Electricity storage systems are becoming economical
Published
Photovoltaic systems are already a financially rewarding investment for homeowners today. Coupled with a solar power storage system, the profit will increase even more in the future. This is because storage systems are on the verge of becoming economically viable. This is the result of calculations by the Solar Cluster Baden-Württemberg.
The limit is 1000 euros/kWh
In the last twelve months, the costs for storage batteries for PV systems have fallen by an average of more than 10 %. "In the first quarter of 2017, they were in some cases only around 1150 euros per kWh of storage capacity," says Carsten Tschamber from Solar Cluster. The limit below which the small storage systems bring in more than they cost when used for 20 years is around 1000 euros, assuming a small increase in electricity prices. If you subtract the KfW subsidy, which decreases every six months, the first storage products already reach economic viability with good planning. By the end of the subsidy in 2018, the batteries could become up to 20 % cheaper - a purchase would then be worthwhile for the consumer even without government subsidies.
The cost of solar electricity from new PV systems on residential buildings has now fallen to as low as 8 Ct/kWh - household customers pay more than three times that for grid electricity. That is why it is worthwhile for them to consume as much of it as possible themselves. Solar batteries help to double self-consumption from 30 to 35 to up to 70 %.
Source: Post from 23.5.2017 on www.geb-info.de (no longer online, as of January 2021)
There, projects are listed that are considered to be type representatives of certain themes that are still frequently mentioned in sustainable settlements and neighbourhoods today.
Parliamentary State Secretary Rita Schwarzelühr-Sutter of the BMUB (3rd from left) hands over the grant notification for 10.4 million euros to SWLB. On the photo: Ursula Keck (Deputy Chairman of the Supervisory Board of SWLB and Mayor of Kornwestheim, left), Werner Spec (Chairman of the Supervisory Board of SWLB and Mayor of the City of Ludwigsburg, 2nd from left), Managing Director of SWLB, Bodo Skaletz (3rd from right), Steffen Bilger (Member of the Bundestag, 2nd from right), Jürgen Walter (Member of the Bundestag, right).
Stadtwerke Ludwigsburg-Kornwestheim is building one of the largest solar thermal plants in Germany with a collector area of over 10,000 m². The way is clear for another forward-looking project in Ludwigsburg: Stadtwerke Ludwigsburg-Kornwestheim GmbH (SWLB) has won the funding call for municipal climate protection model projects as part of the national climate protection initiative of the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety in Berlin.
Their funding application for the SolarHeatGrid model project for the 'construction and connection of one of the largest solar thermal plants in Germany to an optimised heating network', in which the City of Ludwigsburg is involved as a cooperation partner, was approved. The official handover of the Municipal Climate Protection Model Project grant to Bodo Skaletz, Managing Director of SWLB, took place on 12 May 2017 by Rita Schwarzelühr-Sutter, Parliamentary State Secretary of the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety, in the presence of the Lord Mayor of the City of Ludwigsburg and Chairman of the Supervisory Board of SWLB, Werner Spec, and the Lord Mayor of the City of Kornwestheim and Deputy Chairman of the Supervisory Board of Stadtwerke.
"In terms of the amount of funding, our solar thermal project is the front-runner in the ranking of the seven projects that were also approved. The federal government is contributing 10.4 million euros to the realisation of Ludwigsburg's large-scale project, which should inspire imitation throughout Germany," says a delighted Bodo Skaletz, Managing Director of SWLB.
"This renewal of the district heating network with solar heat is particularly forward-looking with regard to the feasibility of municipal heat supply with renewable energies. Swapping fossil for renewable - it works. I congratulate Ludwigsburg on this major high-tech piece of the puzzle, also in terms of CO2 savings and improved energy efficiency," confirms Parliamentary State Secretary Rita Schwarzelühr-Sutter.
"The 'SolarHeatGrid' is an important building block in the implementation of our overall energy concept for Ludwigsburg," explains Mayor Werner Spec. "We are thus significantly expanding our heat supply on a renewable basis and linking it across municipal boundaries. This is entirely in the spirit of sustainable settlement development: as cities, we must continue to commit ourselves locally with all our strength to environmental and climate protection."
The official start of this lighthouse project is 1 June 2017. The model project is scheduled to take a total of three years. As part of the project, the existing Ludwigsburg district heating network, which already provides heat for large parts of the city using mainly renewable raw materials, will be merged with the Rotbäumlesfeld, Technische Dienste Ludwigsburg (Gänsfußallee 21) and Kornwestheim-Nord networks, which are currently still supplied with fossil fuels. The construction of the solar thermal plant in connection with a large heat storage tank, which is to be built at the location of the CHP plant, will additionally feed high-quality, regeneratively generated heat into the expanded interconnected grid. This will further increase the amount of heat from renewable energies. With the help of the heat storage facility, the energy generated will also be available when there is little or no solar radiation.
The base load heat of the fossil-fuelled heating centres of the individual grids can thus be replaced by the largely regeneratively generated heat of the expanded interconnected grid. Approximately five kilometres of new district heating pipes will be laid over the next three years to connect the solar thermal system and the interconnected grid. In addition to the CO2 savings that will be achieved through the growing share of renewable energies in the expanded district heating network, the declared goal of the large-scale project is to increase energy efficiency. "In order to ensure that energy is used as efficiently as possible, it is not only the heat generation and distribution by SWLB that is decisive, but also the consumer side," Skaletz explains and adds: "As part of the network interconnection, measures are therefore to be implemented to reduce the so-called return temperatures, on which the performance of our district heating network depends to a large extent."
SWLB submitted the funding application in November 2016. The project aims to increase the share of renewable energies in the district heating network and to actively promote local climate protection and the energy transition at the local level by reducing CO2 emissions. More information on the municipal climate protection model project at: www.swlb.de/solar-heat-grid
PM of the Stadtwerke Ludwigsburg-Kornwestheim from 12.05.2017
Commenting on the agreement between the EU Commission, Council and Parliament on the further expansion of renewable energies in Europe Julia Verlindenspokeswoman for Alliance 90/The Greens in the German Bundestag for energy policy:
The German government has been unsuccessful in putting the brakes on community energy. Europe is now ensuring that the hurdles and fees for self-generation and consumption of renewable electricity are lowered. The storage and sale of electricity from small systems will also become much easier thanks to the EU regulations. This is good news from Brussels for the decentralised energy transition and the participation of people in the conversion of their energy supply.
In contrast, the expansion target for renewable energies in Europe is falling far short of requirements. Economics Minister Altmaier is currently driving the energy transition against the wall, and not just in Germany. He has also done his utmost in Brussels to ensure that the expansion targets are set too low. We need much more renewable energy and also more energy efficiency in order to ensure a clean energy supply and achieve the Paris climate protection targets. After all, climate protection is about nothing less than our livelihoods.
Press release Alliance 90/The Greens from 14 June 2018
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