Latest / RENEWA Sanierungsnavigator / Solarstromspeicher: Faustregeln zum Dimensionierung & Rendite
Transcript
- Oliver: you If you a photovoltaic system, you might ask the same question. Is it saving The short answer is yes, many cases much more than a few years But let's into the reasonings. The reason is simple. Power from the roof is extremely cheap. New photovoltaic systems generate power for about 10 to 13 cents per kilowatt hour. At time, you currently 33 to 35 cents per kilowatt hour So you your own solar power, you can really save And this where the battery storage comes play. Because during day the solar system more electricity than is currently needed Instead of this current for around 8 cents, it can stored and later used for example in the evening or at night. The difference then between the expensive power supply and the low power supply makes the memory economically interesting. Now you to roughly translate Experts estimate a well-designed memory of 225 full cycles per year. With a life span of around 15 years, a considerable amount of saved and reused solar power If you the saved power costs, you come to a potential savings of around 720 euros per kilowatt hour of memory capacity, even after typical memory losses have been considered. For comparison, Modern battery storage costs between 300 and 500 € per kWh. This means that systems are significantly below the limit of their economic value. This particularly exciting for owners of older photovoltaic systems. If the original feed-in fee has after 20 years, the power produced 3 to 4 cents per kWh. In these cases, a storage charge can particularly quickly. Generally important for the whole thing is of How many full cycles can you really reach? As I said, you can with 225 per year. And to make it work, need the right dimensioning. As a rule thumb, the storage capacity should be about the annual consumption in megawatt hours. So, if 6,000 kWh per year, you with the storage between 6 and 8 kWh. If you want an additional electric car or a heat pump, you can it little bigger, but in it's a sweet spot. If you want about you can to the podcast in Alexey calculated the whole Another factor are variable electricity rates. Here the storage can not only its own solar power, but also on cheap power supply when the stock prices are really low. This opens up additional savings potential and makes larger storage solutions even more interesting. So you can it. So while battery storage was still such an expensive extra a Today they part of the reasonable standard equipment. Especially if the food supply is really it is a no-brainer. This allows you the own consumption, lower electricity costs and yourself independent of the power market. Therefore, should the storage in the bill and at least have a bill issued where the storage is really taken account. And who wants to know will information in the show notes