Christian Roselund
@roselund.bsky.social
Analyst, writer, and decarbonization wonk. #YIMBY and #energytransition advocate. @climateactionri.org co-lead: #yestowind campaign. Personal account: these opinions are mine, all mine.
Here for the launch event for @sueanderbois.bsky.social’s campaign for lieutenant governor of #RhodeIsland. It’s never been so easy for me to unequivocally endorse a candidate.
Why? /1
Why? /1
November 12, 2025 at 11:39 PM
Here for the launch event for @sueanderbois.bsky.social’s campaign for lieutenant governor of #RhodeIsland. It’s never been so easy for me to unequivocally endorse a candidate.
Why? /1
Why? /1
Note that New England #wind output has generally been quite strong in the first week of November, which is convenient: as solar generation declines and is limited to fewer hours of the day, wind is coming in to pick up (some of) the slack. 2
November 6, 2025 at 7:06 PM
Note that New England #wind output has generally been quite strong in the first week of November, which is convenient: as solar generation declines and is limited to fewer hours of the day, wind is coming in to pick up (some of) the slack. 2
Last Saturday, at 3:45 PM, #wind output on the ISO-New England grid hit a new record at 1.58 GW. This is after successively posting new records of 1.4 GW and 1.52 GW in October (16th & 31st).
The main driver here is undoubtedly more of the Vineyard Wind #offshorewind plant coming online. /1
The main driver here is undoubtedly more of the Vineyard Wind #offshorewind plant coming online. /1
November 6, 2025 at 7:02 PM
Last Saturday, at 3:45 PM, #wind output on the ISO-New England grid hit a new record at 1.58 GW. This is after successively posting new records of 1.4 GW and 1.52 GW in October (16th & 31st).
The main driver here is undoubtedly more of the Vineyard Wind #offshorewind plant coming online. /1
The main driver here is undoubtedly more of the Vineyard Wind #offshorewind plant coming online. /1
Remember that this is a crude monthly analysis. More research is definitely needed, including modeling hourly output & demand.
That will show the need for batteries and/or V2G.
New England is already close to generating enough #solar that we make gas plants redundant on cool sunny spring days. /23
That will show the need for batteries and/or V2G.
New England is already close to generating enough #solar that we make gas plants redundant on cool sunny spring days. /23
October 19, 2025 at 5:06 PM
Remember that this is a crude monthly analysis. More research is definitely needed, including modeling hourly output & demand.
That will show the need for batteries and/or V2G.
New England is already close to generating enough #solar that we make gas plants redundant on cool sunny spring days. /23
That will show the need for batteries and/or V2G.
New England is already close to generating enough #solar that we make gas plants redundant on cool sunny spring days. /23
Of course #solar is New England isn't sitting still, nor is wind in Maine. So let's look at a scenario w/ 14 GW of solar, 2 GW of land-based wind, and 3.4 GW of OSW.
That roughly balances the monthly portion of demand met in winter v. summer.
But you may have noticed those spring numbers.../16
That roughly balances the monthly portion of demand met in winter v. summer.
But you may have noticed those spring numbers.../16
October 19, 2025 at 4:32 PM
Of course #solar is New England isn't sitting still, nor is wind in Maine. So let's look at a scenario w/ 14 GW of solar, 2 GW of land-based wind, and 3.4 GW of OSW.
That roughly balances the monthly portion of demand met in winter v. summer.
But you may have noticed those spring numbers.../16
That roughly balances the monthly portion of demand met in winter v. summer.
But you may have noticed those spring numbers.../16
But the real use of this tool is to look at various scenarios. What if we build out all the OSW that we have all federal permits for (Vineyard, Revolution, New England Wind 1+2)? Then we get to ~3.4 GW.
Then we'd be meeting a higher portion of demand w/ renewables in the winter v. summer. /15
Then we'd be meeting a higher portion of demand w/ renewables in the winter v. summer. /15
October 19, 2025 at 4:27 PM
But the real use of this tool is to look at various scenarios. What if we build out all the OSW that we have all federal permits for (Vineyard, Revolution, New England Wind 1+2)? Then we get to ~3.4 GW.
