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What we do

We help you unlock the power of real-time sustainable energy

Putting low-carbon power at the heart of your energy strategy is smart business but it can be confusing and involve risk if you are not working with the right energy supplier. Hartree Solutions creates a win-win partnership with you, providing the investment to transform your business’s energy needs and enable it to harness the power of modern distributed energy technologies combined with ground-breaking optimisation solutions.

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How we do it

We invest in the assets and optimise their output utilising a unique data-driven approach to reduce your energy costs

At Hartree Solutions, we invest in on-site generation technologies (Gas, Wind, Solar and/or Storage) to reduce your energy costs and carbon emissions. Our offer doesn’t stop there. We go on to use our energy trading analytics and real-time remote dispatch to turn flexible generation on and off, whilst maintaining a seamless supply to your facility utilising our in-depth knowledge of the energy market gained over three decades of energy trading experience.

We give you all the benefits of direct energy market access, without putting your capital at risk thereby freeing finance up for investment in your core business. Hartree Solutions will lock in market gains and lockout the losses, to your financial benefit via a simple fixed-energy tariff where your total power demand, whether generated on-site or stored for later use and/or from the National Grid, at one low-fixed price.

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A win-win partnership for your business

Take control of your energy costs

Get direct access to previously inaccessible markets

Become more operationally resilient

Reduce your carbon emissions

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Energy solutions for good business

We will create a bespoke energy strategy for your business based on your core energy priorities.

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A single, cohesive partnership where we build, own and operate energy-efficient assets for you.

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We are a market leading optimiser of generation assets based on the real-time wholesale markets.

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Looking for a new gas or electricity supplier? We can supply and optimise your gas and electricity for the better.

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When you want to move your business to a lower carbon future, we can drive your carbon reduction in three core ways.

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We enable you to buy pure green energy directly from owners for use in your business, with significant cost savings.

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Marginal Carbon Charity Christmas Quiz Results

On 22nd December we released Part 2 in our series on Carbon in UK Power…

On 22nd December we released Part 2 in our series on Carbon in UK Power titled “Is It Time to Prioritise Carbon Over Price?” alongside which we set a challenge to estimate the highest marginal carbon intensity on Christmas day with the winner receiving a donation from Hartree Solutions to their chosen charity.

Because we had two very close estimates, we decided to donate to both these very worthwhile charities.

Tim Walls from Grain LNG was our first winner whose chosen charity was Cancer Research UK. Tim is completing a run to raise funds for his charity, and we are delighted to contribute to those efforts.

Our second winner was Marc Tannous from Silver Leaf Partners. Marc’s chosen charity is the London branch of Help for Children, an organisation whose mission is to prevent and treat child abuse. Again, we are delighted to be able to support Marc’s charity.

In way of a recap, in the Market Insight article, we discussed why we believe identifying the marginal generation unit is important to further reduce the UK’s carbon emissions over the coming decade.

“In the power stack, the lowest cost generation is used first while the last generating unit required to meet demand typically sets the price1. This is known as the marginal unit or price-setting unit. Our analysis in this second article highlights the key role this marginal unit will play in reducing the UK’s carbon intensity.”

“Any action we take, say via on-site generation, which displaces a marginal unit and reduces emissions from the grid should be the measure against which we consider the impact of that action.”

Through Hartree Solutions’ in-house modelling, we can extract a marginal balancing unit for each hour2, rather than an annual basis more typical within the industry. We can do this from both a forward-looking perspective and a retrospective view. Below we chart Christmas day showing our modelled average and marginal carbon intensities.

Hartree’s in house modelling of the carbon content of the UK power system on Christmas day

The peak marginal carbon intensity2 was 0.4480 tCO2/MWh_e at 1 pm where UK Power demand also peaked. The average carbon intensity2 for this hour was 0.1771 tCO2/MWh_e.

Uk Power Christmas demand from National Grid

We’d like to thank you all for participating and thus adding to our donations this year. Good luck to Tim with the run and we wish everyone a safe and successful 2021.

 

Footnotes

1 The unit setting the imbalance price is derived via a complicated calculation as seen in this document by Elexon

2 The marginal price setting unit is our in-house modelled estimate along with the average carbon intensity across all modelled running generation

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Carbon in UK Power - Part 2: Is It Time to Prioritise Carbon Over Price?

