How should we incorporate to our LCA model when there’s a Green certificate from a renewable resource?
Hello Marcel,
as you have the green certificate and you are using renewable electricity, you should be able to collect the data on the resources used for producing electricity.
By using this information, you can model the A3 electricity by the different shares of renewable energy resources as seen below.
You can find more information about this in this article.
Please remember that you also should attach the certificate to the EPD verification process.
Thanks Mikhaela,
Let me know if this is corrrect, for example, the certificate is from wind energy (xxx,xxx.xx kWh). So in the quantity in the “Electrity production, wind 1-2mw” I will used xxx,xxx.xx kWh / no. of product produced, right?
Hi,
Yes, if the energy consumption is the annual one for the whole factory, you would allocate this based on the total production volume in your factory.
Thanks Mikhaela,
But should I subtract the kWh of that certificate from the annual electricity consumed for the whole factory? Example, if the factory consumed 100,000 kWh in that year for producing 250,000 kg product, and also in that same year the company bought 26,000 kWh green certificate from wind energy. Does it looks like this:
(100,000 kWh - 26,000 kWh)/250,000 kg = 0.296 kWh/kg product
Is this right, or I am totally misunderstood this. :-).
Hi again,
If your total annual energy consumption is 100,000 kWh then it is correct that 0.296 kWh/kg product will be allocated to the grid mix.
Please remember to also allocate the renewable energy, in this case 100,000 kWh/250,000 kg product = 0.104 kWh/kg product.
In your manufacturing energy, you will thus have two energy inputs (or more); one for the grid mix and one or more (depending on how many different renewable energy sources you have) for the renewable energy.