Energy regulator Ofgem has agreed an additional £3.3 million from companies SSE and UK Power Networks after an investigation into how they dealt with last year's winter storms.
The money will go to organisations that played a key role in helping vulnerable customers who suffered power loss.
The firms have already paid out £4.7 million and committed to improvements.
Severe weather over Christmas 2013 saw power cuts affect nearly a million homes and Ofgem has today put the industry on notice that any repeat of last year's performance issues will trigger further action.
Scottish and Southern Energy's payout totals £2.3 million to the British Red Cross, Age UK, National Energy Action, Macmillan Cancer Support, and to a new community fund.
Distributor UK Power Network totals paid £1 million to the British Red Cross, the Royal Association for Deaf People, Carer's Trust and Citizens Advice.