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The Exponential View of Solar Energy

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The Exponential View of Solar Energy, and Why the Cost of Solar has Plummeted

The Exponential View of Solar Energy

The human brain is terrible at comprehending exponential growth.

Much like the power of compound interest is a magical force for investors, it is also possible for innovations and technological breakthroughs to build off each other in the physical world, creating a similar compounding effect.

In this chart, we look at how solar technology has surpassed all expectations from an economics perspective, including those initially set by the International Energy Agency (IEA). Then later, we’ll also look at a new set of predictions for solar energy economics over the next 30 years.

Solar Energy: The Technological Overachiever

Back in 2010, the cost of utility-scale solar power ranged between $0.25-$0.37 per kWh. This meant it was at least three times as expensive as fossil fuels, and that solar was highly cost-inefficient at the time.

Going forward, most organizations projected a linear path for whittling down the cost of solar.

The IEA, for example, forecast that the global cost of solar would drop to roughly $0.22 per kWh by 2020. In reality, however, the price dropped to about one-fifth of that at $0.04 per kWh.

YearActual (BNEF Global) - $ per kWh2010 Forecast (IEA) - $ per kWh
2010$0.28$0.36
2020$0.04$0.22
Change-85.7%-38.9%

Almost all industry forecasters, including the IEA itself, missed the exponential factors at play.

Wright’s Law

Ramez Naam, the co-chair for energy and the environment at Singularity University, points out in his blog that the exponential decrease in solar costs stem from Wright’s Law:

For most technologies, every doubling of cumulative scale of production will lead to a fixed percentage decline in cost of the technology.
-Wright’s Law

Professor Naam says this occurs through “learning-by-doing”, and more specifically:

  1. Innovation that improves the technology itself
  2. Innovation that reduces the amount of labor, time, energy, and materials needed to produce the tech

Put another way, the more solar panels we make and the more we install—the better we get at the whole process over time. And once we’re making thousands or millions of panels, the costs come down exponentially, much like with lithium-ion batteries.

The Future of Solar Costs

Over the years, Naam has taken his own stab at forecasting the cost of solar energy into the future, leveraging the idea of Wright’s Law.

Here’s what he sees coming, based on using a 30% learning rate* for solar:
Future cost of solar based on 30% learning rate Wright's Law

*The learning rate is the fixed percentage decline that occurs with every doubling of the scale of production.

Based on these projections, even the costliest of solar installations will be more economical than the cheapest of utility-scale fossil fuel plants. This means solar can basically go anywhere, and make sense from a cost perspective.

Underestimate Solar No More?

For fun, here’s a final look at how IEA projections have constantly underestimated solar installations, which are one of the key factors dictating the “learning rate” under Wright’s Law:

missed iea solar capacity forecasts

With solar energy costs plummeting to record lows and global installations continuing to ramp, it’s possible that solar forecasters may no longer forget about the exponential nature of solar production.

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Electrification

Will Direct Lithium Extraction Disrupt the $90B Lithium Market?

Visual Capitalist and EnergyX explore how direct lithium extraction could disrupt the $90B lithium industry.

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Will Direct Lithium Extraction Disrupt the $90B Lithium Market?

Current lithium extraction and refinement methods are outdated, often harmful to the environment, and ultimately inefficient. So much so that by 2030, lithium demand will outstrip supply by a projected 1.42 million metric tons. But there is a solution: Direct lithium extraction (DLE).

For this graphic, we partnered with EnergyX to try to understand how DLE could help meet global lithium demands and change an industry that is critical to the clean energy transition.

The Lithium Problem

Lithium is crucial to many renewable energy technologies because it is this element that allows EV batteries to react. In fact, it’s so important that projections show the lithium industry growing from $22.2B in 2023 to nearly $90B by 2030.

But even with this incredible growth, as you can see from the table, refined lithium production will need to increase 86.5% over and above current projections.

