Trustpower says court appeals by an environmental lobby group opposing windfarms in the South Island cost ratepayers a lot of money and had to stop.
The Upland Landscape Protection Society is in liquidation, after the group had a High Court case against two windfarms struck out.
It was ordered to pay almost $50,000 to three councils and Trustpower and Meridian Energy.
Trustpower says the society continually turned up in court with no evidence, no witnesses and repeatedly had its arguments rejected.
The company says someone had to put a stop to it sooner or later.
It says the money is not significant to Trustpower, but councils deserve the right to recover the cost of the appeals on behalf of ratepayers.
However, the society says it has no regret for taking matters to the High Court.