Up until now, the UK has prioritised keeping the lights on and consumer bills down…

Up until now, the UK has prioritised keeping the lights on and consumer bills down ahead of environmental concerns. In other words, the security of supply and price are put above carbon intensity in the energy trilemma of the UK.

This priority could be set to change as Britain gets serious about its 2050 net-zero target. As we highlighted in our previous article there is still a lot of work to be done to achieve this aim or even the mid-term goal of a 68% cut in greenhouse gas emissions by 20301.

Companies are waking up to the importance of sourcing low carbon generation, yet the current design of power markets makes this both hard to achieve and difficult to quantify (something we discuss in a future thought leadership piece). For example, Volkswagen just announced2 that its top executives’ bonuses will be linked to its ESG targets and last month Sony hinted3 at leaving Japan due to limited access to clean energy with the carbon intensity of the country’s electricity network more than twice that of the UK.

In Part 2 of this series, we:

  • Highlight the challenges the UK faces to reduce carbon from power generation over the coming decade;
  • Demonstrate how our choices greatly impact the UK’s efforts to continue to reduce overall carbon emissions;
  • Introduce the concept of the marginal power unit in the UK system and its importance on carbon emission reductions;
  • Show that measuring carbon on an annual basis is nowhere near detailed enough for the UK to achieve its goal, with a much more granular, half-hourly view on carbon intensity required, just like we have on prices and,
  • Underline the importance of working with a market-leading energy partner to ensure businesses achieve maximum emission reduction.

 

The Marginal Unit

Newton’s third law states that ‘for every action, there is an equal and opposite reaction’

In the power stack, the lowest cost generation is used first while the last generating unit required to meet demand typically sets the price4. This is known as the marginal unit or price-setting unit. Our analysis in this second article highlights the key role this marginal unit will play in reducing the UK’s carbon intensity.

The relevance of Newton’s third law to electricity is that by turning on a generating asset we are displacing an alternative source of production. Yet these decisions are made based on price and not emissions. But to meet the emission goals we need to be considering the carbon impact of these actions as well as the cost of supply.

Through Hartree Solutions’ in-house modelling, we can extract a marginal balancing unit for each hour5, rather than an annual basis more typical within the industry. We can do this from both a forward-looking perspective and a retrospective view.

 

Granular Carbon Analysis

Our highly granular approach gives us a great insight into historic, real-time and forecast carbon emissions. This allows us to design long-term solutions to reduce the carbon content of a company’s electricity use and ultimately completely offset it.

Using this model, when we analyse the relationship between the grid’s average carbon intensity and the power price, we see a good correlation. As power prices increase, the average carbon intensity of the grid also increases.

Hartree Analysis of the correlation of the power price and the average carbon intensity of the network

However, when we look at the carbon intensity of the price-setting unit and the power price, this correlation breaks down. This highlights the impact of a regulatory framework that favours keeping prices down over carbon intensity and can act as a handbrake on the UK’s success in continuing to reduce power emissions.

Hartree Analysis of the correlation of the power price and the marginal carbon intensity of the network

When the grid has a high percentage of low carbon generation but still needs some high carbon generation to meet demand, we could be fooled into thinking that we should look only at the low average carbon intensity and that further carbon reductions are not possible. Yet, where we can substitute this high carbon intensity grid generation with lower carbon local generation, we can further reduce the UK’s total emissions. This is why measuring specific consumers and on-site sources of generation against the marginal carbon intensity of the network is key if the UK is to continue reducing emissions at the rate required.

Hartree analysis of the carbon content showing the marginal vs average over the course of a day

 

Choosing the Right Energy Partner

If you are serious about truly reducing the carbon impact of your business it is essential to work with the right energy partner that is not only able to measure and forecast the carbon-intensity of the network but also able to optimise your energy usage in real-time to benefit you as a consumer. We believe this is a unique skillset of Hartree Solutions.

