The criticism follows yesterday's revelation that the UK is the world's biggest developer of offshore wind farms and the announcement of a major programme to accelerate their development.
Friends of the Earth renewable energy campaigner Nick Rau said that taking the lead was "great news". But he added that the UK is still near the bottom of the European league table for harnessing renewable energy.
"The Government must stop trying to wriggle out of European green energy targets and put a massive effort into making renewable power the number one source of energy in the UK," said Rau.
"The UK has one of the biggest renewable energy potentials in Europe - this must be harnessed to make this country a world leader in tackling climate change. This will help cut emissions, create hundreds of thousands of jobs and secure a clean, safe energy supply - leading Britain to a cleaner and more prosperous future."
The European Council is expected to decide its position on the EU Renewable Directive this week, which will commit Europe to generating 20% of its energy from renewable sources by 2020.
The UK will have to generate 15% of its energy from renewable sources by then, but Friends of the Earth said "compromise amendments" like excluding aviation would weaken the directive.