X3-IES-15K
The Solax X3-IES-15K is a 15 kW three-phase integrated energy storage system (ESS) — the most powerful model in the X3-IES series. It combines a hybrid inverter, BMS, and plug-and-play expandable LiFePO4 batteries up to 30 kWh. Featuring IP66 protection, 200% PV oversizing, micro-grid function, up to 10 units in parallel, and a 10-year warranty.
The Solax X3-IES-15K is the flagship model of the X3-IES series, a 15 kW three-phase integrated energy storage system (ESS). Like all IES systems, it integrates the three-phase hybrid inverter, BMS, and plug-and-play LiFePO4 battery modules into a single compact structure, offering a complete photovoltaic solution ideal for advanced residential installations and small commercial applications with high energy demand.
Solax X3-IES-15K Technical Specifications
| Nominal AC Power | 15 kW |
| Number of MPPT | 2 |
| Strings per MPPT | 2 / 1 |
| Maximum DC Voltage | 1000 V |
| Max DC Current per MPPT | 20 A |
| PV Input Oversizing | 200% |
| Max Battery Charge/Discharge Current | 50 A |
| Battery Technology | LiFePO4 (cobalt-free) |
| Compatible Battery Module | TP-HS50E (5.1 kWh/module) |
| Maximum Storage Capacity | 30.7 kWh (6 modules) |
| SPD Protection | Type II (DC and AC) |
| Protection Rating | IP66 |
| Parallel Inverters | Up to 10 units |
| Dimensions | 717 × 405 × 210 mm |
| Weight | 37 kg |
| Warranty | 10 years |
Frequently Asked Questions
Is the X3-IES-15K suitable for small commercial businesses?
Yes, the X3-IES-15K is suitable for small commercial businesses, craftsmen, and farms with a three-phase contract and high energy demand. With 15 kW of power and up to 30 kWh of storage, it covers a wide variety of use cases. Multiple units in parallel allow the system to be scaled for even greater needs.
What is the difference between the X3-IES-15K and the X3-ULT-15K?
The X3-IES-15K is an all-in-one system with integrated LiFePO4 batteries up to 30 kWh, designed for the residential and small commercial market. The X3-ULT-15K is a standalone hybrid inverter for C&I applications, with 3 MPPT, max DC current of 36 A, and the ability to manage HV storage up to 2.8 MWh via TB-PBOX. They are products with completely different architectures and targets.
Does the X3-IES-15K require an external BMS?
No, the BMS is integrated into the X3-IES system structure. Unlike the X3-Hybrid G4, which requires the TBMS-MCS0800 to manage external HV batteries, the X3-IES has its own internal battery management system, specific for the TP-HS50E modules of the IES series.
What does the micro-grid function of the X3-IES-15K support?
The micro-grid function allows the X3-IES to simulate the power grid and keep any connected string inverters operational even in the absence of the public grid. It powers household loads from the combination of PV production and battery discharge, ensuring operational continuity during blackouts.
Can the batteries of the X3-IES-15K be added later?
Yes, TP-HS50E battery modules can be added later in plug-and-play mode. You can start with 1-2 modules and scale up to 6 modules (30.7 kWh total) without modifications to the inverter or main wiring. This flexibility allows you to size the storage according to your available budget and increase it over time.
