X3 FORTH 100K
The Solax X3 Forth 100K is a 100 kW three-phase photovoltaic inverter designed for large-scale commercial and industrial installations. With 9 independent MPPTs, a maximum DC voltage of 1100 V, IP66 protection, and a zero grid feed-in control function, it ensures maximum energy yield and reliability even in harsh environments.
The Solax X3 Forth 100K is the ideal three-phase string inverter for commercial and industrial photovoltaic systems of 100 kW. Designed for high-power professional installations, it combines advanced multi-MPPT architecture with smart remote monitoring and management features, making it the reference solution for installers and energy managers working on medium and large-scale systems.
Why choose the Solax X3 Forth for industrial systems?
The X3 Forth series has been specifically designed to tackle the challenges of commercial photovoltaic systems: PV fields with many strings, the need for generator oversizing, and export control requirements imposed by the local distributor. With 9 MPPTs and 2 strings per tracker, the X3 Forth 100K independently manages up to 18 photovoltaic strings, minimizing losses from mismatch and partial shading. Oversizing the PV input up to 150% allows you to install more panels than the inverter's nominal power, maximizing production during peak hours.
Solax X3 Forth 100K Technical Specifications
| Nominal AC Power | 100 kW |
| Number of MPPTs | 9 |
| Strings per MPPT | 2 |
| Maximum DC Voltage | 1100 V |
| MPPT Voltage Range | 180–1000 V DC |
| Max Short-Circuit Current per MPPT | 46 A |
| PV Input Oversizing | 150% |
| Maximum Efficiency | 99.9% |
| Protection Rating | IP66 |
| SPD Protection | Type II (DC and AC) |
| AFCI Protection | Optional |
| Cooling | Smart ventilation |
| Fuse Design | Fuseless (integrated string current monitoring) |
| Dimensions | 985 × 660 × 327.5 mm |
| Weight | 83 kg |
| Warranty | 5 years (6 years with active cloud connection) |
Smart features and remote control
The X3 Forth 100K natively integrates 24/7 operational monitoring via the Solax cloud platform, with the possibility of remote firmware updates and parameter changes. The intelligent I-V curve diagnosis allows you to detect anomalies on the photovoltaic strings without the need for on-site intervention. The nighttime reactive power compensation function ensures compliance with local distributor requirements even during hours without solar irradiation.
Zero export control and regulatory compliance
The integrated power export to grid control (zero export) is a key feature for systems subject to constraints imposed by the grid operator. The Solax X3 Forth 100K natively supports this mode, with an interface for external measurement meters and compatibility with the technical connection requirements set by CEI 0-16 and CEI 0-21 standards for production plants connected to MV/LV grids.
What is included in the supply?
- Solax X3 Forth 100K inverter
- Integrated SPD Type II protection (DC and AC)
- AC connector for aluminum cable (available)
- Technical documentation and certifications
Frequently Asked Questions
Is the Solax X3 Forth 100K compliant with CEI 0-16 for MV connection?
Yes, the Solax X3 Forth 100K is designed to meet the technical connection requirements of the CEI 0-16 standard (medium voltage connected systems) and CEI 0-21 (low voltage). It supports reactive power compensation, export control, and the interface protection functions required by Italian distributors.
What does 150% PV input oversizing mean?
150% oversizing means you can connect a photovoltaic generator up to 150 kWp to an inverter with a nominal power of 100 kW. This practice is common in commercial systems because it allows increased production during low irradiance hours without increasing inverter costs, accepting limited clipping during absolute peak hours.
How many photovoltaic strings can be connected to the X3 Forth 100K?
The Solax X3 Forth 100K has 9 MPPTs with 2 inputs (strings) for each tracker, for a total of 18 independent string inputs. Each MPPT manages its own strings autonomously, minimizing mismatch losses in case of differences in orientation, tilt, or partial shading between the strings.
Does the X3 Forth 100K operate without DC fuses?
Yes, the design is fuseless: the inverter integrates an intelligent string current monitoring system that detects anomalies (overcurrents, faults) without the use of physical fuses. This reduces maintenance costs and the possibility of failures related to the fuses themselves. SPD Type II protection on DC and AC is still integrated as standard.
What is the warranty for the Solax X3 Forth 100K purchased from MR WATT?
The standard warranty is 5 years. By activating the cloud connection via the Solax portal and keeping the datalogger connected, the warranty is extended free of charge to 6 years (5 years standard + 1 additional year on spare parts). MR WATT provides pre- and post-sales technical support for system configuration and management.
