References

1. Graig Fatha member savings

   Members of Ripple's first project had on average £232 credit applied to their electricity bills Apr-Dec 2022. Their estimated savings for their second year from March 2023 is £977.

2. You could see your bills reduced by up to 25%

   The average volume weighted wholesale electricity price, using BEIS's Energy and Emissions Predictions 2022 (2021-40) is about 8p/kWh. Solar park and wind farms' typical operating costs are 2p/kWh. 8p/kWh - 2p/kWh = an average saving of about 6p/kWhp/kWh generated. The average residential retail electricity price, based on BEIS's projections (2021-2040) is about 20p/kWh. 6p/kWh is 30% of 20p/kWh (we have used a conservative 25% to be on the safe side).

3. Ripple is up to 65% cheaper than installing rooftop solar

   Based on costs set out in the Energy Savings Trust’s Rooftop Solar Calculator. The cost of installing a 3.5kWp solar PV system on the roof of a south west facing house in London is £4,788. This would generate 3,069kWh per year. The cost of purchasing 957 watts of a wind farm with Ripple, which would generate 3,069kWh per year is £1,689. This is 65% cheaper than the solar installation costs.

   Using Eon's home solar packages from February 2023 and assuming 11% load factor, the lowest starting cost of installing a 2.37kW solar system is £5,995. This generates 2284kWh annually. To reach a typical UK household's generation of 2,900kWh, the cost would be £7,613. Ripple's cost for the same generation amount 2,900kWh is approximately £2,651, making Ripple 65% cheaper than rooftop solar.

4. How much could you save?

   Household size:

   Consumption estimates based on Ofgem's revised Profile Class 1 electricity TDCVs.
   Super consumption estimate based on electricity required by a Nissan Leaf electric car (efficiency of 264Wh/mile) travelling 8,000 miles a year added to the high usage figure. 264Wh/mile x 8,000miles = 2,112kWh. 4,300kWh + 2,112kWh = 6,412kWh.

   Typical savings per year:

   The average volume weighted wholesale electricity price, using BEIS's Energy and Emissions Predictions 2022 (2021-40) is about 8p/kWh. Solar park and wind farms' typical operating costs are 2p/kWh. 8p/kWh - 2p/kWh = an average saving of about 6p/kWhp/kWh generated. The average residential retail electricity price, based on BEIS's projections (2021-2040) is about 20p/kWh. 6p/kWh is 30% of 20p/kWh (we have used a conservative 25% to be on the safe side).

   CO₂ Savings:

   Assuming 488gCO₂ saved per kWh, based on the UK Governments conversion factors for company reporting of greenhouse gas emissions.

   Trees:

   The Woodland Carbon Code suggests an average of 350,000kgCO₂ is sequestered per hectare of forest over 50 years, so 7,000kg per year. Forestry Research recommends planting 2,500 trees per hectare. For each tree planted 7,000/2,500 = 2.8kgCO₂ captured each year. 19,000,000 / 2.8 = 6,785,000 trees.

5. 5 panels to generate its annual electricity needs

   We anticipate using 74,334 panels across the site to generate 41,172 MWh, therefore each panel will generate about 0.55MWh. 2.9MWh divided by 0.55 is 5.2 panels.

6. That's the same as taking 11,250 cars off the road

   Based on an average mileage of 7,400 miles per year and average CO₂ emissions per gallon of 10.9kg for a small car with 52mpg. (10.9kgCO₂pg / 52mpg) x 7,400miles/yr = 1,551kgCO₂. 19,000,000kgCO₂ / 1,551kgCO₂ = 12,250 small cars, according to carbon independent.org.

7. That's the same as 17,800 people going vegan

   Based on a carbon saving of 1,069kg per person going vegan. 19,000,000kg / 1,069kg = 17,800 people. Scarborough et al 2014.

8. That’s the same as the weight of 209,000 baby elephants

   According to National Geographic the average weight of a baby African elephant is 91kg. 19,000,000kg / 91kg = 209,000 elephants.

