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Greg Schivley

@gschivley.bsky.social
794 followers 398 following 180 posts

Energy systems data, code, hiking, bikes, and more. Building stuff in the ZERO Lab at Princeton.

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Greg Schivley @gschivley.bsky.social · 31/07/2026
I’ll check it out!
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Catalyst Cooperative @catalyst.coop · 29/07/2026
Hey #EnergySky we've created a couple of agent skills for exploring and working with PUDL metadata. If you'd like a more conversational interface to our metadata, give them a try! Links and a place to leave feedback here: github.com/orgs/catalys...
github.com
PUDL Agent Skills Feedback · catalyst-cooperative · Discussion #5444
We've created a couple of Agent Skills to help users navigate the hundreds of tables and thousands of columns of energy data that we publish through the PUDL project. These skills are agent-agnosti...
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Greg Schivley @gschivley.bsky.social · 11/06/2026
Literally in my backyard. Three very different races: the Wicked Tough 10k packs in 1,600' of gain, the 20k is mostly wide multi-use trail (still not flat), and the 50k hits all 6 major peaks with minimal overlap and 7,600' total. Views like these are what you're here for.
Sunrise view of Camden harborBlue sky and blue lake. View of Megunticook Lake from Maiden Cliff.
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Greg Schivley @gschivley.bsky.social · 11/06/2026
Come to Camden, ME for an awesome trail running race this September! The Megunticook Trail Festival has 10k, 20k, and 50k options. We're offering discounted room rates at our B&B for runners. Pre-race breakfast included and we'll have a post-race happy hour! www.blueharborhouse.com/promotions/m...
blueharborhouse.com
Megunticook Trail Festival 2026 — Stay & Run Package | Blue Harbor House Inn
Blue Harbor House Inn is an official sponsor of the 2026 Megunticook Trail Festival in Camden, Maine. Skip the tent — book our Stay & Run package for a special rate and pre-race breakfast. September 1...
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Greg Schivley @gschivley.bsky.social · 01/06/2026
So hit me up if you're looking for a vacation or team retreat and are interested in coming to Maine. We serve a pretty great breakfast and are excited to have fun conversations with more guests!
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Greg Schivley @gschivley.bsky.social · 01/06/2026
I've been busy exploring activities so we know what to recommend to guests! The schooner rides are a blast and I can personally vouch for some fantastic hikes right around Camden. It's a tough job 😉
Approaching Camden harbor on the schooner SurprisePurple wildflower in a meadowHiking trail through a hemlock forestView of Megunticook Lake from Maiden Cliff.
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Greg Schivley @gschivley.bsky.social · 01/06/2026
Amazingly, I've already had guests who work(ed) on nuclear engineering, vegetation management around transmission lines, and underwater transmission lines. Sunrise views here are also pretty amazing.
A view of Camden harbor from Mt. BattieSunrise view of a sailboat in Camden harbor
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Greg Schivley @gschivley.bsky.social · 01/06/2026
A couple months back my wife and I bought a B&B in Camden, Maine (blueharborhouse.com). It's a fantastic area, within walking distance of the ocean and mountains. I'm still working on energy system modeling at Princeton and would love to have people come up to visit!
blueharborhouse.com
Bed & Breakfast in Camden, Maine — Voted Top 5 in Maine
Blue Harbor House Inn is a boutique 10-room B&B in Camden with complimentary gourmet breakfast, homemade afternoon treats, and welcoming innkeepers.
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Emily Grubert @gruberte.bsky.social · 10/03/2026
🚨JOB ALERT🚨 Heya friends -- I'm looking for a postdoc! This time we're looking at the ethics of technology deployment for climate change mitigation. Full description in the link! Quick details: CVs and cover letters to me by 1 April; $75k/year for up to 21 months; remote within the US is ok.
emilygrubert.org
Research Team – Emily Grubert
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Anna Kramer @annackramer.bsky.social · 17/03/2026
NEWS: Six months before the Trump admin began bombing Iran, the Department of State fired its oil and gas experts. State’s energy division got completely DOGE’d. And with it went the people who knew how to plan for a global energy crisis.
notus.org
Trump’s DOGE Cuts Slashed Staff That Handled Middle Eastern Oil and Gas Crises
Six months before going to war in Iran, the U.S. government cut staff that would have been central to the current situation.
