No worries, mate. To calculate the cost per kilowatt-hour in Euros, we first need to convert the $2.5 million to Euros and the 4MWh to kWh, using the current exchange rate of 1.18 USD to 1 EUR.

So, we'll start by converting $2.5 million to Euros by multiplying it by the exchange rate, which gives us €2.11 million.

Next, we'll convert the 4MWh to kWh by multiplying it by 1,000, which gives us 4,000 kWh.

Finally, we can divide the cost in Euros (€2.11 million) by the energy in kWh (4,000 kWh) to get the cost per kilowatt-hour in Euros. This gives us €527.50/kWh.

If you'd like to calculate this using Python, you can use the following script:

DO NOT FORGET TO ADD YOUR exchange_rate

```py
exchange_rate = 1.18
dollars = 2.5 * 10**6
euros = dollars / exchange_rate
mwh = 4
kwh = mwh * 1000
cost_per_kwh = euros / kwh


print("The cost per kilowatt-hour in Euros is: €{:.2f}/kWh".format(cost_per_kwh))
```
This script will output the cost per kilowatt-hour in Euros, which in this case is €527.50/kWh. I hope that helps, mate.
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