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Rating
4.8from
This podcast has
465 episodes
Language
EnglishPublisher
David RobertsExplicit
No
Date created
2021/01/12
Latest episode
2026/11/06
Average duration
62 min.
Release period
4 days
Description
Volts is a podcast about leaving fossil fuels behind. I've been reporting on and explaining clean-energy topics for almost 20 years, and I love talking to politicians, analysts, innovators, and activists about the latest progress in the world's most important fight. (Volts is entirely subscriber-supported. Sign up!) www.volts.wtf
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Check latest episodes from Volts podcast
Best of October 2026
2026/11/06
This is a free preview of a paid episode. To hear more, visit www.volts.wtf
Volts published eight conversations in October, which is a lot for anyone to listen to. We’ve rounded up the highlights into less than an hour. Enjoy!
Chapters
00:00 – Introduction
01:52 – Leah Stokes on passing the IRA
07:52 – Daniel Palken on the permitting bill
13:26 – Matt Traldi on local clean energy fights
19:38 – Kristian Jensen on Denmark’s utilities
24:56 – Nick Chaset on consumer protection
30:11 – Sam D’Amico on engineers and factories
35:41 – Tom Matzzie on the clean energy super PAC
41:19 – Ketan Joshi on data centers and climate
The transformative potential of solid-state transformers
2026/11/04
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
Power electronics have taken over almost everything in our lives, with the exception, oddly, of the power grid itself — it is still held together by tens of millions of analog, iron-and-copper transformers, the design of which has barely changed in a century. Solid-state transformers replace the dumb gray box with something that can monitor and steer power or convert it from AC to DC and vice versa. In this episode, Enphase co-founder Raghu Belur, who built his company by dividing big solar inverters into thousands of small ones, explains how he’s trying the same thing with transformers, why AI data centers and big solar and battery projects are the first markets, and what it would take to put a smarter transformer on every pole.
Chapters:
00:00 – Introduction
03:02 – What a transformer does
07:53 – What conventional transformers can’t do
11:43 – What makes a transformer solid state
15:27 – How much is software, how much is hardware
19:40 – Why power electronics hasn’t reached the grid
23:54 – Enphase’s distributed approach
31:23 – Building transformers from 5-kilowatt modules
34:58 – Copper, gallium nitride, and supply chains
43:44 – Cybersecurity
47:23 – Data centers and 800 volts DC
59:29 – Solar and battery storage
1:05:18 – The cost question
1:07:02 – Neighborhood transformers and the utilities
1:15:37 – Efficiency, lifespan, and heat
1:22:24 – Handling grid faults
1:25:27 – Standards, policy, and the next few years
The (climate) case against (AI) data centers
2026/10/30
This is a free preview of a paid episode. To hear more, visit www.volts.wtf
Volts guests have argued that data centers can be good for the grid if they’re built right. Here I hear the case against, from Ketan Joshi, a former wind-industry analyst who now tracks Big Tech’s climate claims. He sees data centers as the wrong kind of demand growth: lumpy, concentrated, unwanted by neighbors, and largely met with gas. Underneath it all is the worry that the backlash against data centers will become a backlash against electrification itself.
Chapters:
00:00 – Introduction
02:14 – How Ketan became a big tech critic
06:01 – The case against data centers
07:39 – What data centers add to emissions
11:57 – Isn’t more electricity demand good?
20:12 – Backlash and the NEXTDC power-pole protest
24:21 – AI claims 1: will AI help the climate?
27:53 – AI claims 2: machine learning vs. generative AI
33:47 – AI claims 3: inflated climate wins
36:51 – The gas rush: how much gets built?
44:49 – Would easier renewables fix it?
49:14 – Can data centers be flexible load?
55:41 – Do we actually want AI data centers?
59:39 – What should data centers do to plug in?
1:05:31 – Fake crackdowns and the risk to renewables
1:09:24 – What if AI is a bubble?
The PAC taking out clean energy opponents
2026/10/28
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
Clean energy is the cheapest, fastest-growing source of power in the country, yet politically it barely registers. Republicans gutted its tax credits last year without fearing any consequences. The Invest in Tomorrow Coalition, a super PAC backed by clean energy investors, is trying to change that the old-fashioned way: by punishing the industry’s enemies. It went six for six in this year’s primaries; it’s now spending at least $15 million against seven Republican House candidates in the midterms. Its chair, Tom Matzzie, makes the case for fear as a political asset, explains why the industry has been so slow to throw elbows, and describes what it would take for clean energy to become a lion instead of a gazelle.
