Report crowns Solana for using least energy per transaction, but there's a catch
Solana (SOL), one of the most active proof-of-stake (PoS) blockchains, appears to be a PoS protocol consuming the lowest amount of electricity per transaction, according to a new report.
The Crypto Carbon Ratings Institute (CCRI), a research startup focused on the environmental impact of cryptocurrencies, released on Wednesday a new report calculating the electricity consumption and carbon footprint of major PoS blockchains.
The CCRI specifically analyzed PoS networks including Cardano, Solana, Polkadot, Avalanche, Algorand and Tezos.
According to the CCRI’s findings, the Solana blockchain consumed 0.166 watt-hours (Wh) of electricity per transaction within the study, becoming the most energy-efficient PoS protocol in terms of energy used per transaction among the six analyzed networks.
Cardano, a PoS network that has the biggest market capitalization at the time of writing, consumes the biggest amount of electricity per transaction, which is 52 Wh, according to the report. However, when it comes to a "per-node" comparison, Cardano uses the least amount of electricity per node, the CCRI found.
“This metric depends on the amount of transactions taking place on the respective blockchain, also the overall electricity consumption per transaction further depends on the number of nodes connected to the respective network. Generally, these numbers are expected to go down with an increase in the transaction rate, regardless which blockchain is in use,” the study reads.
Despite Solana’s low energy consumption per transaction, the PoS protocol still consumes a lot of energy due to the network’s massive usage, compared to other PoS networks. According to the CCRI’s study, the Solana blockchain emits 934 tonnes of carbon dioxide
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