SolaX X3-PRO-30K-G2 Three-Phase Inverter 30 kW
The SolaX X3-PRO-30K-G2 is the top model in the range: a 30 kW three-phase string photovoltaic inverter with 3 MPPT, up to 45 kWp of PV array capacity, maximum efficiency of 98,5%, IP66 and Type II SPD on the DC and AC sides. The only size in the series without an AC overload margin: 30 kVA of maximum apparent power, equal to the rated value.
The SolaX X3-PRO-30K-G2 inverter is a 30 kW three-phase string photovoltaic inverter, the most powerful model in the X3-PRO G2 series. It is designed for industrial, agricultural and commercial systems with photovoltaic arrays up to 45 kWp, managed by 3 MPPT trackers with the best efficiency in the range.
A difference the datasheet hides: here there is no 110%
The entire X3-PRO G2 series is promoted with 110% AC overload: the 25 kW delivers up to 27,5 kVA, the 20 kW up to 22 kVA. The 30 kW does not. Its maximum apparent power is 30 kVA, exactly the same as the nominal value, with a maximum output current of 45,5 A identical to the nominal current. In practice, there is no peak margin: the machine works at its own limit and not beyond. This is not a defect, but it changes the calculation of real oversizing and must be kept in mind when comparing this size with two 15 kW units, which together would offer 33 kVA of peak power.
SolaX X3-PRO-30K-G2 technical specifications
| Nominal AC power | 30 kW three-phase 3/N/PE 230/400 V |
| Maximum apparent power | 30 kVA (no AC overload) |
| Nominal / maximum output current | 45,5 A / 45,5 A |
| Recommended PV power | 45 kWp (150% oversizing) |
| MPPT / strings per MPPT | 3 / 2 |
| Maximum current per MPPT | 32 A (Isc 40 A) |
| Maximum PV voltage | 1100 V |
| MPPT range / start-up voltage | 160-980 V / 200 V |
| Maximum / European efficiency | 98,5% / 98,0% |
| Protection rating | IP66 |
| Cooling | Smart ventilation (below 58 dB) |
| Operating temperature | -30 / +60 °C (derating above 45 °C) |
| Night-time consumption | below 3 W |
| Protections | Type II SPD on DC and AC side, optional AFCI |
| Communication | USB, RS485, DRM; optional Pocket WiFi/LAN/4G dongle |
| Dimensions / weight | 482 x 417 x 181 mm / 28 kg |
45 kWp distributed across six strings
The recommended 45 kWp corresponds to approximately 100 450 Wp modules, distributed across 3 MPPTs with 2 strings each: six strings of 16-17 modules. Each tracker allows 32 A operating current and 40 A short-circuit current, so two strings in parallel with TOPCon modules rated at 14-15 A Isc remain within the limit but with reduced margin. The ideal configuration uses strings balanced by number of modules and orientation, with the three groups assigned to different exposures or inclinations: that is where the three trackers deliver extra energy.
Grid connection: what to check first
A 30 kW system is well above the 11,08 kW threshold of CEI 0-21 and requires an interface panel with SPI relay, external interface device and test report. At this power level, the most important preliminary check concerns the connection point: the available feed-in power in low voltage must be confirmed by the distributor before proceeding with the order. CEI 0-16, on the other hand, applies to systems connected in medium voltage, a condition that depends on the distributor’s requirements and the total power requested, not automatically on the inverter size.
Frequently asked questions
Does the X3-PRO-30K-G2 have 110% AC overload like the other sizes?
No. It is the only model in the series where the maximum apparent power matches the nominal power: 30 kVA, with a maximum output current of 45,5 A equal to the nominal current. The smaller sizes have a 110% margin, for example 27,5 kVA on the 25 kW. When sizing the system, the nominal power must be considered without relying on a higher peak.
How many panels are needed for a system with this inverter?
To operate close to nominal power, at least 30 kWp are needed, approximately 67 450 Wp modules. The recommended maximum is 45 kWp, about 100 modules on six strings. 150% oversizing makes sense on roof pitches with non-optimal orientation, where the theoretical peak power is never reached.
Is a 30 kW system connected in low or medium voltage?
It depends on the connection point and the distributor’s requirements, not only on the inverter size. Many systems of this power remain in low voltage and therefore fall under CEI 0-21, with interface panel, SPI and test report. Medium-voltage connection, regulated by CEI 0-16, involves a transformer cabin and different requirements: it must be clarified with the distributor during the connection request phase.
Is it better to choose one 30 kW inverter or two 15 kW inverters?
A single 30 kW inverter has higher efficiency (98,5% versus 98,3%), requires only one position, one interface panel and a single set of AC wiring. Two 15 kW units offer redundancy, four total MPPT trackers instead of three and a higher peak margin (33 kVA versus 30). The choice depends on how fragmented the roof is and how important production continuity is.
How noisy is it and where should it be installed?
Typical emissions remain below 58 dB, the highest value in the series because forced ventilation must dissipate the greater power. It is suitable for technical rooms, cabins, external walls of warehouses. The IP66 rating allows outdoor installation, but exposure to direct sunlight should be avoided to prevent derating, which starts above an ambient temperature of 45 °C.
