Peter Jarka-Sellers
@pjarkasellers.bsky.social
Policy at Run On Climate @runonclimate.bsky.social. Climate & energy policy in the US, internationally (esp Europe/India). Johns Hopkins @johnshopkinssais.bsky.social SAIS alum. Philly native 🦅, runner, podcast lover, auch Österreicher. 🇦🇹 🇺🇸 Opinions mine.
Finally, in an energy system dominated by polluting sources, the only way to achieve this NDC is solar and EVs.
October 31, 2025 at 2:22 AM
Finally, in an energy system dominated by polluting sources, the only way to achieve this NDC is solar and EVs.
Furthermore, energy access is still low and a core priority.
October 31, 2025 at 2:20 AM
Furthermore, energy access is still low and a core priority.
Especially significant because energy demand is rising rapidly.
October 31, 2025 at 2:19 AM
Especially significant because energy demand is rising rapidly.
During peak demand in ERCOT, 3-4 GW of coal was unexpectedly offline. Not a problem at all because renewables met 50% of demand.
Attacking renewables in favor of ‘dispatchable’ power to help the grid… 🤦🏻♂️
#energysky
pv-magazine-usa.com/2025/07/22/s...
Attacking renewables in favor of ‘dispatchable’ power to help the grid… 🤦🏻♂️
#energysky
pv-magazine-usa.com/2025/07/22/s...
July 23, 2025 at 12:08 PM
During peak demand in ERCOT, 3-4 GW of coal was unexpectedly offline. Not a problem at all because renewables met 50% of demand.
Attacking renewables in favor of ‘dispatchable’ power to help the grid… 🤦🏻♂️
#energysky
pv-magazine-usa.com/2025/07/22/s...
Attacking renewables in favor of ‘dispatchable’ power to help the grid… 🤦🏻♂️
#energysky
pv-magazine-usa.com/2025/07/22/s...
Heatwave hits.
Huge demand, higher than forecast.
Unexpected outages at ‘fully dispatchable’ traditional power plants.
Solar and batteries keep the grid stable and reduce costs at the same time.
#energysky
www.canarymedia.com/articles/cle...
Huge demand, higher than forecast.
Unexpected outages at ‘fully dispatchable’ traditional power plants.
Solar and batteries keep the grid stable and reduce costs at the same time.
#energysky
www.canarymedia.com/articles/cle...
July 20, 2025 at 6:44 PM
Heatwave hits.
Huge demand, higher than forecast.
Unexpected outages at ‘fully dispatchable’ traditional power plants.
Solar and batteries keep the grid stable and reduce costs at the same time.
#energysky
www.canarymedia.com/articles/cle...
Huge demand, higher than forecast.
Unexpected outages at ‘fully dispatchable’ traditional power plants.
Solar and batteries keep the grid stable and reduce costs at the same time.
#energysky
www.canarymedia.com/articles/cle...
Shared my thoughts with @thehindu.com's businessline on how Trump’s irresponsible energy policies are hurting clean energy companies, costing jobs, and slowing decarbonization. 🔌⚡ “Policy shocks to boost fossil fuels and harm the clean energy sector are taking a toll on US clean energy companies..."
June 23, 2025 at 10:52 AM
Shared my thoughts with @thehindu.com's businessline on how Trump’s irresponsible energy policies are hurting clean energy companies, costing jobs, and slowing decarbonization. 🔌⚡ “Policy shocks to boost fossil fuels and harm the clean energy sector are taking a toll on US clean energy companies..."
Hidden and undisclosed devices in some Chinese-made, system-critical energy equipment. Enables equipment to be shut off from China which already happened once last November. Esp dangerous b/c Chinese manufacturers are required to work w/ China's intel agencies. 🔌💡
www.utilitydive.com/news/rogue-c...
www.utilitydive.com/news/rogue-c...
May 22, 2025 at 3:21 PM
Hidden and undisclosed devices in some Chinese-made, system-critical energy equipment. Enables equipment to be shut off from China which already happened once last November. Esp dangerous b/c Chinese manufacturers are required to work w/ China's intel agencies. 🔌💡
www.utilitydive.com/news/rogue-c...
www.utilitydive.com/news/rogue-c...
Renewables and storage helping keep Texas’ grid stable during a major heatwave while the Republican state legislature restricts them.
