SolaX T-BAT-CHARGER: which batteries is it compatible with and how is it used on site?

A system that's been off for months. A module that the inverter can no longer reboot. An expansion where the new battery arrives with a different charge level than the ones already installed. These are the cases where a service charger is needed. The SolaX Power T-BAT-CHARGER, also known as the Triple Power Charge Box, connects to a single module, powers it from a standard 230V outlet, and brings it to the charge level set on the display, without going through the inverter. At the same time, it communicates with the BMS, so it also reads its status. Here we delve into three practical aspects: which batteries it works with according to SolaX, how it is connected and what you should know before using it on the construction site. What batteries does it work with? The official list is in the installation manual V2.0 and datasheet V1.1. The charger recognizes the battery by communicating with the BMS: compatibility is determined series by series, not by voltage. Three details are worth more than the rest of the table. Only the HV11550 uses port 485. It is the additional module of the T-BAT H 5.8 towers; all the other series communicate via CAN. The HV-5.0 and S25/36 series do not charge themselves. The module must be connected together with the base of the tower, which contains the BMS. Two modules are charged in series. The output voltage, however, remains between 40 and 150 V: for this reason the charger is never connected to a fully assembled tower. The batteries in our catalogue We compared the official list with the SolaX codes we deal with most often. The cards in the catalog: HV11550 · TP-HS36 · T-BAT H 5.8 V3 · HV11550 V3 · TB-HS51 · TP-HS50E · T-BAT LD53 Two out of seven batteries are therefore compatible according to the documentation consulted. For the other five, SolaX does not declare any incompatibility: it simply does not list them. The V3 versions, the HS51, and the IES modules were released after the last revision of the manual. We recommend not using the charger on these batteries without written confirmation from the manufacturer. Our technical office can request this directly from SolaX. Beware of similar names The T-BAT-SYS-HV-5.0 in the official list is the tower with TP-HS50 modules, not the TP-HS50E of the IES system. Likewise, a compatible T-BAT H 5.8 is a V1 or a V2: the V3 does not appear. Before taking the charger to the construction site, it is advisable to read the module's label, not just the commercial name. What's in the box The charger, with touch display, POWER switch, CAN and 485 ports, USB port for updates, AC input and BAT output. The power cable with five pairs of BAT+/BAT- terminals, one for each battery family, and eight clips to attach the unused pairs. Two short power cables: one for the T-BAT-5.8, i.e. T-BAT H 5.8 and HV11550, one for the T-BAT-6S modules. The communication cable to the BMS and the power cable to the socket. The five pairs of the power cable are assigned as follows: the first to the HV-5.0 series, the second to the R25/36, the third to HV-3.0 V1, T-BAT-5.8 V1 and V2 and T-BAT-6S, the fourth to HV-3.0 V2, the fifth to the S25/36. The connectors that remain free must always be closed in the clips: they are live and must be protected from short circuits, water and humidity. How to connect The display shows the state of charge, the target SOC percentage, and the charging current, both of which are adjustable. The yellow activation button starts charging, the white one stops it; the rotating green icon indicates that the module is charging. If the BMS does not respond: forced charging A deeply discharged battery may not be able to power its BMS, and therefore will not communicate with the charger. For these cases, there's the Forced Charging function, protected by a password that releases SolaX assistance. Set a duration between 5 and 15 minutes, 5 by default. Without communication with the battery, the current is fixed at 2 A: it is used to wake up the BMS, not to recharge the module. It automatically stops when the time expires, if the battery fails, or as soon as communication is established. From there, normal charging continues. It should not be used below 0°C or above 55°C, nor on a battery that is already at 100%. Nutrition and workplace Overcurrent protection is required upstream of the socket: SolaX recommends a 2P 16 A differential circuit breaker with an Idn of 30 mA. The maximum current draw is 10 A, with a cold-start inrush current of 60 A. Single-phase power supply 220-240 V, 50/60 Hz, on TN systems, overvoltage category II. IP20 protection rating: for indoor use, protected from direct sunlight, rain and humidity, away from flammable materials, salt and dust. Operating temperature between 0 and 50 °C, humidity between 20 and 90% non-condensing. During charging it should not be tilted or overturned, and should be left free on its sides, where the cooling vents are. Protective glasses and gloves during connection, as with any work on the modules. Update and maintenance The firmware can be updated from a USB 2.0 or later flash drive. The file is provided by SolaX support. During the update, do not turn off the charger or remove the flash drive. If it shuts down frequently due to overheating, it's almost always because the side vents are clogged: clean them with a dry cloth or brush. Keys, ports, and cables are checked every six months; a security check is scheduled every twelve months. When needed, in practice Battery in deep discharge. A system that has been turned off for a long time, or a module stored for months, that the inverter is no longer able to wake up. Extension of an existing system. Bring the new module to the same SOC as the ones already installed before inserting it into the tower: a uniform state of charge is among the advantages SolaX cites for the charger. Checking a suspicious form. Communication with the BMS allows you to monitor its status even when away from the system. It is not an accessory to be left on the system: it is a transportable service tool, equipped with a handle and weighing 7.1 kg. Do you need support? Our technical-sales office is available to verify the compatibility of a specific battery with you, ask SolaX for any missing confirmations, and prepare a quote. You can find us at +39 070 796 8010 Or you can write to us through the portal: we'll get back to you as soon as possible. Sources SolaX Power: T-BAT-CHARGER product page, T-BAT-CHARGER V1.1 datasheet, T-BAT-Charger V2.0 installation manual, SolaX Knowledge Base article "Introduction of battery charging box." Accessed October 2026; in case of discrepancies, the latest revision of the manual applies.