Vector is to start trialling rooftop wind turbines imported from Scotland. The Swift turbines, manufactured by Renewable Devices in Edinburgh, are rated at 1.5kW and quiet enough for urban use. The first trial site is the Waitakere City Council building (Waitakere has a commitment to reduce greenhouse gas emissions by 85% by 2050). In NZ conditions, it’s expected that the Swifts will deliver between 2,000 and 3,000 kWh per year – around a quarter of the average household’s electricity usage. I wonder how the Swifts might cope with a North Canterbury nor’wester?