State or federal, attacks on clean energy hurt grid reliability and drive up prices. 🔌💡
www.houstonchronicle.com/business/ene...
State or federal, attacks on clean energy hurt grid reliability and drive up prices. 🔌💡
www.houstonchronicle.com/business/ene...
May 15, 2025 at 3:03 PM
Renewables and storage helping keep Texas’ grid stable during a major heatwave while the Republican state legislature restricts them.
State or federal, attacks on clean energy hurt grid reliability and drive up prices. 🔌💡
www.houstonchronicle.com/business/ene...
State or federal, attacks on clean energy hurt grid reliability and drive up prices. 🔌💡
www.houstonchronicle.com/business/ene...
Finally making my way through this book. It’s excellent! 🔌💡
Macro takeaways so far:
Steel- hard but doable, off-takers urgently needed
Chemicals- most difficult scientifically
Clean hydrogen- we need a huge amount ASAP, even just to replace current hydrogen use
@jeffrissman.bsky.social
Macro takeaways so far:
Steel- hard but doable, off-takers urgently needed
Chemicals- most difficult scientifically
Clean hydrogen- we need a huge amount ASAP, even just to replace current hydrogen use
@jeffrissman.bsky.social
May 11, 2025 at 9:47 PM
Finally making my way through this book. It’s excellent! 🔌💡
Macro takeaways so far:
Steel- hard but doable, off-takers urgently needed
Chemicals- most difficult scientifically
Clean hydrogen- we need a huge amount ASAP, even just to replace current hydrogen use
@jeffrissman.bsky.social
Macro takeaways so far:
Steel- hard but doable, off-takers urgently needed
Chemicals- most difficult scientifically
Clean hydrogen- we need a huge amount ASAP, even just to replace current hydrogen use
@jeffrissman.bsky.social
Incredible growth.
Mississippi and Louisiana: from very little solar as late as 2021 to 1.5 GW in 2024.
Indiana and Arkansas added 1.5+ GW in the last year.
☀️🔌💡
pv-magazine-usa.com/2025/05/07/s...
Mississippi and Louisiana: from very little solar as late as 2021 to 1.5 GW in 2024.
Indiana and Arkansas added 1.5+ GW in the last year.
☀️🔌💡
pv-magazine-usa.com/2025/05/07/s...
May 9, 2025 at 2:32 PM
Incredible growth.
Mississippi and Louisiana: from very little solar as late as 2021 to 1.5 GW in 2024.
Indiana and Arkansas added 1.5+ GW in the last year.
☀️🔌💡
pv-magazine-usa.com/2025/05/07/s...
Mississippi and Louisiana: from very little solar as late as 2021 to 1.5 GW in 2024.
Indiana and Arkansas added 1.5+ GW in the last year.
☀️🔌💡
pv-magazine-usa.com/2025/05/07/s...
Wind is getting so much better and it's no just new wind farms. 🔌💡
Huge upgrades to existing wind farms: more electricity generation, fewer materials, lower costs
www.cnbc.com/2025/04/27/w...
Huge upgrades to existing wind farms: more electricity generation, fewer materials, lower costs
www.cnbc.com/2025/04/27/w...
May 6, 2025 at 5:31 PM
Wind is getting so much better and it's no just new wind farms. 🔌💡
Huge upgrades to existing wind farms: more electricity generation, fewer materials, lower costs
www.cnbc.com/2025/04/27/w...
Huge upgrades to existing wind farms: more electricity generation, fewer materials, lower costs
www.cnbc.com/2025/04/27/w...
Neuer @iea.org Länderbericht zu Deutschland fördert Kontinuität mit der Dekarbonisierungspolitik in Bereichen Strom und Gebäuden und betont wie wichtig „klaren Zielen und Zeitvorgaben“ sind. Schneller Vorschritt im Verkehrssektor wird dringend gebracht, laut dem Bericht.
www.focus.de/earth/analys...
www.focus.de/earth/analys...
April 17, 2025 at 7:34 PM
Neuer @iea.org Länderbericht zu Deutschland fördert Kontinuität mit der Dekarbonisierungspolitik in Bereichen Strom und Gebäuden und betont wie wichtig „klaren Zielen und Zeitvorgaben“ sind. Schneller Vorschritt im Verkehrssektor wird dringend gebracht, laut dem Bericht.
www.focus.de/earth/analys...
www.focus.de/earth/analys...
