“ASTONISHING” MONTH FOR WIND POWER OUTPUT IN SCOTLAND – NEW DATA PUBLISHED
+ Wind power output jumps 36% compared to the same period last year
+ For the first time on record, during two days in a single month wind generated the equivalent of all Scotland’s electricity needs for the day
+ Politicians urged to expand Scotland’s “renewables revolution” to heat and transport sectors
Politicians should build on Scotland’s success of generating renewable electricity and expand it to other sectors such as heat and transport, said environmentalists today (Wednesday 5 October).
The call by WWF Scotland came as the group published analysis of wind power and solar data provided by WeatherEnergy which found that for the month of September:
- Wind turbines in Scotland provided 766,116MWh of electricity to the National Grid, enough to supply, on average, the electrical needs of 87% of Scottish households (2.1 million homes) – this represents an increase of 36% compared to that of September 2015, when wind energy provided 563,834MWh.
- Scotland’s total electricity consumption (i.e. including homes, business and industry) for September was 1,751,798MWh. Wind power therefore generated the equivalent of 44% of Scotland’s entire electricity needs for the month
- On two separate days (Saturday 24 September and Thursday 29 September) wind turbines generated output equivalent to more than Scotland’s total power needs for each entire day – equivalent to 127% and 107% of each day’s total electricity demand, respectively. And, the first time since WeatherEnergy began monitoring the data that this has happened more than once in the same month. 
- For homes fitted with solar PV panels, there was enough sunshine to generate an estimated 70% of the electricity needs of an average household in Aberdeen, 69% in Dundee, 61% in Edinburgh, 60% in Inverness, and 50% in Glasgow.
- For those homes fitted with solar hot water panels, there was enough sunshine to generate an estimated 76% of an average household’s hot water needs in Dundee, 75% in Aberdeen, 59% in Edinburgh, 58% in Inverness, and 42% in Glasgow.
WWF Scotland’s director Lang Banks said:
“September was an astonishing month for wind power, with output up more than a third compared to the same period last year. Even more amazing was that on two separate days wind turbines alone provided output equivalent to more that Scotland’s total electricity needs on each day – the first time we’ve witnessed this twice in a single month.
“That Scotland has made such great strides in generating renewable power and addressing climate change is the result of many years of political and public support. However, if we are to continue to play a leading role globally in cutting carbon emissions, we need politicians to build on our renewable electricity revolution and expand it to other sectors such as heat and transport.”
Karen Robinson of WeatherEnergy said:
“It was only back in August that we recorded the first ever day, since we began monitoring the data, where wind turbines alone generated more electricity that was needed on the day. It’s therefore wonderful to see the same repeated in September, but this time on two separate days.
“Electricity demand on the two particular days in question was lower than the average. Nevertheless, the fact wind was able to generate the equivalent of all Scotland’s electricity needs is something worth celebrating. With continued expansion of wind power capacity I hope we can look forward to many more days where wind meets all of Scotland’s power needs.”
On solar output, Robinson added:
“It’s not just wind power that Scotland can choose to embrace. Autumn may have begun, but for those homes fitted with solar panels there was still plenty of solar output to generate a significant proportion of an average household’s electricity or hot water needs.”
Notes to Editors:
 Part of a joint project to help the public better understand the nation’s renewable energy resource, the data is provided by WeatherEnergy, and is part of the European EnergizAIR project, supported by the Intelligent Energy Europe Programme, led by the European Agency for Competiveness and Innovation (EACI). The project currently has partners in ten European countries. Severn Wye Energy Agency is the UK partner.
Wind data for September 2016
Equivalent number of households potentially provided
% of households
2.1 million homes
87% (of Scottish households)
- On Saturday 24 September, wind output was 51,758MWh. Demand that day was 40,686.5MWh – thus wind generation was equivalent to 127% of total demand that day.
- On Thursday 29 September, wind output was 51,695MWh. Demand that day was 48,410.5MWh – thus wind generation was equivalent to 107% of total demand that day.
Solar PV data for September
Production in kWh
% of an average household electricity demand provided
Solar thermal data for September
% of an average household hot water provided by solar thermal
In generating the monthly report, the following assumptions are made:
Average annual Scottish household electricity consumption - 4,435 kWh (this figure is greater than the UK average)
Number of households in Scotland - 2.42 million.
Total annual electricity consumption in Scotland is 25,873GWh, of which 41% is domestic and 59% is non-domestic.
Average solar PV installation - 3kW
Average hot water (thermal) installation - 4.62m2
Average household daily hot water consumption - 122 litres
For wind power, live wind energy output data is aggregated from nearly 8 GW of currently running wind farms in the UK, together with data from UKWED which shows the capacity of wind energy installed in each UK region. Government data is used to provide the capacity factor of wind energy in each region. All of this data is combined by WeatherEnergy’s EnergizAIR computer model to produce a realistic estimate of how much energy has been generated by the wind turbines in each region, it then converts this into how many homes could have been provided by energy from wind power.
Further technical information can be found here:
 The first time was on Sunday 7 August 2016.
Scotland just produced enough wind energy to power it for an entire day, The Independent 11 August 2016.
WeatherEnergy has been monitoring wind output data since 2014.