Then we'd be meeting a higher portion of demand w/ renewables in the winter v. summer. /15
Then we'd be meeting a higher portion of demand w/ renewables in the winter v. summer. /15
If you've stuck with me this far, we get to the why of all of this. I plugged in all these numbers to get an estimate of how much demand we are meeting with solar, land-based wind, and #offshorewind in New England, by month.
Doing great in spring! OK in summer/fall. Not so much in winter. /12
Doing great in spring! OK in summer/fall. Not so much in winter. /12
October 19, 2025 at 4:17 PM
If you've stuck with me this far, we get to the why of all of this. I plugged in all these numbers to get an estimate of how much demand we are meeting with solar, land-based wind, and #offshorewind in New England, by month.
Doing great in spring! OK in summer/fall. Not so much in winter. /12
Doing great in spring! OK in summer/fall. Not so much in winter. /12
Because EIA State Electricity Profiles don't have monthly data I need, I had to use the "sales to end-use customers" from EIA Electric Power Monthly as a proxy. This is likely about 10% too low (line losses + self-gen), but good enough to show monthly patterns.
I only used the last 2 years here./10
I only used the last 2 years here./10
October 19, 2025 at 4:10 PM
Because EIA State Electricity Profiles don't have monthly data I need, I had to use the "sales to end-use customers" from EIA Electric Power Monthly as a proxy. This is likely about 10% too low (line losses + self-gen), but good enough to show monthly patterns.
I only used the last 2 years here./10
I only used the last 2 years here./10
For #offshorewind, I used the last 5 years of the Block Island Wind Farm. Unfortunately EIA only had 2 years that they disaggregated OSW in RI, so I used records provided by Walter Musial at NREL, with the last few months from EIA.
BIWF had the highest output in January, the lowest in July. /7
BIWF had the highest output in January, the lowest in July. /7
October 19, 2025 at 3:59 PM
For #offshorewind, I used the last 5 years of the Block Island Wind Farm. Unfortunately EIA only had 2 years that they disaggregated OSW in RI, so I used records provided by Walter Musial at NREL, with the last few months from EIA.
BIWF had the highest output in January, the lowest in July. /7
BIWF had the highest output in January, the lowest in July. /7
I used Maine wind as a proxy for New England land-based #wind. From what I can tell, Maine has a much higher capacity of land-based wind than any other state in the region.
Here the numbers show generally more wind in the winter, but the highest output in March, and the lowest in August. /6
Here the numbers show generally more wind in the winter, but the highest output in March, and the lowest in August. /6
October 19, 2025 at 3:54 PM
I used Maine wind as a proxy for New England land-based #wind. From what I can tell, Maine has a much higher capacity of land-based wind than any other state in the region.
Here the numbers show generally more wind in the winter, but the highest output in March, and the lowest in August. /6
Here the numbers show generally more wind in the winter, but the highest output in March, and the lowest in August. /6
I started off with the capacity factor (CF) of #solar. I used Massachusetts as a proxy for #NewEngland solar, because that's where the largest portion (most?) of the solar is and because it is around the north-south mid-point of where I expect solar to be deployed.
Behold: 5 years of CF data. /4
Behold: 5 years of CF data. /4
October 19, 2025 at 3:48 PM
I started off with the capacity factor (CF) of #solar. I used Massachusetts as a proxy for #NewEngland solar, because that's where the largest portion (most?) of the solar is and because it is around the north-south mid-point of where I expect solar to be deployed.
Behold: 5 years of CF data. /4
Behold: 5 years of CF data. /4
You know your movement is broad when the dirt bikers are on your side. /2
October 18, 2025 at 5:31 PM
You know your movement is broad when the dirt bikers are on your side. /2
Here at the #NoKings rally in #Providence, #RhodeIsland and we already have hundreds. More people streaming in all the time.
October 18, 2025 at 5:20 PM
Here at the #NoKings rally in #Providence, #RhodeIsland and we already have hundreds. More people streaming in all the time.
Good news: On Th night, the #NewEngland grid hit 1.41 GW of #wind output at 6:50 PM.