Chapters:
00:00 - Introduction
02:55 - How the Invest in Tomorrow Coalition started
06:23 - Why a super PAC, and the idea of mythic power
09:50 - Punishing opponents to send a message to Congress
12:55 - Proving impact, and the permitting bill
17:13 - How ITC picks its general election races
21:41 - Does knocking out extremists help Republicans?
24:53 - Free riders and barriers to industry politics
28:58 - Who funds ITC, and why the industry underinvests
32:44 - Why clean power stays politically weak
38:28 - Did the IRA’s red-state investments pay off?
40:35 - Fear of Trump’s retaliation
45:05 - Avoiding the Democratic PAC label
49:30 - Presidential primaries and the ethanol playbook
53:20 - Gas inside the clean power trade groups
58:37 - Where ITC goes after November
Building our piece of the electric stack
2026/10/23
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
Collectively, the electric stack (batteries, motors, chips, power electronics) has gotten about 99% cheaper since 1990. It is quietly remaking every machine that turns electricity into motion, heat, or work. Problem is, China makes most of it. Sam D’Amico, co-author of “The Electric Slide” and founder of Impulse Labs, is betting the US can still claim a piece of that stack. He’s starting with a battery-powered induction cooktop. We talk about why domestic manufacturing matters, what America would actually have to build to compete, and how Silicon Valley’s founder world really thinks about climate change, geoengineering included.
Chapters:
00:00 – Introduction
02:52 – From VR headsets to kitchen appliances
07:07 – How a pizza oven inspired a battery stove
10:07 – Peak demand, at home and on the grid
13:25 – Which appliances could use a built-in battery
16:46 – Electric stack 1: the four technologies
20:28 – Electric stack 2: power electronics and motors
25:21 – China bets on hardware, the US bets on AI
30:08 – Why not just buy it all from China?
33:51 – Why engineers need to be near the factory
38:39 – How much does the US need to make at home?
45:19 – US EV policy and letting Chinese cars in
47:49 – Batteries in appliances vs. one home battery
52:04 – Impulse’s plan: its tech in other brands’ stoves
55:17 – What’s next after the stove
57:14 – Has Silicon Valley stopped caring about climate?
Can distributed energy work around American utilities?
2026/10/21
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
American homes are filling up with batteries, EVs, and smart thermostats that could be coordinated to make the grid cheaper and more reliable — but almost none of them are. To understand why, it helps to watch what happens when the company best in the world at this tries to do it here. In Britain, Octopus Energy has built a giant virtual power plant out of its customers' devices. In the US, it has spent six years running into walls. Now it’s bought Uplight, which runs customer programs for 85 utilities. I talked with Nick Chaset, who runs both, about what's in the way and whether distributed energy can ever scale with US utilities … the way they are.
Chapters:
00:00 – Introduction
02:02 – Octopus’s past year and the Uplight investment
05:18 – What makes the UK market work for Octopus
11:12 – Texas: fast growth, flattened volatility
14:57 – Will flexibility put itself out of business?
19:16 – Why Octopus stays out of Pennsylvania and New York
22:17 – Does residential retail competition have a future?
24:41 – Why utility programs trail Octopus on participation
32:17 – The demand stack and what planners can count on
39:11 – Kraken, Uplight and the overlap
46:04 – Consumer protection and the aggregator model
51:17 – Data centers and the social license to operate
55:11 – Do we need dynamic pricing?
58:30 – Five years out
What’s up with Denmark?
2026/10/16
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
Denmark gets a large share of its power from wind and other renewables and has cut its emissions roughly in half since 1990, but independent analysts doubt it will hit its 70 percent target for 2030. Kristian Jensen, CEO of Green Power Denmark and a former Danish minister of taxation, foreign affairs, and finance, argues the next stage is electrifying how Denmark uses energy: heat, transport, and industry. I talk with him about district heating and heat pumps, EVs and vehicle-to-grid, municipally owned grid companies and hourly power prices, biomass, carbon capture, power-to-X, solar’s “fields of iron” backlash, a grid oversubscribed with data center requests (an October 1 agreement has since put most data centers at the back of the queue), and whether the country’s political consensus will hold.
