Modular backup automatic power switch for generators | solar | photovoltaic systems | 4P | 100A | 230V | DIN

Modular Automatic Transfer Switch 4P 100A – For PV systems, generators, and backup power

Modular backup automatic transfer switch 4P 100A, designed for automatic switching of power supply between main and backup sources. The device can be used in solar photovoltaic systems, generator systems, residential buildings, commercial premises, and electrical distribution boards where reliable power source switching is required between PV inverter, generator, or grid power.

• In solar power plants and PV systems – for switching between PV inverter and grid.
• In generator systems – to manage backup power during grid failures.
• In residential buildings – when using autonomous or hybrid power supply.
• In commercial and industrial premises – when backup power and automatic source switching are required.
• In uninterruptible power solutions – where fast load switching between two sources is important.

For example, the switch is mounted on a DIN rail in the distribution board. One input side is connected to the PV inverter or generator, the other to the city grid, and the output is connected to the protected load circuit. The switch monitors the status of the sources and automatically switches the load to the appropriate power source.

In this way, it can be ensured that when solar energy is insufficient or the voltage becomes unsuitable, the load is switched to the backup city grid or another intended source. Return can be delayed so that the system does not react to short-term disturbances.

The automatic transfer switch is an electrical distribution and control component, therefore, before installation, it is necessary to assess the type of power sources, load, cable cross-sections, protection devices, grounding, inverter or generator compatibility, and the specific electrical scheme.

• Installation must be performed by a qualified electrician in compliance with applicable electrical safety requirements.
• Do not exceed 100 A rated current – excessive load can damage the device or cause overheating.
• Before connection, it is necessary to check if the switch is suitable for the specific PV inverter, generator, and grid system.
• Must use appropriate protection devices – circuit breakers, surge protection, RCD/RCBO, and others are selected according to the scheme.
• Do not connect two sources without a proper scheme – incorrect connection can cause dangerous voltage to be applied to the wrong circuit.
• For sensitive loads, it is recommended to evaluate whether the switching time is sufficient and if an additional UPS solution is needed.

Quick selection guide

Modular Automatic Transfer Switch 4P 100A 230V – a suitable choice when you need to automatically switch the load between two power sources: PV inverter, generator, or city grid. The device is DIN rail mounted and can be used in backup power systems.

Automatic switching between solar, grid, and backup power

The modular automatic transfer switch 4P 100A helps ensure a smoother power supply in systems where multiple power sources are used – solar inverter, generator, or grid.

Thanks to automatic and manual modes, voltage protection functions, DIN mounting, and 100 A rated current, this switch is a practical solution for domestic, commercial, and technical backup power systems.