Solar II – When Energy Prices Go Negative

Texans should understand that we – despite our reputation for gas guzzling and oil drilling – are at the leading edge of the renewables-plus-battery-storage energy market in the country. We are likely to get to energy abundance here before anywhere else does.

How do we know we are at the leading edge? A few facts.

About half of the new battery storage capacity currently being built in the US is happening in Texas. Texas has 3.5 Gigawatts (GW) of storage capacity now, with the potential for about 10 GW installed by the end of 2024, or soon after. 

The Electric Reliability Council of Texas (ERCOT) manages the flow of electricity in the state and tracks certain records over time. If you’d like to feel optimistic about the energy transition and energy abundance, you can see all that data regarding these records online. 

Literally in mid-July ERCOT recorded its all-time record for solar energy generation.

Also June set the record for maximum wind energy generation

Meanwhile power storage usage hit a record in May.

Below I explain a bit about why utility-scale battery storage capacity is the key to tracking and understanding the growth and potential future impact of renewables. 

Texas’ Future Electricity Market – Look to Europe

European markets are ahead of the US in terms of electricity available from utility-scale batteries, with an estimated 36 GW compared to about 15 GW total in the United States at the end of 2023.

European markets have some lessons to teach us about what may happen with pricing and availability of electricity as solar and storage get built. It’s pretty exciting, although it comes with hiccups. 

Negative_electricity_prices_Australia
Electricity Prices Go Negative in South Australia when the sun shines brightly

One fact to know is that wholesale energy prices fluctuate throughout the day.

A second fact to know is that already-installed solar has close to zero marginal cost to generate additional power. You can’t turn off the sun, and electricity produced on bright days has to go somewhere. So producers have a need to offload electricity generated, somehow, into the grid.

Because of this need to offload power, In the middle of the day wholesale electricity prices approach zero or actually frequently turn negative, in certain markets where solar capacity has outstripped storage capacity. The number of observed “negative wholesale energy prices” days is rapidly increasing in Europe as well as in Australia.

This has been happening in Germany – the country with the most solar capacity in Europe – for a few years. It started happening in Spain in 2024. The country had prioritized solar production, but not battery storage. It actually kind of freaks them out

A negative wholesale electricity price literally means the producer will offer electricity for free or pay to offload energy. 

Utility-scale Battery Storage: A key to energy abundance

Energy market observers may remember the day on April 21 2020 – early COVID 19 pandemic days – when demand for fuel got so low that a refinery in Oklahoma was paying people to remove their physical oil in barrels. That’s sort of the analogy of negative electricity prices for solar. Somebody’s got to take the energy off the hands of the producer when there’s too much of it.

To be clear, extremely low or negative energy prices for solar producers are not great for the system. If you’ve built a solar plant but then spend many days of the year giving away your electricity for free – or worse, paying others to take it – that’s not good. In the long run this removes incentives to build more solar power generation and it could bankrupt producers.

In the short run, negative wholesale electricity prices are a big problem. In the long run, it’s a huge opportunity. In the long run there’s the possibility of extraordinary energy abundance. 

So who might be willing to be paid to take energy, or can receive free electricity during the middle of the day? Utility-scale battery storage operators. A low or negative wholesale electricity price for battery storage operators is amazing, as long as storage providers can resell that electricity into the grid a few hours later when the sun goes down.

Currently, Spain is scrambling to invest in battery storage. Texas seems to have already figured out the future need, and the buildout is happening now.

So what happens when utilities can access very affordable energy for significant hours of the day during a significant number of days of the year? It can’t help but keep demand and therefore prices for other energy sources in check. Solar and wind plus battery storage is nowhere near sufficient yet in Texas, but rapid growth means we should see some effects soon.

When we learn about this price-arbitrage trade of battery storage operators – store free energy from the sun and sell it a few hours later at a markup – we might be tempted to object: Profiteering! 

That’s probably the wrong response. Our best response is to celebrate those early profits, as they will lead to further solar and battery investment and further downward pressure on wholesale energy prices. Which eventually links to energy abundance as well as dampened consumer energy prices to keep our utility bills manageable.

“Energy transition” in 2024 has more to do with renewables making up a larger portion of the energy mix, even while both fossil fuel supply and demand continue to grow. The rapid growth of solar and battery storage is largely a move toward energy abundance and keeping prices low, more than reducing fossil fuel usage outright.

