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Electricity Savings - result doesn't match my calculations


elisa
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Hi, I have an issue with the result of the "Electricity Savings", it does not match my calculations. While browsing the forum, I found information that Electricity Savings are calculated as follows:

(From-Grid Tariff Energy Price) * (Inflation Rate for Energy Price) * (Degradation of Modules) * (Total Consumption covered by PV power)

And that's the way how I counted it. To simplify and verify the calculations, I assumed:
Inflation Rate for Energy Price = 0
Degradation of Modules = 0
Annual Average return on capital employed = 0
From-Grid Tariff Energy Price = 0.33 €
Total consumption covered by PV power = 2771 kwh / year

The program gives me the result:
Electricity savings = 910.69 €
My result is 2771 * 0.33 = 914.43 €

I cannot understand where this slight difference is coming from as the Export Tariff result is correct on the decimal point.

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Dear Elisa,

If you have standby consumption of the inverter then you first have to substract that from the consumption covered by PV.

So the calculation is:

Electricity savings = [Total Consumption covered by PV power - Standby Consumption (Inverter)] * From-Grid Tariff Energy Price

Best regards

Sixten

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