Henri Horn
@henrihorn.bsky.social
Clean energy consultant, Nürnberg.
#Wärmewende
Archived tweets (excl retweets and replies) since 2017 archived at dormant handle @hhornfi.bsky.social
#Wärmewende
Archived tweets (excl retweets and replies) since 2017 archived at dormant handle @hhornfi.bsky.social
Reposted by Henri Horn
This Spanish City has been car-free for more than 20 years. Air pollution is down by 61%, no traffic deaths since 2009: buff.ly/2D3Ghwd
We have so many solutions. Implement them. #ActOnClimate
#climate #energy #renewables #carfree #phaseoutfossilfuels
We have so many solutions. Implement them. #ActOnClimate
#climate #energy #renewables #carfree #phaseoutfossilfuels
December 4, 2025 at 7:07 PM
This Spanish City has been car-free for more than 20 years. Air pollution is down by 61%, no traffic deaths since 2009: buff.ly/2D3Ghwd
We have so many solutions. Implement them. #ActOnClimate
#climate #energy #renewables #carfree #phaseoutfossilfuels
We have so many solutions. Implement them. #ActOnClimate
#climate #energy #renewables #carfree #phaseoutfossilfuels
Reposted by Henri Horn
New sand battery planned for Finland www.bestmag.co.uk/new-sand-bat...
New sand battery planned for Finland - Best Magazine
An industrial-scale sand battery is planned for the district heating network in Vääksy, Finland.
www.bestmag.co.uk
December 4, 2025 at 6:57 AM
New sand battery planned for Finland www.bestmag.co.uk/new-sand-bat...
Solar PV Projects being developed in Finland:
Identified: 2,54 GW
Permitting / studies ongoing: 20,09 GW
Permitted 3,02 GW
Under construction 0,523 GW
SUM: 26,2 GW
Finnish power system: about 10 GW.
suomenuusiutuvat.fi/media/202508...
Identified: 2,54 GW
Permitting / studies ongoing: 20,09 GW
Permitted 3,02 GW
Under construction 0,523 GW
SUM: 26,2 GW
Finnish power system: about 10 GW.
suomenuusiutuvat.fi/media/202508...
suomenuusiutuvat.fi
December 3, 2025 at 9:26 PM
Solar PV Projects being developed in Finland:
Identified: 2,54 GW
Permitting / studies ongoing: 20,09 GW
Permitted 3,02 GW
Under construction 0,523 GW
SUM: 26,2 GW
Finnish power system: about 10 GW.
suomenuusiutuvat.fi/media/202508...
Identified: 2,54 GW
Permitting / studies ongoing: 20,09 GW
Permitted 3,02 GW
Under construction 0,523 GW
SUM: 26,2 GW
Finnish power system: about 10 GW.
suomenuusiutuvat.fi/media/202508...
Reposted by Henri Horn
In Nuremberg in 1945, the Americans established the principle that "just following orders" is no excuse for crime. The six members of Congress are right to remind us of that today
The Duty to Disobey Unlawful Orders Was America’s Idea
“Stauffenberg pointed the way: if your obedience requires you to do criminal, unhuman things, you are no longer bound by your oath. A soldier’s final benchmark must always, in the last instance, be his conscience, not his orders.” That’s what Jan Techau, a friend of mine with a special vantage on this matter (more about Stauffenberg in a minute), told me when I asked him what he thought about a controversy now raging in the United States.
bloom.bg
December 1, 2025 at 10:15 AM
In Nuremberg in 1945, the Americans established the principle that "just following orders" is no excuse for crime. The six members of Congress are right to remind us of that today
Reposted by Henri Horn
For less than the price of one basic 800 W #balconysolar unit + installation in California (> 2000 USD?) you could get a #Balkonkraftwerk in Germany with:
-4x 500 W panels = 2000 W total
-inverter limited to 800 W feed-in
-integrated 1,6 kWh battery
...costing 1.379 EUR or 1.600 USD
-4x 500 W panels = 2000 W total
-inverter limited to 800 W feed-in
-integrated 1,6 kWh battery
...costing 1.379 EUR or 1.600 USD
November 27, 2025 at 1:05 AM
For less than the price of one basic 800 W #balconysolar unit + installation in California (> 2000 USD?) you could get a #Balkonkraftwerk in Germany with:
-4x 500 W panels = 2000 W total
-inverter limited to 800 W feed-in
-integrated 1,6 kWh battery
...costing 1.379 EUR or 1.600 USD
-4x 500 W panels = 2000 W total
-inverter limited to 800 W feed-in
-integrated 1,6 kWh battery
...costing 1.379 EUR or 1.600 USD
Deutschland begeht denselben Irrtum wie #Finnland und #Nokia: Weder Tastenhandys noch Verbrenner sind zukunftsfähig.