A version of this post ran in the San Antonio Express-News and Houston Chronicle

Please see related post

Solar I – Energy of the Future (and Always Will Be?)

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Solar: Energy of the Future and Always Will Be?

Shortly after I moved to Texas in 2009 I began to hear about the massive discovery of shale-based oil and gas deposits in South Texas and West Texas, plus improved horizontal-drilling technology and techniques. It all pointed to, and indeed was, an American onshore energy revolution. Since then the United States has become the dominant oil and gas producer in the world. This development has been extremely positive for the Texas economy and the US economy. 

Solar_cover_economist
Big claima last month from The Economist

As a markets guy, another thought I had back in 2009 was: “Welp! I guess solar and wind aren’t going to become price competitive for another generation?!” Fifteen years later, I still think that was the correct instinct. 

This is background to a bunch of dramatic claims made in late June from the ordinarily staid The Economist magazine, which declared that exponential growth in solar technology as an energy source is poised to change the world over the next decade.

All things being equal…

I’m not neutral on the issue of renewable solar power versus other sources, although I’m relatively industry agnostic. All things being equal, I like the idea of renewables more than fossil fuels. 

“Solar is the energy source of the future…” sounds like a claim I’ve been hearing since I was a kid in the 1970s and my parents installed some panels on our home’s roof. “…And always will be,” is the kiss-of-death epithet that has described solar since then, as compared to fossil fuels. 

All things have not been equal, and fossil fuels have remained cheaper and more reliable under all weather conditions as our primary energy sources through 2024.

Energy abundance should be the goal

What I really am in favor of is energy abundance, because it spurs economies, innovation, and leads to a wealthier and even more egalitarian society.  Energy abundance is why the simultaneous discoveries of the Eagle Ford shale and Permian shale deposits with improved horizontal drilling were good news (despite their role in delaying the attractiveness of renewables.) The hope for further energy abundance is why it would be amazingly good news if the growth of solar lived up to anything like the recent hype from The Economist

Points for techno-optimists on solar power:

So here are some techno-optimist points in favor of The Economist’s dramatic claims about the growth of solar. 

While the US currently depends on fossil fuels for 88 percent of its energy usage, renewables hit an all-time high at 8.8 percent last year, just now surpassing coal (8.7 percent.). 

The Economist further claims that while currently 6 percent of the world’s energy is supplied by solar, in a decade from now it may be the largest source of energy in the world. That’s a big claim for a relatively short time period. It would be revolutionary, if true.

Solar capacity worldwide has grown 23 percent per year for the last five years. Compounding effects at 23 percent make for huge future gains. When you apply high annual compound growth rates like that, mathematically the results over a decade are astonishing. From an admittedly low base, it’s the growth rates of both solar and battery storage that have people jazzed up. 

We should remember that the techno-optimist case for solar (as well as wind) relies on the concomitant growth in battery storage plants and technology. Utility-scale battery storage sites need to be deployed alongside solar and wind generating plants for when the sun don’t shine and the wind won’t blow.

So that is largely why The Economist claims “solar cells will in all likelihood be the single biggest source of electrical power on the planet by the mid 2030s,” just a decade from now. 

Of course continuous compounding growth – aka exponential growth – is hard to do in the real physical world, because of supply constraints. 

But there is some evidence even here in Texas that compound growth is actually happening. 

The evidence, in part, is utility-scale battery storage.

Economist Noah Smith has argued recently that the revolutionary technology of the next decade will not be AI, but rather the staid battery. Batteries – especially utility-scale battery storage of renewable energy – might just change everything.

Energy Information Agency

As of November 2023, Texas had installed utility-scale battery storage of 3.2 gigawatts, the second-most behind California’s 7.3 gigawatts. Texas’ battery storage capacity was roughly equal to all of the next 48 states combined. So that is a good start for the state. But we are getting better.

The US Energy Information agency listed the five biggest new construction battery storage projects in the US, of which four are in Texas. Each of these individual deals, bringing new storage capacity online in 2024 and 2025, is larger than any battery project currently operating in Texas. 

Then consider this data: The EIA in May 2024 lists battery projects in Texas currently under construction or completed but not yet operational with a total capacity of 5.4 gigawatts, representing 170 percent growth over our current capacity in the state.

