Three-phase AC panel with RCD - 25A

Three-phase 10/12 kW photovoltaic AC panel with SPI and CEI 0-21 interface device for a single inverter

The three-phase 10/12 kW photovoltaic AC panel with an interface protection system (SPI) and a CEI 0-21 compliant interface device is an electrical panel designed for the management, protection, and control of the alternating current (AC) side in residential, commercial, and professional photovoltaic systems connected to the low-voltage distribution grid.

The electrical panel is configured to manage a single three-phase photovoltaic inverter of 10 kW or 12 kW. It integrates electrical protection, isolation, control, and interface systems designed to ensure proper coordination between the inverter, distribution lines, and the electrical grid in accordance with Italian technical regulations for the connection of power generation systems.

This AC panel for photovoltaic systems allows the safe connection of the inverter to the electrical grid, ensuring compliance with the technical requirements set out by the CEI 0-21 standard for connecting power generation systems to the low-voltage distribution grid.

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Function of the AC panel in photovoltaic systems

The photovoltaic AC electrical panel represents the interface between the photovoltaic inverter and the electrical grid. Its main function is to manage the alternating current side of the system, ensuring electrical safety, operational continuity, and component protection.

The interface protection system (SPI) constantly monitors electrical grid parameters such as:

• grid voltage
• frequency
• phase imbalances
• line operating conditions

In the event of anomalies or conditions that do not comply with the limits set by the regulations, the system automatically intervenes by disconnecting the photovoltaic system from the grid to prevent damage to the components and ensure the safety of the electrical system.

In photovoltaic systems, the AC panel also enables the coordination of electrical protections between the inverter, distribution line, and grid, reducing the risk of faults and improving the reliability of the power generation system.

The panel configuration is designed to provide orderly management of connections, protection against overvoltages, and an interface compliant with the requirements for low-voltage connection.

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Main features of the 10/12 kW photovoltaic AC panel

• AC side management for a single three-phase photovoltaic inverter of 10 kW or 12 kW
• Panel rated current 25A at 400 Vac
• SPI interface protection system compliant with the CEI 0-21 standard
• Interface device equipped with a backup power supply of more than 5 seconds
• Type 2 3P+N 40kA 420 Vac SPD surge arrester
• 4-pole 25A C-curve magnetic-thermal protection
• 4-pole 300 mA Type A residual current circuit breaker
• 40A 4NA 230 Vac contactor for automatic line isolation
• Fuse holder with gG 10.3x38 fuses
• Wall-mounted ABS enclosure with IP65 protection rating

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Applications of the three-phase photovoltaic AC panel

• Residential and commercial three-phase photovoltaic systems
• Photovoltaic installations with a single 10 kW or 12 kW inverter
• Systems connected to the low-voltage grid in accordance with CEI 0-21
• Photovoltaic systems for homes, offices, and small businesses
• Applications requiring interface protection and automatic isolation
• Solar-powered electricity generation systems
• Outdoor or technical environment installations thanks to the IP65 enclosure

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Components included in the AC electrical panel

• 1 wall-mounted ABS enclosure with IP65 rating, 18+18+18 modules
• 2 4-pole 25A C-curve magnetic-thermal circuit breakers
• 1 4-pole 300mA Type A residual current circuit breaker
• 1 Type 2 3P+N 40kA 420 Vac SPD surge arrester
• 1 CEI 0-21 SPI interface equipped with a backup power supply of more than 5 seconds
• 1 40A 4NA 230 Vac contactor
• Fuse holder with gG 10.3x38 fuses
• Input and output terminals
• Ground bar
• Internal wiring
• Cable glands
• Component identification and safety labeling
• Electrical diagram and visual connection instructions
• Wall mounting anchors and screws
• Test report available upon request (item 7635984)

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Technical specifications of the photovoltaic AC panel

Panel type	Three-phase photovoltaic AC electrical panel with SPI interface protection
Inverter configuration	1 three-phase inverter of 10 kW or 12 kW
Rated current	25A
Rated voltage	400 Vac
Connection standard	CEI 0-21
Overvoltage protection	Type 2 3P+N 40kA 420 Vac SPD
Residual current protection	4-pole 300mA Type A residual current circuit breaker
Enclosure protection rating	IP65

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Installation of the AC electrical panel for photovoltaic systems

The AC electrical panel is designed for wall mounting in technical rooms, service areas, protected outdoor areas, and electrical installation environments dedicated to the management of photovoltaic systems.

The ABS enclosure with an IP65 protection rating ensures high protection of electrical components against dust and external agents, ensuring operational reliability even in harsh environmental conditions.

The supply includes accessories for wall mounting, an appropriate number of cable glands for connecting the input and output cables, and paper documentation useful for correctly connecting the panel.

The sizing and configuration of the panel must be verified by the photovoltaic system designer or a qualified electrical installer based on the inverter power, grid characteristics, and the requirements of the distribution grid operator.

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Frequently asked questions about the photovoltaic AC panel

What is the SPI system in photovoltaic systems

The interface protection system (SPI) is a safety device that constantly monitors electrical grid parameters such as voltage and frequency and automatically disconnects the photovoltaic system in the event of anomalies or conditions that do not comply with the limits set by the regulations.

For which systems is this AC panel designed

The AC panel is designed for photovoltaic systems with a single three-phase inverter of 10 kW or 12 kW connected to the low-voltage distribution grid.

What does the CEI 0-21 standard establish

The CEI 0-21 standard defines the technical rules for connecting power generation systems to the low-voltage distribution grid, establishing the safety, protection, and interface management requirements between the system and the grid.

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Related search terms

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