SolaX HS25 T-BAT-SYS-HV-S2.5 2.5kWh HV energy storage

SolaX T-BAT-SYS-LV D53 5.3 kWh LFP Heated Energy Storage System

The SolaX T-BAT-SYS-LV D53 is a low-voltage (51.2 V nominal), modular lithium iron phosphate (LFP) battery module that is part of the SolaX Triple Power product family. A single module provides a nominal capacity of 5.3 kWh and can be expanded in parallel up to 16 units, allowing the system’s total capacity to reach 85 kWh. Important: this is a battery unit, not an inverter—it requires a compatible SolaX hybrid inverter and the corresponding adapter box to operate.

SolaX T-BAT-SYS-LV D53 5.3 kWh LFP Heated Energy Storage System

The SolaX T-BAT-SYS-LV D53 is a low-voltage (51.2 V nominal), modular lithium iron phosphate (LFP) battery module that is part of the SolaX Triple Power product family. A single module provides a nominal capacity of 5.3 kWh and can be expanded in parallel up to 16 units, allowing the system’s total capacity to reach 85 kWh. Important: this is a battery unit, not an inverter—it requires a compatible SolaX hybrid inverter and the corresponding adapter box to operate.

What is it used for?

We primarily recommend it for residential and small commercial (light C&I) solar systems where self-consumption optimization, peak load reduction, or backup power is needed. A single module typically covers the evening consumption of an average household, while connecting multiple modules in parallel allows for managing heat pump systems, electric vehicle charging, or the energy balance of larger households. It also performs well in microgrid (off-grid and stand-alone) installations, mainly due to its modular scalability.

How does it work?

The battery connects to the DC side of the SolaX hybrid inverter via the adapter box and stores the excess energy generated during the day for later use. Its built-in BMS continuously synchronizes charge and discharge parameters with the inverter via CAN/RS485 communication, while AI-based control monitors the state of the cells in real time and refines the SOC estimate. In parallel connection, the so-called adaptive cut-off function significantly increases system reliability: if one module fails, the others continue to operate, and the entire storage system does not shut down.

Technical and System-Level Benefits

With a 90% DOD, 4.7 kWh of usable capacity, a 200 A peak discharge current (for 10 seconds), and a certified lifespan of 6,000+ cycles, it delivers stable, long-term operation—backed by a 10-year manufacturer’s warranty. The LFP chemistry is cobalt-free, making it more thermally stable and safer than NMC alternatives, while the IP65 rating provides flexibility in choosing an installation location. Available in both wall-mounted and floor-standing versions, it integrates well into tight mechanical rooms and garages. Thanks to OTA updates, the BMS firmware can be maintained remotely, eliminating the need for on-site visits for every update.

Differences within the SolaX portfolio

Compared to the classic Triple Power T-BAT HV (high-voltage) series, the D53 is a low-voltage platform, meaning it is designed for SolaX’s LV-compatible hybrid inverters (e.g., X1/X3 hybrid LV versions, X-ESS). If you are working with a high-voltage inverter, this is not the right module—you should choose the HV series instead. The advantage of the D53 over the HV series is its finer scalability: the system can be built in 5.3 kWh increments, allowing for more precise sizing in smaller projects.

Important to know

The battery only works with SolaX-compatible hybrid inverters and adapter boxes—it cannot be connected to inverters from other manufacturers. The nominal operating temperature is 0–53 °C during charging and –20–53 °C during discharging, so it is not ideal for long-term use in an unheated, damp basement. The warranty is valid for 10 years or until the specified energy transfer is reached, whichever comes first; it is advisable to clarify this with the end user in advance. Maximum installation altitude is 3,000 m.

SOLARKIT Reviews

We recommend this module to installers and end-users who already use a SolaX hybrid inverter or are currently planning to build an LV system and value modular scalability. It’s a typical good choice for single-family homes where the project starts with 1–2 modules, but the owner wants to leave the door open for expansion—e.g., for a future EV charger or heat pump. However, if you need a fixed, high capacity in one go (over 30 kWh), consider the HV alternative as well, since wiring and system losses are often more favorable there. Before installation, be sure to verify the compatibility of the inverter and the adapter box; the SOLARKIT team can assist you with this.