The calculations displayed in your portfolio are estimates. The technology does not yet exist to allow us to report your impact in real-time eg. the actual CO2 savings from domestic installations.
However, we have put careful thought into providing estimates that are as meaningful as possible.
For each individual investment product:
Kilos of CO2 emissions prevented from entering the atmosphere to date
This figure is calculated by taking:
- the kilos of CO2 saved per day per installation (which is provided to us by the business as an annual figure, and then divided by 365). This is then multiplied by:
- the number of days since all installations were completed (typically six months from the investment product issue date). This is then multiplied by:
- the number of systems that your investment has funded (rounded up to the nearest whole number)
Your figures are updated daily, and can also been at the top of every page on the site when logged in.
People having improved opportunities and livelihoods
Where the investment product is delivering individual energy systems for homes, we presume an average of 5 people per household, using data taken from GOGLA: see https://solar-aid.org/our-calculations-explained/. "The standardised GOGLA metrics calculate a cross continent average household size of 5 people".
Therefore this figure is calculated by multiplying the number of systems that your investment has funded (rounded up to the nearest whole number) by an average 5 people per household.
Extra hours of high quality light
This is calculated using a standard estimate of 1006 hours of extra light per system per annum, based on data from https://solar-aid.org/our-calculations-explained/.
As with CO2 emissions, extra hours of light delivered by your personal investment is updated daily and displayed at the top of every page of the site when logged in.
For your portfolio as a whole:
The measures described above all appear on your Portfolio summary page, aggregating your total impact.