Jan Rosenow
@janrosenow.bsky.social
Professor of Energy & Climate Policy at University of Oxford
Energy Programme Leader at ECI, University of Oxford
Senior Research Fellow at Oriel College, Oxford
Senior Associate Institute for Sustainability Leadership, University of Cambridge
Energy Programme Leader at ECI, University of Oxford
Senior Research Fellow at Oriel College, Oxford
Senior Associate Institute for Sustainability Leadership, University of Cambridge
Earlier this year world’s largest battery-electric ship was successfully launched from the main production hall of Incat Tasmania into the River Derwent in Hobart, Australia.
The ferry carries 2,100 passengers and 225 vehicles.
The ferry carries 2,100 passengers and 225 vehicles.
November 14, 2025 at 3:31 PM
Earlier this year world’s largest battery-electric ship was successfully launched from the main production hall of Incat Tasmania into the River Derwent in Hobart, Australia.
The ferry carries 2,100 passengers and 225 vehicles.
The ferry carries 2,100 passengers and 225 vehicles.
In the global electrification race China is marching ahead.
The US and Europe risk falling behind clinging on to yesterday's technologies.
The US and Europe risk falling behind clinging on to yesterday's technologies.
November 14, 2025 at 1:51 PM
In the global electrification race China is marching ahead.
The US and Europe risk falling behind clinging on to yesterday's technologies.
The US and Europe risk falling behind clinging on to yesterday's technologies.
How to rapidly scale the heat pump market?
“The main hurdle is the price ratio of gas to electricity. [Reforming taxation of energy] would unlock a much more market-driven transition.”
That’s what I told the FT. Excellent piece.
“The main hurdle is the price ratio of gas to electricity. [Reforming taxation of energy] would unlock a much more market-driven transition.”
That’s what I told the FT. Excellent piece.
November 14, 2025 at 7:09 AM
How to rapidly scale the heat pump market?
“The main hurdle is the price ratio of gas to electricity. [Reforming taxation of energy] would unlock a much more market-driven transition.”
That’s what I told the FT. Excellent piece.
“The main hurdle is the price ratio of gas to electricity. [Reforming taxation of energy] would unlock a much more market-driven transition.”
That’s what I told the FT. Excellent piece.
Over 2/3 of primary energy is wasted as heat.
The transition isn’t about matching that waste — it’s about outperforming it with efficient clean energy technology.
The transition isn’t about matching that waste — it’s about outperforming it with efficient clean energy technology.
November 13, 2025 at 8:37 PM
Over 2/3 of primary energy is wasted as heat.
The transition isn’t about matching that waste — it’s about outperforming it with efficient clean energy technology.
The transition isn’t about matching that waste — it’s about outperforming it with efficient clean energy technology.
This should be fun: I accepted to serve as a Judge for the upcoming Global Energy Transition Awards hosted by Reuters Events alongside fellow judges Jigar Shah, Amy Jaffe, Brian Dean and Rita Dias.
November 13, 2025 at 3:16 PM
This should be fun: I accepted to serve as a Judge for the upcoming Global Energy Transition Awards hosted by Reuters Events alongside fellow judges Jigar Shah, Amy Jaffe, Brian Dean and Rita Dias.
A reminder: energy isn't just electricity.
Many countries have done well to decarbonise the tip of the energy iceberg - electricity.
The hard bit is what's below the tip of the iceberg - heat, cooling and transport.
Many countries have done well to decarbonise the tip of the energy iceberg - electricity.
The hard bit is what's below the tip of the iceberg - heat, cooling and transport.
November 13, 2025 at 2:13 PM
A reminder: energy isn't just electricity.
Many countries have done well to decarbonise the tip of the energy iceberg - electricity.
The hard bit is what's below the tip of the iceberg - heat, cooling and transport.
Many countries have done well to decarbonise the tip of the energy iceberg - electricity.
The hard bit is what's below the tip of the iceberg - heat, cooling and transport.
Churches across the UK — some centuries-old, uninsulated, many heritage buildings — are embracing electric heat-pump systems to replace oil and gas boilers. It’s a powerful symbol of how decarbonisation and stewardship go hand-in-hand.
www.thereengineer.pro/p/let-there-...
www.thereengineer.pro/p/let-there-...
November 13, 2025 at 12:33 PM
Churches across the UK — some centuries-old, uninsulated, many heritage buildings — are embracing electric heat-pump systems to replace oil and gas boilers. It’s a powerful symbol of how decarbonisation and stewardship go hand-in-hand.
www.thereengineer.pro/p/let-there-...
www.thereengineer.pro/p/let-there-...