Battery-storage capacity – the key to renewables’ growth – is roughly doubling each year in Texas, in the United States, and globally. 

Meanwhile solar projects in Texas with the same status as those battery storage projects in May 2024 – under construction or completed but not yet operational in 2024 – total 10.6 gigawatts.

Other important signs: According to a report by think tank RMI, battery costs have dropped 79 percent over the past decade. That same report points to global solar generation capacity doubling every 2-3 years for the past decade.

fka the Rocky Mountain Institute

The virtuous cycle needed for exponential growth depends on the simultaneous rapid drop in costs along with economies of scale and improved technology. 

Solar finally cheap enough?

“If it’s cheap, it shouldn’t need a subsidy” is a slogan I mostly endorse. Compared to fossil fuels, for the past few decades, renewables have not been cheap enough, without subsidies.

Of course, it’s theoretically fine to subsidize – and we have been subsidizing – future technologies that need a little extra boost to reach their full potential. But part of a true solar revolution – a 10x increase in usage from here – requires solar costs to beat fossil fuels under most scenarios. “Solar is the energy of the future…and always will be” is the fear of observers like me who think renewables should eventually be much cheaper, without subsidies.

Improved battery technology and massive increases in capacity provide the possibility that solar can finally be cheaper than fossil fuels. Fingers crossed.

A geopolitical cautionary thought: China is the absolute leader in technology and production of solar panels – running 80 to 90 percent of certain parts of the global supply chain. The government of China has, for strategic reasons, subsidized this dominance. 

The Biden administration just increased tariffs in May 2024 on solar cells from China from 25 to 50 percent, which in the best case scenario allows the US, or other Western countries, a chance to build competitive solar manufacturing capacity, but will raise prices on solar panels in the short and medium term. That’s a big potential bump in the road to exponential growth.

“Are we there yet?” is both an annoying question from the back seat during a summer road trip, and also a relevant question for futurists’ hopeful thinking around the rapid development of renewables capacity.

The Economist says we are there, yet. The data on Texas from the EIA says we are there, yet. Energy futurists suggest we are there, yet. With energy abundance as the goal, I hope that over this next decade we are there, yet.

A version of this post ran in the San Antonio Express News and Houston Chronicle

Please see related posts:

Book Review: The Green and the Black by Gary Sernovitz

The Natural Gas Revolution Part I – Mad Max Bizarro World in South Texas

The Natural Gas Revolution Part II- No Dry Wells in South Texas

The Natural Gas Revolution Part III – What a Fracking Site Looks Like

The Natural Gas Revolution Part IV – How Large is Large?

The Natural Gas Revolution Part V – The Labor Market

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Oil and Gas For The Little Guy

Editor’s note: Yeah Yeah Yeah I have the worst timing of all time. Still, the idea that this vehicle exists is important!

One of the regrets of my last ten years as a Northeasterner-turned-Texan is that I’ve only fulfilled some of the stereotypes. 

oil_and_gas

To be fair to me, I’ve accomplished important ones. I wear Lucchese boots. I wear bespoke guayaberas – shout-out Dos Carolinas! I am not yet, however, an investor in oil and gas. I say this with some wistful regret. I want to fit in as a real Texan.

I have recently discovered a possible way to correct this – the subject of the rest of this column – but I should start with a few reasons why I haven’t yet invested in oil and gas. The most obvious reason is that I don’t have enough money to be invited into large-scale opportunities. Next, I have no particular expertise that would assist me in oil and gas investing. Prudence suggests – and I always suggest – doing the simplest, low-cost investing thing that requires the least amount of knowledge. 

Oil and gas investments are famously opaque and high-cost opportunities – meaning if you buy into some heavily-promoted deal, it’s hard to avoid just funding a dry hole while paying many layers of fees to the operator or promoter, who makes money whether they are successful or not. The proverbial “heads you win, tails I lose,” kind of situation.

Having laid out some caveats – which hold true no matter what – I am intrigued by a Houston-based online platform called Energy Funders designed for the little guy (like me) to invest in oil and gas opportunities.

When you create an investor account on Energy Funders (as I did this month) you can access specific oil and gas exploration opportunities, with a minimum as small as $5,000. Garrett Corley, the VP of investor relations who called to vet me as an investor, says they average about one opportunity per month on their platform, with 34 deals closed to date.