Und welch Ironie: #Mercedes stoppt die Produktion von AMG und A-Klasse ausgerechnet in Finnland. Hunderte stehen vor Entlassung oder Kurzarbeit.
yle.fi/a/74-20184741
Und welch Ironie: #Mercedes stoppt die Produktion von AMG und A-Klasse ausgerechnet in Finnland. Hunderte stehen vor Entlassung oder Kurzarbeit.
yle.fi/a/74-20184741
Ylen tiedot: Mersujen tuotanto loppuu Uudessakaupungissa kokonaan
Autotehtaalla on valmistettu Mercedes-Benzejä vuodesta 2013 lähtien. Nyt Mersujen aika tehtaalla on päättymässä. Asiasta kerrottiin työntekijöille eilen.
yle.fi
December 1, 2025 at 8:59 PM
Deutschland begeht denselben Irrtum wie #Finnland und #Nokia: Weder Tastenhandys noch Verbrenner sind zukunftsfähig.
Und welch Ironie: #Mercedes stoppt die Produktion von AMG und A-Klasse ausgerechnet in Finnland. Hunderte stehen vor Entlassung oder Kurzarbeit.
yle.fi/a/74-20184741
Und welch Ironie: #Mercedes stoppt die Produktion von AMG und A-Klasse ausgerechnet in Finnland. Hunderte stehen vor Entlassung oder Kurzarbeit.
yle.fi/a/74-20184741
Example of solar #DistrictHeating cooperative in Germany
#SolarwärmeBracht.
12.000 m² #solarThermal collectors
20.000 m³ #pitThermalEnergyStorage 🇩🇰 style
Solar fraction 70%
#heatPump +Biomass boiler
130 households, total 2.7 GWh/a
Price 60€/month + 16 ct/kWh
www.solarwaerme-bracht.de/faq/
#SolarwärmeBracht.
12.000 m² #solarThermal collectors
20.000 m³ #pitThermalEnergyStorage 🇩🇰 style
Solar fraction 70%
#heatPump +Biomass boiler
130 households, total 2.7 GWh/a
Price 60€/month + 16 ct/kWh
www.solarwaerme-bracht.de/faq/
November 30, 2025 at 7:27 PM
Example of solar #DistrictHeating cooperative in Germany
#SolarwärmeBracht.
12.000 m² #solarThermal collectors
20.000 m³ #pitThermalEnergyStorage 🇩🇰 style
Solar fraction 70%
#heatPump +Biomass boiler
130 households, total 2.7 GWh/a
Price 60€/month + 16 ct/kWh
www.solarwaerme-bracht.de/faq/
#SolarwärmeBracht.
12.000 m² #solarThermal collectors
20.000 m³ #pitThermalEnergyStorage 🇩🇰 style
Solar fraction 70%
#heatPump +Biomass boiler
130 households, total 2.7 GWh/a
Price 60€/month + 16 ct/kWh
www.solarwaerme-bracht.de/faq/
Reposted by Henri Horn
When the UK's new nuclear power plant Hinkley Point C starts to produce power in 2030, its guaranteed 'strike price' will have risen to ~150 £/MWh (170 €/MWh). Average wholesale electricity prices will probably be around half of that, so that's a 50% subsidy.
www.theguardian.com/uk-news/2025...
1/2
www.theguardian.com/uk-news/2025...
1/2
UK energy bill payers will hand £2bn a year to EDF for new power stations
French government-owned company to receive funding for Hinkley Point C and Sizewell C
www.theguardian.com
November 29, 2025 at 9:43 AM
When the UK's new nuclear power plant Hinkley Point C starts to produce power in 2030, its guaranteed 'strike price' will have risen to ~150 £/MWh (170 €/MWh). Average wholesale electricity prices will probably be around half of that, so that's a 50% subsidy.
www.theguardian.com/uk-news/2025...
1/2
www.theguardian.com/uk-news/2025...
1/2
Saufen war schon immer ein wesentlicher Teil finnischer Kultur, und sogar für Politiker eine natürliche Freizeitsbeschäftigung. Ähnlich wie Fleischfressen für Söder.
Aber wehe, eine junge Politikerin versucht dasselbe!
www.spiegel.de/ausland/finn...
Aber wehe, eine junge Politikerin versucht dasselbe!
www.spiegel.de/ausland/finn...
