X3-ULT-30K
The Solax X3-ULT-30K is the 30 kW three-phase hybrid inverter from the X3-ULTRA series for C&I applications — the largest size in the range. 3 MPPT / 6 strings, 200% PV oversizing, 2 independent battery ports, micro-grid function, parallel operation up to 10 units (300 kW / 2.8 MWh). T58 and HS36 batteries, 10-year warranty.
The Solax X3-ULT-30K is the 30 kW three-phase hybrid inverter from the X3-ULTRA series — the largest size in the range — designed for the commercial and industrial (C&I) segment. With 30 kW nominal power, 3 MPPTs, 200% PV oversizing, and dual independent battery ports, it is the benchmark solution for C&I systems with high energy demand and maximum flexibility requirements.
Why choose the X3-ULT-30K for C&I?
With 3 MPPTs and 6 input strings and a maximum DC current of 36 A per MPPT, the X3-ULT-30K supports high-power photovoltaic arrays with the latest generation panels. The 200% PV oversizing means you can connect up to 60 kWp of panels, maximizing battery charging and production during peak hours. The system is AI-ready with production/consumption forecasting, VPP-ready via SolaX Cloud, and supports micro-grid mode to keep string inverters operational in the event of a blackout.
X3-ULT-30K Technical Specifications
| Nominal AC Power | 30 kW |
| Type | Three-phase hybrid inverter — X3-ULTRA series |
| Number of MPPTs | 3 MPPTs, 2 strings per MPPT (6 total inputs) |
| Max DC current per MPPT | 36 A |
| PV Oversizing | 200% PV input |
| Compatible batteries | Solax T58 (5.8 kWh) and T-BAT-SYS-HV-S3.6 (HS36, 3.6 kWh) |
| Battery ports | 2 independent ports |
| Inverter parallel operation | Up to 10 inverters in parallel (300 kW / 2.8 MWh) |
| Micro-grid function | Yes |
| EPS switching time | < 10 ms |
| Energy management | AI-ready, VPP, programmable ToU 7×24h |
| Protection rating | IP66 |
| Dimensions | 696 × 526 × 240 mm |
| Weight | 47 kg |
| Warranty | 10 years |
When to choose the X3-ULT-30K over the 25K?
The X3-ULT-30K is the right choice for C&I systems with a load power above 25 kW or with higher consumption peaks. With the same physical size and weight as the 25K, it delivers 20% more nominal power, while maintaining the same 200% PV oversizing and battery connection capabilities. It is the standard size for installations on industrial warehouses with 150–250 kWh/day and for multi-inverter applications requiring maximum total storage capacity.
What is included in the supply?
- Solax X3-ULT-30K three-phase hybrid inverter
- Connection cables and accessories
- Installation manual
Frequently Asked Questions
What is the maximum storage capacity with the X3-ULT-30K?
With a single X3-ULT-30K, you can connect T-BAT-SYS-HV-S3.6 (HS36) batteries expandable up to 13 modules per stack on the 2 independent ports. In a multi-inverter configuration with 10 units in parallel, the system reaches a total storage capacity of up to 2.8 MWh with an aggregated power of 300 kW.
Is the X3-ULT-30K compatible with T58 batteries?
Yes. The X3-ULT-30K is compatible with both Solax T58 (5.8 kWh, LiFePO4) battery modules and T-BAT-SYS-HV-S3.6 (HS36, 3.6 kWh) modules. The two independent battery ports allow you to connect different battery banks to each port, with autonomous management by the inverter.
Can I connect multiple X3-ULT-30Ks in parallel?
Yes. The X3-ULTRA series supports parallel connection of up to 10 inverters, reaching 300 kW of aggregated power and up to 2.8 MWh of total storage. This configuration is ideal for shopping centers, manufacturing industries, large logistics warehouses, and any commercial user with high energy demand.
What does ToU 7×24h mean in the context of the X3-ULT-30K?
The Time of Use (ToU) function of the X3-ULT-30K allows you to independently program the battery charge and discharge strategy hour by hour, for each day of the week (7 days × 24 hours). This allows you to charge the batteries during periods with lower electricity rates (e.g., at night) and discharge them during peak periods, reducing your energy bill regardless of instant PV production.
Does the X3-ULT-30K require an external EMS for energy management?
No, not necessarily. The X3-ULT-30K already includes advanced energy management functions (ToU, zero export, AI-ready). However, for systems with multiple inverters in parallel, with integration of multiple smart loads, or for centralized energy reporting, it is recommended to add the EMS PRO 1000 system for aggregated supervision of up to 120 inverters with a master-slave architecture.
