Electricity savings

Electricity savings and the bill to be paid

One way to save electricity that we use in our daily routine is choosing a supplier. In order to know the various prices practiced in the market, we use the simulator from ERSE, the Regulatory Entity for Energy Services. With this simulator we can compare the invoice we pay with the various supply alternatives available on the market. How to save on energy in a rational way.

Reading Time: 5 minutes

Pre-populated electrical power conditions in the simulator

Fig 1 ERSE simulator for energy savings
Fig 1. ERSE simulator for energy savings

We start with the simplest hypothesis that the simulator offers, which is the pre-filled electricity bill with a monthly amount of €40 for a couple without children.

So let's do a quick simulation.

Fig 2 How to save energy with the help of the simulator
Fig 2. How to save energy with the help of the simulator

O ERSE simulator shows the result for an annual consumption of 1900 kWh, with a 3,45 kVA contract and with a bi-hourly option. Consumption is distributed between 1140 kWh off-load and 760 kWh off-load.

Fig 3 Electricity Savings, Simulation Result
Fig 3. Electricity Savings, Simulation Result

In this case, the simulator shows, among others, the following two hypotheses:

  • EDP ​​Comercial (DD + FE), annual value, € 411,28
  • Gold Energy, Monoelectric ACP 2022, €428,20

Between these two alternatives we have a price difference of €16,92 (4,1%).

It remains to check on the invoice what energy savings we can have.

Example with invoice for 3,45kVA power

Let's exemplify the supply of electricity by taking an invoice from which we remove the elements that we present.

A customized simulation, for a contracted power of 3,45KVA, simple hourly cycle (no cycle), processed every 2 months and electricity consumption was 2 kWh.

We can enter the invoice values ​​in the simulator to compare with the values ​​estimated by the simulator or if we prefer we answer that we do not have the invoice values ​​and the result that appears is the following

Fig 4 How to save electricity
Fig 4. How to save electricity

The simulator estimates that, with this data, the price of energy we pay per year is, using Galp, €99,06 or €16,51 in the 2-month period of the invoice.

In order to have more confidence in the assessment of energy savings, we can add together the invoices for a year and check the average, since consumption is often not actual, but estimated.

And so we can get an idea of ​​how to save on the electricity we consume.

Example with invoice for 4,6kVA power

From the example we removed the following elements, the contracted power of 4,6kVA, without an hourly cycle (simple).

The invoice we have is processed every 2 months and in the detail of this invoice we can see that the kWh price is €2 and the contracted power has a daily price of €0,151 (flat rate).

Consumption in 62 days was 118kWh.

We introduce the prices of contracted power and energy consumption in the simulator.

The simulator estimates that, with this data, the price of energy we pay per year is €299,07.

Fig 5 How to save energy by analyzing the market
Fig 5. How to save energy by analyzing the market

The simulator presents several alternatives that are more attractive in economic terms, the first of which is from Galp with an estimate of €220,46. An interesting energy saving potential.

The values ​​may not be exactly the same between the simulator that considers a period of 2 months and the invoice with a number of days that may not coincide.

Thus, the possibility of energy savings can be evaluated.

More options that the simulator lets you know

You can use the simulator to analyze other alternatives, such as the use of hourly options, whether simple, bi-hourly or three-hourly tariffs. In the case of the bi-hourly and three-hourly options, it is necessary to indicate the consumption in each of these time periods.

Other alternatives that can be tried are to reduce the contracted power and use options such as direct debit, electronic billing and various promotions.

It can also be used to assess the supply of natural gas.

For a chance to improve costs in a more environmentally friendly way, you can explore the Efficient Home Program which allows analyzing different alternatives for improving energy performance.

You can also improve the energy cost by replacing old technology lamps with new ones. LED, fluorescent or CFL lamps.

See also other features


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