☀️🇦🇹 Gute Nachricht: 2024 PV Zubau von 2,2 GW fast am Rekordniveau (installierte Leistung 8,3 GW)
Nicht gut: Zubau in 2024 10% gesunken
Um den negativen Trend zu stoppen fordert PV Austria die Zurückherstellung der Mehrwertsteuer-Befreiung und das E-Wirtschaftsgesetz
www.pv-magazine.de/2025/03/26/o...
Nicht gut: Zubau in 2024 10% gesunken
Um den negativen Trend zu stoppen fordert PV Austria die Zurückherstellung der Mehrwertsteuer-Befreiung und das E-Wirtschaftsgesetz
www.pv-magazine.de/2025/03/26/o...
March 28, 2025 at 3:37 PM
☀️🇦🇹 Gute Nachricht: 2024 PV Zubau von 2,2 GW fast am Rekordniveau (installierte Leistung 8,3 GW)
Nicht gut: Zubau in 2024 10% gesunken
Um den negativen Trend zu stoppen fordert PV Austria die Zurückherstellung der Mehrwertsteuer-Befreiung und das E-Wirtschaftsgesetz
www.pv-magazine.de/2025/03/26/o...
Nicht gut: Zubau in 2024 10% gesunken
Um den negativen Trend zu stoppen fordert PV Austria die Zurückherstellung der Mehrwertsteuer-Befreiung und das E-Wirtschaftsgesetz
www.pv-magazine.de/2025/03/26/o...
It’s a hard time in the climate and clean energy sector.
-To job seekers like myself, keep at it.
-To organizations, we appreciate your work and determination.
-To people hiring, clear communication and transparency like this email I got are very important and deeply appreciated.
🔌⚡️
-To job seekers like myself, keep at it.
-To organizations, we appreciate your work and determination.
-To people hiring, clear communication and transparency like this email I got are very important and deeply appreciated.
🔌⚡️
March 25, 2025 at 6:56 PM
It’s a hard time in the climate and clean energy sector.
-To job seekers like myself, keep at it.
-To organizations, we appreciate your work and determination.
-To people hiring, clear communication and transparency like this email I got are very important and deeply appreciated.
🔌⚡️
-To job seekers like myself, keep at it.
-To organizations, we appreciate your work and determination.
-To people hiring, clear communication and transparency like this email I got are very important and deeply appreciated.
🔌⚡️
Hard to overstate the harm to our health that electrifying buildings can prevent.
#energysky
e360.yale.edu/digest/europ...
#energysky
e360.yale.edu/digest/europ...
March 17, 2025 at 3:47 PM
Hard to overstate the harm to our health that electrifying buildings can prevent.
#energysky
e360.yale.edu/digest/europ...
#energysky
e360.yale.edu/digest/europ...
Furthermore, this seasonal pricing means that utilities sell more power at the time of the year when they sell less power. This means:
-they have spare generation that they are not making money from
-the system has spare capacity and can absorb more power demand
This is true all over the country!
🔌⚡
-they have spare generation that they are not making money from
-the system has spare capacity and can absorb more power demand
This is true all over the country!
🔌⚡
March 12, 2025 at 10:02 PM
Furthermore, this seasonal pricing means that utilities sell more power at the time of the year when they sell less power. This means:
-they have spare generation that they are not making money from
-the system has spare capacity and can absorb more power demand
This is true all over the country!
🔌⚡
-they have spare generation that they are not making money from
-the system has spare capacity and can absorb more power demand
This is true all over the country!
🔌⚡
Why should utilities offer large discounts on power during winter months? Because they sell A LOT more electricity 🔌⚡
March 12, 2025 at 9:57 PM
Why should utilities offer large discounts on power during winter months? Because they sell A LOT more electricity 🔌⚡
Minnesota ratepayers have a large discount on power usage during the winter half of the year and save a significant amount of money with heat pumps (unlike other states with disfavorable price ratios that don't have the same time of use pricing)
🔌⚡
🔌⚡
March 12, 2025 at 9:56 PM
Minnesota ratepayers have a large discount on power usage during the winter half of the year and save a significant amount of money with heat pumps (unlike other states with disfavorable price ratios that don't have the same time of use pricing)
🔌⚡
🔌⚡
Valuable carbon products as a second revenue source:
-One company generates black carbon and sells it to Goodyear as a tire input.
