The County Hall leader has claimed Norfolk is "under attack" from solar farm developers after a series of applications were put in to cover thousands of acres of farmland in panels.
Kay Mason Billig described the plans as "deeply disturbing" and a "creeping abuse" of the countryside and said the county should resist them.
Norfolk County Council's Conservative leader was speaking after energy companies unveiled separate plans to create the UK's largest two solar farms in Norfolk.
One, called High Grove, would cover 4,000 acres of land on five sites close to Dereham and Swaffham, on either side of the A47.
The second, East Pye, would cover 2,700 acres on 34 fields surrounding several villages close to the A140 near Long Stratton.
If they go ahead, High Grove would be nearly 16 times larger than the current biggest, while East Pye would be six times larger.
Their backers believe the farms are a vital part of the UK's efforts to meet its highly ambitious net zero targets.
But the proposals have already drawn strong criticism, with fears raised about the loss of farmland as well as the cost and efficiency of the sites.
Mrs Mason Billig announced her opposition at a meeting of Norfolk County Council on Tuesday.
Mrs Mason Billig said: "It's something that I think we should all be worried about - the deeply disturbing plethora of applications for so-called solar farms.
"I do not call them farms, because they are anything but that. What they are is taking up valuable agricultural land which should be used for food production."
Local councils will not be able to block the two Norfolk projects, because they are deemed Nationally Significant Infrastructure Projects, so will bypass the usual planning process with Ed Miliband, secretary of state for the Department of Energy Security and Net Zero, having the ultimate say.
She said this meant local people were being "denied" a say.
Mrs Mason Billig, whose administration wants to build the 3.9-mile Norwich Western Link roadover the Wensum Valley, said the farms would be eyesores, which would destroy wildlife habitats.
Mrs Mason Billig, who represents Loddon, said: "I applaud the efforts of parish councils to fight this creeping abuse of our landscape.
"I will certainly be supporting my parishes, many of whom will be affected, in resisting this latest attack on our county.
"Norfolk is not a place to be exploited by the government in its efforts to feed the power hungry southeast, especially when local people will not even benefit from it."
She likened the applications to controversial proposals for pylons stretching from near Norwich to Tilbury, where power from offshore Norfolk wind farms would be transferred to the southeast of the country.
And she said: "This is another example of how the government doesn't care about Norfolk.
"They will happily rape us of our commodities, but give us nothing in return. I, for one, am not going to stand for it and I hope the rest of the council will support me in this."
Earlier this month, Mr Miliband said solar power was "crucial" to hitting net zero targets.
He declared his intention to push ahead with onshore windfarms and solar farms where possible.
RWE, developing High Grove, has launched its initial consultation into its projects.
Mike Greslow, project manager for High Grove, said: "We understand the importance of community consultation, as only by working with local people can we ensure the best possible scheme is delivered."
Developers Island Green Power, behind plans for the East Pye Solar farm near the A140, say it will power hundreds of thousands of homes and play a key role in helping the UK hit ambitious net zero targets.
It said wildlife enhancement measures would be considered and said it would be looking for suggestions from the local community when it launches consultation later this year.
Parish councils in the area have already voiced their opposition to the huge scheme, which will stretch over a distance of more than 10 miles and cover around eight villages.
David Hook, chairman of Hempnall Parish Council, said: "The sheer size and transformative nature of this project would completely destroy the area."
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