(S+) Finnische Ex-Regierungschefin Sanna Marin: »Ich musste mich fragen lassen, wie viel Alkohol ich getrunken hatte«
Vier Jahre regierte Sanna Marin Finnland, doch hängen blieb bei vielen vor allem ein privates Tanzvideo. Hier spricht sie über Sexismus in der Politik und das Leben danach.
www.spiegel.de
November 29, 2025 at 7:49 PM
Saufen war schon immer ein wesentlicher Teil finnischer Kultur, und sogar für Politiker eine natürliche Freizeitsbeschäftigung. Ähnlich wie Fleischfressen für Söder.
Aber wehe, eine junge Politikerin versucht dasselbe!
www.spiegel.de/ausland/finn...
Aber wehe, eine junge Politikerin versucht dasselbe!
www.spiegel.de/ausland/finn...
Reposted by Henri Horn
First Power From Germany’s Largest Offshore Wind Farm Using 15 MW Turbines
Project generated and delivered its first kilowatt-hour of electricity as it started the commissioning process for its turbines.
Project generated and delivered its first kilowatt-hour of electricity as it started the commissioning process for its turbines.
First Power From Germany’s Largest Offshore Wind Farm Using 15 MW Turbines
Germany’s largest offshore wind farm to date, EnBW’s He Dreith project, achieved key milestones as it proceeds with construction and provides encoura...
maritime-executive.com
November 28, 2025 at 8:54 AM
First Power From Germany’s Largest Offshore Wind Farm Using 15 MW Turbines
Project generated and delivered its first kilowatt-hour of electricity as it started the commissioning process for its turbines.
Project generated and delivered its first kilowatt-hour of electricity as it started the commissioning process for its turbines.
Reposted by Henri Horn
... In essence that #sandBattery is a heating station that can continuously provide 2 MW of renewable heat for 10 days straight when the wind doesn't blow and the sun doesn't shine.
November 27, 2025 at 7:46 AM
... In essence that #sandBattery is a heating station that can continuously provide 2 MW of renewable heat for 10 days straight when the wind doesn't blow and the sun doesn't shine.
California is now at a point where solar power displaces fossil gas as #1 electricity source.
Both account for 40 TWh per year, with solar increasing and gas declining.
Also, batteries provide 5 GW during summer evening peak hours, compared to just 1 GW in 2022.
www.utilitydive.com/news/natural...
Both account for 40 TWh per year, with solar increasing and gas declining.
Also, batteries provide 5 GW during summer evening peak hours, compared to just 1 GW in 2022.
www.utilitydive.com/news/natural...
November 27, 2025 at 12:43 PM
California is now at a point where solar power displaces fossil gas as #1 electricity source.
Both account for 40 TWh per year, with solar increasing and gas declining.
Also, batteries provide 5 GW during summer evening peak hours, compared to just 1 GW in 2022.
www.utilitydive.com/news/natural...
Both account for 40 TWh per year, with solar increasing and gas declining.
Also, batteries provide 5 GW during summer evening peak hours, compared to just 1 GW in 2022.
www.utilitydive.com/news/natural...
When wind power is abundant and spot prices are negative (which occurs in Finland about 700 hours per year, including winter) this #sandBattery takes excess electricity off the grid, stores 250 megawatt-hours (MWh) heat in hot sand, and afterwards feed 2 megawatts (MW) into the #districtHeating grid
New “world’s largest” sand battery to double the size of current record holder reneweconomy.com.au/new-worlds-l...
reneweconomy.com.au
November 27, 2025 at 7:29 AM
When wind power is abundant and spot prices are negative (which occurs in Finland about 700 hours per year, including winter) this #sandBattery takes excess electricity off the grid, stores 250 megawatt-hours (MWh) heat in hot sand, and afterwards feed 2 megawatts (MW) into the #districtHeating grid
Reposted by Henri Horn
Today on Volts: I've had more requests to cover this than almost any other topic in the pod's history, so now, at long last, balcony solar! We dig into how "plug-in solar" took off in Europe & how it's making its way to the US, starting in Utah. Backyard DIY types rejoice!
What's the deal with balcony solar?
Cora Stryker joins me to explain how "plug-in" solar took Europe by storm and is finally, via Utah (?), making its way to America.
www.volts.wtf
November 26, 2025 at 6:24 PM
Today on Volts: I've had more requests to cover this than almost any other topic in the pod's history, so now, at long last, balcony solar! We dig into how "plug-in solar" took off in Europe & how it's making its way to the US, starting in Utah. Backyard DIY types rejoice!
