The government must commit to tidal energy or risk a significant energy shortfall, the Electrical Contractors Association has said.
The trade body said it was vital the government invested in the proposed lagoons to “help Britain keep the lights and everything else on”.
The comments came in the ECA’s response to the government’s review looking into the future of tidal energy in the UK.
Former energy minister Charles Hendry is leading the review, which will assess the cost-effectiveness of tidal projects as part of the UK’s energy mix.
The ECA response said tidal lagoons offered the “complete package” of “long lifespan, high flexibility and high energy predictability”.
Tidal Lagoon Power is proposing six tidal lagoons along the west coast of the UK, with the first one planned at Swansea Bay.
The Swansea Bay Tidal Lagoon will provide power for more than 155,000 homes, with all six lagoons set to provide 8 per cent of the UK’s current energy demand when fully operational.
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ECA director of business Paul Reeve said: “To help Britain to keep the lights – and everything else – on, the UK desperately needs investment in predictable renewable energy capacity.
“A key part of the UK’s low-carbon energy mix has to be renewables, and tidal power offers the opportunity for Britain to be world leaders in this increasingly attractive route to electrical energy production and energy storage.
“The ECA urges the government to show its commitment to energy security and tackling climate change by supporting a potentially game-changing renewable energy sector in Wales.”