Power

Modernize power grids, scale energy storage and manage power demand

In a clean energy future, the power system will have a high quantity of renewables, adequate levels of storage and the ability to smooth out variations in output from wind and solar power. 

In order to cost-effectively supply the population with the electricity services needed for sustainable development, many elements must work together. Both supply and demand will need to adjust to a new and diverse energy mix. This includes scaling demand-side management; building new energy storage capacity; investing in modern, efficient power grids; and recognizing the importance of a more decentralized, flexible set of power assets, such as rooftop solar photovoltaic (PV). 

Adding more transmission and distribution infrastructure is an urgent priority, not only to connect those areas currently lacking reliable electricity, but also to move power from one location to another to improve reliability. 

Europe could achieve very high proportions of renewables with only around 25% more transmission infrastructure than what is available today. Africa and Asia may also adopt renewable energy based on micro and mini power grids with storage, if extending power lines is too costly in the short term.

Major changes are also needed at the demand-side of the power sector. Demand-side response (DSR) — the ability of electrical utilities to control and shift demands in real-time — is one of the most effective tools in stabilizing the variability in renewable energy. DSR techniques have existed for decades but new technologies make them more attractive, and they now need to be rolled out widely and across the world.  

Transitioning to zero-carbon power requires us to be able to store electricity, and also rethink how we manage our power grids and demand.

Energy storage technologies will also play a crucial part in the future energy system, though their environmental risks will need to be carefully considered and managed. Currently, there are around 180 gigawatts (GW) of storage deployed on grids around the world, the majority (94%) of which is pumped hydropower. 

Due to the lack of sufficient technical potential in some regions and environmental and geopolitical concerns of pumped hydro, alternative storages need to be developed rapidly, particularly battery storage and green hydrogen. 

Additionally, pumped hydro is threatened by climate change, as droughts and a shortage of rainfall reduce water availability for energy and storage purposes. Model results from the International Energy Agency (IEA) suggest an over 35-fold increase in battery storage capacity is needed to meet net zero by 2050.  

Scaling up efforts on power transmission and distribution, DSR and storage will require new policies to mobilize capital for new infrastructure, but also create the market conditions for demand management programs and technological innovation.

Data Insights

Is the world making enough progress toward the most important outcomes?

Systems Change Lab assesses progress made toward targets across 4 outcome indicators. Click a chart to explore the data.

What factors may enable or prevent change?

Systems Change Lab identifies 10 enablers and barriers that may help spur or impede change. Click a chart to explore the data.

Progress toward targets

Systems Change Lab tracks progress made toward targets across 4 outcome indicators. outcome indicator. Explore the data and learn about key actions supporting systems change.

Global potential flexible power demand

​​To cope with the inherent intermittency of key renewable energy technology, it’s crucial to make power grids more flexible. As of 2018, global flexible load totaled 4,000 terawatt hours.

To cope with the inherent intermittency of key renewable energy technology, it’s crucial to make power grids more flexible. Grid managers will need to be able to alter or shift demand in real time to match variable supply from wind and solar power.

For example, if renewable output is low, grid managers could incentivize consumers to shift their energy demand to a later time. Conversely, they could encourage consumption during periods with abundant renewable power. This group of strategies is referred to collectively as demand-side response (DSR).

While we do not yet have global estimates of trends in flexible power demands, we know that flexible demands are growing since grid managers and utilities are rapidly rolling out flexibility programs in the United States, Europe, Australia and other regions. As of 2018, global flexible load was estimated at 4,000 terawatt hours (TWh), which could increase to 7,000 TWh by 2040.

There is no established target for the proportion of power demand that must be flexible to align with a 1.5 degree C (2.7 degrees F) scenario, but it is clear that increasing flexibility can help integrate renewables onto the grid without major interruptions. Also, a more flexible power grid means we need less storage and transmission infrastructure, which are more costly and cause greater pollution.