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David Ho @davidho.bsky.social · 16/03/2026
Things are apocalyptic for science in the US. It might not seem that way to everyone because many academic scientists have tenure and get to keep their jobs (for now), and most grants last three years, so many scientists still have funding. But it's going to get way worse.
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Ben Collins @bencollins.bsky.social · 14/03/2026
Judge Barbra Streisand presiding.
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Greg Schivley @gschivley.bsky.social · 12/03/2026
70's yesterday, snow today. Checks out.
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Michael Caley @michaelcaley.bsky.social · 10/03/2026
there it is @roryjohnston.bsky.social on Odd Lots walking through the practical, material effects of even a mildly extended stoppage of traffic through Hormuz as he says, it's so bad it's traditionally been used as a thought experiment for how bad things can get podcasts.apple.com/us/podcast/r...
podcasts.apple.com
Rory Johnston on How Oil Could Surge to Over $200 a Barrel
Podcast Episode · Odd Lots · March 10 · 37m
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Data Science Renee @becomingdatasci.bsky.social · 07/03/2026
Join me at the Applied Machine Learning Conference in Charlottesville, VA, April 17-18! We have great keynote speakers: @vickiboykis.com and David Luebke from NVIDIA, and the rest of the lineup will be announced, soon! Scroll down on the reg. page for various ticket options appliedml.us/2026/
appliedml.us
Applied Machine Learning Conference
A two-day conference bringing together data scientists, AI engineers, and ML practitioners in Charlottesville, VA. April 17-18, 2026.
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Taylor Lorenz @taylorlorenz.bsky.social · 03/03/2026
1908: the Lancet, one of the most respected scientific journals, calls for 18 age limit on reading in bed amidst a moral panic surrounding children becoming "addicted" to novels, which were "designed to keep kids hooked" and destroy their attention/mental health
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Catalyst Cooperative @catalyst.coop · 19/02/2026
Hey #EnergySky! This summer we are organizing a 2-day energy data lab for early career researchers from August 11-12 at Georgia Tech. It will be a mix of tutorials, open lab time, and networking. Applications are due April 3 – for more info, see our blog post: bit.ly/catalyst-dat...
bit.ly
Open Energy Data For All: Summer Data Lab 2026 - Catalyst Cooperative
Catalyst Cooperative has spent the last year or so developing educational materials for early career energy researchers, with generous support from the Sloan Foundation. We’ve created a set of interac...
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Greg Schivley @gschivley.bsky.social · 03/02/2026
Best heat pumps lists are great, but it's also good to know what to avoid. Can't say I love my Bosch system and I know someone else with a newer model who thinks it's too loud. @kyrib.bsky.social you also have a Bosch, right?
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isaac @sevier.io · 30/01/2026
This is why Emily, Josh, and so many others like us have been thinking and organizing for the necessary public ownership transitions that we _must_ put in place to succeed. We can both make sure we see the end of fossil fuels and make sure the phase out builds more justice, not more catastrophe.
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Greg Schivley @gschivley.bsky.social · 30/01/2026
Thanks for validating. Other details I know are Qcell 595 panels and expected CF of 14%. Apparently ME is ending community solar — I don’t blame them, retail credits for large ground-mounted is kinda crazy. Might be the last chance and it also qualifies for the ITC. Can’t hurt to call it out 🤷‍♂️
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Greg Schivley @gschivley.bsky.social · 30/01/2026
It’s ground mounted, south facing, 35°, in Maine. I’m looking at 10-20kW (offset small commercial use). I bet it’s still cheaper than Maine retail power, but paying rooftop rates for part of a project like this rubs me the wrong way.
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Greg Schivley @gschivley.bsky.social · 30/01/2026
@commercialsolarguy.com am I right to think that $3500/kW for a share of a ~1MW community solar farm seems steep?
