2013-06-20 | Bosch Group | Product News
Stuttgart/Munich – At the Intersolar Europe exhibition in Munich (June 19-21), Bosch will be presenting its wide range of electricity storage systems for making solar and wind power available when it is needed. The storage systems are available in capacities to suit applications from individual homes to small towns. There are two reasons why storage is an essential part of Germany’s move to alternative forms of energy, known as the “Energiewende.” First, it keeps the electricity supplied from intermittent wind and solar sources in reserve for later use. Second, it helps integrate renewable energy into the power grid. People use these storage systems to give themselves a degree of independence from energy suppliers.
Storage for the home
One of the Bosch products to be seen at the world’s leading exhibition for the solar industry and its partners is Bosch Power Tec’s BPT-S 5 Hybrid. The size of a refrigerator, this electricity storage system is suited to home use, storing the electricity a photovoltaic system generates during the day so that a family can draw it down when the sun is not shining any longer. The BPT-S 5 Hybrid is available with a basic storage capacity of 4.4 kWh, which can be expanded as required in modular steps of 2.2 kWh up to a maximum of 13.2 kWh. The BPT-S 5 Hybrid is the world’s only PV storage system to have received security certification for all components of the system from an independent institute. This satisfies the highest international safety standards. Bosch Power Tec has already amassed 200,000 hours of experience with its electricity storage systems.
Particular attention has been paid to the safety of the batteries: with sophisticated software monitoring each individual battery cell and clever design solutions in the construction of its housing, this system is in a safety class of its own.
As of May 1, 2013, a market incentive programme by the German Federal Ministry for the Environment (BMU) is in effect. It subsidises stationary decentralised battery storage systems connected to a photovoltaic system, which is connected to the electrical grid. The qualification for the subsidy programme is linked to strict technical requirements. Available since last year, the BPT-S 5 Hybrid by Bosch Power Tec is fully eligible, as it fulfils all technical requirements. Continuous reduction of feed-in performance to 60 percent is required to help relieve the local grid. The Bosch storage system meets this requirement in an easy and intelligent manner.
Bosch Energy Storage Solutions
Bosch Energy Storage Solutions will also be showcasing much larger solutions with the capacity to store multiple kilowatt hours or even megawatt hours of electricity. Systems that can store up to 100 kilowatt hours can be used in industry to cover expensive peak loads. By way of comparison, 100 kilowatt hours is enough to iron 1,500 shirts, to cook 400 lunches on a cooker, or to power the LED lighting for a community of 2,000 people. Storage systems in the megawatt-hour range can be used to optimize the integration of strongly intermittent wind and solar power supplies.
In 2013, Bosch is looking to build a megawatt-scale battery system in the north of Germany, then integrate it into the power grid and operate so as to stabilize the grid and improve the integration of wind power. The battery will be able to offer a capacity of one megawatt for up to four hours – in other words, it can supply four megawatt hours. This is equivalent to supplying a whole day’s power to 400 homes.
Weather is the deciding factor
These batteries feature software designed in-house that tells them exactly how much electricity is being generated and consumed at any given time. This means the systems themselves can decide whether to store power or feed it into the grid. Using weather forecasts, they can also calculate whether to store power for the following day. In tomorrow’s smart grids, batteries large and small will serve to ensure the best possible balance between electricity supply and demand. In Braderup, in northern Germany, Bosch Energy Storage Solutions is currently putting in place one of Europe’s biggest batteries to store the output of an entire wind farm.
On request, Bosch can analyze a project to determine the size of storage system it requires. The company also offers to carry out detailed planning work for turnkey solutions. Software developed especially for this kind of energy audit guarantees an optimum design both for the system and for operation.
The German federal government expects renewable energy’s share of gross energy consumption to reach 19.6 percent by 2020. It also sees as much as half the country’s electricity demand being met from renewable sources by 2030. What is more, making increasing use of renewables is a key to protecting the climate. Consequently, changing the energy system to make it more sustainable is a necessity on many levels.
Information on the Bosch exit from crystalline photovoltaics
On March 22, 2013, Robert Bosch GmbH announced that it will end its crystalline photovoltaic business and the development, production, and sale of ingots, wafers, cells, and modules by the beginning of 2014.
Bosch Power Tec GmbH is not affected in its role as a supplier of highly efficient solar inverters and groundbreaking electricity-storage technologies.