Total energy storage capacity

In 2020, there were 17 GW of battery storage installed around the world. To achieve a 1.5 degrees C scenario, the IEA estimates that the world will need 585 GW of storage by 2030 and 3,100 GW by 2050.

Energy storage technologies will likely offer the most efficient solution to smooth the variability in renewable energy output. Countries will need to build out energy storage capacity once they reach higher penetration of renewables.

In 2021, total energy storage capacity stood around 188 gigawatts (GW). The majority of this was pumped hydro storage (160 GW), accounting for around 90% of all storage capacity. However, battery storages are rising rapidly. Installed capacity of grid-scale batteries reached 28 GW in 2022, concentrated largely in China, Germany, South Korea and the United States. Capacity is also beginning to grow in other countries, such as India. Battery storage is forecasted to make up the vast majority of new storage under net-zero scenarios. 

To limit warming to 1.5 degrees C (2.7 degrees F), the International Energy Agency (IEA) estimates that the world will need 585 GW of storage by 2030 and 3,100 GW by 2050. If the world reaches the level of zero-carbon electricity called for on this platform, it may require even more storage to balance variable output. There is not enough historical data to assess a trend for this indicator, so we are unable to assess how quickly the rate of change must accelerate to reach the 2030 target.

Total transmission grid capacity

Expanding the capacity of transmission lines is an urgent priority. The length of transmission lines across the globe increased from 2.9 million kilometers in 2006 to 4.8 million km in 2021. This growth is well off track and needs to accelerate by 7 times to meet the 2030 goal.

Transmission networks are the backbone of electricity systems, responsible for moving large amounts of electricity from where it is generated to where it is needed. Across the world, expansions in power generation capacity will need to be supplemented with significant build outs of transmission networks. This is vital for balancing the variability in renewable energy and to ensure that renewable assets are built in the best possible locations. 

Expanding transmission infrastructure can aid the global transition. Studies in the United States, Europe and the Middle East and North Africa have shown the value in those places, but transmission can benefit countries and regions across the globe. Because the grid can be balanced more efficiently, we can avoid the need for additional supply or storage infrastructure, which would be more costly and have more significant environmental impacts.

This indicator seeks to track the total capacity of transmission grids globally. The length of transmission lines across the globe increased from 2.9 million kilometers in 2006 to 4.8 million km in 2021. To meet climate goals, the length of transmission lines should expand to 15 million km by 2030 and 18 million km by 2050. Recent growth is well off track to meet the 2030 goal, and would need to increase 7 times faster to be on track.

Total distribution grid capacity

Distribution grids will be the lifeline of the sustainable energy future, and the global expansion of these networks is expected as renewable energy generation and energy access increase.

Distribution grids are a fundamental component of a power system. While transmission lines serve as highways in electricity grids, distribution lines are the networks of streets and roads that deliver power to people and businesses. In other words, distribution grids are the final link in the delivery of electricity.

To deliver a Paris Agreement-aligned clean energy transition, distribution grids will likely need to expand universally. However, building distribution grids will be most important in those regions that currently lack access to reliable electricity supplies. For example, evidence suggests that micro or mini grid systems could provide power in areas of sub-Saharan Africa where demand is too low for grid services and meeting a community’s aggregate power needs makes more economic sense than building standalone systems for each individual household.

This indicator seeks to track the total capacity of distribution grids globally. The length of distribution lines across the globe increased from 31 million kilometers in 2014 to 41 million km in 2021. To meet climate goals, the length of distribution lines should expand to 150 million km by 2030 and 190 million km by 2050. Recent growth is well off track to meet the 2030 goal, and would need to increase 9 times faster to be on track.

Enablers and barriers

We also monitor change by tracking a critical set of 10 enablers and barriers enabler or barrier that can help spur or impede change. Explore the data and learn about key actions supporting systems change.