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Greg Schivley @gschivley.bsky.social · 29/01/2026
What’s a reasonable price per kW for building 1MW commercial (community solar) these days? And how much should a customer expect to pay for buying a fraction of the project? #energysky
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Catherine Rampell @crampell.bsky.social · 10/12/2025
According to a new court filing, the Trump administration has a six-page list of banned words that Head Start locations are forbidden from using when describing their programs. Among the censored words: "disability," "race," "women," "trauma," "Gulf of Mexico." Short thread with the full list. 🧵
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Greg Schivley @gschivley.bsky.social · 01/12/2025
ReEDS has tx line capacity in both direction. Many cap expansion models use a single value. Better to use the avg or max? Max makes sense if power flows continue in the same direction. Any thoughts? @wilsonar.bsky.social @nworbmot.bsky.social @oetenergy.bsky.social @bistline.bsky.social 🔌💡
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Princess Vimentin PhD | Cancer Biologist @princess-vimentin.bsky.social · 21/11/2025
🧪Let’s set the record straight. AGAIN Andrew Wakefield’s paper was RETRACTED by The Lancet in Feb 2010.
Original paper published by Andrew Wakefield in 1998, retracted.
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Greg Schivley @gschivley.bsky.social · 17/10/2025
My new favorite bathroom sign
A bathroom gender sign with a mermaid on one side and a pirate on the other. Underneath it says “whatever, just wash your hands”
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Greg Schivley @gschivley.bsky.social · 08/10/2025
The #USRSE (research software engineering) conference wrapped up today. I was excited about 1) the number of undergrads attending, and 2) that there are already recent college grads working in the field. It's great to see the field expand beyond those of us with PhDs that stumbled into it.
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Greg Schivley @gschivley.bsky.social · 05/10/2025
X1 TLR here, not that I know the difference. More that I needed something wider (40mm) and with some tread for rides on rail trails with my daughter on the back.
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Greg Schivley @gschivley.bsky.social · 04/10/2025
Me, a rock climber: I have calluses on all my fingers. Me, after getting a new set of GravelKing tires on my bike: Oww, my thumbs hurt 🥺
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Paul Goldsmith-Pinkham @paulgp.com · 26/09/2025
statmodeling.stat.columbia.edu/2025/09/24/m... "Levitt was a University of Chicago professor, he has (by academic standards) nearly infinite resources, he could study whatever he wants, and he’s going for . . . clicks?"
statmodeling.stat.columbia.edu
More on the decline and fall of Steven Levitt | Statistical Modeling, Causal Inference, and Social Science
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John Bistline @bistline.bsky.social · 24/09/2025
NEW TOOL: a one-stop, searchable home for 250+ state energy and climate policies, targets, and incentives. Perfect for planners, policy-makers, and analysts. apps.epri.com/energy-polic...
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Greg Schivley @gschivley.bsky.social · 03/09/2025
Apparently EIA's method results in an over-smoothed distribution of energy across the year, especially for smaller dams. Figure from an earlier paper by the same authors showing how Hoover and Glen Canyon profiles are applied to other dams in the region. www.nature.com/articles/s41...
Paper figure showing that EIA's estimate of monthly generation at smaller hydro plants in the Mountain region can be wildly over-smoothed compared to a more accurate estimate. The EIA estimates are strongly influenced by the largest dams (i.e. Glen Canyon and Hoover).
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Greg Schivley @gschivley.bsky.social · 03/09/2025
Using dam release or streamflow is more accurate than surveyed plants. They provide generation estimates using both historical capacity (where plant cap has changed over time) and *current* capacity, which is useful for power system models representing today's capacity in historical weather years.
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Greg Schivley @gschivley.bsky.social · 03/09/2025
Just found out that EIA downscales annual generation to monthly at most hydro plants using a sample of surveyed plants. ORNL has a paper where they reconstruct monthly generation from 1980-2019 at plants >10MW using local proxies. #EnergySky @catalyst.coop www.nature.com/articles/s41...
nature.com
Forty-year hydropower generation reanalysis for Conterminous United States - Scientific Data
Scientific Data - Forty-year hydropower generation reanalysis for Conterminous United States
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Greg Schivley @gschivley.bsky.social · 27/08/2025
Living the dream. All 6 of biked to the beach!