Truly remarkable: Poland used to be a climate laggard.
Today, wind and solar are increasingly replacing coal in the Polish electricity mix with almost 30% of all electricity generated to date this year from wind and solar.
In 2000 coal provided 95% of Polish electricity.
Today it is at 51%.
Today, wind and solar are increasingly replacing coal in the Polish electricity mix with almost 30% of all electricity generated to date this year from wind and solar.
In 2000 coal provided 95% of Polish electricity.
Today it is at 51%.
November 13, 2025 at 8:47 AM
Truly remarkable: Poland used to be a climate laggard.
Today, wind and solar are increasingly replacing coal in the Polish electricity mix with almost 30% of all electricity generated to date this year from wind and solar.
In 2000 coal provided 95% of Polish electricity.
Today it is at 51%.
Today, wind and solar are increasingly replacing coal in the Polish electricity mix with almost 30% of all electricity generated to date this year from wind and solar.
In 2000 coal provided 95% of Polish electricity.
Today it is at 51%.
The end of the internal combustion engine?
Sales of petrol and diesel cars in China peaked in 2017 and are now falling rapidly.
The shift to electric and low-carbon transport is well underway—and EV sales are rising fast.
Sales of petrol and diesel cars in China peaked in 2017 and are now falling rapidly.
The shift to electric and low-carbon transport is well underway—and EV sales are rising fast.
November 12, 2025 at 3:36 PM
The end of the internal combustion engine?
Sales of petrol and diesel cars in China peaked in 2017 and are now falling rapidly.
The shift to electric and low-carbon transport is well underway—and EV sales are rising fast.
Sales of petrol and diesel cars in China peaked in 2017 and are now falling rapidly.
The shift to electric and low-carbon transport is well underway—and EV sales are rising fast.
The Talatan Solar Park in China is absurdly huge — stretching across 600 km² of the Tibetan Plateau (about 7× Manhattan’s size) and generating around 17 GW of power.
It’s so big you can see it from space — a shimmering sea of panels.
It’s so big you can see it from space — a shimmering sea of panels.
November 12, 2025 at 2:39 PM
The Talatan Solar Park in China is absurdly huge — stretching across 600 km² of the Tibetan Plateau (about 7× Manhattan’s size) and generating around 17 GW of power.
It’s so big you can see it from space — a shimmering sea of panels.
It’s so big you can see it from space — a shimmering sea of panels.
Contrary to some media reports, heat pumps aren’t new tech — they’ve been around for 100+ years!
✅ First built in 1856 by Peter von Rittinger
✅ Zurich City Hall used one from 1938–2001
✅ UK’s first in 1945 (Norwich)
✅ ~200 million in use worldwide today
✅ First built in 1856 by Peter von Rittinger
✅ Zurich City Hall used one from 1938–2001
✅ UK’s first in 1945 (Norwich)
✅ ~200 million in use worldwide today
November 12, 2025 at 11:19 AM
Contrary to some media reports, heat pumps aren’t new tech — they’ve been around for 100+ years!
✅ First built in 1856 by Peter von Rittinger
✅ Zurich City Hall used one from 1938–2001
✅ UK’s first in 1945 (Norwich)
✅ ~200 million in use worldwide today
✅ First built in 1856 by Peter von Rittinger
✅ Zurich City Hall used one from 1938–2001
✅ UK’s first in 1945 (Norwich)
✅ ~200 million in use worldwide today
China’s CO2 emissions have now been flat or falling for 18 months, starting in March 2024.
This trend continued in the third quarter of 2025, when emissions were unchanged year-on-year.
If this trend starts to move into sustained carbon emissions reduction it would be hugely significant.
This trend continued in the third quarter of 2025, when emissions were unchanged year-on-year.
If this trend starts to move into sustained carbon emissions reduction it would be hugely significant.
November 11, 2025 at 9:00 PM
China’s CO2 emissions have now been flat or falling for 18 months, starting in March 2024.
This trend continued in the third quarter of 2025, when emissions were unchanged year-on-year.
If this trend starts to move into sustained carbon emissions reduction it would be hugely significant.
This trend continued in the third quarter of 2025, when emissions were unchanged year-on-year.
If this trend starts to move into sustained carbon emissions reduction it would be hugely significant.