2022 (million metric tons)2030P (million metric tons)
Lithium Carbonate Demand0.461.21
Lithium Hydroxide Demand0.181.54
Lithium Metal Demand00.22
Lithium Mineral Demand0.070.09
Total Demand0.713.06
Total Supply0.751.64

The Solution: Direct Lithium Extraction

DLE is a process that uses a combination of solvent extraction, membranes, or adsorbents to extract and then refine lithium directly from its source. LiTASTM, the proprietary DLE technology developed by EnergyX, can recover an incredible 300% more lithium per ton than existing processes, making it the perfect tool to help meet lithium demands.

Additionally, LiTASTM can refine lithium at the lowest cost per unit volume directly from brine, an essential step in meeting tomorrow’s lithium demand and manufacturing next-generation batteries, while significantly reducing the footprint left by lithium mining.

Hard Rock MiningUnderground ReservoirsDirect Lithium Extraction
Direct CO2 Emissions15,000 kg5,000 kg3.5 kg
Water Use170 m3469 m334-94 m3
Lithium Recovery Rate58%30-40%90%
Land Use464 m23124 m20.14 m2
Process TimeVariable18 months1-2 days

Providing the World with Lithium

DLE promises to disrupt the outdated lithium industry by improving lithium recovery rates and slashing emissions, helping the world meet the energy demands of tomorrow’s electric vehicles.

EnergyX is on a mission to become a worldwide leader in the sustainable energy transition using groundbreaking direct lithium extraction technology. Don’t miss your chance to join companies like GM and invest in EnergyX to transform the future of renewable energy.

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Electrification

Chart: The $400 Billion Lithium Battery Value Chain

In this graphic, we break down where the $400 billion lithium battery industry will generate revenue in 2030.

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EnergyX_Breaking-Down-the-Battery-Value-Chain

Breaking Down the $400 Billion Battery Value Chain

As the world transitions away from fossil fuels toward a greener future, the lithium battery industry could grow fivefold by 2030. This shift could create over $400 billion in annual revenue opportunities globally.

For this graphic, we partnered with EnergyX to determine how the battery industry could grow by 2030.

Exploring the Battery Value Chain

The lithium battery value chain has many links within it that each generate their own revenue opportunities, these include:

  • Critical Element Production: Involves the mining and refining of materials used in a battery’s construction.
  • Active materials: Creating and developing materials that react electrochemically to allow batteries to charge and discharge.
  • Battery cells: Involves the production of rechargeable elements of a battery.
  • Battery packs: Producing packs containing a series of connected battery cells. Generally, these come in two types: NMC/NMCA, the standard in North America and Europe, and LFP, the standard in China.
  • Recycling: Reusing battery components within new batteries.

But these links aren’t equal, each one is projected to generate different levels of revenue by 2030:

China 🇨🇳Europe 🇪🇺United States 🇺🇸Rest of World 🌍
Total$184B$118B$62B$39B
Critical Element Production$37B$25B$15B$8B
Active Materials$54B$31B$14B$11B
Battery Packs$34B$22B$11B$7B
Battery Cells$53B$37B$20B$11B
Recycling$6B$3B$2B$2B

On the surface, battery cell production may contribute the most revenue to the battery value chain. However, lithium production can generate margins as high as 65%, meaning lithium production has potential to yield large margins.

How Much Lithium Is Available?

Just a few countries hold 81% of the world’s viable lithium. So, supply bottlenecks could slow the growth of the lithium battery industry:

NationViable Lithium Reserves (2023)
Chile 🇨🇱9.3M t
Australia 🇦🇺6.2M t
Argentina 🇦🇷2.7M t
China 🇨🇳2M t
U.S. 🇺🇸1M t
Rest of World 🌍4.9M t

Supplying the World With Batteries

Supplying the world with lithium is critical to the battery value chain and a successful transition from fossil fuels. Players like the U.S. and the EU, with increasingly large and growing lithium needs, will need to maximize local opportunities and work together to meet demand.

EnergyX is on a mission to become a world leader in the global transition to sustainable energy, using cutting-edge direct lithium extraction to help supply the world with lithium.

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