[HN Gopher] Matched Clean Power Index
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Matched Clean Power Index
UK suppliers claim "100% renewable" even when selling fossil power
at night. Newly launched not-for-profit Matched Clean Power Index
[1] shows, using open data, each supplier's true renewable share
hour by hour. Built by a small team of engineers and energy
analysts -- including a former Tesla engineer -- it combines half-
hourly data from Elexon (demand), National Grid ESO (generation),
and Ofgem (REGOs) to calculate the real renewable fraction for
every major UK supplier. It's the first open dataset of its kind
[2]. The data exposes a PS1 billion-a-year distortion: consumers
pay for "green" certificates that don't align clean supply with
demand. Redirecting that could fund storage and flexibility
instead. The best suppliers match 69-88% of their demand with
real-time renewables -- far better than today's "100%" claims.
We'd love your thoughts on: - Next features/datasets: storage,
nuclear, or CO2 intensity? - API design: what endpoints or update
cadence would be useful? - Visualisation: how would you show
renewable matching over time? [1] https://matched.energy/clean-
power-index [2] https://matched.energy/methodology/v1
Author : bensg
Score : 34 points
Date : 2025-11-02 11:52 UTC (11 hours ago)
(HTM) web link (matched.energy)
(TXT) w3m dump (matched.energy)
| djoldman wrote:
| As far as I know, this results from allowing a producer to
| produce 100% fossil fuel energy and buy certificates to "convert"
| that into 100% renewable.
|
| It's an artifact of stuff like carbon credits. Companies like
| apple, google, and amazon declare that they are carbon neutral,
| or will be by some date, and what they actually do is burn a lot
| of fossil fuel but "offset" it by paying for carbon credits.
| bensg wrote:
| Exactly. That's the core problem the Index exposes. Under
| current UK rules (and indeed in most countries), suppliers can
| legally call their power "100% renewable" even when it's mostly
| gas at times of low renewable generation. They can do this by
| offsetting the non-renewable deficit with certificates from
| sunny summer hours.
|
| What we've tried to do at Matched is make this fact visible,
| showing which suppliers actually deliver clean power hour by
| hour rather than just on paper. A number of suppliers (notably
| Good Energy and Octopus) perform surprisingly well, be
| procuring renewable power that aligns well with their
| consumer's demand.
| jt2190 wrote:
| Not just burn fossil fuel: They also take some of the money
| from the credit sale and fund renewable energy production
| projects, and those will pay back the credit at a future date.
| (That's the theory in very broad strokes, as I understand it.
| Whether that is what _actually_ happens I don't know.)
| evolve2k wrote:
| I've been told that here in Australia our "Green Power" system
| where well meaning consumers can pay extra for greener power is
| similarly broken.
|
| A similar index for Australian power would be pretty useful.
| bensg wrote:
| It's absolutely an international problem. As we get more
| renewables on the grid, we need to move away from the annual
| accounting mechanism that hides daily and seasonal
| intermittency.
|
| The amount of open data that's available in the UK is laudable
| and makes our analysis possible. But we do have some theories
| about how we can expand to other countries. Australia will be
| an interesting one, given renewable penetration.
| bensg wrote:
| HN post is linking to our launch announcement. Full index ranking
| all major UK suppliers is here: https://matched.energy/clean-
| power-index
| dmboyd wrote:
| "This is not fraud" - that's a big claim. There's no
| accountability for accuracy, so of course there's some fraud,
| waste or abuse.
| PaulKeeble wrote:
| The fact they have Drax energy at 88% tells me they are counting
| the giant coal factory converted to burn the worlds forest as
| renewable, it definitely is not just because its biomass. They
| also have EDF energy, the nuclear power producer, very low tells
| us they are counting Nuclear as a none renewable. They aren't
| looking at temporal moves of energy either, which is a big part
| of Octopus energies customers who are solar and battery owners
| and do a lot of energy shifting for the grid. These three
| components mean the wrong companies are at the top and bottom.
| This index is useless as it stands its not about who is good for
| the environment and not.
|
| The fundamental idea we need, but the implementation here is just
| terrible they aren't promoting the right things and it makes me
| wonder who is really behind this given the bad producers who have
| got themselves to near the top.
| bensg wrote:
| Thanks for the feedback. You raise three important points that
| I'll address in turn:
|
| 1. Biomass: We report renewables as defined by Ofgem (the UK
| energy regulator), which for better or worse includes biomass.
| However, we recognise this is contentious. To address this, we
| show the breakdown of generating technologies for each supplier
| so users can see the composition. But regardless, your point is
| valid and has been raised several times this week, so we have a
| PR open to add a filter that lets viewers exclude biomass if
| they disagree with the UK's legal definition.
