The firm hopes to use the funding to help housing associations and the public sector to install solar systems on their building to help to lower their energy bills.
Over £22.7 million has already been handed out to over 1,200 projects by the DECC, with Dulas assisting on over a fifth of them to date.
Ian Draisey, director of Dulas, said: "This extra £7m is a timely boost for the team at Dulas.
"We recognise that the next six months will be crucial, and we are keen to make the most of this opportunity."
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