3PH 6.6KTL-V3
ZCS Azzurro 3PH 6.6KTL-V3 three-phase string inverter, 6,6 kW with 2 independent MPPTs and Zero Feed-in function. Integrated interface protection: below the CEI 0-21 threshold of 11,08 kW, no external panel is required. IP65, 10-year warranty.
The ZCS Azzurro 3PH 6.6KTL-V3 three-phase string inverter is designed for residential and small commercial photovoltaic systems up to 6 kW nominal. Two independent MPPTs, Zero Feed-in function and integrated interface protection according to the CEI 0-21 standard make it a compact solution without additional external components.
Why choose a 6,6 kW three-phase string inverter?
On three-phase systems, distributing power across three phases reduces load imbalances and allows full use of 4,5-6 kW contracted meters. The 3PH 6.6KTL-V3 works with typical DC power up to 7.920 W, so it accepts oversizing of the photovoltaic array beyond the nominal AC power of 6.000 W, within the limits of the two MPPTs.
3PH 6.6KTL-V3 technical specifications
| Nominal AC power | 6.000 W (6.600 VA maximum) |
| Typical DC power | 7.920 W |
| Independent MPPTs | 2 (1 string per MPPT) |
| MPPT voltage range | 140-1000 V |
| Maximum DC input voltage | 1100 V |
| Absolute maximum current per MPPT | 22,5 A |
| Maximum phase AC current | 10 A |
| Maximum efficiency | 98,4% |
| Interface protection | Integrated |
| Communication | RS485, USB, optional Wi-Fi/4G/Ethernet, Bluetooth |
| Protection rating | IP65 |
| Weight and dimensions | 17 kg, 430x385x182 mm |
| Warranty | 10 years (with registration) |
When is the 6,6 kW three-phase variant worthwhile?
The CEI 0-21 standard threshold for mandatory external interface protection and dedicated SPI panel is 11,08 kW: the 3PH 6.6KTL-V3, with 6 kW nominal, remains below the threshold and integrates the interface protection directly in the inverter. In the same series, the 11KTL and 12KTL sizes exceed 11,08 kW and require external protection: a difference that the ZCS datasheet does not highlight but that affects the system quote.
What is included in the supply?
- ZCS Azzurro 3PH 6.6KTL-V3 inverter with integrated DC switch-disconnector
- Wall mounting bracket
- Installation and quick configuration manual
- Access to the ZCS monitoring app and portal
Frequently asked questions
Is the 3PH 6.6KTL-V3 a hybrid inverter with battery?
No, it is an on-grid string inverter: it converts photovoltaic production for grid feed-in and instantaneous self-consumption, but it does not manage storage batteries. For storage, a hybrid inverter from the ZCS HYD range is required.
Is an external interface panel required to install it?
No: at 6 kW nominal it remains below the CEI 0-21 threshold of 11,08 kW and the interface protection integrated in the inverter is sufficient, without external SPI or additional test report.
What does the Zero Feed-in function mean?
It is the possibility to limit or zero the power fed into the grid, useful for systems with contractual constraints on energy export. It requires a dedicated meter or the Azzurro communication hub, not included in the basic supply.
How many panels can I connect to the two MPPTs?
It depends on the string voltage: the MPPT range goes from 140 V to 1000 V, with an absolute maximum voltage of 1100 V and maximum current per MPPT of 22,5 A. The official ZCS configurator calculates the exact configuration based on the selected module.
Is it compatible with app monitoring?
Yes, via the ZCS Azzurro app and web portal, with data updates every 5 minutes. Monitoring via Wi-Fi, 4G or Ethernet requires an optional communication module not included.