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AC Combiner Box 20 A Single-Phase with Type 2 SPD
AC Combiner Box 20 A Single-Phase with Type 2 SPD
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€108.09
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€108.09
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Businesses and non-Italian private customers: purchase with 22% VAT. The 10% rate is reserved for private customers resident in Italy — find out more.
Foreign companies entitled to 0% VAT: please write to info@litio.store.
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AC Combiner Box 20 A Single-Phase with Type 2 SPD
Alternating current combiner box for single-phase photovoltaic systems: it is installed on the AC side of the system, between the inverter output and the building's electrical distribution board. It is the pre-wired solution for creating a tidy, quick protection point on the line connecting the inverter to the grid, avoiding the need to assemble a dedicated enclosure on site.
Inside are a 20 A miniature circuit breaker, which protects the AC line against overload and short circuit and allows the inverter to be isolated for maintenance work, and a Type 2 surge protective device (class II), which limits surges of indirect atmospheric and switching origin coming from the grid, protecting the inverter electronics. A current of 20 A on a 230 V single-phase grid corresponds roughly to inverters up to about 4.6 kW.
Key features
AC line protectionThe 20 A miniature circuit breaker protects the cable between the inverter and the main board against overloads and short circuits.
Type 2 surge arresterThe class II SPD limits surges induced by indirect lightning strikes and grid switching operations, safeguarding the inverter.
Pre-wired and ready to useThe box is already assembled: only the line coming from the inverter and the one going to the distribution board need to be connected.
Sized for single-phase systems20 A on a 230 V grid: a size suited to single-phase inverters with an indicative power output of up to about 4.6 kW.
Compact footprintEnclosure measuring 202 × 201 × 120 mm and weighing 1.1 kg, which can be wall-mounted next to the inverter.
Inverter isolationThe circuit breaker makes it possible to isolate the inverter from the grid during maintenance and inspections.
Technical specifications
| Feature | Value |
|---|---|
| Switchboard type | AC combiner box for photovoltaic systems |
| System side | Alternating current (AC), between the inverter and the distribution board |
| Number of poles / phases | Single-phase (L + N) |
| Nominal current | 20 A |
| Indicative inverter power | Up to approx. 4.6 kW (230 V, 20 A) |
| Surge protective device (type) | Type 2 SPD (class II) |
| Miniature circuit breaker (MCB) | Sì, 20 A |
| Residual current device (RCD) | Not present |
| Dedicated isolator switch | Not present: isolation is provided by the miniature circuit breaker |
| Dimensions | 202 × 201 × 120 mm |
| Weight | 1.1 kg |
| Reference standards of the components | EN 61643-11 (surge protective devices), EN 60898-1 (miniature circuit breakers) |
Installation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.