The economics of the Severn Barrage are flawed. The Barrage will be the most expensive form of renewable energy – even more expensive than offshore wind-farms. The Barrage will only generate power for 23% of each day.
Because the energy produced is dependent on the movement of the tides, energy production will peak when there is often little demand, causing chaos to existing power supplies. According to a recent report by The Renewable Energy Forum;
“Of all different technologies investigated the Severn Barrage proposal has the greatest capital costs”. “… the energy production costs of the Severn barrage is significantly greater than for the other generation (coal, gas, onshore wind, offshore wind and nuclear) sources”.
A recent study by Frontier Economics commissioned on behalf of the National Trust, the RSPB and WWF, amongst others, concluded that;
“…a large barrage on the Severn is expensive compared to alternatives ways of generating renewable electricity; and there appears to be sufficient capacity to use other technologies to meet… Government’s targets”.