Cryptocurrency has long faced scrutiny over its environmental footprint, but a recent study from the Cambridge Centre for Alternative Finance paints a much greener picture for Ethereum. Following its historic September 2022 “merge”—which shifted the network from a power-hungry proof-of-work model to a proof-of-stake (PoS) consensus mechanism—Ethereum’s electricity usage plummeted by a staggering 99.96%. Now, policymakers and investors finally have a detailed look at the blockchain’s modern sustainability metrics, revealing that Ethereum sits comfortably at the lower end of energy intensity compared to its top competitors.
How Ethereum Compares to Other Proof-of-Stake Networks
While Ethereum still consumes a significant amount of electricity overall, its efficiency relative to its massive market size is impressive. The Cambridge researchers estimate that the Ethereum network requires roughly 7.87 gigawatt-hours (GWh) of electricity every year. However, when adjusted for market value, Ethereum uses just 33 kilowatt-hours (kWh) per $1 million of market value. This makes it the second-most efficient network among the proof-of-stake blockchains evaluated, trailing only behind the BNB Chain.
In stark contrast, Solana was found to be the most power-intensive network in the study, burning through about 13.48 GWh annually. When adjusted for market value, Solana’s energy intensity sits at roughly 283 kWh per $1 million—making it roughly 8.5 times more energy-intensive than Ethereum. To put the broader proof-of-stake ecosystem into perspective, all the major networks analyzed in the Cambridge comparison consume a combined total of about 38 GWh per year.
The Power Draw and Environmental Impact of Ethereum Nodes
Ethereum’s dramatic drop in power consumption stems directly from replacing traditional crypto miners with validators, who secure the network by staking their Ether rather than running racks of heavy computing hardware. By measuring the electricity used by network nodes at the point of connection, Cambridge found that a typical home validator setup draws only about 18 watts of power, while a heavy-duty workstation uses around 153 watts. Blending this mix of residential and professionally hosted setups, the average power draw comes out to a highly efficient 105 watts per node.
The researchers tracked approximately 8,522 discoverable full nodes operating on the network to calculate these figures. They discovered that the majority of these nodes—about 64 percent—are hosted in enterprise or cloud facilities, while the remaining 36 percent run on standard residential connections. Because the hardware itself is now so efficient, Ethereum’s remaining carbon footprint is largely determined by local power grids. Fortunately, the study estimates that the network leans green, with 56.4 percent of its electricity coming from renewable and nuclear sources, compared to 43.6 percent relying on fossil fuels.
