134. Warmtebatterij vs thuisaccu: wat werkt écht na 2027?

• Download the tips & tricks on home batteries: https://www.energie-transitie.info/ti... • For more information about our home batteries: https://www.energie-transitie.info/th... In this video, I compare a thermal battery with a smart home battery system. How much energy can you really store with solar panels, and what happens after the abolition of net metering in 2027? Many people are talking about the so-called thermal battery or heat accumulator these days. Often, this involves heat storage in a boiler or heat storage using PCM technology. And honestly, I understand very well why. Net metering stops in 2027, and more and more people are worried about their energy bills. But does such a thermal battery really work as well as is often claimed? The idea is certainly attractive: you use excess solar energy to store hot water so that you have to feed less back into the grid. But many people nowadays compare a thermal battery with a smart home battery system. And actually, those are two completely different solutions. Let's start with the storage capacity. Suppose you have an average household with about 16 solar panels of 420 Wp. On a nice summer day, such a system can easily generate between 25 and 35 kilowatt-hours. But how much energy can you store in a storage tank? An average 200-liter storage tank can theoretically store about 14 kilowatt-hours of heat when you heat the water from 20 to 80 degrees. However, in practice, a storage tank is almost never completely cold. Often, the water is already around 40 or 50 degrees. As a result, there is often only about 6 to 8 kilowatt-hours of extra storage space left. While your solar panels might produce as much as 30 kilowatt-hours. So, even with a thermal battery, you often still have a substantial surplus of solar power left over. There is another factor to consider. In the summer, hot water usage is often lower and the heating is turned off. Consequently, the storage tank fills up quickly. As soon as that happens, the extra storage stops. In addition, there is heat loss. A boiler tank continuously loses heat to the environment. Depending on size and insulation, this can amount to several kilowatt-hours per day. With PCM storage, however, this is much less. And then there is the winter. Precisely when you need a lot of heat, solar panels often generate little energy. You only benefit from the lowest rates with a dynamic energy contract in that case. But then also take into account the energy loss of a boiler tank. But what is the difference compared to a smart home battery? A smart home battery can also charge cheap electricity and use it later when prices are higher. But the biggest difference lies elsewhere. A thermal battery has one task: storing heat. A smart energy system, on the other hand, looks at the complete energy consumption of your home. Suppose your solar panels generate much more energy on a sunny afternoon than you use. A smart system can then determine: do I use that energy to charge the battery, to fill the boiler tank, to charge the car, for immediate consumption, or are electricity prices even more favorable later today and should I only fill the battery then? So the system doesn't look at just one device, but at everything at once. And that will become increasingly important after 2027. Because then it will mainly be about using energy smartly for the right application at the right times. And that actually applies in the winter as well, when solar energy is limited but where dynamic tariffs play a bigger role. Don't get me wrong: a thermal battery can absolutely be useful. Especially when you use a lot of hot water. But it is important to understand that a thermal battery does not replace a complete energy system. In fact, hot water storage can actually be part of a smart energy system. Did you find this vlog interesting? Give a thumbs up, subscribe to our channel, and also take a look at our website for more smart energy solutions. See you next time.