New patents for energy storage

As of 2021, 15,456 claimed patents for energy storage were submitted, a 400% increase from 2000. This is a positive indication that storage players are operating and innovating in a stimulating market.

Renewable energy technologies, such as solar and wind, will form the backbone of the future energy system. Because supplies from renewable energy are inherently variable, we need to be able to store energy for use at a later time.

Achieving high proportions of renewables will require technological innovation in energy storage techniques to bring down prices. Advances are also required to ensure energy storage technologies are produced and operated sustainably, and can be disposed of or recycled with minimal environmental impact at the end of their life.

While technological innovation can be measured using a range of different approaches, we track the number of patents filed for a given technology. This method is a proxy for market innovation and progress for energy storage technologies.

The number of patents filed related to energy storage technologies have increased considerably since 2000. As of 2021, 15,456 claimed priorities for energy storage patents were submitted, a 400% increase from 2000. This is a positive indication that storage players are operating and innovating in a stimulating market. Because storage technologies are still maturing, businesses and governments will need to provide strong support to unravel latent innovation.

Number of countries with financial incentives for energy storage

Financial incentives, such as research funds to develop technologies or grants and subsidies to help finance the cost of infrastructure, will be necessary to make supply chains more efficient while keeping costs to consumers low.

Sustaining the clean energy transition at the pace needed to achieve our climate goals will require rapid and widespread deployment of energy storage. Currently, global storage capacity is a fraction of what is needed by 2030 to align the power sector with net-zero pathways.

Although the price of energy storage technologies continues to fall at unprecedented rates, it remains very expensive, particularly in the least developed countries, which could hinder progress.

Financial incentives, such as research funds to develop technologies or grants and subsidies to help finance the cost of infrastructure, will be necessary to make supply chains more efficient while keeping costs to consumers low. Such measures could turbocharge global adoption rates, which is vitally needed to meet net zero by 2050, according to the International Energy Agency (IEA).

Taking stock of the countries with financial incentives for energy storage is important to understand whether storage technologies are receiving the support they need, as well as the geographical hotspots of innovations. While there is currently insufficient data to comment on global long-term trends, early analysis indicates very few countries have financial incentives in place for energy storage, but there are signs this is increasing.

Number of countries with efforts promoting load-shifting measures

Load shifting is now more important than ever as power grids integrate additional amounts of variable renewable energy. Monitoring load-shifting roll outs not only allows us to track progress toward this transition, but also help to identify regions that are leading the way.

Running power grids is a constant process of balancing supply and demand. At times, demands (also called “load” in the power system) surge significantly and unexpectedly, and power grid managers need to be able to respond quickly to these changes. To do this, some grid managers implement load shifting, which is the process of moving energy demands to another period.

For example, large industrial consumers of electricity can make agreements with their local grid operators to shift their energy demands away from peak times, or even make a certain portion of their energy demand readily curtailable in exchange for preferential tariffs. Similar incentives can be rolled out for residential and commercial consumers.

Load shifting is now more important than ever as power grids integrate additional amounts of variable renewable energy. However, to increase the amount of demand that can be shifted, power grid managers will need to provide incentives — like cheaper tariffs — for customers to participate in load-shifting programs.

While there is currently no reliable global data on future flexibility needs, some estimates show that a nearly twelvefold increase in flexible demands could be needed by 2030. Therefore, it is important to track the number of jurisdictions or countries with policies that support load shifting. This would not only allow us to track progress toward this transition, but also help to identify regions that are leading the way.

Global investment in distribution grids

In many areas, distribution grids will be the lifeline of the sustainable energy future, and global expansion of these networks is expected as renewable energy generation and energy access increase.

How we move energy from where it is generated to its end use is an important part of the power system's transformation. Currently, the global power system is set up for a few large power plants, such as coal and gas plants, whose power is dispersed through large transmission line infrastructure.

This paradigm is beginning to change with the sustainable energy transition as a range of distributed power suppliers begin to appear, from large wind farm operators to micro solar sites. For many suppliers, a connection to large transmission infrastructure may not be needed, and instead, power can be best supplied with smaller distribution-scale grids.

