Development of household energy storage inverter in Europe
People’s willingness to buy energy storage is greatly enhanced under the energy shortage. The largest market in Europe is Germany, which has formed a GWh-level market with a high market concentration. Germany, Italy, Switzerland, the United Kingdom, Austria and other countries occupy more than 95% of the market.
At present, when distributors (installers) master the channels, products with separate cell and energy storage inverter are more popular, especially in areas outside Germany, mainly because of easy installation and easy expansion, and easy to reduce procurement costs. The trend in Germany, the United States, and Japan is all-in-one.
Recent changes in the residential energy storage market
First, the battery capacity of each system is increased;Second, energy storage inverter power is also increasing, from 3kW and 5kW to three-phase 10kW in Germany; third, components are over-matched. Previously, components: inverters: batteries were mostly 1:1:2, and now they tend to be larger. The capacity of the components, as long as the roof can be installed, is also one of the reasons for the increase in the power of the energy storage inverter.
Therefore, the demand for all three links is increasing.
Which part is more in short supply
PV inverter and batteries are relatively in short supply. Inverters are mainly subject to IGBT chips, and batteries are mainly subject to upstream raw materials. At present, the battery and energy storage inverter companies in the head have a lot of pressure on the delivery side, so they are accelerating production expansion.
There are two kinds of lines, one is an all-in-one machine that is battery-inverter integration, and the other is to buy battery modules separately. Compared with the two routes, the split type sells the best, especially in the non-German-speaking market, where one energy storage The cell pack can be adapted to various inverters at the same time. Because each energy storage inverter manufacturer has its own sphere of influence.
The maiden voyage is in the Eastern European market; Growatt is relatively strong in the Southern European market, with high cost performance. At present, dealers do not like the all-in-one model. For example, Italian dealers prefer the easy-to-expandable installation method of P Company’s small modules. At the same time, they can be adapted to various inverters, and dealers will also generate a certain degree of customer stickiness. The expansion of the one-piece machine is more troublesome.
Therefore, the Western European region prefers the separate form of battery and energy storage inverter, and the German market is more inclusive. Installers such as Krannich provide both all-in-one and separate products, but the split model is more popular in Europe. For energy storage battery, we have listed Top 10 energy storage battery companies in China.
Characteristics of household energy storage development in european countries
Southern Europe has better light conditions, and the battery capacity will be larger. Spain has about 10 kWh of electricity for each household because there is no subsidy; Italy has a larger capacity, and many customers choose to allocate 20 kWh of electricity; the UK does not have any energy storage subsidies, and the house is smaller , The electricity load is also small, it may be equipped with a 3kW energy storage inverter and a 5 kWh battery. In northern Europe such as Norway, Finland, etc., the battery capacity is smaller during the light period, and it is designed to be fully charged in one hour.
In Germany, the per capita income of Germany is high, and it is more recognized for expensive brands, with a premium of 20-30%. In Germany, each household is currently 8 kWh to 14 kWh, and the energy storage inverter is about 5kW, which is still increasing rapidly. The main reason is that the price of electricity in Germany is too high. Install as many components, inverters, and batteries as possible, so that all of them can be used for their own use, and can even be powered independently from the grid.
In Eastern Europe, such as Poland, there is a combination of 10kW energy storage inverter and 60kWh battery. Such a large capacity is mainly in line with the local subsidy policy of 60kWh, which can get the most subsidies. As long as there is enough space in the home to arrange components and batteries.
Therefore, in the case of larger capacity, modular split products are more popular, such as the Italian and Spanish markets, etc.
The composition and capacity ratio of a typical optical storage system
There are mainly three categories: components, energy storage inverters, and batteries. Components: The inverter is about 1:1.05~1.1, that is, a 5kW component may be equipped with a 5-6kW energy storage inverter. The battery comes with 2 hours, mainly due to less light on average in Europe.
The average light utilization hours are only two or three hours, and the battery can be fully charged with a 2-hour battery, which is beneficial to the life. In terms of components, the roof tends to be equipped with larger components as much as possible to increase the power generation, and the power of the energy storage inverter is also larger than that of the components.
The battery configuration varies from company to company. For example, the battery of company B is mainly 16 strings of 10.24 degrees, and the battery of company P may be 4 strings of 2.4 degrees of electricity to form a battery of 9.6 degrees of electricity. Company B is a module of 5.12 kWh. In actual use, it only needs to be simply superimposed, which is more flexible.
The battery only needs to meet the power used at night. It does not need to be very large, but it is also increasing. In addition to the increase in component capacity and subsidies, it is also related to the increase in the popularity of electric vehicles. The need for battery expansion. The installed capacity of some households in Germany is already close to 50 kWh, which is related to the fact that there are 1-2 electric vehicles at home
What is the demand for installed capacity
The energy storage inverter power is greater than the module, and the battery is greater than the energy storage inverter.
Only need one hydride energy storage inverter be used
Yes, the hybrid energy storage inverter has the function of mppt to connect the components, and then there are acdc and dcdc, which can be connected to the battery.
Compared with ACcouple, Hybrid is a PCS-like machine. The delivery time will be shorter, and the cost will be 20% higher, and the price will be about 20% higher. Many people prefer to choose Hybrid. In addition, PCS generally refers to energy storage inverter that are not connected to photovoltaics. Here are Top 10 pcs energy storage manufacturers.
If the households use inverters, will they still use micro-inverter
If the power of the components is relatively small, micro-inversion is more suitable. But now for high-power products such as households, such as more than 5kW, Hybrid can be used for inverters. At present, in the European market, there is no micro-inversion from the configuration we choose with customers.
However, for some small power, for example, some power grids have demand for micro-inverters, and even some places have regulatory requirements, and micro-inverters must be equipped.
Can the hybrid inverter be connected to the grid
Yes, the all-in-one machine can be connected to the grid.
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