Chapters
00:00 – Introduction: Denmark and industrial symbiosis
02:44 – Is the 70% target for 2030 out of reach?
06:24 – Carbon capture and storage, and the peatlands lag
09:57 – Why electrification has lagged: biomass and wood pellets
14:45 – Few batteries, many interconnectors
16:48 – Data centers and the grid-connection prioritization bill
21:34 – Municipally owned grid companies
24:32 – Smart meters, hourly prices, and thermal batteries
28:40 – The solar backlash and local ownership
35:04 – Agrivoltaics and biodiversity
37:24 – District heating: heat pumps, geothermal, and finance
43:24 – The EV transition and vehicle-to-grid
47:45 – Road pricing and fiscal room
50:07 – Power-to-X and eSAF
54:21 – Can Denmark build enough clean power?
57:12 – Will the political consensus hold?
Checking back in with Greenlight America
2026/10/14
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
On this episode, recorded live at Climate Week NYC, I talk with Matt Traldi. He’s the founder and CEO of Greenlight America, which finds the local meetings where clean energy’s fate is being decided and recruits supporters to attend. Traldi argues that siting and permitting approvals turn on who shows up, and that local partners, conservative groups included, outperform outside advocates. We discuss how to measure impact, recent wins and losses, blue-state resistance, data center backlash, and Greenlight’s growth.
Chapters:
00:00 – Introduction
02:09 – What Greenlight does and why Matt started it
04:41 – How Greenlight finds the decisions that matter
07:27 – Growth, and the tax credit deadline sprint
13:38 – Who shows up to local hearings
19:39 – Winning in conservative communities
22:35 – Bodies in the room, measuring impact, and win rates
27:46 – Losses, wins, and “there is no bag”
32:44 – Blue-state obstacles and organized opposition
36:31 – When data center backlash spills over onto clean energy
42:31 – Which projects Greenlight won’t back
45:38 – Lessons from housing and growing an organization
50:17 – Audience Q&A: disinformation and state permitting reform
54:39 – Audience Q&A: developers and elections
59:30 – Audience Q&A: funding local groups and designing community input
What’s up with the new federal permitting reform bill?
2026/10/09
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
The proposed bipartisan federal permitting bill is 417 pages filled with extremely consequential provisions that have left the climate community some mix of excited, infuriated, and confused. In an attempt to bring some clarity, I asked Daniel Palken of Arnold Ventures, a veteran of Senate permitting fights, to walk through what’s in it. We cover the blockbuster transmission reforms, the rule making data centers pay more than their share of grid costs, the wins for geothermal, and the fossil carve-outs. Then we get into NEPA reforms that render the act toothless, limits on state water permits, and the permit-certainty sections that have lawyers worried about “forever permits.” And finally: whether it restrains Trump, why Democrats shouldn’t wait for a better deal, what the modeling says about emissions impacts, and Daniel’s odds of passage. This is a long one, folks. Buckle up.
Chapters:
00:00 – Intro: the bipartisan permitting bill
04:15 – Why permitting reform matters
12:23 – Agency staffing and capacity
16:59 – Past permitting attempts
20:26 – Transmission 1: planning and federal backstop
28:28 – Transmission 2: who pays and grid upgrades
38:17 – Data centers 1: paying more for grid access
43:20 – Distributed energy and geothermal
49:06 – Oil, gas, and mining provisions
57:06 – Data centers 2: will they go off-grid?
1:00:19 – NEPA 1: courts can’t halt projects
1:08:57 – NEPA 2: the main objections
1:17:10 – State water permits
1:23:35 – Endangered species
1:27:37 – Permit certainty 1: limits on revoking permits
1:36:43 – Permit certainty 2: lawsuits and damages
1:48:12 – Politics 1: Trump’s wind blockades
1:52:57 – Politics 2: why not wait for a better deal?
1:58:33 – Politics 3: elections, courts, and modeling
2:10:57 – Politics 4: next steps and odds of passage
The grueling fight to pass the Inflation Reduction Act
2026/10/07
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
On September 14, I sat down with Leah Stokes in front of a live audience at Seattle’s Town Hall to talk about her new book, The Carbon Wave. It’s an insider account of how the Inflation Reduction Act got made, braided with the story of the high-risk twin pregnancy she went through while helping to make it. We get into why electrification is the heart of decarbonization, the enduring mystery of what’s going on in Joe Manchin’s head, what it means to trade your carbon footprint for a carbon wave, and how much of the IRA survives. It was followed by questions from the audience.
