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Training course on energy efficiency in SMEs - engine-sme.eu

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Step 3 – Annual operat<strong>in</strong>g costs<br />

of the light<strong>in</strong>g system<br />

Multiply<strong>in</strong>g the annual operat<strong>in</strong>g hours with the total<br />

power rat<strong>in</strong>g leads to the annual electricity c<strong>on</strong>sumpti<strong>on</strong>.<br />

Tak<strong>in</strong>g the electricity price from the <strong>in</strong>voice it is now easy<br />

to calculate the current costs for light<strong>in</strong>g.<br />

Example:<br />

2000 x 10.65 = 21300 kWh<br />

Electricity price = 0.10 Euro / kWh<br />

Total cost = 2130 Euro/year<br />

www.eng<strong>in</strong>e-<strong>sme</strong>.<strong>eu</strong>

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