Most companies and businesses similarly look at their annual carbon intensity rather than a more granular measure. Usually, this is for ease and a lack of data available. It leads to public announcements which boast of ‘purchasing 100% renewable generation’. We believe these can be misleading as it is unclear how their electricity is generated when the wind doesn’t blow or the sun doesn’t shine.

We only need to look back at 26th Nov ’20 where renewable generating made up only 7% of total generation over the day. On days like these, claims of a grid-connected user’s electricity being 100% renewable are questionable.

Generation by fuel type from National Grid data

 

The Challenges that Lie Ahead

The reality is that the UK network is some years away from being able to provide economic solutions for 24/7 low carbon generation. And this is a reality that we as an industry need to better understand and be more open and transparent about.

Delving deeper still, we have charted the UK power generation units that most frequently set the marginal price and then animated them to be sorted by carbon intensity to further highlight the breakdown in correlation between those aspects.

Hartree Analysis highlighting the breakdown in the correlation between price and the marginal setting unit

Any action we take, say via on-site generation, which displaces a marginal unit and reduces emissions from the grid should be the measure against which we consider the impact of that action.

There is also a wide variation in the volume of carbon emissions that are offset depending on the exact timing of the action. All hours are not equal. This becomes clear when we look at a specific day using our in-house modelling between the impact of our action on carbon emitted into the UK atmosphere on an hourly basis.

Much like the total emissions chart in Part 1, we can see the average tCO2/MWhe has significantly and consistently decreased over time as has the marginal equivalent.

 

Hartree analysis of the UK’s annual carbon intensities – average vs marginal

Additionally, displayed over a 24-hour day we can see the importance of analysing any effort to reduce carbon emissions on an hourly basis both on an average and marginal basis. Again, we see a large drop from 2015 as gas has largely replaced coal as the marginal unit. The impact of Covid-19 has led to a big fall from 2019 to 2020 but our analysis indicates that declining trend is set to halt by 2023.

Hartree analysis showing the hourly profile of the average carbon intensity

 

Hartree analysis showing the hourly profile of the marginal carbon intensity

As mentioned in the first article in this series, the easy switches have been exhausted and the real challenges lie ahead. Further evidence of this since we released Part 1 is the prequalification result for the upcoming Capacity Market auction for the delivery year 2024/25. Even four years from now the makeup of reliable generation to insure against blackouts is little changed in its carbon makeup with gas generation continuing to be both relied upon and constructed in the medium term.

The 2024/25 Capacity Auction continues to attract the same fuel type of mix as per the current system

Material carbon reductions from a change of fuel type or technology are not on the immediate horizon in the same way we have experienced over the last five years. We must therefore work harder to reduce our impact on emissions. However, the granular approach adopted by Hartree Solutions can make this achievable, certainly from an individual company’s perspective. We measure the carbon savings from your actions utilising new or existing generation assets. These assets can be optimised to reduce costs, carbon emissions or a combination of both. In the latter, of course, there is a trade-off between reducing costs and reducing emissions and how we balance those two desires. This is where we believe our partners should not only have open transparent data to make this decision but also set these goals themselves.

Ultimately, not all emissions can currently be reduced to zero at source in an economical manner. Therefore, we offer a best-in-class set of carbon offset solutions so each customer can strike their own balance.

No two customers will have the same basket of offsetting products. It is an open and bespoke solution to meet your needs, but Hartree Solutions can offer you a complete solution via directly connected additional renewable generation, optimization of flexible assets to further reduce emissions and completed by offsetting your entire business operation.

More Market Insights

 

Footnotes  
68% reduction in greenhouse gas emissions
Volkswagen announcement
3 Sony hints at move away from Japan
4 The unit setting the imbalance price is derived via a complicated calculation as seen in this document by Elexon
5 The marginal price setting unit extracted from our model is our in-house estimate
6 The Christmas Day Carbon challenge is limited to one entry per person. Entries must be received before 00:01 on Christmas Day. Hartree’s modelling will be used to determine the maximum marginal carbon intensity for any hour on Christmas day. The winning entry is the one closest to the maximum value. Where there is a tie the first entry received will be the winning entry. No Hartree or Hartree affiliate employees will be eligible to win. For each unique entry received we will donate £10 to the winners verified charity of choice up to a cap of £5,000.

 

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