Prime Minister has set out an ambitious Ten Point Plan to help us achieve that. 

‘The Treasury is playing a crucial role in this effort, by allocating £12billion to fund the Ten Point Plan, setting up the UK Infrastructure Bank to invest in net zero, and committing to raise £15billion through our Green Gilt for projects like zero-emissions buses, offshore wind and schemes to decarbonise homes.’  

The decision came as Prince Charles (pictured in Sky documentary) warned about the consequences of climate change, and told how his grandson Prince George learning how global warming was causing ‘the big storms, and floods, the droughts, fires and food shortages’ around the world

The decision came as Prince Charles (pictured in Sky documentary) warned about the consequences of climate change, and told how his grandson Prince George learning how global warming was causing ‘the big storms, and floods, the droughts, fires and food shortages’ around the world

Global warning: Kynan from Indonesia, who featured in the In Your Hands documentary

Darielen from Brazil appearing in the Sky Kids documentary Cop26: In Your Hands

Left: Kynan from Indonesia, who featured in the In Your Hands documentary. Right: Darielen from Brazil appearing in the Sky Kids documentary Cop26: In Your Hands

How much will gas boiler alternatives cost you? 

GROUND SOURCE HEAT PUMPS (£14,000 – £19,000)

Ground source heat pumps use pipes buried in the garden to extract heat from the ground, which can then heat radiators, warm air heating systems and hot water.

They circulate a mixture of water and antifreeze around a ground loop pipe. Heat from the ground is absorbed into the fluid and then passes through a heat exchanger.

Installation costs between £14,000 to £19,000 depending on the length of the loop, and running costs will depend on the size of the home and its insulation.

Users may be able to receive payments for the heat they generate through the Government’s renewable heat incentive. The systems normally come with a two or three year warranty – and work for at least 20 years, with a professional check every three to five years. 

Ground source heat pumps circulate a mixture of water and antifreeze around a ground loop pipe. Heat from the ground is absorbed into the fluid and then passes through a heat exchanger, and running costs will depend on the size of the home

Ground source heat pumps circulate a mixture of water and antifreeze around a ground loop pipe. Heat from the ground is absorbed into the fluid and then passes through a heat exchanger, and running costs will depend on the size of the home

AIR SOURCE HEAT PUMPS (£11,000)

Air source heat pumps absorb heat from the outside air at low temperature into a fluid to heat your house and hot water. They can still extract heat when it is as cold as -15C (5F), with the fluid passing through a compressor which warms it up and transfers it into a heating circuit.

They extract renewable heat from the environment, meaning the heat output is greater than the electricity input – and they are therefore seen as energy efficient.

There are two types, which are air-to-water and air-to-air, and installing a system costs £9,000 to £11,000, depending on the size of your home and its insulation.

A typical three-bedroom home is said to be able to save £2,755 in ten years by using this instead of a gas boiler.

Air source heat pumps absorb heat from the outside air at low temperature into a fluid to heat your house and hot water. They extract renewable heat from the environment, meaning the heat output is greater than the electricity input

Air source heat pumps absorb heat from the outside air at low temperature into a fluid to heat your house and hot water. They extract renewable heat from the environment, meaning the heat output is greater than the electricity input

HYDROGEN BOILERS (£1,500 – £5,000)

Hydrogen boilers are still only at the prototype phase, but they are being developed so they can run on hydrogen gas or natural gas – so can therefore convert without a new heating system being required.

The main benefit of hydrogen is that produces no carbon dioxide at the point of use, and can be manufactured from either water using electricity as a renewable energy source, or from natural gas accompanied by carbon capture and storage.

A hydrogen-ready boiler is intended to be a like-for-like swap for an existing gas boiler, but the cost is unknown, with estimates ranging from £1,500 to £5,000.

The boiler is constructed and works in mostly the same way as an existing condensing boiler, with Worcester Bosch – which is producing a prototype – saying converting a hydrogen-ready boiler from natural gas to hydrogen will take a trained engineer around an hour.

This graphic from the Government's Hy4Heat innovation programme shows how hydrogen homes would be powered

This graphic from the Government’s Hy4Heat innovation programme shows how hydrogen homes would be powered

SOLAR PHOTOVOLTAIC PANELS (£4,800)

Solar photovoltaic panels generate renewable electricity by converting energy from the sun into electricity, with experts saying they will cut electricity bills.

Options include panels fitted on a sloping south-facing roof or flat roof, ground-standing panels or solar tiles – with each suitable for different settings. They are made from layers of semi-conducting material, normally silicon, and electrons are knocked loose when light shines on the material which creates an electricity flow.

The cells can work on a cloudy day but generate more electricity when the sunshine is stronger. The electricity generated is direct current (DC), while household appliances normally use alternating current (AC) – and an inverter is therefore installed with the system.

The average domestic solar PV system is 3.5 kilowatts peak (kWp) – the rate at which energy is generated at peak performance, such as on a sunny afternoon. A 1kWp set of panels will produce an average of 900kWh per year in optimal conditions, and the cost is £4,800.

Solar photovoltaic panels generate renewable electricity by converting energy from the sun into electricity

Solar water heating systems, or solar thermal systems, use heat from the sun to warm domestic hot water

Solar photovoltaic panels (left) generate renewable electricity by converting energy from the sun into electricity. Solar water heating systems (right), or solar thermal systems, use heat from the sun to warm domestic hot water 

SOLAR WATER HEATING (£5,000)

Solar water heating systems, or solar thermal systems, use heat from the sun to warm domestic hot water.

A conventional boiler or immersion heater can then be used to make the water hotter, or to provide hot water when solar energy is unavailable.

The system works by circulating a liquid through a panel on a roof, or on a wall or ground-mounted system.

The panels absorb heat from the sun, which is used to warm water kept in a cylinder, and those with the system will require a fair amount of roof space receiving direct sunlight for much of the day to make it effectively.

The cost of installing a typical system is between £4,000 and £5,000, but the savings are lower than other options because it is not as effective in the winter months.

BIOMASS BOILERS (£5,000 – £19,000)

Biomass heating systems can burn wood pellets, chips or logs to heat a single room or power central heating and boilers

Biomass heating systems can burn wood pellets, chips or logs to heat a single room or power central heating and boilers

The renewable energy source of biomass is generated from burning wood, plants and other organic matter such as manure or household waste. It releases carbon dioxide when burned, but much less than fossil fuels.

Biomass heating systems can burn wood pellets, chips or logs to heat a single room or power central heating and hot water boilers.

A stove can also be fitted with a back boiler to provide water heating, and experts say a wood-fuelled biomass boiler could save up to £700 a year compared to a standard electric heating system.

An automatically-fed pellet boiler for an average home costs between £11,000 and £19,000, including installation, flue and fuel store. Manually fed log boiler systems can be slightly cheaper, while a smaller domestic biomass boiler starts at £5,000.


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