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The Six Main Sources of Renewable Energy

On a basic level a renewable energy source is that which is sustainable, which means it cannot run out, or is an endless source of energy, such as the sun. 

The term ‘alternative energy’ also usually refers to this kind of energy source too, and acts as an alternative to non-sustainable, and often harmful energy sources, such as coal.

Since renewable energy sources are essentially inexhaustible, they are also a fantastic hedge against rising energy prices too. 

At Powerguard, we’re committed to providing renewable energy sources that are both efficient and as clean as possible, which is why, in this blog, we’ll be covering the top alternative energy sources.

What is Low-Carbon Energy?

Before we get into the six main sources of renewable energy, it’s useful to note the distinction between renewable and low-carbon energy sources. 

For example, nuclear-generated electricity cannot be termed as ‘renewable energy’ but it is classed as low-carbon, which means it emits low levels or almost no carbon. 

What Doesn’t Count as Renewable Energy?

The reason fossil fuels can’t be considered as renewable is because they are not an indefinite resource. On top of this they produce harmful carbon deposits into the atmosphere; accelerating climate change.

However, as with most things, there comes a caveat. For example, burning wood can only be considered as a renewable means to create energy if it is coming from sustainably managed forests. 

Six Main Sources of Renewable Energy Explained

Solar Energy

Sunlight is one of the earth’s most freely available energy sources; touching every corner of the planet to varying degrees. 

Statistics show that the amount of solar energy that hits the earth’s surface in just sixty minutes is capable of powering the whole planet for 12 months. 

Although this may seem like the answer to the world’s energy concerns, we must factor in that this will vary greatly depending on the time of day and the season as well as the geographical location.

That said, the changing climate in the UK and increasingly warm summers are making solar panels an incredible way to supplement energy use.

Find out more about these systems.

Wind Energy

Wind is another considerable source of clean energy. The UK, in particular, due to its long shore lines, are one of the leading countries in producing wind energy

In fact, in 2022, UK wind power generation hit historic levels for producing electricity

To harness this powerful energy source in an off-grid power system, for example, turbines are utilised to drive generators which feed electricity into the systems. 

Find out more about these systems, and if they can work for you. 

Hydro Energy

Hydro energy is a more commercially harnessed energy source, when compared to the other two. 

By building a dam, a large reservoir of water can be utilised to create a controlled flow of water that drives a turbine, producing electricity, quite similar to wind generation. 

Since water movement is a constant, when comparing it to solar and wind power, this renewable source of energy can often be more consistent, hence why it is more widely used commercially. 

For more information on similar systems, take a look at our Marine Energy solutions.

Tidal Energy

Tidal energy is another kind of hydro energy, which, as the name suggests, makes use of tidal current currents. 

Although it doesn’t offer the same consistency of output as hydro energy, it is very predictable, so other energy sources can be utilised when the tide is low.

Biomass Energy 

Biomass energy involves converting solid fuel, from plant materials, for example, into electricity. 

In the past, biomass has been a controversial energy source as it involves burning organic materials to produce energy, the reality is that it’s much cleaner and energy-efficient as the years have gone by.

Industrial, agricultural and domestic waste can be turned into liquid, gas and solid fuels, far more economically and environmentally than ever before.

Geothermal Energy 

Taking advantage of natural heat, geothermal energy can repurpose the heat below the surface of the ground, and be used to heat homes and produce electricity. 

Although, this isn’t such a prevalent energy source here in the UK, countries such Iceland, for example, rely on this kind of energy since geothermal heat is readily available.

 

If you’d like to learn more about any of the renewables we’ve mentioned in this blog, or you’d like to find out more about our extensive range of solutions, why not contact us today?

Wind Generated Electricity Reaches Record Amount

Latest reports from the National Grid shows that the UK produced a record amount of wind-generated electricity during 2022.

The UK produced more electricity power via renewable and nuclear power sources, than that of coal and gas during 2022, at highs second only to 2020.

We all know that in order to replace harmful fossil fuels with green power, wind power must take on much of the burden of producing energy for homes up and down the country. 

The global energy crisis has placed further emphasis on renewables since wind and solar power is significantly cheaper to generate than fossil fuel counterparts.