Chapters:
00:00 – Welcome and housekeeping
03:05 – The twins, the NICU, and writing the book
08:51 – Carbon footprint vs. carbon wave
13:39 – Sam Ricketts and 100% clean electricity
18:13 – Why electricity is the core of the solution
23:28 – Utilities and the politics of change
26:18 – Tech companies and data centers
29:11 – Inside the Manchin negotiations
33:57 – Why Manchin got to yes
38:46 – Trump, setbacks, and where things stand
42:55 – Clean energy politics and the global shift
46:25 – Audience Q&A: the transmission gridlock
48:59 – Institutions, speed, and structural reform
53:27 – If Democrats win the House, what next
55:43 – Permitting reform
59:06 – State utilities, coal, and getting involved
Best of September 2026
2026/10/02
Volts published seven conversations in September, which is a lot for anyone to listen to. We’ve rounded up the highlights into less than an hour. Enjoy!
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
What’s up with heat-pump water heaters?
2026/09/30
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
Heat pump water heaters use a fraction of the energy of conventional electric resistance heaters — which use more electricity in a year than an EV — but they're only 2 percent of the market, mainly because they tend to cost more, be slow and loud, and require a plumber and an electrician. Reservoir is a Boston company trying to fix all that, with a smarter, quieter machine and its own plumbers. I talk with CEO Luke Winston-Almanzar about how it works, what it costs, and its potential role in demand response programs.
Chapters:
00:00 – Introduction
03:06 – Why water heaters
06:34 – How gas, resistance, and heat pump water heaters work
09:33 – Size and slow recovery: predictive heating and party mode
15:31 – Installation and vertical integration
22:19 – Cutting electric resistance backup
20:31 – What Reservoir builds and what it sources
23:41 – Tankless gas, virtual capacity, and the booster heater
27:11 – Recirculation, freeze protection, leak detection, and Legionella
32:03 – What it costs and what it saves
36:01 – Placement: small rooms, basements, and cold climates
42:37 – Noise and durability
48:19 – Demand response and virtual power plants
53:22 – A. O. Smith’s CO2 split system and Reservoir’s moat
55:54 – Policy headwinds after the IRA
59:29 – What’s next for Reservoir
Do small residential batteries make sense?
2026/09/23
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
Home batteries like the Tesla Powerwall are nice, but what about people who can’t afford them, or renters who aren’t allowed to install them, or people who just don’t want the hassle of dealing with a permit and an electrician? A company called Pila is selling small (1.6 kWh) batteries that simply plug into a normal electrical socket. They can serve as backup for a refrigerator or other appliance in the event of a blackout, but they can also “mesh” with one another to form a network, pair with rooftop solar, or participate in VPP programs. CEO Cole Ashman explains the value proposition.
Chapters:
00:00 Introduction
02:26 Lessons from Powerwall and Span
05:33 What Pila is and how it works
07:14 How long a fridge runs on one battery
09:28 Fire risk, LFP chemistry, and New York City
16:02 Why the price went up, and cost per kilowatt hour
19:55 Who is actually buying Pila
23:00 Financing models and free batteries
27:04 Do the bill savings add up?
32:05 Why utilities want small batteries in VPPs
36:58 Pilots with Holy Cross Energy and Brooklyn SolarWorks
41:09 Solar pairing and the Pila mesh network
47:14 Camping batteries and built-in storage
54:19 Utilities and visibility at the grid edge
55:58 Bidirectional outlets and the next five years
1:00:10 Clean energy as invisible infrastructure
How energy politics work inside DC
2026/09/18
This is a free preview of a paid episode. To hear more, visit www.volts.wtf
Back in 2011, I wrote that fossil fuel interests had a much better media game than clean energy. My example was Frank Maisano, a media relations guy for coal utilities and the natural gas industry. Thirty years on, he’s still at it — still writing his newsletter, still connecting reporters to sources, still better at it than anyone on the clean side (sigh). So I’m finally talking to him about it: clean energy trade groups nobody in Washington fears, Trump’s daft efforts to kill renewables, the PAC picking off dirty-energy Republicans, permitting and data center fights, and the climate denial shop he worked for in the ‘90s. Spoiler: he regrets nothing.