Europe is a world leader in industrial electrification solutions:
61% of all industrial heat pump and electro-thermal storage manufacturers are headquartered in Europe.
US is also very strong in electro-thermal storage when it comes to companies located there.
Note: This is preliminary data.
61% of all industrial heat pump and electro-thermal storage manufacturers are headquartered in Europe.
US is also very strong in electro-thermal storage when it comes to companies located there.
Note: This is preliminary data.
November 11, 2025 at 2:48 PM
Europe is a world leader in industrial electrification solutions:
61% of all industrial heat pump and electro-thermal storage manufacturers are headquartered in Europe.
US is also very strong in electro-thermal storage when it comes to companies located there.
Note: This is preliminary data.
61% of all industrial heat pump and electro-thermal storage manufacturers are headquartered in Europe.
US is also very strong in electro-thermal storage when it comes to companies located there.
Note: This is preliminary data.
A decade ago, solar power barely registered in Hungary’s electricity mix — just 0.2% of generation. Back then, nuclear, coal, and gas dominated the grid.
Fast forward ten years and solar power now supplies around 1/4 of Hungary’s electricity — a remarkable transformation.
Fast forward ten years and solar power now supplies around 1/4 of Hungary’s electricity — a remarkable transformation.
November 11, 2025 at 11:41 AM
A decade ago, solar power barely registered in Hungary’s electricity mix — just 0.2% of generation. Back then, nuclear, coal, and gas dominated the grid.
Fast forward ten years and solar power now supplies around 1/4 of Hungary’s electricity — a remarkable transformation.
Fast forward ten years and solar power now supplies around 1/4 of Hungary’s electricity — a remarkable transformation.
There's an army of people out there telling us change is impossible.
Only that it is not.
10 years ago electric vehicles plaid almost no role in global car sales.
Today one in five cars sold worldwide is electric.
Only that it is not.
10 years ago electric vehicles plaid almost no role in global car sales.
Today one in five cars sold worldwide is electric.
November 11, 2025 at 10:34 AM
There's an army of people out there telling us change is impossible.
Only that it is not.
10 years ago electric vehicles plaid almost no role in global car sales.
Today one in five cars sold worldwide is electric.
Only that it is not.
10 years ago electric vehicles plaid almost no role in global car sales.
Today one in five cars sold worldwide is electric.
What if we had no electricity and everything ran on fossil fuels?
This ad keeps making me chuckle.
Enjoy if you have not seen it or rewatch as it is just gold.
This ad keeps making me chuckle.
Enjoy if you have not seen it or rewatch as it is just gold.
November 11, 2025 at 8:04 AM
What if we had no electricity and everything ran on fossil fuels?
This ad keeps making me chuckle.
Enjoy if you have not seen it or rewatch as it is just gold.
This ad keeps making me chuckle.
Enjoy if you have not seen it or rewatch as it is just gold.
Good news: more than 50% of the world’s economies have seen carbon emissions from fossil fuel power generation peaking. And with the speed of change in the electricity sector many more will join this growing list in coming years.
November 11, 2025 at 7:18 AM
Good news: more than 50% of the world’s economies have seen carbon emissions from fossil fuel power generation peaking. And with the speed of change in the electricity sector many more will join this growing list in coming years.
Batteries are coming to Europe. Earlier this year Europe’s largest battery storage site went live at Blackhillock, Scotland.
The facility has a capacity of 300MW/600MWh.
Much larger batteries are under development: A huge 1 GW / 4 GWh system is being constructed in Jänschwalde, Germany.
The facility has a capacity of 300MW/600MWh.
Much larger batteries are under development: A huge 1 GW / 4 GWh system is being constructed in Jänschwalde, Germany.
November 10, 2025 at 5:47 PM
Batteries are coming to Europe. Earlier this year Europe’s largest battery storage site went live at Blackhillock, Scotland.
The facility has a capacity of 300MW/600MWh.
Much larger batteries are under development: A huge 1 GW / 4 GWh system is being constructed in Jänschwalde, Germany.
The facility has a capacity of 300MW/600MWh.
Much larger batteries are under development: A huge 1 GW / 4 GWh system is being constructed in Jänschwalde, Germany.
I often read on social media that Germany just replaced nuclear with coal.
That is evidently not the case.
Coal generation is down by more than 60% over last decade with nuclear now gone.
However, Germany could have phased out coal by now if it had kept nuclear generation going at 2011 levels.
That is evidently not the case.