-Another makes graphene, which can be used in semiconductors, electronics, and batteries, and can sell for hundreds of dollars per kilogram.
🔌💡
-One company generates black carbon and sells it to Goodyear as a tire input.
-Another makes graphene, which can be used in semiconductors, electronics, and batteries, and can sell for hundreds of dollars per kilogram.
🔌💡
March 4, 2025 at 10:25 PM
Valuable carbon products as a second revenue source:
-One company generates black carbon and sells it to Goodyear as a tire input.
-Another makes graphene, which can be used in semiconductors, electronics, and batteries, and can sell for hundreds of dollars per kilogram.
🔌💡
-One company generates black carbon and sells it to Goodyear as a tire input.
-Another makes graphene, which can be used in semiconductors, electronics, and batteries, and can sell for hundreds of dollars per kilogram.
🔌💡
Process advantages:
-less energy intensive than electrolysis
-uses simpler machinery
🔌💡
-less energy intensive than electrolysis
-uses simpler machinery
🔌💡
March 4, 2025 at 10:09 PM
Process advantages:
-less energy intensive than electrolysis
-uses simpler machinery
🔌💡
-less energy intensive than electrolysis
-uses simpler machinery
🔌💡
Die Bedrohung der FPÖ gibt demokratischen Kräften eine zweite Chance zu handeln, und dadurch zugleich die FPÖ jetzt und in der Zukunft zu schwächen und Österreicherinnen und Österreichern zu zeigen, dass demokratische Parteien etwas liefern.
February 12, 2025 at 4:52 PM
Die Bedrohung der FPÖ gibt demokratischen Kräften eine zweite Chance zu handeln, und dadurch zugleich die FPÖ jetzt und in der Zukunft zu schwächen und Österreicherinnen und Österreichern zu zeigen, dass demokratische Parteien etwas liefern.
3/ WoodMac shows the same trend globally, albeit with only a 2 GW drop in new solar (495 GW in 2024 > 493 in 2025) 🔌💡☀️ Interestingly, that if both WoodMac and EIA are right, growth would otherwise increase globally and be negative only bc of the US.
www.pv-magazine-australia.com/2025/01/28/w...
www.pv-magazine-australia.com/2025/01/28/w...
January 28, 2025 at 4:33 PM
3/ WoodMac shows the same trend globally, albeit with only a 2 GW drop in new solar (495 GW in 2024 > 493 in 2025) 🔌💡☀️ Interestingly, that if both WoodMac and EIA are right, growth would otherwise increase globally and be negative only bc of the US.
www.pv-magazine-australia.com/2025/01/28/w...
www.pv-magazine-australia.com/2025/01/28/w...
There's a huge contrast between long/short term solar projections. Slowing growth next year and rapid growth in the next decade. 🔌💡☀️ By 2036, this model projects solar meeting 50% of global energy demand! (projects 10%/yr cost decline and 25%/yr deployment growth)
pv-magazine-usa.com/2025/01/15/m...
pv-magazine-usa.com/2025/01/15/m...
January 28, 2025 at 4:21 PM
There's a huge contrast between long/short term solar projections. Slowing growth next year and rapid growth in the next decade. 🔌💡☀️ By 2036, this model projects solar meeting 50% of global energy demand! (projects 10%/yr cost decline and 25%/yr deployment growth)
pv-magazine-usa.com/2025/01/15/m...
pv-magazine-usa.com/2025/01/15/m...
5- Costa Rica has a lot of hydropower and some geothermal so less wind/solar are necessary. This is the installed capacity by generation source:
🔌💡
🔌💡
December 30, 2024 at 10:24 PM
5- Costa Rica has a lot of hydropower and some geothermal so less wind/solar are necessary. This is the installed capacity by generation source:
🔌💡
🔌💡
Es gibt kaum ein besseres einziges Bild, um die österreichische Politik zu verstehen.
Wählerstromanalyse 2013>2017>2019>2024
Wählerstromanalyse 2013>2017>2019>2024
December 6, 2024 at 1:09 PM
Es gibt kaum ein besseres einziges Bild, um die österreichische Politik zu verstehen.
Wählerstromanalyse 2013>2017>2019>2024
Wählerstromanalyse 2013>2017>2019>2024