Chapters:
00:00 – Introduction
03:46 – What a DC media strategist actually does
09:50 – Republicans, Trump, and a narrow House majority
15:29 – Why tax cuts beat energy in the OBBBA fight
18:54 – Competing with China on AI without the electric stack
21:15 – Paying $4 billion to hand back offshore wind leases
28:07 – Red-state wind and the orders keeping coal plants open
32:52 – Clean energy trade groups and the building trades
38:41 – Gas as a bridge, and what longer term means
44:55 – Whether a half-gas trade group can serve clean energy
48:43 – A coherent clean vision against an incoherent coalition
51:14 – Do the green groups still scare anyone
55:18 – Permitting reform and the Whitehouse-Capito path
59:46 – Data centers, animal spirits, and the midterms
1:06:48 – The revenge PAC, and whether it is working
1:12:31 – Congress, the courts, and what Democrats could do
1:18:53 – COP, climate change, and the client he would turn down
How to build a more flexible, quieter, less obnoxious data center
2026/09/16
This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.volts.wtf/subscribe
Verrus is building data centers designed to address every objection the public has raised: they use batteries instead of diesel generators, which makes them grid assets that help hold down power prices; they use closed-loop cooling, which uses a tiny fraction of the water; their equipment is quieter; and as a bonus, they squeeze more servers into the same grid connection. Yet both of Verrus’s proposed sites, in Michigan and Oregon, are mired in fierce local opposition. In this episode, CEO Nelson Abramson walks through the engineering — and the politics that the engineering hasn’t quite solved.
Chapters:
00:00 – Introduction
02:43 – Three decades in data centers
05:05 – What a Verrus data center looks like
07:39 – The medium voltage power plane
12:13 – UPS batteries vs. the big LFP battery
17:27 – Priority aware capping and provisioned utility capacity
22:31 – Why not buy the pieces off the shelf?
25:42 – Duration: what happens when four hours runs out
34:28 – Diesel backup and what customers ask for
37:15 – How flexible is compute, really?
42:37 – Noise, fans, and the sound studies
48:42 – Water use and the 12 million gallon question
52:19 – Industrial land and by-right zoning
56:07 – Public opposition, recall petitions, and community benefits
1:00:07 – Oregon, Salem, and the moratorium
1:03:56 – Ride-through, NERC, and losing the moat
1:07:11 – What V2 looks like
Podcast reviews
Read Volts podcast reviews
Duke Crum 2026/10/09
Seems like stealth fossil fuel propaganda
The episodes often seem to be pushing fossil fuel interests in a stealth way. Bad show. The creators should feel bad.
Urbanism_forever 2026/09/19
A disappointing and confusing change in direction lately
I’m giving Volts a 1/5 because that’s the number of episodes that feel like they are worth listening to now. There has been a recent change in directi...
~ Violet ~ 2026/09/18
Confusing Agenda
I used to like this show but either it has changed or I’m listening closer … now it mostly seems like advertising and excuse making for the biggest en...
Some other Bill 2026/09/07
Favorite go-to podcast for green energy
The variety of people David Roberts interviews is amazing, and the depth and quality of information from almost all of his interviews just makes me wa...
dadlap 2026/09/06
how to respond to this information about Clean energy, at scale
hi David. My wife and I just finished listening to your interview with Leah Qusba.
Once again you found someone doing really important work and let e...
L Gandhi 2026/05/08
Simple explanations to help understand the complexity of energy
I recently became re-energized about working in the energy industry. This podcast has been incredible in getting me up to speed with the latest develo...
KIM KIRN 2026/04/30
Good news
My son and graduate school is studying international relations and recommended your podcast to me to understand the global electricity market ; since ...
LauraSJ 2026/04/05
Something’s Changing
About 5 years ago, I remember living with a conservation mindset. Don’t forget to turn the lights off. Monitor you home’s electricity usage (and read ...
Sunnycreek 2026/03/22
Love this podcast
I loved your latest podcast interview with climate activist Pete Sikora. I am from NY and losing my patience with Gov Hochul regarding clean energy m...
JTHSan Diego 2026/03/16
Superb Podcast
I always look forward to the volts podcast. It’s quite informative, entertaining and straightforward. The recent two part episode on the proposed new ...
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