The Statistics 

Image from National Grid SO

Campaigners, scientists and entire nations have long banged the drum for increasing renewable energy as a remedy for the effects of continued global warming and environmental damage. 

In fact, 2022 was the hottest year on record for the UK and these temperatures are expected to continue in the future.

As expected, gas power was the most significant source of electricity generation, according to statistics from the National Grid Electricity System Operator, which showed 38.5% of electricity coming from gas and 26.8% coming from wind power. 

In a single day in November of 2022, more than 20 GW of electricity was produced via wind power for the first time, which represented more than 70% of all of the electricity generated for that day.

Since then that record has been broken again, on the 30th of December 2022, when 20.918GW of electricity was generated by wind turbines. 

Fossil Fuels in 2022

During February, May, October, November and December, more than half of the UK’s electricity generation came from zero carbon electricity sources, such as wind and nuclear power.

Coal usage – widely acknowledged as the most potent of polluters – continued to decrease. In fact, reliance on coal generated electricity has dropped to just 1.5% when compared to 2012, when almost half of generated electricity came via coal.

As the UK continues to build a more green and ecological sound future, which will include greater reliance on wind turbines and solar farms, more and more of our electrical energy will come through this source.

The Future

The UK has a good track record when it comes to offshore wind. Our long stretches of coast and windier climate has made wind energy an attractive prospect.

However, onshore wind generation was effectively banned in 2015, when David Cameron’s government excluded them from the Green subsidies list. This has limited our ability to generate wind power, and further infrastructure is certainly necessary to further our transition from fossil fuels.

Rishi Sunak and his government consulted on the issue in December of 2022, and have relaxed restrictions that have previously served to prevent onshore wind turbines.

However, the government has also promised to increase fossil fuel investment, and approved the development of a new coal mine project in the UK, despite fierce opposition.

Conclusion

Energy prices and supplies were at their most volatile in decades during 2022 due to the war in Ukraine, which led to sanctions placed on the Russian government, who had been an important importer of gas to Europe.

It’s for this reason that the likes of Spain, Germany, Italy and the US began increasing their renewable energy programmes, and why the UK needs to follow suit.

If you’d like any more advice about what we’ve covered in this blog, or you’d like to learn about any of our other products or solutions, then why not contact us today for more information?

Work Begins on Underground Hydrogen Store

UK energy company SSE have begun developing an underground hydrogen store in East Yorkshire in which to stockpile hydrogen. 

Hydrogen is a renewable resource, and the energy company hopes to store the energy source to offer power to the UK during cold snaps, where wind is limited and the country experiences frost and snowy conditions.

The project is designed to produce hydrogen using renewable energy created in a 35 MW electrolyser which will be stored in a cavern roughly the size of St Paul’s Cathedral in Aldbrough, Yorkshire.

The hydrogen will then power a turbine which is capable of exporting power to the grid when demand is particularly high.

Background

SSE has conceived the project, which could cost in excess of £100m, to demonstrate the technology and power of sustainable energy sources, before committing to bigger projects in the area (which we’ll cover below), which may require further pipelines, technology and other infrastructure. 

The company is hoping to offset some of the costs by receiving government funding to support low-carbon hydrogen projects.

In the UK over the past few weeks, the icy conditions led to an increased energy demand as households up and down the country turned up their heating. 

At the same time an unusual lack of wind slashed available power from wind farms, which forced the National Grid to pay higher prices to encourage operators of gas peaking plants to balance the fluctuation in demand.

Why is Hydrogen So Important?

Although hydrogen is an expensive energy source, since it requires such considerable amounts of electricity to create, it is considered a crucial energy resource in the efforts to steer away from fossil fuel reliance.

Powerguard Managing Director and renewable energy expert, Graham Chapman had this to say, “Although hydrogen is expensive in comparison to other kinds of fuel, creating a stockpile means that energy companies are able to deliver power during peak demand.” 

This comes as news of a cap on how much power stations can charge the National Grid for backup electricity was being touted by Ofgem. The regulator is looking to curb excessive profits and is due to publish proposals in early 2023.

The Cost of Adverse Weather

It’s thought that the grid spent almost £30m paying power stations to increase supply at short notice as temperatures dropped over the past few weeks. The Rye House gas-fired power station owned by Vitol Group, raked in as much as £6,000 per megawatt-hour, once again bringing power generation profits into focus again.