|
| 2. Nuclear: Our initial focus was on renewable power (where
| intermittency is highest), but we'll be adding nuclear to the
| index in the next few weeks. This will increase the scores for
| EDF, Octopus Energy, and British Gas in particular, who
| purchase the majority of nuclear power. We've called this out
| in various places on the index (e.g., on the EDF page:
| https://matched.energy/clean-power-index/edf-energy).
|
| 3. Load shifting: Because we measure generation and demand at a
| half-hourly level, we do account for load shifting that
| suppliers like Octopus incentivise through agile tariffs. This
| is actually one of the key advantages of our approach over
| historic annual accounting; the half hourly temporal
| granularity means we reward load shifting behaviour.
| hedora wrote:
| Instead of using obviously corrupt measures of sustainability
| (that have been intentionally broken and game-able for
| decades) why not calculate net CO2e?
|
| (Or, better, add a toggle to the UI. That will highlight how
| broken carbon markets and regulatory classifications are.)
| bensg wrote:
| We're already exploring calculating supplier-level carbon
| intensities (CO2e), for which hourly matching is a
| necessary precursor. A toggle between matching score and
| CO2e rankings isn't a bad idea. Should have some updates in
| the coming weeks.
| hammock wrote:
| Is CO2e all that matters now for power to be "clean" or
| sustainable? Seems like that would leave out quite a bit of
| environmental impact, habitats destruction, air and water
| pollution, etc
| toast0 wrote:
| > burn the worlds forest as renewable, it definitely is not
| just because its biomass
|
| The world's forest is renewable. Maybe the rate of harvest is
| unsustainable. Maybe the forest is not being renewed for other
| reasons like the land is being used for grazing or development.
| But it is renew _able_.
| hedora wrote:
| Not necessarily. Take the dust bowl for example, or look at
| global desertification rates. We're basically burning/eating
| topsoil. It's beyond modern technology's capabilities to
| manufacture/ replace topsoil, so it's a non-renewable
| resource, just like coal.
| Krssst wrote:
| The end result will still be that we'll have less forests to
| eat some portion of atmospheric CO2 and more CO2 because we
| burnt wood. What's important is what puts us in a good
| direction to fight climate change, and burning forests more
| than they replenish does not sound something that is it.
| hammock wrote:
| By that logic so is oil and gas no?
| ZeroGravitas wrote:
| These voluntary carbon offset things are only ever going to be a
| step in roughly the right direction.
|
| It feels wrong somehow to be trying to turn them into a perfect
| way for committed individuals to opt into paying the full price
| for their individual contribution to only one aspect of the
| problem.
|
| Instead we should perhaps take a step back and try to assign the
| costs of the whole system to everyone, regardless of whether they
| want to volunteer to pay more to make things happen faster.
|
| It interacts poorly with EV or heat pump adoption where
| volunteering to pay for the last 5% of green electricity could
| tip the balance against those purchases. But buying them would
| lower your carbon footprint at even much lower percentage of
| clean electricity.
|
| Are green conscious consumers ready for the complexity of paying
| for 95% clean energy?
| hedora wrote:
| The easiest approach is to charge for greenhouse gas emissions
| at the source.
|
| Set the price to be 2x the cost of direct air carbon capture,
| then put the money in a fund that pays for cheapest
| environmentally responsible capture first.
|
| This would lead to ev's and heat pumps being drastically
| cheaper than older technologies.
|
| While they're at it, federalize the price gouging oil
| companies. We have signs at gas stations run by international
| megacorps here in California complaining that we have the
| highest fuel taxes in the US. The taxes are listed on the
| pumps, by law.
|
| If you subtract them out, and compare the results to other
| states, you'll find that we're being price gouged dollars per
| gallon by the industries.
|
| (The excuse for this is that there was months-long supply chain
| shock 20+ years ago. Of course, the prices never went down
| after that shock...)
|
| Anyway, screw them. We have EVs now, and as bad as PG&E's rates
| are, it's still saving us hundreds of dollars a month.
| lozenge wrote:
| Direct air capture can't be purchased at any price to even
| soak up 1% of our emissions.
| adrianN wrote:
| That doesn't mean that you can't purchase it for x tons of
| carbon and use that to set the price.
| hammock wrote:
| That's not how markets work though. For instance, just
| because one share of AAPL sold at $270 does not mean all
| 15 billion outstanding shares can be sold for that price.
| If a sell order was put in for even 10k shares you'd
| quickly find out that you might find a 270 bid for some
| of that but not all. Order flow is an important tool ,
| bid/ask is misleading without it
| adrianN wrote:
| Setting the price that high would mean starvation for a lot
| of people and this isn't feasible. Ramping the price up
| slowly is probably too slow to avoid the worst tipping
| points, so we need pricing signals together with other
| policies for the most effective climate action.
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