I think this is a new record; just a few weeks ago we celebrated hitting 1.3 GW.
This is likely more turbines at the Vineyard Wind #offshorewind plant coming online.
This will lower bills across the region. /1
I think this is a new record; just a few weeks ago we celebrated hitting 1.3 GW.
This is likely more turbines at the Vineyard Wind #offshorewind plant coming online.
This will lower bills across the region. /1
October 18, 2025 at 3:42 PM
Good news: On Th night, the #NewEngland grid hit 1.41 GW of #wind output at 6:50 PM.
I think this is a new record; just a few weeks ago we celebrated hitting 1.3 GW.
This is likely more turbines at the Vineyard Wind #offshorewind plant coming online.
This will lower bills across the region. /1
I think this is a new record; just a few weeks ago we celebrated hitting 1.3 GW.
This is likely more turbines at the Vineyard Wind #offshorewind plant coming online.
This will lower bills across the region. /1
Also: it's no longer just solar. It's solar plus storage. Nearly all solar projects in California and the Mountain West have batteries; but batteries are increasingly attached in other regions as well. Nationally 47% of solar projects have a battery component. /5
October 16, 2025 at 4:50 PM
Also: it's no longer just solar. It's solar plus storage. Nearly all solar projects in California and the Mountain West have batteries; but batteries are increasingly attached in other regions as well. Nationally 47% of solar projects have a battery component. /5
Excited that @berkeleylab.lbl.gov's 2025 data drop for utility-scale #solar is out. Among other things, it validates what I've said: #Maine and #RhodeIsland are the top states in terms of moving to #solar East of the Rockies.
Maine: 17.1% of load met with solar in 2024
Rhode Island: 16.4%
How?
/1
Maine: 17.1% of load met with solar in 2024
Rhode Island: 16.4%
How?
/1
October 16, 2025 at 4:37 PM
Excited that @berkeleylab.lbl.gov's 2025 data drop for utility-scale #solar is out. Among other things, it validates what I've said: #Maine and #RhodeIsland are the top states in terms of moving to #solar East of the Rockies.
Maine: 17.1% of load met with solar in 2024
Rhode Island: 16.4%
How?
/1
Maine: 17.1% of load met with solar in 2024
Rhode Island: 16.4%
How?
/1
National Guard in front of the Washington Plaza Hotel in DC milling around, obviously bored.
We all know why they are here: as a test run for 2029.
Hotel staff also resent this bullshit show of force.
We all know why they are here: as a test run for 2029.
Hotel staff also resent this bullshit show of force.
September 23, 2025 at 9:15 PM
National Guard in front of the Washington Plaza Hotel in DC milling around, obviously bored.
We all know why they are here: as a test run for 2029.
Hotel staff also resent this bullshit show of force.
We all know why they are here: as a test run for 2029.
Hotel staff also resent this bullshit show of force.
At the event Dr. Stephen Porder of Brown University spoke to the incredible possibility that for the first time in a million years we could move away of combustion for energy.
& @amandabarker22.bsky.social of @geconsumers.bsky.social laid out the case for why #RhodeIsland needs #offshorewind. /3
& @amandabarker22.bsky.social of @geconsumers.bsky.social laid out the case for why #RhodeIsland needs #offshorewind. /3
August 27, 2025 at 1:28 PM
At the event Dr. Stephen Porder of Brown University spoke to the incredible possibility that for the first time in a million years we could move away of combustion for energy.
& @amandabarker22.bsky.social of @geconsumers.bsky.social laid out the case for why #RhodeIsland needs #offshorewind. /3
& @amandabarker22.bsky.social of @geconsumers.bsky.social laid out the case for why #RhodeIsland needs #offshorewind. /3
Huge thanks to @peterneronha.bsky.social for taking time out of vacation to come talk about the work his office is doing to fight the illegal actions of Trump & co.