Coal generation is down by more than 60% over last decade with nuclear now gone.
However, Germany could have phased out coal by now if it had kept nuclear generation going at 2011 levels.
November 10, 2025 at 3:52 PM
I often read on social media that Germany just replaced nuclear with coal.
That is evidently not the case.
Coal generation is down by more than 60% over last decade with nuclear now gone.
However, Germany could have phased out coal by now if it had kept nuclear generation going at 2011 levels.
That is evidently not the case.
Coal generation is down by more than 60% over last decade with nuclear now gone.
However, Germany could have phased out coal by now if it had kept nuclear generation going at 2011 levels.
Solar’s price drop is astonishing: panels are now 98% cheaper than when I first analyzed them in 2004.
Today, building a fence with solar can be cheaper than using wood.
Today, building a fence with solar can be cheaper than using wood.
November 10, 2025 at 8:10 AM
Solar’s price drop is astonishing: panels are now 98% cheaper than when I first analyzed them in 2004.
Today, building a fence with solar can be cheaper than using wood.
Today, building a fence with solar can be cheaper than using wood.
“Heat pumps are superior in efficiency to condensing boilers, even if the heat pumps are powered by electricity from a power station burning natural gas.”
Not me saying that but the late Prof Sir David MacKay.
More in my @carbonbrief.org article 👇
interactive.carbonbrief.org/factcheck/he...
Not me saying that but the late Prof Sir David MacKay.
More in my @carbonbrief.org article 👇
interactive.carbonbrief.org/factcheck/he...
November 9, 2025 at 9:05 PM
“Heat pumps are superior in efficiency to condensing boilers, even if the heat pumps are powered by electricity from a power station burning natural gas.”
Not me saying that but the late Prof Sir David MacKay.
More in my @carbonbrief.org article 👇
interactive.carbonbrief.org/factcheck/he...
Not me saying that but the late Prof Sir David MacKay.
More in my @carbonbrief.org article 👇
interactive.carbonbrief.org/factcheck/he...
A historic turning point for clean heating in Europe: For the first time, in the first half of 2025 sales of heat pumps in Germany have surpassed those of gas boilers.
This is a big milestone, demonstrating that the transition away from fossil fuels in our buildings is not just a future ambition.
This is a big milestone, demonstrating that the transition away from fossil fuels in our buildings is not just a future ambition.
November 9, 2025 at 2:36 PM
A historic turning point for clean heating in Europe: For the first time, in the first half of 2025 sales of heat pumps in Germany have surpassed those of gas boilers.
This is a big milestone, demonstrating that the transition away from fossil fuels in our buildings is not just a future ambition.
This is a big milestone, demonstrating that the transition away from fossil fuels in our buildings is not just a future ambition.
ICE vehicles waste a whopping 80% of the energy in their fuel. Electric vehicles are propelled by entirely different mechanisms. Energy enters the vehicle as electricity, which directly powers the drivetrain: EVs need not convert one form of energy to another resulting in much higher efficiency.
November 9, 2025 at 9:22 AM
ICE vehicles waste a whopping 80% of the energy in their fuel. Electric vehicles are propelled by entirely different mechanisms. Energy enters the vehicle as electricity, which directly powers the drivetrain: EVs need not convert one form of energy to another resulting in much higher efficiency.
Despite negative press reporting the energy transition is well underway. In the UK, we see strong demand for electric vehicles and solar panels. And the more people learn that these technologies can offer them tangible benefits the more others will adopt them too.
November 8, 2025 at 5:57 PM
Despite negative press reporting the energy transition is well underway. In the UK, we see strong demand for electric vehicles and solar panels. And the more people learn that these technologies can offer them tangible benefits the more others will adopt them too.
China’s rise as the world’s clean energy superpower is reshaping global decarbonisation. The full implications are only starting to sink in.
An important new FT piece highlights that while much of the debate has focused on how Europe and the US should respond, the bigger story might be elsewhere.
An important new FT piece highlights that while much of the debate has focused on how Europe and the US should respond, the bigger story might be elsewhere.
November 8, 2025 at 7:51 AM
China’s rise as the world’s clean energy superpower is reshaping global decarbonisation. The full implications are only starting to sink in.
An important new FT piece highlights that while much of the debate has focused on how Europe and the US should respond, the bigger story might be elsewhere.
An important new FT piece highlights that while much of the debate has focused on how Europe and the US should respond, the bigger story might be elsewhere.