Today, in Germany, one out of every two orders for rooftop solar panels is equipped with a wall monuted battery 10kwh home battery energy storage system. IKEA even provides solar modules, including energy storage. Although 120000 households and small businesses account for only a small part of Germany's 81 million population. However, according to relevant analysts, this growth shows the strong attraction of the future green vision for people: installing solar panels on each roof, installing electric vehicles in each garage, and installing batteries in each basement. The popularization of household energy storage batteries is an important step towards the future. In the future, low-carbon economy will increasingly rely on decentralized and volatile renewable energy supply.
In recent years, the German solar industry has been faltering, partly because of the low production cost of China's solar panels, and the gradual decline in grid electricity prices has also led to a sharp decline in the deployment of solar energy. Driven by the falling price of lithium-ion batteries, solar panels and powerwall 10kwh battery systems are becoming more and more popular, providing a lifeline for Germany's dying solar industry. Although battery energy storage has lagged far behind the development of solar energy so far, with the reduction of battery cost and the enhancement of performance, they will increasingly be used to store the unbalanced output of wind and solar energy, which provides flexibility for weather dependent energy.
renewable energy
In Germany, due to the emergence of household energy storage systems, many energy companies have stood up again. In Germany, solar panel arrays have been installed in more than 1 million buildings, but most of them have not installed energy storage equipment. Now more and more homeowners are buying batteries. German energy storage devices are also sold in France, Britain, Italy, the Netherlands, Spain, Australia and South Korea.
The price of the household energy storage system depends on the size of the house or enterprise, the energy demand of the owner, how much sunlight the building can accept, and the quality of the panel, battery and management system. It is worth mentioning that the economy of home solar battery storage is not the only motive or even the main motive of most battery system buyers. They want to be independent of power companies and rising electricity prices, and they want to contribute to green energy.
Evidence of energy storage can be seen everywhere: Royal Dutch Shell Petroleum Company acquired Sonnen, Germany's leading household battery manufacturer; German utility giant E ON cooperated with Solarwatt in 2016 to sell the combination of solar energy and batteries; The American Energy Storage Association predicts that from 2015 to 2020, China's energy storage capacity will grow 8 times, becoming a $2.5 billion market.
The energy storage market has broad prospects.
However, the disadvantages of battery energy storage are also obvious. It will take about 10 years to make up for the cost of batteries with the saved electricity bills. But at present, the life of most of these batteries is less than 10 years, at most only 15 years. The cost recovery period is relatively long, and the recovery period after 10 years is also short.
Experts differ greatly about the future of 51.2v 100ah household battery energy storage technology. Some people believe that in the foreseeable future, lithium ion batteries will still be the main battery type. Some people say that the next generation of small energy storage devices will be sodium ion batteries. Unlike lithium batteries, these batteries do not require cobalt, a precious metal. In addition, many enterprises are also developing environment-friendly batteries, such as Japan's seawater batteries, which do not contain carcinogenic heavy metals and rare minerals. No matter what type of battery, household energy storage can help eliminate the fluctuation of power generation, which is called "balance".
Experts said that balance is crucial to global low-carbon. But this "balance" will still happen to a large extent in the future. Some people put forward the idea that energy producers can provide a point-to-point electricity trading service, that is, households that can generate electricity can sell excess electricity beyond their energy needs to households that cannot generate electricity.
Some scholars said that the abolition of household and enterprise energy consumption tax in the future will be conducive to investment, and can provide a large number of household energy storage space like the promotion of solar energy, thus creating economies of scale and reducing prices.