Gas-fired power stations are currently exempt from electricity generator levies, which were brought in by the chancellor in November, and assigned as vital energy producers.

SSE itself owns numerous gas-fired power plants across the UK and Ireland, as well as hydroelectric plants and wind farms, and reported more than tripling in profits due to increasing energy prices.

Other Similar Projects

SSE reports that it hopes to have this project operational by 2025, before embarking on a larger hydrogen storage project planned for 2028 alongside Norwegian energy company Equinor. 

The partnership is also looking to develop a hydrogen power station, which is slated to be the world’s first 100% hydrogen-fired power station. The pair will also be working alongside Siemens Energy to design and engineer the project.

The parent company of British Gas, Centrica, has also invested in an industry project which is expected to trial hydrogen production and applications at their peaking plant in Lincolnshire.

 

If you’d like any more advice about what we’ve covered in this blog, or you’d like to learn about our solutions, then why not contact us today for more information?

What Can We Expect from the Energy Market in 2023?

The energy bill freeze is set to conclude in April 2023, but the big question is, will we see a drop in our energy bills in 2023?

We’re living through an “unprecedented cost of living crisis”, which has hiked the price of food, petrol and, most concerning for UK households, energy bills. Market analysis from Cornwall Insights has predicted that without further government action typical energy bills could reach £3,700 a year by April 2023.

In another move the energy regulator Ofgem set the price cap at an annual rate of £4,279 for January 2023, but households will remain shielded by the government Energy Price Guarantee, which will keep annual average bills under this figure.

This, however, only limits the unit price of the energy, so this doesn’t mean you won’t see higher bills if you’re using more energy. This limit of unit prices will roughly equate to the following for the average household:

  • Energy bills on average will sit at around £2,500 per year until April 2023.
  • From April 2023 until the following April, households are expected to fork out around £3,000 per year on average.

This steep rise in energy prices is due to several mitigating factors, such as inflationary increases, the shortage of gas supply caused by the pandemic, and the Russian invasion of the Ukraine.

In this piece, we’ll be exploring what the future might hold for energy prices beyond April 2023 and what the chances are of an increase in costs.

What Can Expect From Energy Prices in 2023?

Ofgem has confirmed the energy price cap from the 1st of January 2023 to March 31st will be rising to an average annual cost of £4,279. This is a huge £730 increase from the £3,549 price cap introduced in October.

Fortunately, this price cap won’t impact households due to the energy price guarantee, which was introduced earlier this year, to protect households until April 2023 on the current £2,500 cap.

Of course, a ‘cap’ doesn’t mean you can use as much energy as you like, and the £2,500 limit is an average not the maximum amount you’ll be charged.

Once the Energy Price Guarantee ends, the average household energy bill will rise to £3,000 per year in April 2023, until April 2024. That’s an estimated increase of £500 a year for households, with the £400 energy discount also ending in March 2023. 

Although this represents a huge hike for most households, it is lower than the original Cornwall Insight’s prediction of £3,700.

Specific unit prices for April 2023 haven’t yet been announced, but are likely to be revealed early in 2023.

What Will Happen to Fixed Rate Deals?

If you’re locked into a fixed tariff, you should still continue to receive the energy price guarantee until April. 

However, if you’ve managed to secure a decent, low rate previously then it’s best to stick with it for now, since it’s not likely you’ll find a better deal elsewhere at the moment. 

Why Are Energy Prices Soaring?

Image from BBC

There are few factors contributing to the soaring energy costs, but one of the main reasons is the Russian squeeze on sending gas supplies to Europe.

The UK relied on Russia for a small fraction of its gas, before the Ukraine invasion. However, Russia manages the pipeline connected to Europe and around 40% of the continent relies on Russian gas supply.

This means British energy suppliers are required to pay similar prices for their energy units as the rest of Europe.

British households are also at a disadvantage since most homes (85%) are heated by gas boilers, when compared to significantly fewer homes in France and Germany (50%) and the fact that 40% of the UK’s electricity comes from gas-fired power plants. 

What Help Will Be Available?

The energy price guarantee won’t impact the £400 energy grant that every household was given to every household in October, this may have been applied to your credit with your energy supplier.