In many areas, distribution grids will be the lifeline of the sustainable energy future. For example, there is evidence that large regions of Africa could economically close energy access gaps with micro or mini grid systems. These networks are expected to expand globally as renewable energy generation and energy access increase.

Global investments in distribution grids were in a state of gradual decline between 2016 and 2020. In 2016, $207 billion was invested in distribution systems across the world; this level of investment then decreased by an average of 2% per year, reaching $88 billion in 2020. However, recent data shows a notable uptick in spending: investments in 2022 amounted to $210 billion, the highest this figure has stood since 2015.

Although the level of growth required in the power distribution system in order to align with the Paris Agreement is uncertain, estimates forecast a threefold increase in the total infrastructure within the transmission and distribution sector by 2050. Investments therefore need to increase to ensure that energy access goals are met by 2030; this will also facilitate progress toward a low carbon energy system.

Global investment in transmission grids

In many parts of the world, the transition to renewable energy supplies will need to be supported with significant investments into the transmission network, primarily to upgrade or expand existing lines.

Transmission networks are responsible for moving large amounts of electricity from one point to another. In many parts of the world, the transition to renewable energy supplies will need to be supported with significant investments into the transmission network, primarily to upgrade or expand existing lines. This is vital for balancing the variability in renewable energy.

Improving transmission infrastructure can aid the transition in several regions, such as the United States, Europe and the Middle East and North Africa. Because the grid can be balanced more efficiently, we can avoid the need for additional supply or storage infrastructure, which would be more costly and have more significant environmental impacts.

Recent data show investments in transmission systems have fluctuated. In 2016, $130 billion of capital was allocated to transmission grids across the world, declining to $108 billion by 2020. However, recent data shows a notable uptick in spending: investments in 2022 amounted to $122 billion, the highest this figure has stood since 2018.

Tracking the global investment into transmission lines is important to understand the state of the energy transition. It is not only a good measure of investment priorities within a country, but also a sign of energy cooperation between states since transmission lines often cross borders.

Global investment in battery storage

In 2020, total global investment in battery storage stood at $6 billion; this amount increased ninefold to $54 billion in 2024. While these signs are encouraging, these investments still require large increases by 2030.

Battery storage technologies will form a vital component in the future zero-carbon power system. Large amounts of capital are expected to flow into storage solutions.

Monitoring the total investments into battery storage allows us to track the global investment priorities of governments and businesses, an important market signal of the clean energy transition. Over time, we expect this indicator to increase significantly.

Recently, annual investment into energy storage has risen substantially. Much of this growth has taken place in just the last few years. In 2020, total investment was just over $6 billion; this amount increased ninefold to $54 billion in 2024. The vast majority of the investments so far are from China, Europe and the United States.

While the importance of these signs cannot be understated, there is still a major gap in energy storage deployment. Since far more energy storage is needed by 2030 to align the global power sector with pathways compatible with the Paris Agreement, global investments in storage need to grow by 25% every year, according to the IEA.

Global investment in power grid resilience

Tracking investment into power system resilience is important to monitor how well prepared countries are for climate extremes, particularly the least developed economies that are most vulnerable to climate change.

Although mitigating climate change by decarbonizing the power sector is an urgent priority, existing power systems also need to be prepared for future climate shocks. Power systems are highly vulnerable to climate change, and because vast segments of the world’s economy are dependent upon electricity, climate-related power failures can pose devastating threats to global systems.

Investment in grid resilience is needed to prepare electricity grids for a changing climate. Adaptation options include building flood defenses around critical network components such as power plants and substations, making transmission lines more resilient to extreme temperatures and building network redundancy by increasing regional connections to cope with unexpected failures due to extreme climate events.

