SecSun UBM2102L PV Combiner Box AC/DC 6kW 2 Strings
The SecSun UBM2102L is an AC/DC combiner box (string box) for photovoltaic systems up to 6 kW with 2 strings (600 VDC, 16 A): integrated DC and AC disconnectors and surge arresters. IP65, class II, EN 61439 compliant.
The SecSun UBM2102L is a pre-wired AC/DC combiner box (string box) for photovoltaic systems up to 6 kW with 2 strings (600 VDC, 16 A). It groups into a single IP65 enclosure the disconnection and protection devices between the PV strings, the inverter and the grid, on both the DC and AC sides.
What is the UBM2102L for?
With two independent strings, the box provides ordered string combination and the disconnection and overvoltage/overcurrent protection required between modules, inverter and grid. Pre-wired and certified to CEI EN 61439-1/2, it saves the installer from assembling the individual protections on site.
Technical specifications
| Model | SecSun UBM2102L |
| Configuration | 6 kW, 2 strings |
| DC side | 600 VDC, 16 A; string fuse-disconnectors and surge arresters |
| AC side | Differential circuit breaker (RCBO) and surge arrester |
| Protection rating | IP65, insulation class II |
| Standard | CEI EN 61439-1/2 declaration of conformity |
| Dimensions | 622 × 432 × 161 mm (H×W×D) |
| Weight | 5 kg |
Frequently asked questions
What is a combiner box for in a PV system?
It concentrates the disconnection and protection devices between modules, inverter and grid in a single certified enclosure: DC and AC disconnectors, fuses and surge arresters. It protects the equipment and allows the system to be isolated at a single point for safe maintenance.
Is the UBM2102L suitable for my system?
It is sized for systems up to 6 kW with 2 strings (600 VDC, 16 A). Check that the voltage, current and number of strings of your system match these values before ordering.
Can it be installed outdoors?
Yes. The IP65 rating protects against dust and water jets, so it can be installed outdoors or in a technical room, preferably shielded from direct sunlight and extreme temperatures.
Who should install it?
Installation and connection must be carried out by a qualified electrician, respecting the polarities, tightening torques and the applicable regulations.
