He said Northland lines' companies Northpower and Top Energy have not been demanding a price increase but would be blamed for it anyway.
Mr Peters said the resultant increase in line charges would then be used by right-wing elements to demand the break up of energy consumer trusts, thus enabling private interests to gain access to the trusts' billions of dollars of assets.
"This is not even a sophisticated attempt but the crude face of irresponsible capitalism," he said.
Te Tai Tokerau MP Kelvin Davis said the proposed increase, if granted, would result in a hike in demand for social services in the region.
"Te Tai Tokerau is the most poverty stricken area in the country, where people are already struggling to heat their homes and cook for their families," he said.
The Green Party also waded in, saying the electricity grid was a national asset that benefited everyone and people should not be financially penalised because of where they live.
The party's Northland-based list MP David Clendon said the authority's proposals would see major industrial power users like the Tiwai Point aluminium smelter saving $50 million annually while households in Northland and the West Coast pay about 10 per cent more for their power.
"Families shouldn't be forced to switch off the heater or go off the grid so a taxpayer-subsidised smelter can benefit by tens of millions of dollars."