Similar thanks to @dawneuer.bsky.social and Rep. Lauren Carson for speaking to the state's work to mitigate the #climatecrisis. /2
Similar thanks to @dawneuer.bsky.social and Rep. Lauren Carson for speaking to the state's work to mitigate the #climatecrisis. /2
August 27, 2025 at 1:21 PM
Huge thanks to @peterneronha.bsky.social for taking time out of vacation to come talk about the work his office is doing to fight the illegal actions of Trump & co.
Similar thanks to @dawneuer.bsky.social and Rep. Lauren Carson for speaking to the state's work to mitigate the #climatecrisis. /2
Similar thanks to @dawneuer.bsky.social and Rep. Lauren Carson for speaking to the state's work to mitigate the #climatecrisis. /2
Great to see 100-150 people show up last night in Newport, #RhodeIsland to support the Revolution Wind #offshorewind project that the Trump Regime has illegally ordered to stop work.
#Trump is making war on our ability to decarb & contain high power prices & people in our state are mad as Hell. /1
#Trump is making war on our ability to decarb & contain high power prices & people in our state are mad as Hell. /1
August 27, 2025 at 1:17 PM
Great to see 100-150 people show up last night in Newport, #RhodeIsland to support the Revolution Wind #offshorewind project that the Trump Regime has illegally ordered to stop work.
#Trump is making war on our ability to decarb & contain high power prices & people in our state are mad as Hell. /1
#Trump is making war on our ability to decarb & contain high power prices & people in our state are mad as Hell. /1
Don't take my word for it; ask megaproject expert Bent Flyvbjerg, who looked at cost and schedule overruns for different classes of projects in his fantastic book How Big Things Get Done.
Nuke plants are rarely completed on time and often wildly over budget. /3
cleantechnica.com/2024/08/14/h...
Nuke plants are rarely completed on time and often wildly over budget. /3
cleantechnica.com/2024/08/14/h...
July 31, 2025 at 5:21 PM
Don't take my word for it; ask megaproject expert Bent Flyvbjerg, who looked at cost and schedule overruns for different classes of projects in his fantastic book How Big Things Get Done.
Nuke plants are rarely completed on time and often wildly over budget. /3
cleantechnica.com/2024/08/14/h...
Nuke plants are rarely completed on time and often wildly over budget. /3
cleantechnica.com/2024/08/14/h...
But note that while we have nearly 5 GW of solar (yellow, mostly behind-the-meter) cranking away, that we still are burning tons of gas and even ~460 MW of petroleum-fired power plants are running.
No bueno. We need a lot more #solar - and #energystorage - for summer peaks like this. /2
No bueno. We need a lot more #solar - and #energystorage - for summer peaks like this. /2
July 25, 2025 at 5:54 PM
But note that while we have nearly 5 GW of solar (yellow, mostly behind-the-meter) cranking away, that we still are burning tons of gas and even ~460 MW of petroleum-fired power plants are running.
No bueno. We need a lot more #solar - and #energystorage - for summer peaks like this. /2
No bueno. We need a lot more #solar - and #energystorage - for summer peaks like this. /2
Power prices are predictably high on the @iso-ne.com grid today; the temperature is currently 92F in both #Providence and #Boston. But note that while temps are expected to start to fall by 3 PM, the peak of prices (around $300/MWh) is 5-6 PM.
Why? #solar /1
Why? #solar /1
July 25, 2025 at 5:50 PM
Power prices are predictably high on the @iso-ne.com grid today; the temperature is currently 92F in both #Providence and #Boston. But note that while temps are expected to start to fall by 3 PM, the peak of prices (around $300/MWh) is 5-6 PM.
Why? #solar /1
Why? #solar /1
Here at the Energy Facilities Siting Board meeting for the SouthCoast Wind #offshorewind project, joined by some good friends from @climateactionri.org @cjnrc.bsky.social and @weareliuna.bsky.social.
#climatecrisis #yestowind
#climatecrisis #yestowind
July 23, 2025 at 10:13 PM
Here at the Energy Facilities Siting Board meeting for the SouthCoast Wind #offshorewind project, joined by some good friends from @climateactionri.org @cjnrc.bsky.social and @weareliuna.bsky.social.
#climatecrisis #yestowind
#climatecrisis #yestowind