9. A typical employee could save around 1,400kgCO₂ per year

   For a 2,900kWh share of the project with 488gCO₂ saved per kWh, based on UK Government Greenhouse Gas Emissions provisional figures and the UK Government Greenhouse Gas Emissions provisional figures. 2,900kWh x 488gCO₂/kWh = 1,415kgCO₂.

10. 73% of workers want improved sustainability policies

    According to a survey of 1,000 office workers commissioned by TopLine Film.

11. Generation to power the average UK home for one year

    Derril Water

    It will take on average 37 minutes for the solar park to generate enough electricity to power the average UK home for one year. At maximum power Derril Water generates 41,172MWh a year. There are 8,766 hours in a year and 2.9MWh demand so it will generate 4.7MWh an hour on average. 2.9 divided by average of 4.7MWh is 0.61 of an hour, which is 37 mins.

    Kirk Hill

    In less than 10 minutes, Kirk Hill wind farm will generate enough electricity to power the average UK home in one year. At maximum power Kirk Hill wind farm generates 18.8MWh in an hour, or 313kWh per minute. Typical UK household uses 2,900kWh per year. 2,900kWh / 313kWh per minute = 9.26 minutes.
    Ofgem’s Typical Domestic Consumption Values for Gas and Electricity

12. Over the last year 26% of the UK’s electricity has come from wind

    According to data from Drax Electric Insights.

13. By 2030, 64% of the UK’s electricity could come from wind

    According to BloombergNEF’s New Energy Outlook 2019.

14. Over 11,500 wind turbines in the UK

    According to RenewableUK’s Wind Energy Statistics.

15. Electricity generation from wind power in the UK has increased by 715% from 2009 to 2020

    Based on analysis by the IPCC finding onshore wind to be the lowest CO₂ source of power and BEIS’s Electricity Generation Costs 2020 report.

16. 84% of people in the UK support onshore wind

    According to the BEIS’s Public Attitudes Tracker: Autumn 2021.

17. The greenest and cheapest electricity in the UK

    Based on analysis by the IPCC, finding onshore wind to be the lowest CO₂ source of power and BEIS’s Electricity Generation Costs 2020 report.

18. Enjoy low, stable priced onshore wind power

    For projects commissioning in 2025 according to BEIS’s Electricity GenerationCosts 2020 report.

19. Onshore wind is the lowest CO₂ source of power

    According to analysis by the IPCC.

20. Tonnes of CO₂ emissions saved per year

    Derril Water

    Assuming 488gCO₂ saved per kWh, is the carbon intensity of fossil fuelled electricity generation in the UK, see UK Government Greenhouse Gas Emissions provisional figures. This factor is used as solar generation displaces fossil fuelled generation. A reduction has been applied to account for panel degradation.

    Kirk Hill

    Assuming 527kgCO₂ saved per MWh, based on the UK Government Greenhouse Gas Emissions provisional figures.

    Kirk Hill's estimated yearly output is 60,300MWh. 527kgCO₂/MWh x 60,266MWh = 31,760,182kgCO₂ = 31,760 tonnes of CO₂.

21. One swoosh of the turbine's blades could power your home for 8 hours

    At rated speed and assumes a typical household demand of 2,900kWh per annum Ofgem’s revised Profile Class 1 electricity TDCVs.

22. 100% renewable electricity

    Electricity backed by 100% renewable sources, E.ON’s renewable generation assets, agreements with UK generators and the purchase of renewable electricity certificates. The electricity supplied to your home or business comes from the National Grid and DNOs.

23. Average savings for Graig Fatha members

    First-year generation from March 2022 to February 2023 with a savings rate of 9.6p/kWh and the second-year generation from March 2023 to March 2024 with a savings rate of 27p/kWh.

24. EV drivers costs and savings

    The costs and savings are based on a Tesla Model Y as UK's best-selling cars of 2022. According to the ev-database.org the energy consumption of a Tesla Y is 164Wh/km which is 264Wh/mile (164 * 1.609 = 264). 264 / 1000 = 0.264kWh/mile. The average car mileage according to the Department for Transport for the UK is currently 6,800 miles per year. 6,800 * 0.264 = 1,795kWh annual consumption.