ZZ3-AC-BOX-150
AC Combiner Box ZCS Azzurro ZZ3-AC-BOX-150 for connecting 2 three-phase 50KTL-V3 string inverters in parallel, forming an equivalent 100 kW unit. 2 AC inputs, maximum 250 A output, IP54.
The ZCS Azzurro AC Combiner Box ZZ3-AC-BOX-150 is the paralleling panel that combines the output of two three-phase 50KTL-V3 string inverters into a single connection point, simplifying the wiring of medium-to-large commercial and industrial photovoltaic systems.
Why do you need an AC Combiner Box?
When a system exceeds the power of a single inverter, the most cost-effective solution is not always a larger inverter: connecting two 50KTL-V3 units in parallel through this combiner brings the total power to 150 kW with a single output point to the main panel, reducing wiring work and on-site labor costs.
ZZ3-AC-BOX-150 technical specifications
| AC inputs | 2 (from 2 50KTL-V3 inverters) |
| Maximum AC current per input | 125 A |
| Maximum AC output current | 250 A |
| Maximum active power | 150 kW |
| Rated AC voltage | Three-phase 3/N/PE, 230/400 V |
| Rated frequency | 50/60 Hz |
| Protection rating | IP54 |
| Weight and dimensions | 34 kg, 760x786,5x202,5 mm |
When is the AC combiner used instead of a single inverter?
It is the typical solution when the project is already sized around 50 kW modules (for logistics, redundancy, or stock availability) but requires a single delivery point to the paralleling panel or the MV/LV transformer. With protection against water and overvoltage, it is suitable for both industrial rooftops and large ground-mounted systems.
What does the supply include?
- IP54 AC Combiner enclosure with 2 inputs and 1 output
- Integrated overvoltage protection
- Installation and connection manual
Frequently asked questions
Which inverters is the AC Combiner Box ZZ3-AC-BOX-150 compatible with?
It is specifically sized for paralleling two three-phase ZCS Azzurro 50KTL-V3 inverters, for a total of 100 kW of installed power manageable on a single output with a maximum of 150 kW.
Can I connect just one inverter instead of two?
Technically yes, but it makes no practical sense: the combiner is designed to unify two outputs into one, so its advantage is achieved only with the two-inverter parallel configuration.
Is an external interface panel required in addition to the combiner?
Yes: at these power levels, well above the CEI 0-21 threshold of 11,08 kW, the project still requires an interface panel with dedicated DDI and SPI protection, sized according to the total power of the system.
Is it also suitable for ground-mounted installations?
Yes, the manufacturer explicitly states that it is suitable for both rooftop systems and large ground-mounted power units, thanks to IP54 protection against water and overvoltage.
How much does it weigh and how much space does it take up on site?
34 kg for 760x786,5x202,5 mm: a wall-mounted or dedicated structural fixing point must be provided, capable of supporting the weight at full wiring load.