In view of rising energy prices, energy efficiency is becoming more important than ever because every kilowatt saved translates into cost savings. By installing our ActiveEnergy solution in a building we can guarantee energy and cost savings. The savings are communicated clearly and transparently through our customer dashboard. In this blog we explain how we achieve energy bill savings through voltage optimization.

Saving energy through voltage optimization

We achieve energy savings of 9-13 % through voltage optimization – the process of reducing the voltage level in buildings. To find out how exactly voltage optimization works and what other advantages come with it, read our latest blog on how supermarkets and hotels can reduce their electricity bills through voltage optimization.

How we guarantee energy bill savings

To make sure we can deliver on our promise and achieve actual savings, we first test our ActiveEnergy solution on site before installing our AE PowerStation long-term. Our customers don’t pay for the testing. We don’t charge any service costs until actual savings are being achieved. In this way, we guarantee that every building where our ActiveEnergy solution is installed will profit from the installation. We continuously measure and communicate how much energy and costs are saved through the installation of our AE PowerStation.

How we make the achieved savings visible

To measure how much energy is saved by our AE PowerStation, we perform an A/B test to prove the effectiveness of our solution. We compare the electricity consumption without voltage optimization (A-value) with the electricity consumption with voltage optimization (B-value). The difference between these two values corresponds to the savings achieved.

To make sure that we take the two values under the same conditions, the measurements must take place at times that usually have a similar or the same energy consumption. To find those, we analyze the energy consumption of the building over time, based on machine learning.

To measure the A-value, the AE PowerStation is switched into bypass mode meaning that it’s disconnected for 10 minutes. Afterwards it’s switched on again to measure the B-value. The process is repeated between 15-20 times a month using different intervals of duration (from 1 to 20 minutes).

How the results of voltage optimization translate into monetary savings

Your energy bills always depend on how much electricity you use. You pay for the kilowatt hours you consume meaning a reduction in consumption reduces your costs. To make your savings visible, transparency is key. If we can’t show that savings are achieved through voltage optimization you wouldn’t know whether reduced costs are just a result of lower energy consumption or indeed a consequence of installing ActiveEnergy. That’s why we constantly monitor your building’s energy consumption and savings. The results are available via our customer dashboard.

A practical example: Saving energy and costs as a supermarket

To illustrate how the process of saving energy and costs through voltage optimization looks in practice, let’s look at an example: Thomas is a supermarket manager facing increasing electricity prices. He is looking for a solution to save energy and costs.

Once Thomas has approached us, we determine the savings potential of his supermarket by installing our temporary measuring kit, the AE MobileHub. We track the energy consumption, voltage levels, and other parameters of the supermarket for around three weeks.

Our AE Mobile Hub allows us to predict beforehand, how much energy savings can be expected after the installation of AE PowerStation. This result is then presented to Thomas in the form of a report, to make sure that we are only installing an AE PowerStation if it can achieve significant enough savings and is beneficial for Thomas’ supermarket.

As the next step, we install the AE PowerStation, and start performing A/B Tests.

Voltage optimization results in energy and monetary savings

Example of an A/B test result:

  • Energy consumption without voltage optimization (A value): 100 kW
  • Energy consumption with voltage optimization (B value): 91 kW
  • Achieved saving: 100 kW – 91 kW = 9 kW

Thomas manages a large supermarket with an average energy consumption of 510 000 kWh. Assuming the 9 kW of the A/B Test example is achieved on average, this corresponds to a saving of 9 %. Based on his average energy consumption, his energy savings would be as follows:

Thomas’ energy savings:

  • Average electricity consumption per year without voltage optimization: 510,000 kWh
  • Average electricity consumption per year with voltage optimization: 464,100 kWh
  • Average energy savings achieved: 45,900 kWh

Calculating with an average industry energy price of 0,20 € per kWh (source: BDEW – Electricity price analysis April 2022), Thomas could achieve the following monetary savings:

Thomas’ cost savings:

  • Average energy cost per year without voltage optimization: 510,000 kWh x 0,20 € = 102,000 €
  • Average energy cost per year with voltage optimization: 464,100 kWh x 0,20 € = 92,820 €
  • Average energy cost savings achieved: 45,900 kWh x 0,20 € = 9180 €

Our service fee is based on the savings achieved. In other words: Thomas can only win from installing our solution. We can guarantee him that ActiveEnergy will save him not only a considerable amount of energy, but also cost.

Do you want to achieve energy bill savings yourself? Email us and we will identify your individual savings potential.

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