This data come from energy company SSE, who run more than 50 hydroelectric schemes across the Highlands, Perth, Kinross, Argyll and Bute.
The high rainfall over winter and the rapid thaw of snow were perfect for hydroelectric production. The previous record for hydroelectric production over a year was 3,890 gigawatt hours (GWh) but the figures for 2011/12 look set to pass the 4,000 GWh mark.
The winter was especially warm; temperatures in Aberdeen airport went as high as 17.2C last Tuesday.
Paul Smith, SSE managing director for generation said that the weather conditions “ensured the continuing success of hydro power as a valued source of renewable energy.”