CEO Casey Minshew says over the last five years they have been “Beta Testing” their thesis: That they can disrupt the closed, highly capital-intensive, and high fee world of oil & gas exploration, by giving access to smaller investors while reducing fees.

Minshew shared with me the results so far – involving 34 deals closed to date – as well as the direction he intends Energy Funders to go in the future.
Of 34 deals, 11 have been dry holes. Sixteen have produced appreciable oil and gas to date. Six of the deals, he considers, will be significant wins for investors. I did not independently verify his reported results, but those feel like results one should expect from high-risk investing, and therefore strike me as credible.

Minshew says that for this type of investment, small-dollar participants should split their money between a variety of projects, to lower their risk of failure on any one investment. 

Unlike the past five years, however, Minshew explained that the next few years will look a little different in terms of project style. Until now, Energy Funders has mostly backed so-called “wildcat”-style drilling, in which funders inevitably drill dry holes, but hope to have enough big winners to compensate for losses. 

Energy_Funders

Future capital raises on their Energy Funders will focus on lower-risk investing, through two methods. One is to create a portfolio approach to projects, allowing investors access to multiple drilling projects, for diversification purposes.

Their second risk-reducing plan is to open up access to “unconventional,” or horizontal drilling projects.  

For those familiar with oil and gas extraction lingo, you’ll know what that means. For the rest of us, conventional means drilling a traditional, vertical, hole in the ground.

The way you lose money in conventional is if your vertical hole is dry, with insufficient oil or gas available for extraction. 

Unconventional refers to horizontal drilling techniques and deep underground rock-formation smashing, known colloquially as fracking. The way you lose money in unconventional drilling is if the high cost of fracking exceeds the value of the oil and gas extracted – particularly if there’s too much gas and not enough oil. Success or failure is mostly a function of costs rather than dry holes. As an extremely general rule right now, gas is not profitable and oil is profitable, although markets obviously vary and will change in the future.

The project up on the site that I reviewed this week is one of their unconventional offerings, which has already been pumping oil and gas. The structure of that deal, as a result, offers less risk and less reward. But Minshew believes that’s increasingly what investors on their platform want. 

I don’t mean to endorse Energy Funders as an investment vehicle in particular because, again, I know nothing about oil and gas investing. But the theory seems plausible to me that a larger market exists for lower-risk, lower-return investments in oil and gas, especially among the smaller-size investors that Energy Funder’s online portal will appeal to.
Since at least 2014, margins in oil and gas exploration have been thin. But like any good entrepreneur, Minshew finds a silver lining in tough market conditions for drillers. As he says,

“It is a capital-starved environment right now. [Oil and gas operators] are now willing to play ball with us. Which is to remove fees and reduce prices.” In addition to drilling risk, fees are largely what has hurt small investors. But Minshew believes “The more and more capital starved the industry, the more valuable we will be.”
In other words, he believes drillers will value the money Energy Funders can raise that much more, and that they can negotiate relatively strong terms for participants. That strikes me as a plausible theory.
I’ve written about and invested in, music royalties in the spirit of democratizing access to previously closed markets.

I’ve also written about, but not invested in, customer loyalty-based funding at Houston-based NextSeed which offers little-guy investing opportunities in startups like bars and restaurants. Energy Funders investments are also a kind of democratizing platform, but  from a regulatory standpoint is only offered to accredited investors, who must meet a relatively high income or net worth threshold. While their investment minimums are very small – $5,000 – you do have to have some income or wealth to burn in order to participate. 

Final note. I understand that to many readers the idea of investing in oil and gas – in the age of climate change – is akin to investing in cancer. I disagree, but ok.

A version of this ran in the San Antonio Express-News and Houston Chronicle.

Please see related posts

How To Invest

My latest favorite investing idea – Music Royalties!

Crowd-Sourcing Restaurant and Bar businesses (to be posted shortly. SA-EN version here)


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Book Review: The Green And The Black by Gary Sernovitz

I’m always on the lookout for people who can hold diametrically opposed views in their head simultaneously. Is that why I enjoy Claire Danes in Homeland so much?[1]

Gary Sernovitz, the author of The Green and the Black, brings the perfect profile for diametrically opposed thoughts about the fracking boom, which is probably what we need to explore the oil and gas revolution of the past decade. He’s a self-described New York liberal, who works as a managing director of a private equity firm focused on oil and gas.