While the £400 will help households during the coldest months of the year until March, from April, as mentioned, the cost cap will increase and we know that while the energy price guarantee will continue, it will be scaled back significantly – we don’t yet know how this might look. 

Most energy suppliers have support lines to help any customers struggling with payments. These may include debt write-offs and grants for those that are really feeling the pinch. 

In most cases, you need to be an existing customer to access help, with the notable exception of the British Gas Energy Trust which is offering grants of £1,000 or more to help struggling customers no matter their supplier. 

If you find yourself struggling, it’s important to contact your supplier as soon as you can to arrange a payment plan to suit you. Before calling ensure you have all the information you need, such as account numbers, up to date energy readings, and household incomings and outgoings to ensure you can reach the right person to help you quickly and efficiently.

 

If you’d like any more advice about what we’ve covered in this blog, or you’d like to learn about any of our other products or solutions, then why not contact us today for more information?

How to Clean Solar Panels

 

Investing in a off-grid power solution is a big investment, and while these systems are usually designed to run with minimal maintenance, they do require intervention from time to time, and solar panels within such a system are a vital component to ensure an efficient energy production process.

Cleaning your solar panels is incredibly important to ensure you’re getting optimal performance. Most are manufactured with a protective layer of glass to protect the inner workings of the technology, but if this coating is allowed to get dirty, the less capable this solar panel will be of performing to the highest standards.

This could be the result of dust, grime, animal debris, or anything else that may prevent sunlight reaching the cells within the panel. This is often one the biggest reasons for solar panel efficiency drop offs, and it’s pretty easy to rectify too, which is why we’ll be looking at how to clean your solar panel in this blog.

Do My Solar Panels Need Cleaning?

There are few ways you can see if your panels are in need of a clean:

  • Physical Spot Checks – you should be inspecting your solar panels on a regular basis, particularly during the winter months, and during summer when pollen and dust levels are at their peak. You should also ensure that your connections are working correctly to ensure you’re receiving regular updates as to their performance and condition.
  • Solar Panel Monitoring Systems – although physical inspections are ideal for pinpointing cleanliness issues and any physical damage, it’s always a good idea to understand precisely whether your solar panels are producing the optimal amount of power through a status monitor. This is similar to a home smart meter, in which the system will constantly monitor the status of the panels to ensure you can keep them in the shape they need to perform at the highest level.

A solar panel system will produce a certain level of electricity each month. By using a monitoring system, you can receive up to date information in regard to whether the system has gone offline or isn’t performing exactly in the way you expect it to.

How Do I Clean Solar Panels?

Once you’ve determined whether your solar panels could do with a good clean, there are several ways to tackle this process.

  • Clean It Yourself – the most obvious, and indeed cheapest option, is to give the panels a good clean yourself. The panels are relatively easy to clean with everyday household products. However, the most effective is good old fashioned warm water and dishwashing detergent. This will enable you to remove any grease, grime and dust that has accumulated across the panels. However, the caveat to this is that it’s important you’re able to reach the panels safely. If you are unable to do so, then looking for professional help is perhaps your best bet.
  • Professional Help – you may be surprised to discover that there are many cleaning businesses now branching out to solar panel cleaning. However, as with anything of this nature, it’s important to find a reputable service that know what they’re doing. Usually your solar installation expert, like ourselves at Powerguard, will be happy to offer recommendations and even offer advice of the best prices for these services and how the panels should be cleaned correctly.

Why Should I Clean My Solar Panels?

Although many solar panels are billed as ‘self-cleaning’, this isn’t an entirely accurate description. Solar panels are commonly manufactured with a hydrophobic coating, which means that water cannot adhere to its surface.

However, the panels aren’t protected from dust, pollen, sap, moss, and animal debris. Without regular cleaning these things can build up on the panels and create shaded areas where the sunlight can’t reach the cells to top up energy reserves.

As you can imagine, if this is left to run its course over several years, this build-up will hamper the overall performance of your system, which is certainly not ideal if you rely on this extra energy in a business or off-grid scenario.

What Other Factors Can Impact Solar Panel Performance?

Swings in temperature can be another factor in panel performance, as the efficiency will increase when the temperature drops, and decrease in high temperatures. This is because the voltage within the cells varies in different temperature ranges.