It would be fair to specify in the title of the article that the said problem with Car Batteries does NOT relate to battery-powered electric vehicles.
It's about recycling of lead acid batteries: meaning starter batteries for internal combustion vehicles.
EVs use lithium batteries, not lead-acid.
It's about recycling of lead acid batteries: meaning starter batteries for internal combustion vehicles.
EVs use lithium batteries, not lead-acid.
Auto Industry Was Warned For Years of Poisoning, Sickness From Car Batteries - The New York Times www.nytimes.com/2025/11/25/w...
The Auto Industry Was Warned: Battery Recycling Was Poisoning People
www.nytimes.com
November 26, 2025 at 6:26 PM
It would be fair to specify in the title of the article that the said problem with Car Batteries does NOT relate to battery-powered electric vehicles.
It's about recycling of lead acid batteries: meaning starter batteries for internal combustion vehicles.
EVs use lithium batteries, not lead-acid.
It's about recycling of lead acid batteries: meaning starter batteries for internal combustion vehicles.
EVs use lithium batteries, not lead-acid.
Reposted by Henri Horn
China's wind and solar capacity additions rebounded in October after the predictable slump over the summer. 14 GW solar and 9 GW wind was added to the grid, after an average of 9 GW solar and 3 GW wind per month in the past three months.
November 26, 2025 at 12:47 PM
China's wind and solar capacity additions rebounded in October after the predictable slump over the summer. 14 GW solar and 9 GW wind was added to the grid, after an average of 9 GW solar and 3 GW wind per month in the past three months.
Reposted by Henri Horn
250MWh ‘Sand Battery’ to start construction in Finland, for both heating and ancillary services www.energy-storage.news/250mwh-sand-...
250MWh 'Sand Battery' to start construction in Finland, for both heating and ancillary services
Polar Night Energy and Lahti Energia have partnered for a project using 'Sand Battery' technology for a district heating network in Finland.
www.energy-storage.news
November 26, 2025 at 1:03 PM
250MWh ‘Sand Battery’ to start construction in Finland, for both heating and ancillary services www.energy-storage.news/250mwh-sand-...
Reposted by Henri Horn
Mit der Sand-Heizung durch den Winter tenor.bethmannbank.de/nachhaltigke...
Mit der Sand-Heizung durch den Winter
Grüne Energie ist heutzutage ein Muss. Doch um von ihr auch nachts oder bei Windstille profitieren zu können, benötigen wir Speicher. Ein finnisches Startup setzt auf Sand und heizt damit bereits heut...
tenor.bethmannbank.de
November 26, 2025 at 1:07 PM
Mit der Sand-Heizung durch den Winter tenor.bethmannbank.de/nachhaltigke...
Reposted by Henri Horn
My latest for @rollingstone.com
Trump’s Vendetta Against Wind is Gutting Jobs and Raising Prices.
But in Baltimore, I met blue collar workers who are fighting back, preparing for the “Green Workforce of the Future,” and defending offshore wind.
Read: www.rollingstone.com/politics/pol...
Trump’s Vendetta Against Wind is Gutting Jobs and Raising Prices.
But in Baltimore, I met blue collar workers who are fighting back, preparing for the “Green Workforce of the Future,” and defending offshore wind.
Read: www.rollingstone.com/politics/pol...
November 23, 2025 at 3:41 PM
My latest for @rollingstone.com
Trump’s Vendetta Against Wind is Gutting Jobs and Raising Prices.
But in Baltimore, I met blue collar workers who are fighting back, preparing for the “Green Workforce of the Future,” and defending offshore wind.
Read: www.rollingstone.com/politics/pol...
Trump’s Vendetta Against Wind is Gutting Jobs and Raising Prices.
But in Baltimore, I met blue collar workers who are fighting back, preparing for the “Green Workforce of the Future,” and defending offshore wind.
Read: www.rollingstone.com/politics/pol...
Finally, wind power capacity in Germany is growing at an increased pace in the first half of 2025, with 67% more additions than last year's equivalent period. But the record year is still 2017.
www.tagesschau.de/wissen/klima...
www.tagesschau.de/wissen/klima...
Windkraft in Deutschland: Der entscheidende Aufwind
Windenergie ist ein zentrales Zugpferd der deutschen Energiewende. Nach Jahren schleppenden Ausbaus zeigen die politischen Beschleunigungsmaßnahmen erste Erfolge. Von Jan Koch.
www.tagesschau.de
November 25, 2025 at 6:56 AM
Finally, wind power capacity in Germany is growing at an increased pace in the first half of 2025, with 67% more additions than last year's equivalent period. But the record year is still 2017.
www.tagesschau.de/wissen/klima...
www.tagesschau.de/wissen/klima...