He’s deeply immersed in industry research, and he’s a good writer with a sly sense of humor.

He covers the environmental impact, financial impact, and the geopolitical impact of the shale revolution. He also clearly appreciates the capitalists at the core of the story, although often humorously for their mistakes and faults as much as for their tremendous success.

Environmental Impact

Since any conversation about fracking inevitably leads to an environmental fight, its worth noting Sernovitz quickly distances himself from a hardcore industry perspective.

“I believe the scientific consensus that climate change is happening now because of fossil fuels. The evidence for yet more changes is overwhelming. Climate change is a serious threat to human life. While I am more hopeful than most environmentalists that we can address these issues with technology, efficiency gains, and a cleaner energy mix, I believe that continuing to consume energy as we do will have terrifying effects over the coming decades.”

One central point of Sernovitz’ book, however, is that the environmental narrative of the fracking boom isn’t as simple as it’s frequently portrayed. Neither from the opponents’ side, such as was presented in the anti-fracking documentary Gasland, nor from proponents’ side, from industry.

gasland

It’s safe to say that each side of that debate considers the other side to be morons, which is never a great place to begin a discussion. Sernovitz is neither a moron nor an ideologue. Rather, he is someone who, while profiting from the oil and gas business and fracking in particular, has spent a tremendous amount of time thinking about opponents’ views.

To Sernovitz’ credit, he dedicates 49 pages to what he calls “The Local Perspective,” by which he means what an economist might call the environmental externalities of fracking. The open frack-water ponds, the worries about local drinking water, the possibility of leakage, the earthquakes.[2] Gasland, he argues, presented a simplified, non-scientific and non-representative propaganda piece about dangers to the drinking water, which is probably not the real big local environmental impact of fracking anyway.

He also dedicates 34 pages to what he calls “The Global Perspective” on fracking, which he short-hands as the “the Al Gore” worry, that the boom in cheap non-renewable hydrocarbons dooms us to a warmed planet and apocalyptic results. To his credit – and in line with my own fears about the biggest environmental impact of fracking – Sernovitz allows that he worries about this too. Our short-term pleasure at being able to drive huge SUVs at affordable pump-prices will be punished by the long-term irreversible damage we do to all living things by not switching to renewable, non-polluting energy sources, and possibly quite soon.

gary_sernovitz

Sernovitz’ articulated environmental hope, and one senses that he’s explored this angle deeply with concerned liberal foundation boards who want to invest with his company but also prefer not to wreck the planet, is that the ‘clean gas’ boom will be an intermediate weaning step away from dirty coal and onto the energy renewables in the future.

But he’s not such an ideologue that he’s sure:

  1. this will happen; or
  2. That the methane emissions from gas extraction wont prove, in the long run, as deadly to the planet as coal’s CO2 impact.

He concludes that we just don’t know enough yet about the methane problem to measure it against other alternatives. Meanwhile he holds out hope that gas isn’t all bad, when compared to its current alternative, coal.

Capitalist fun

Sernovitz clearly enjoys the story of capitalism working – innovation, mistakes, risk-taking, salesmanship, fortunes lost, fortunes won, and surprising global changes wrought, where they were least expected. He admires the pioneering spirit and grit that the early frackers showed. Elements of fracking techniques, including horizontal drilling and using liquids to open up closed shale rock, had existed for decades. But as Sernovitz explains, the right combination of techniques required much trial and error.

One story of The Green and the Black is how this combination of innovations and elimination of errors transformed the US from a forgotten has-been producer of expensive oil and gas into a leading supplier and global driver of far-cheaper oil and gas.

Picture_of_fracking

Sernovitz does not settle for the convenient anointing of far-seeing geniuses that many business books do. Instead, he acknowledges the role of extraordinary luck, as well as a we-had-no-choice-with-our-backs-up-against-the-wall decision-making of the fracking giants Aubrey McLendon, Mark Papa, Harold Hamm, and George Mitchell – who he anoints the four members of the Mount Rushmore of Fracking.

How financially valuable?

Sernovitz tries some back-of-the-envelope calculations of the income and wealth effects of the US fracking boom. Between 2007 and 2014, he estimates, the oil and gas industry netted $150 billion in additional income due to the shale revolution. More substantially, however, is the future wealth effect of making shale deposits a viable source of oil and gas. Between usable and estimated reserves, plus ancillary investments in pipelines, gathering systems, and export terminals, the wealth effect of the fracking boom probably adds up to $2 Trillion, according to Sernovitz. Which is quite a lot.

