APPROPRIATE · SUPPLEMENTARY ROM
Replacement current &
Switch.
Changeover request for your planned replacement power supply.
From the selected circuit to the planned building concept: Tell TP ENERGY your devices and your supply target. We agree with you on the type of accessories you need.
On this page
Set the power supply.
Select the required switching mode. A click on the icon image opens the properties. With "Request offer", you transmit exactly this type for your PV storage system.
The right switch for your supply target.
A PV system with storage does not automatically supply the building in case of grid failure. For this purpose inverters, memory, switching and protective concept must be suitable together. The switching can be integrated in the device or executed as an external device.
Manual power/replacement current switch
For a scheduled switch by hand. Ask with inverter, memory and the planned replacement circuits.
Request a quote: Manual power/replacement current switch
Characteristics and use: Manual power/replacement current switch
Operation
A manual switch switches to operation between the intended power supply and replacement power supply. It is selected for the planned system. A simple switch itself does not generate any electrical energy or a stable island grid.
Operation
The switching sequence and the return to grid operation are based on the approved system concept. In the case of a manual solution, a trained person must be able to take over the intended operation. The time to care also depends on when someone is acting.
Selection and system boundaries
The appropriate switching task, design data, pole number and the matching to the grid form are important. The safe separation from the public grid and the protective concept in replacement power operation are also part of the electrical planning. An arbitrary load disconnector does not replace a suitable switching device.
Automatic switching devices and backup boxes
For the supported automatic switching in the PV storage system. Name your devices and the desired power supply in case of power failure.
Request a quote: Automatic switching devices and backup boxes
Characteristics and use: Automatic switching devices and backup boxes
Operation
An automatic device detects the intended grid states and controls the switching in the coordinated system. Depending on the design, it contains switching devices, monitoring and control connections. Other systems have already integrated parts of this function in the inverter; an additional box is therefore not required at all.
Selection features
The name Backup-Box does not yet describe a uniform functionality. Supported devices, communication and control routes, as well as the behaviour in case of network failure and network return shall be tested. Automatic switching does not automatically mean an uninterrupted supply.
Supply limits
Whether individual circuits or the entire building can be included depends on the system and the load planning. Available power per phase, start-up currents and usable storage energy remain limited. Black start and PV reloading in island operation are own system functions, which must be explicitly confirmed.
Important terms simply explained.
Network parallel operation and island operation
In grid parallel operation, the plant cooperates with the public network. In the intended replacement power island operation, a suitable system supplies a separate part of the system. An ordinary grid-guided PV inverter does not form this grid alone.
Emergency current, replacement current and backup
These terms are used for different solutions: from separate output for individual devices to the supply of planned circuits. The decisive factor is the described function of the concrete system, not only the product name.
Switching time and uninterrupted supply
The switching time describes the interruption when switching the supply. Automatic systems can also have a break. For sensitive consumers it is necessary to examine separately which interruption they tolerate and whether additional supply technology is necessary.
One-phase and three-phase provision
A single-phase replacement current system does not automatically provide three-phase current for three-phase consumers. In the case of three-phase systems, consideration must also be given to the permissible power per phase and unequal loads. The network phases of the building alone do not say anything about it.
Black Start
Schwarzstart means the launch of an appropriate system without an existing public network. He needs the equipment, control functions and an available energy source. A fully unloaded storage unit thus does not provide any additional energy.
Power, energy and reserve
Power describes which consumers can be supplied at the same time; energy influences the possible supply time. Charging status, reserved storage content, consumption and available PV generation are considered together. A fixed runtime cannot be promised from the memory size alone.
What does the selection matter?
First, determine which consumers are to be supplied and what interruption they are to tolerate. This includes required power per phase, start-up behaviour and desired duration. Exact inverter and storage design, software status as well as already integrated replacement current functions are considered. Switch type, grid separation and protective concept sets an electrical specialist for the existing installation.
This information will help us with your offer.
Describe what should be supplied in case of a grid failure. Existing equipment documents and an installation plan facilitate the assignment.
- Desired switching mode and new system, retrofitting or replacement
- Inverter, memory and existing switching device with accurate device generation and software level
- Planned consumers or circuits, phase number and special requirements for interruption or start-up
- Existing system plan, known grid shape and desired functions such as black start or PV reloading
Photos and existing documents can be added directly to the contact form.
Frequently asked questions.
Can a backup box automatically supply the entire building?
This doesn't follow alone out of the box. Inverters, memory, installation and the loads required at the same time determine the scope. Performance limits also remain with a building solution. Name the consumers that are particularly important in the event of a failure.
Is automatic switching always uninterrupted?
No, no, no. The actual switching time is a property of the entire solution. Devices can switch off or restart during this time. If a consumer does not tolerate interruption, please state this explicitly in your request.
Technical basis.
View Sources
The DKE short presentation classifys grid parallel operation, island operation and switching as a joint planning task. The technical documentation shows individual system examples, no general device release. Public standard overviews are not a complete standard text. The electrical planning is done for your system.
DKE: Stationary energy storage systems – planning, operation and switching (VDE-AR-E 2510-2:2021-02)
Technical documentation: manual and automatic replacement current modes (system example)
Technical documentation: Prerequisites for black start (system example)
Request replacement power supplies for your project.
Send us your equipment overview and the desired supply. We clarify the accessories requirements with you and prepare your offer.