Tracking investment into power system resilience is important to monitor how well prepared countries are for climate extremes, particularly the least developed economies that are most vulnerable to climate change. However, no reliable and openly available data was found for this indicator.

Number of jobs in energy efficiency

An increasing number of jobs for workers across the clean energy supply chain reflects that moving toward a greener energy actually creates opportunities to access decent and productive jobs.

An increasing number of decent jobs for workers across the clean energy supply chain reflects that moving toward green energy can actually create opportunities to access decent and productive jobs across the clean energy supply chain.

These decent jobs must be quality jobs and ensure basic labor rights. It is essential that new employment opportunities provide men and women with decent work, meaning that they should offer fair compensation, safe working conditions, equal opportunities and social protections. These jobs must be free of forced and child labor and provide employees the right to organize or discuss work-related issues.

Globally, there were 10.7 million jobs in energy efficiency in 2022. At the country level, one estimate suggests that there are 33,000–62,000 efficiency-related jobs in Brazil, 60,000–236,000 in Australia, 472,000 in Canada, 730,000 in China, 2.4 million in the United States and 1–3 million in Europe.

Electricity grid permitting process duration

In many countries, regulatory procedures that permit the construction of electricity grids are too slow. This is preventing zero-carbon energy projects from connecting to the grid, slowing down the displacement of fossil fuel power generation. The average duration of permitting processes for electricity grids needs to fall sharply across the world.

Electricity grids are the backbone of any power system. They enable power to be moved from where it is generated to where it is needed. Building grids is a fundamental component of the energy transition not only because they will serve growing demands, but also because they enable the efficient integration and distribution of renewable energy sources.

Yet, the clean energy transition is currently being blocked by existing legislative processes that permit new developments of electricity grids. For example, evidence from the United Kingdom shows that 176 gigawatts (GW) of new capacity is currently in the queue for grid connection, compared with 64 GW of connected capacity today. The global grid connection queue poses a significant risk to the clean energy transition. Countries need to urgently reform their grid permitting processes, while also finding solutions to localized barriers that are currently preventing rapid grid development.

The purpose of this indicator is to monitor the average time required to complete the permitting process for grid connection projects country-by-country. There is currently no globally consistent data available. However, for a Paris-Aligned energy transition, this indicator should be falling rapidly.

Cost of energy storage technologies

Across technologies, the cost of energy storage has largely been decreasing for the past decade. Though the 2021 battery price was down nearly tenfold from that of 2010, more policy support for storage deployment, as well as research and development, is needed to further lower costs.

Energy storage technologies will form a critical component of a sustainable power system. Storage solutions help to smooth out the intermittency in renewable energy supplies caused by weather variability and the lack of solar power at night.

In order to realize energy storage at scale, we will need technologies that are affordable to purchase and operate. This indicator tracks the price of several key storage technologies. This analysis particularly focuses on the price of lithium-ion (Li-on) battery storage technologies, which is a relatively advanced and widely used technology, but other technologies such as pumped hydropower (the largest source of energy storage) and alternative battery chemistries (such as sodium sulfur batteries or vanadium redox flow batteries) are key to follow as well. However, new development of pumped hydropower is rare and alternative battery chemistries have  been slow to hit the market, so the trend in Li-on battery prices provides the clearest look into the state of energy storage prices today.

Li-on batteries for electricity storage can be installed near generation, along the transmission and distribution grid, or “behind the meter” (installed at the end-user for backup power). Residential storage prices declined from $3,349 per kilowatt hour (kWh) in 2013 to $1,649 per kWh in 2021. Similarly, prices for utility-scale storage declined from $1,659 per kWh in 2010 to $285 per kWh in 2021.

While prices of energy storage technologies have declined dramatically in recent years, many storage solutions remain expensive and are particularly unaffordable for emerging economies. To realize the level of storage proliferation needed to achieve a net-zero power system, more policy support for storage deployment, as well as research and development, is needed to further lower costs.

Photo credits

Photo by Arby Reed