QIT40-1
QIT40-1 is a 40kWp interface panel for 1 three-phase inverter, designed for photovoltaic systems connected to the low-voltage grid.
A solution compliant with the CEI 0-21 standard, with IP65 protection and SPI test report included: less paperwork, faster on site.
The 40kW QIT40-1 interface panel is designed for photovoltaic systems with 1 three-phase inverter connected to the low-voltage grid. It is a ready-to-use solution for installers and electricians who need to manage the interface protection according to the CEI 0-21 standard, with the technical documentation required for the grid connection application.
Why is a photovoltaic interface panel needed?
In grid-connected photovoltaic systems, the interface protection system checks that voltage and frequency stay within the permitted limits. If the grid parameters move outside the allowed thresholds, the device trips and disconnects the system to prevent non-compliant feed-in. This is why the interface panel is a key component in installations subject to CEI 0-21 requirements and grid operator checks.
QIT40-1 technical specifications
| Product code | QIT40-1 |
| Type | Photovoltaic interface panel |
| Rated power | 40 kWp |
| Supported inverters | 1 three-phase inverter |
| Main isolator switch | 4x100A with 230V shunt trip coil |
| Surge arrester | Three-phase class II, Imax 20kA |
| DDI contactor | 4P 95A AC-3 (interface device) |
| Interface relay | CEI 0-21 compliant (SPI) |
| Inverter protection | RCBO 4x80A 16kA 300mA class A |
| Protection rating | IP65 class II |
| Certification | CEI EN 61439-1/2 |
| Documentation | SPI test report included |
| Dimensions (WxHxD) | 610 x 820 x 300 mm |
| Weight | 10 kg |
When is the interface panel required?
The interface panel is used when the photovoltaic system requires an external interface protection system or specific documentation for the grid connection. In practice, it mainly concerns professional and commercial installations, where the installer must present the local grid operator with a solution consistent with the CEI 0-21 standard and the technical requirements of the connection application.
What is included in the supply?
- Interface panel QIT40-1 for a 40kWp photovoltaic system.
- Configuration for 1 three-phase inverter.
- IP65 protection rating, suitable for technical environments and protected installations.
- SPI test report included, useful for the installer, designer and connection application.
- Solution ready to be integrated into the system's electrical panel.
Why buy it on MR WATT?
MR WATT selects components for photovoltaic installers who look for technical, well-documented products that are ready for the field. The advantage here is not only the panel: it is having a clear product sheet, a targeted supply and a product designed to cut wasted time during the connection phase. In short: when the test report is missing, the connection paperwork grinds to a halt — MR WATT includes it from the start.
Frequently asked questions
Is the QIT40-1 suitable for a 40kW photovoltaic system?
Yes, the QIT40-1 is designed for 40kWp photovoltaic systems with one three-phase inverter. It is the right choice when you need interface protection compliant with CEI 0-21 with the SPI test report included.
What does "SPI test report included" mean?
The SPI test report documents the tests of the Interface Protection System. It is a useful document for the connection application and for the checks required by the local grid operator.
Is the QIT40-1 interface panel compatible with any three-phase inverter?
It is designed for systems with one three-phase inverter, but compatibility should always be checked against the system's electrical diagram and the requirements of the designer or grid operator.
Does the IP65 rating allow outdoor installation?
IP65 indicates protection against dust and water jets. Even so, it is good practice to install the panel in a protected position, respecting technical guidelines, sun exposure and ventilation.
Which documents are needed to connect a photovoltaic system?
Typically you need the system's technical documentation, declarations of conformity, the electrical diagram and the documents relating to the interface protection. The included SPI test report helps to complete the technical part of the application.