Other facts about the fracking boom also offer a sense of scale, such as the weird one that the size of the Bakken shale in North Dakota would give – at $60 per barrel of oil – a theoretical Nation of North Dakota a per capital oil wealth between four and five times bigger than Saudi Arabia. Whoa.

In my one-time adopted state of New York, where fracking was subject to a moratorium since 2008 and effectively banned since 2015, the technique and subsequent energy boom is a kind of shorthand for capitalist evil.

Where I currently live in South Texas, fracking may not be universally celebrated but even people who did not get rich from the recent boom have a sense that it has meant a huge economic shot in the arm for the region. Criticism tends to be muted, and, politically at least, a non-issue. People don’t need to shout “Drill, Baby, Drill” in South Texas because that’s going to happen anyway and it’s in fact against state law for municipal entities to restrict it. There’s no reason to shout about an activity that the entire political structure supports.

Geopolitcs

Sernovitz would like the layperson to understand not just the financial implications of the shale boom, but also the potential geopolitical changes wrought.

Here Sernovitz strikes a mostly optimistic note. Reduced dependence on frenemies like Saudi Arabia and Bahrain, and independence from more traditional enemies or rivals like Iran and Russia, he argues, makes the shale revolution a geopolitical gamechanger for the United States.

We will have less need to prop up kleptocracies or become partisans in places like South Sudan or Libya if we’ve got options, at a reasonable price, under our own land. This won’t stop the sea from rising and swamping our coastal cities, of course, but it is one less thing to disrupt the world.

Absence of traditional blame narrative

Have you ever had a conversation with a sub-prime mortgage CDO structurer about what he thought he was doing before 2007, creating a weapon of mass financial destruction? No? If you did, you’d understand the story is a bit more complex than the journalistic narrative. The products were not designed to be as toxic as they seemed, in retrospect. For reals, and I’m not being smirky as I write this, the underlying products were designed so that people with an imperfect credit history could buy a house. That was the real product, which we seem to forget. People in the sub-prime mortgage CDO production chain all had their own narrow self-interested job to do, but the underlying idea was not evil at all.

In that spirit, I appreciate Sernovitz’s frustration:

“It sometimes seems as if environmentalists believe that the oil industry’s business is to make carbon dioxide. Our business is to make fuel. Carbon dioxide is the by-product, the vast majority of which is emitted when people consume our products – in ‘your’ wheels, not ‘ours.’”

And then he continues,

“Yes, I believe that there is a moral difference between making money by producing oil and spending money by consuming it. I do not dispute that climate change is more on my conscience that on others.’ But that moral difference is subtle, subjective…”

I also appreciate Sernovitz’ position as a New Yorker surrounded by people who casually hate his industry. He does not have the luxury of unreflective one-sidedness. On the contrary, he is an expert ambassador for the industry living deep in enemy territory.

One of the problems with forming unbiased opinions on complex business topics is that true experts tend to come from within their own industry. And in that sense, may be discounted by critics as self-interested in defending the industry. But if you don’t listen to experts from the industry, you’re probably not listening to the most important experts on the situation.

Of course, at the end, I’m jealous of Sernovitz too.

He writes humorously and from a position of deep knowledge about an important finance topic. He writes about the big picture, as well as the minutia of his industry. He continues to make money with his expertise. Did I mention he’s funny as well?

Basically, I hate him.

Maybe I’ll get up the guts to ask him to do a podcast here.

The_Green_And_The_Black

 

Please see related posts:

All Bankers Anonymous Book Reviews In One Place

 

 

 

[1] Is that why I’m still a Catholic despite the ridiculous medieval bent to the Church’s teachings?

[2] Since I finished the book a week ago, earthquakes in Oklahoma have put the “seismic activity” problem of frack-water disposal back on the front burner. Ugh.

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Solar Industry: Love it, Hate it

solar_panels

I plan to install a solar array on the roof of my house.

Prior to installation, I asked a local solar expert guy to provide specific architectural plans, for my house. He provided estimates on monthly savings I could expect, based on my past energy usage as well as the specifics of my roof.

I love my spreadsheets (who doesn’t?) so I had fun calculating my ‘return on investment’ for a planned solar panel installation. I’ll mention the financial ‘return on investment’ I expect to receive a little further on in this column.

