Frequently Asked Questions (FAQ) about Battery and Storage Technology
Please understand that this section is still under construction.
Which memory size is right for me?
The ideal memory design depends strongly on the application and the customer load profile. We will be happy to advise you!
What does a memory consist of?
A storage system essentially consists of capacity and performance. The capacity is provided by battery cells, which are interconnected in modules, which in turn are installed in racks. The power is provided by converters. In addition, an energy management system is required to control and monitor energy flows and a meter to measure consumption. Depending on the application, a frequency measurement may also be required.
How large is a memory?
A 100 kWh storage with an output of 100 kW has a floor area of approx. 1.2 square metres and a height of approx. 2.2 metres (excluding traffic areas).
Lifetime – How long do lithium batteries live?
High-quality battery cells in industrial storage applications are not comparable with battery cells from normal “home applications”, e.g. mobile phones, laptops etc..
As a rule, only batteries with long-term warranties (at least 5, usually 10 years) are used, which in turn can be extended to 15 years. Laboratory tests of used batteries have shown that the service life is expected to exceed 15 years in typical applications and that 20 years is also possible.
Batteries in storage systems also have a much higher service life expectancy than in other applications due to the environmental conditions (temperature, current load, etc.) which are always adhered to exactly.
What is Peak Shaving?
Industrial customers in Germany (from 100,000 kWh consumption) pay not only for the amount of energy purchased but also for the highest peak load, i.e. for the output. This is recorded by a so-called recording load curve measurement (RLM), which records the quarter-hour average values. If the storage tank is used to minimize these peak loads by targeted discharge, the peak loads are “shaved off” – peak shaving.
How fast does the capacity decrease?
In tests conducted internally by Smart Power, the aging of the batteries used by Smart Power is approximately 1% per year for most applications.
What is control power?
Since the power grid has no possibility to store energy, the amount of energy or power that is fed into or drawn from the power grid must be identical at all times. In order to achieve this goal, there are loads that can be switched off, which can be actively switched off by the grid operators, and on the generator side the so-called control power. Depending on the type, the supplier undertakes to reduce or increase the generation capacity within the shortest possible time – or, in the case of the storage facility, to absorb or release energy.
What happens after the lifetime with the system?
According to the Battery Act, every “distributor” of batteries must dispose of them properly or have them disposed of after their service life. However, the customer must deliver the battery system to the appropriate collection points. Smart Power takes over this service for the customer and also takes care of dismantling the system, professional transport and environmentally friendly disposal for the customer after further use has been tested.
What happens if the system is defective?
The systems are equipped with long-term guarantees. Should anything break down, the modular design of the systems means that individual battery modules can be replaced or the inverter repaired at any time.
Is lithium batteries safe?
Lithium batteries have a very high energetic potential and therefore a risk that cannot be neglected if handled incorrectly. For this reason, all battery systems used by Smart Power are equipped with a battery management system that permanently monitors the functions of the battery system. This includes the voltage of each individual cell as well as several temperature sensors per module.
In addition, redundancies are created to prevent, for example, the inverter from operating the batteries outside the permissible range.
Do you need a fire extinguishing system?
The battery systems used by Smart Power provide a very high level of safety. In addition, regular maintenance further reduces the risk of battery systems emanating from the system.
Nevertheless, it is advisable to install a fire extinguishing system if there is sufficient space to prevent external fire events from spreading to the battery storage unit and to directly combat an incipient fire.
Which fire protection requirements apply?
The exact requirements vary from region to region and also partly depend on the company and the environmental conditions. F90 should be used to separate fire endangered sections or sections with a high fire load. Occasionally, special requirements are also required for escape routes.