The shadow energy secretary claimed Mr Davey had "ducked the challenge and gone awol".
Shadow energy secretary Caroline Flint called for "a complete overhaul of our energy market".
But Labour's Shadow Energy Minister, Tom Greatrex, said the announcement marked another delay for the projects.
BBC: Grangemouth and Peterhead make carbon capture shortlist
Shadow energy secretary Caroline Flint claimed ministers had shown "sheer incompetence" over the handling of the issue.
For the Conservatives, shadow energy and climate change secretary Greg Clark said Copenhagen had been a "flop".
For the Conservatives, shadow energy minister Charles Hendry said the bill was "fundamentally flawed" and a "blunt instrument".
Shadow energy secretary Meg Hillier welcomed the plans but warned they must provide "fairness and affordability for consumers".
But shadow energy secretary Caroline Flint insisted the government's "warm words" wouldn't "heat homes during a bitter winter".
Winding up the debate, shadow energy minister Emily Thornberry said the government had a "very difficult" job on energy.
Labour's shadow energy secretary Caroline Flint reiterated the party's support for nuclear power.
Shadow energy secretary Caroline Flint, for Labour, accused Mr Hayes of "playing politics" with clean energy jobs and the country's energy security.
For Labour, shadow energy secretary Meg Hillier dismissed Mr Huhne's pledges as "tinkering".
Shadow energy secretary Caroline Flint warned that "many firms currently providing solar are about to go to the wall".
BBC: Huhne: Policies will soften blow of rising energy bills
Shadow energy secretary Caroline Flint told delegates at her party's conference "the time has come to say goodbye to Ofgem".
Shadow energy secretary Caroline Flint said Mr Cameron had thrown energy policy into "confusion", causing "chaos" in the energy industry.
Shadow energy secretary Caroline Flint welcomed the decision to grant planning consent.
Shadow energy secretary Caroline Flint called on the government to use this as an opportunity to encourage investment in nuclear research and design.
But shadow energy secretary Caroline Flint said the changes could amount to a 70% cut in the feed-in tariff (FIT) subsidy in just six months.
Labour's shadow energy secretary, Caroline Flint, said that if the reports proved to be true, they "suggest shocking behaviour in the energy market, that should be dealt with strongly".
BBC: Gas prices-fixing probe: Government pledges firm action
Caroline Flint, Labour's shadow energy secretary, said that the plans failed to address issues such as excessive charges on private pensions, and costs affecting consumers such as high rail fares.
Caroline Flint, in her first Commons appearance as shadow energy and climate change secretary, said the government was right to carry out the investigation and that Labour welcomed its findings.
Caroline Flint, Labour's shadow energy and climate change secretary, said it was important for the UK to have an energy market that "delivers fair prices and works in the public interest".
Also on Twitter, shadow energy secretary Caroline Flint said she was happy for her former cabinet colleague and his family and made a joke about his nickname, saying "Thunderbirds are go".
Opening the debate, shadow energy secretary Caroline Flint said that instead of helping, ministers were "making things worse" as a result of their decision to cut the winter fuel allowance and subsidies for solar panels.
Shadow energy secretary Meg Hillier said she wanted a new electricity market to be "greener and create certainty for industry" and called for "a good deal for consumers, both as users of energy and as taxpayers".
The spat came during question time in the Commons on 7 January 2010 when shadow energy secretary Greg Clark claimed British consumers were paying more because the country lacked capacity to stockpile extra gas when prices were low.
Shadow energy secretary and Labour leadership contender Ed Miliband said "rather than pointing fingers", the best course of action was for a "proper investigation" to be held in order to "establish the responsibilities of BP, the other private companies involved and the American regulatory authorities".
Leicester were a shadow of the side who also won the EDF Energy Cup this term.
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