Having mentioned that I plan to install solar panels, there’s a real grumpy part of me that kind of hates the solar industry. Let me explain.

Solar Subsidies

I don’t know how much sense these industry subsidies make.

I start with an aversion to public subsidies for private gain, especially when the private gain will probably be captured by higher-income homeowners, because they are the ones who can afford to make multi-thousand dollar optional improvements to their home. Solar proponents will reply that the public gains broadly when we move toward sustainable energy and away from non-renewables. Financially, however, private households capture the monetary gain from the public subsidy, so it rubs up against one of my principles of private gain on the public dime.

Maybe even more worryingly, I have a pet theory that all the local and federal subsidies over the decades are actually inhibiting solar innovation. It’s relatively easy to read about all the ‘innovative’ solar technology coming down the pipeline. But I also kind of feel like we’ve been hearing about all this innovation since the Nixon administration, and residential solar still isn’t a good financial choice for households, if we removed all the government subsidies.

Some industries over the past forty years – think of advances in telephony, software, or computing power in that span – relentlessly innovate in a competitive market and produce stunning breakthroughs and extraordinary cost reductions. Solar power was not-quite-competitive with non-renewables in the 1970s and it’s still not-quite-competitive with non-renewables in the 2010s. Why is that? I can’t prove this, but I have a sneaking suspicion that an industry built around government subsidies will attract a different set of talents and mindsets than an industry built around market competition.

Which kind of begs the question: Are all the subsidies – in the long run – helping or hurting a faster shift to renewable energy?

I don’t mean to be overly harsh on solar power. Obviously, I’m installing it at my house. In general, I’m in favor of boosting our mix of renewable energy usage versus non-renewables, because that just makes sense. A billion years of future solar power versus even a few remaining centuries of oil & gas certainly argues for using more of the former and less of the latter.

Sustainable?

I’m a markets guy, however, and when an industry can’t become market-competitive over the years, it tends to just remain a niche player. Solar power is not yet – in a real markets sense – “sustainable.” As a markets guy I want to put on my Inigo Montoya accent to remind solar proponents who talk about solar power as “sustainable” to say “You keep using that word. I do not think it means what you think it means.”

inigo_montoya

The punchline

Ok, but can I make money installing panels at my house? I estimate that the annual return on my initial investment, after twenty-five years, would reach 6.3 percent. Theoretically, I could earn more than that, if I kept the panels installed for more than twenty-five years. On the other hand, I’ve learned the expected lifespan of the system is about twenty-five years, so it doesn’t make much sense to expect it to last longer than that, in my model.

Is that enough?

What do I think about a 6.3 percent return personally on investment in renewable energy?

It sounds about right, as a private incentive to invest my money. 6.3 percent easily beats what I can earn in a wholly ‘safe’ investment, like a bond or a money market account. It’s also a return on money above what I pay on my mortgage, so that it makes theoretical financial sense to outlay the money for solar panels, rather than just pay down my mortgage principal faster. 6.3 percent is below historical long-term returns from stock investments, but that seems ok too. With any more federal and city subsidy, my “private return on capital” might seem excessive.

Like any model, a large number of assumptions go into calculating a financial return on solar panel installation.

Assumptions

These assumptions include the following:

  1. I get my local utility rebate following installation as promised, which looks right now to total about 30% of the cost of installation.
  2. I get my 30% federal income tax rebate next year, as promised by the IRS.
  3. The solar production of the panels I install generate as expected.
  4. I use similar amounts of electricity in the future as I do now. Specific to my model, my energy needs only increase 1% per year.
  5. The price of energy (essentially the rates my utility charges me) only increases by 1% per year.
  6. The effectiveness of the panels in generating energy only degrades at 0.5% per year
  7. My costs of maintenance on the panels only runs about $120 per year.
  8. I stay in my house enough years to reap the benefits of installing panels. Specifically for my ‘annual return’ estimate, I stay in my house for twenty-five years.

If all those assumptions hold true – admittedly a pretty large set of ‘ifs’ – I’ll reap a pretty good private return on my capital.

 

A version of this appeared in the San Antonio Express News

 

Please see related posts:

Turtles All The Way Down

Natural Gas Revolution in South Texas

Oil companies – This Makes No Sense

 

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