In times of rising energy prices, it is increasingly important for companies in all industries to become more energy efficient and save costs wherever possible. Supermarkets and hotels, for example, have high energy consumption throughout the year as they require constant lighting, cooling and ventilation. How can they realize significant savings?

What if there was a solution that supermarkets and hotels could use to reduce their electricity costs without having to make any concessions? The key to success lies in voltage optimization, which can reduce a building’s energy consumption and CO2 emissions by 5-13 percent. As a positive side effect, voltage optimization also improves the performance of devices.

In this blog, we explain how voltage optimization works and how hotel and supermarket managers can actively benefit from this solution.

What is voltage optimization?

Voltage optimization is the process of reducing the voltage level in buildings. According to the international standard IEC 60038, power suppliers and grid operators must supply a voltage of 230 V ± 10%. Every electrical device must be able to function safely and reliably within this voltage range. The CE certification on electronic devices certifies that this is the case. This means that a voltage of only 207 V is sufficient to ensure complete functionality of all devices.

Advantages of voltage optimization for supermarkets and hotels

For hotels and supermarkets, voltage optimization means a reduction of their electricity costs and CO2 emissions, as well as an extended lifespan of devices.

1. Reduction of electricity consumption and costs

The electricity consumption of a building can be calculated using the following formula:

Electricity consumption (kWh) = voltage x current x time

Accordingly, lowering the voltage greatly reduces electricity consumption. This can yield significant cost savings, especially in times of high electricity prices.

2. Reduction of CO2 emissions

Lower power consumption equals lower energy use as the emissions that would have been generated during the energy production can now be saved. Energy-related emissions contribute significantly to global greenhouse gas emissions. In Germany, for example, they accounted for around 85 % of greenhouse gas emissions in 2021.

Increasing energy efficiency in buildings and the associated reduction in CO2 emissions helps companies:

  • Achieve corporate, national and international climate targets
  • Meet your customers’ demands for greater sustainability
  • Comply with political requirements

3. Prolonging the lifespan of devices

Does lowering the voltage have a negative impact on your devices? No, the opposite is the case. The minimum level of voltage is sufficient to ensure full functionality. It even increases the lifespan of devices.

Let’s look at the example of lighting: Reducing the voltage does not affect the luminosity, but it does lower the temperature in cables and devices. The lower temperature has a significant effect on the lifespan of devices, as illustrated by the 10-Kelvin rule:

Every reduction in temperature by 10 Kelvin doubles the lifespan of electronic components and devices.

A study by OSRAM provides impressive proof of this: their research showed that the lifespan of LEDs doubled when reducing the voltage by 20 V to 210 V instead of the usual 230 V.

Vegetables displayed for sale in supermarket

How can your supermarket or hotel profit from voltage optimization?

EnergyLabs lowers the electricity consumption of buildings by 5-13 percent, actively reducing electricity costs and CO2 emissions. An additional positive side effect is lower maintenance costs as the reduced wear on the devices results in an extended lifespan.

Find out what savings potential your supermarket or hotel has. Email us and we will identify your individual savings potential.

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Photos: EnergyLabs