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Greg Schivley @gschivley.bsky.social · 14/08/2025
If they're actually LIB, any reason to believe that charge rates are much lower than discharge rates? I wouldn't expect them to be but suppose they could be setting operational limits.
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Jesse D. Jenkins @jessedjenkins.com · 13/08/2025
Today on SHIFT KEY Summer School: how do electricity markets work? I give @robinsonmeyer.bsky.social a primer on marginal generators, bid curves, and capacity markets. Listen @heatmap.news or wherever you get your podcasts. 🔌💡
Shift Key Summer School podcast episode: how do power markets work?
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Greg Schivley @gschivley.bsky.social · 13/08/2025
#EnergySky I noticed that Idaho Power lists ALL of their existing/proposed storage units as flow batteries (FLB) in EIA860. They also show max discharge rates as 4-10x the charge rate. Duration is 4 hours in all cases. Anyone know if these are just LiB, or actually something different?
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Greg Schivley @gschivley.bsky.social · 31/07/2025
With Copilot and Claude 4 it finally feels like I have a tool that can take instructions (or vague ideas) and implement them in my code. I *could* have written a decorator that fills function args using dict values in a class singleton, but I would have taken days. Just did it in an afternoon 🤯
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Jason Burwen @jburwen.bsky.social · 31/07/2025
Anyone have a good analysis of the GW of potential gas plants by COD in the US, based on known gas turbine supply deliveries? #energysky
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Greg Schivley @gschivley.bsky.social · 23/07/2025
I'm digging into the EIA 860 Energy Storage file, where there are a bunch of columns that describe its application (arbitrage, frequency reg, backup power, etc). Values are "Y" or "PR". But PR isn't described anywhere! After some digging, I'm pretty sure that PR is "primary". You're welcome.
Questions 40a and 40b from EIA-860 Schedule 3, Part B. They ask what the primary and secondary application(s) are of the energy storage device.
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Greg Schivley @gschivley.bsky.social · 03/07/2025
It’s helpful to remember that not everything in the world is turning to shit. Last week my family went to Banff, which was absolutely incredible. Thanks Canada, for working to keep it wild.
Water cascades down a hill through trees, with a mountain in the background. Taken in Canmore. A Canadian flag waves in front of the sunset as seen from Sulphur Mountain. A black bear grazing in Banff. A panoramic view of Lake Minnewanka and the surrounding mountains.
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Greg Schivley @gschivley.bsky.social · 24/06/2025
Chasing fireflies with the kids was enough to get me sweating tonight. Then I realized the Porto/Al Ahly game was just up the road 🥵
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Costa Samaras @costasamaras.com · 18/06/2025
Later today, 12pm ET
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Greg Schivley @gschivley.bsky.social · 18/06/2025
75kWh also makes the fuel over $12/gal at residential rates. Not including whatever it costs to buy the unit.
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Alexandria Ocasio-Cortez @aoc.bsky.social · 17/06/2025
ICE just arrested Brad Lander, the NYC Comptroller and one of the leading candidates for Mayor, without grounds. He was conducting routine immigration court work, escorting individuals from hearings. He asked ICE for their warrant - well within his legal rights. This is political intimidation.
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Hannah Ritchie @hannahritchie.bsky.social · 16/06/2025
And again, the measles vaccine is estimated to have saved more than 90 million lives globally in the last 50 years. ourworldindata.org/measles-vacc...
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derek guy @dieworkwear.bsky.social · 11/06/2025
Not true. I see you're a luxury watch dealer. I'm also interested in watches. Let me show you how free and easy migration has allowed you to earn a living. 🧵
Corey Wiley on Twitter writes: "You don’t get it. 
Foundational immigration law is morally just and has been established over millennia. Disrespecting these rules and ideals is very offensive to folks who highly value civilized society"
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