The price of electricity continues to rise, in an unstoppable rise so far despite variations in the electricity bill, and without apparent limit in the short to medium term which makes consumers rethink aspects up to present little valued by many when purchasing state-of-the-art electronic equipment.

I’m referring to energy efficiency, data that can be found in the renewed efficiency labels that each piece of equipment must display, and that gives us an idea of the average cost of electricity that a device will cause us in the environment. time due to its use.

Although when evaluating the technical aspects of a TV this was not a point that worried me too much until recently, as it is not one of the most expensive devices, the truth is that such which is put the cost of each watt and given the use The intensive work that we do with the small screen at home is an increasingly important factor to take into account.

Because of this, something that seemed unthinkable a few years ago is gaining momentum in recent months: swapping out an old inefficient TV for a much more efficient modern one can pay off in a matter of years.

This is the case depending on the type of television you have, the one you want to buy and especially the use you usually give to your equipment, since it is not the same which only turns it on for one or two hours. per day and on certain weekends which use it intensively on a daily basis by several members of the family.

## Extreme case: replace my old plasma television

As an example, I will give you my case. At home we have several televisions and one of the most used on a daily basis is a plasma model already veteran of more than 10 years (one of those known for a good image quality but also serving as a radiator for the living room) which has a high maximum power consumption of around 265 watts with all the brightness fully up. To this must be added that it does not have an integrated TNT decoder and therefore needs an external decoder which consumes an additional 15-20 watts. We will consider an average of 250 watts to simplify the calculations.

This particular TV runs an average of 10 hours a day during the day starting at 12:00 p.m., so its usage typically covers the range of fixed and peak rates, except on weekends, when it turns on in off-peak hours but for 3 or 4 hours. more hours.

To start calculating, the first thing we need to do is find out the cost for each KWh of electricity we are going to consume, a figure that varies every hour of the day and will depend on each power company, but what we can do on average today, at the time of this writing, with the following values according to what is marked on the website of the Spanish power grid in the three fixed sections: “punta, llano y valle”:

Cost in off-peak hours: 0.15 € / kWh Cost in fixed hours: 0.19 € / kWh Cost in peak hours: 0.28 € / kWh

The peak period is when the cost of tolls and charges will be the highest, it lasts 8 hours and is between 10 a.m. and 2 p.m. and 6 p.m. and 10 p.m. The flat section lasts an additional 8 hours, has an intermediate cost and lasts between 8 and 10 hours, 14 and 18 hours and between 22 and 24 hours. Finally, we will have the valley tariff, another 8 hours which is the cheapest period and includes between midnight and 8 am as well as during all the hours on weekends and on public holidays.

To see how we might amortize a new TV, we’re going to consider a mid-range LCD-LED model of around $ 600-700 and an equivalent size or something bigger than what we already have, which is about 40-43 inch. If we look between interesting modern models and look at the specifications of different manufacturers, we can see that in general the maximum power consumption does not exceed 130-150 watts, data that depends on the intensity of the LED light, OLED and why is it adjusted. course what kind of content we put, whether it is SDR, HDR, movies, cinema, cartoons, etc.

But to simplify the calculations we will consider this value of 150 watts per hour compared to the 250 watts of the old television, which represents a difference of 100 watts per hour of use. In my particular case, we’re assuming it will be on for about 10 hours a day, half in the “package” price range and half in “peak” hours to facilitate calculations.

This gives us a price of (0.095 + 0.14) = 0.235 euros per day of difference between the two televisions, which represents around 7 euros per month and if we extrapolate to a whole year we arrive at around 84 euros. If we divide the 600 euros between this amount, that gives us an amortization period of about 7.14 years with what we saved on the electricity bill.

## Trade in your old LCD TV for a modern OLED

Another example that we can consider is changing an LCD TV that is a few years old for a new one with OLED panel technology, based on self-emitting pixels and in general much more efficient than the LCD, especially if it has more from 7-10 years and this is before the introduction of LEDs as a backlighting system.

In older LCD TVs, we have consumptions that easily exceed 200-250 watts on average in sizes of around 50-55 inches. But without going too far back in time, with a modern mid-range LCD-LED television (2019) of the most popular like the Sony XG95 we have a standard / maximum consumption of 145/256 watts in 55 inches, a figure which rises. at 176/313 watts in 65 inches, 230/371 watts in 75 inches and that reaches 282/438 watts in the 85 inch model.

If we opt for OLED technology, consumption drops considerably compared to the LCD. For example, with a model from the same manufacturer, the Sony AG9, we have values of 132/394 watts in 55 inches and 169/490 watts in 65 inches. We can also opt for a more efficient model in the OLED range such as the LG G16LA with the latest generation EVO panel which offers us a consumption of 107/165 watts in the 55-inch version or 128/226 watts in the 65-inch version.

Let’s do some numbers. For example, we will consider an old 55 inch LCD TV with an average consumption of around 250 watts and replace it with a much better performing OLED, like the LG G16LA also in 55 inch with an average consumption of 135 watts. In this case, the difference in power consumption will be 115 watts per hour. If we assume 10 hours of use per day, half in the “flat” price range and half in “peak” hours to do the simpler calculations, we will have about 575 watts in each range.

This means (0.11 + 0.16) = 0.27 euros per day difference between the two televisions, which gives us around 8.13 euros per month and if we extrapolate to a whole year we arrive at around 97, 56 euros. If we divide the price of the OLED TV which can currently be bought for around 2,000 euros between that amount, that gives us a payback period of around 20 years, clearly excessive if what we are looking for is a return on investment. given the high price of OLED models currently compared to mid-range LCDs.

However, one can, for example, draw an interesting conclusion such as the savings that can be obtained in different time periods if one changes phones. Thus, in the event that the new screen is thought to last 5 years, the savings compared to an old model can be around 487 euros. If we consider about 7 years of use the figure is 682 euros and if we hope that it lasts 10 years, the saving will have been 975 euros.

Savings at 5 years: 487 euros Savings at 6 years: 585 euros Savings at 7 years: 682 euros Savings at 8 years: 780 euros Savings at 9 years: 878 euros Savings at 10 years: 975 euros

As can be seen, the calculations are done a bit roughly and logically depend on whether the price of electricity has remained constant during these years, from the television that we have, if we only have one or more than we want to replace in different parts, which we want to buy and the particular use in hours and type of content (HDR, SDR, etc.) that we give to each, but they reflect a trend that can be extrapolated to the rest of the home appliances and that highlights something that many users have come up with until a few years ago.

The power consumption of our new devices is a key and increasingly fundamental factor that we must assess as carefully as the rest of the specifications and features if we do not want their future use to cost us a small fortune.