Another reason to regularly monitor the performance of your panels is because the panels must be in the right position to take full advantage of the sun’s radiation. The orientation and inclination must all be considered during installation, and may need to be adjusted over time. This means that your panels can perform at their very best for longer periods of time.

 

If you’d like to learn more about what we’ve covered in this piece, you’re interested in alternative energy solutions, or any of our other products or solutions, then why not contact us today for more information.

2021 Renewable Energy Review

Renewable energy grew at record pace in 2021, says a new report compiled by the International Energy Agency (IEA).

While this is, of course, welcome news, the IEA also cautioned that the world is at serious risk of missing the mid-century deadline to achieve net zero carbon emissions if we continue rolling out renewable energy solutions at the current pace.

In this blog, we’ll be rounding up exactly what the IEA report outlines and some of our own thoughts  too.

Background

The rise in the deployment of renewable energy solutions came despite increasing costs for the key materials required to manufacture solar panels and wind turbines. This shows how, even at higher costs, the renewables sector is growing to satisfy a global demand for cleaner, greener energy.

By the end of 2021, new renewable power capacities are expected to rise to 290 gigawatts, which outstrips the previous record set in 2020, of 280 gigawatts.

In the coming years renewables will be at the forefront of growing energy infrastructure, and according to the report, will account for 95% of the total increase in global power capacity, which means a rise of over 60% from levels we saw last year, to almost 5,000GW by 2026.

The Report Explained

The IEA report outlines, that on the current path, in five years’ time renewable energy will match global power capacity of fossil fuel and nuclear power combined.

The report also demonstrates how big a role solar power is playing in increasing reliance on renewable energy, with photovoltaic solar power offering more than 50% of the new capacity, due to come online in the next five years.

The record renewable supply of 290 GW’s is just another sign that there is a viable alternative to the fossil fuel industry, and a new economic sector is ready to take the mantle.

Although inflated costs for materials and energy is yet another burden to bear for the industry, we’re also seeing spiralling fossil fuel prices running parallel, which is turning renewables into a genuine, reliable alternative.

Foreign Expansion

The IEA report has landed during the grip of an energy crisis across Europe, and more specifically in the UK. Concerns have been raised that without a complete overhaul of the UK’s energy market, almost 90% of electricity generation in this country is set to be backed by government contract.

It’s because of this, analysts warn that by 2035 UK energy providers will limit incentives in response to supply and demand, due to sustained government backing.

It’s actually China that leads the way when it comes to adding renewable energy capacity, while India is the country with the highest rate when it comes to increasing renewable energy projects.

The report by the IEA explains that China is projected to hit 1,200GW of total wine and solar capacity in 2026 – this is four years shy of their original 2030 target.

When compared to the five years between 2015 to 2020, India is expected to double their wind and solar installations. This growth trend is also expected in Europe and across the pond in the US too.

In fact, between India, China, the US, and Europe renewable energy capacity accounts for 80% of the worldwide total.

The increasing renewable support in India is helping to bolster the government’s announcement of attempting to hit 500GW of renewable energy capacity by 2030, and shows how far India has come when it comes to pushing the clean energy agenda.

Despite consistent criticism of their emissions, China has continued to demonstrate their strengths when it comes to expanding renewable energy projects.

Progress Must Continue

Despite the positives from the report, the warning still remains: ‘progress must continue, and must continue at a faster pace than we are currently seeing’.

The report states that governments must encourage further growth in the sector by addressing crucial obstacles, such as grid integration challenges and inconsistent approaches on policy from country-to-country, and government-to-government.

This is coupled with high financial burdens for the developing world and inconsistent remuneration from leading nations which are also blocking the pathway too.

The report concludes that even in a scenario where the road is cleared, the shift to a renewable energy infrastructure will still fall far shorter of what would be required to hit net-zero by 2050.

These warnings come as the UK’s target of hitting 40GW of wind power by 2030 looks increasingly likely to fall short, with experts claiming that hitting such a target would mean the country must construct the equivalent of a 1.2GW offshore wind farm (the likes of which has never been built before in the UK) every ten weeks for the coming two decades.

 

If you’d like to learn more about what we’ve covered in this piece, you’re interested in alternative energy solutions, then why not contact us today for more information.