Reposted by Henri Horn
I'm really glad renewable technology development doesn't depend on the COP negotiations.
Petrostates, fossil fuel companies, and their lackeys can sabotage diplomacy, but it's becoming increasingly transparent what they do is simply evil, while we will ditch fossil fuels anyway.
Petrostates, fossil fuel companies, and their lackeys can sabotage diplomacy, but it's becoming increasingly transparent what they do is simply evil, while we will ditch fossil fuels anyway.
COP30 BREAKING NEWS: The likely final text of the "global mutirão" has been published, ahead of the closing plenary
Here's the snap analysis from the CB team…see last line
unfccc.int/sites/def...
Here's the snap analysis from the CB team…see last line
unfccc.int/sites/def...
November 23, 2025 at 12:03 PM
I'm really glad renewable technology development doesn't depend on the COP negotiations.
Petrostates, fossil fuel companies, and their lackeys can sabotage diplomacy, but it's becoming increasingly transparent what they do is simply evil, while we will ditch fossil fuels anyway.
Petrostates, fossil fuel companies, and their lackeys can sabotage diplomacy, but it's becoming increasingly transparent what they do is simply evil, while we will ditch fossil fuels anyway.
Exactly 80 years ago the #NurembergTrials started.
Back then, POTUS was not a corrupt narcissist despot so USA rejected proposals by Stalin and other allies to summarily execute Nazi #warCriminals after show trials, and instead demanded evidence based fair trials and #RuleOfLaw
Back then, POTUS was not a corrupt narcissist despot so USA rejected proposals by Stalin and other allies to summarily execute Nazi #warCriminals after show trials, and instead demanded evidence based fair trials and #RuleOfLaw
November 23, 2025 at 11:47 AM
Exactly 80 years ago the #NurembergTrials started.
Back then, POTUS was not a corrupt narcissist despot so USA rejected proposals by Stalin and other allies to summarily execute Nazi #warCriminals after show trials, and instead demanded evidence based fair trials and #RuleOfLaw
Back then, POTUS was not a corrupt narcissist despot so USA rejected proposals by Stalin and other allies to summarily execute Nazi #warCriminals after show trials, and instead demanded evidence based fair trials and #RuleOfLaw
#DistrictHeating can be Local Cooperative, as in rural Steyerberg, 🇩🇪 Germany:
-28 km network
-450 buildings
-14.000 m2 #SolarThermal
-17.000 m3 #HeatStorage tank
-5x air source #heatPumps total 1090 kW
-2x 900kW heat pumps
-950 kW biomass boiler
-cost 30 M€
www.energiezukunft.eu/buergerenerg...
-28 km network
-450 buildings
-14.000 m2 #SolarThermal
-17.000 m3 #HeatStorage tank
-5x air source #heatPumps total 1090 kW
-2x 900kW heat pumps
-950 kW biomass boiler
-cost 30 M€
www.energiezukunft.eu/buergerenerg...
Kraftakt Wärmewende: Genossenschaftliches Wärmeprojekt im zweiten Anlauf
Geplant und finanziert war ein Nahwärmenetz, das zu 70 Prozent die Abwärme eines Chemieunternehmens nutzen sollte. Dann kam alles anders. Nun ist ein Technologiemix entstanden, der in seiner Vielfalt ...
www.energiezukunft.eu
November 22, 2025 at 9:33 PM
#DistrictHeating can be Local Cooperative, as in rural Steyerberg, 🇩🇪 Germany:
-28 km network
-450 buildings
-14.000 m2 #SolarThermal
-17.000 m3 #HeatStorage tank
-5x air source #heatPumps total 1090 kW
-2x 900kW heat pumps
-950 kW biomass boiler
-cost 30 M€
www.energiezukunft.eu/buergerenerg...
-28 km network
-450 buildings
-14.000 m2 #SolarThermal
-17.000 m3 #HeatStorage tank
-5x air source #heatPumps total 1090 kW
-2x 900kW heat pumps
-950 kW biomass boiler
-cost 30 M€
www.energiezukunft.eu/buergerenerg...
Reposted by Henri Horn
Mit "technologieoffen" ist nicht wirklich technogieoffen gemeint, sondern: Wir wollen keinen #Klimaschutz machen.
November 15, 2025 at 4:04 PM
Mit "technologieoffen" ist nicht wirklich technogieoffen gemeint, sondern: Wir wollen keinen #Klimaschutz machen.