The SolaX T-BAT-SYS-HV-S3.6 is a modular high-voltage LiFePO4 (LFP) battery system built from TP-HS3.6 modules, each adding roughly 3.3kWh of usable energy. Stack 2 to 13 modules on a single BMS to build a system from 7.3kWh to 47.9kWh nominal (6.5kWh to 43.1kWh usable at 90% depth of discharge), and extend it later as your energy needs grow.
It delivers 50A maximum charge and discharge current and uses built-in battery heating so it can charge and discharge from -30°C to 53°C. The cells are rated for over 6,000 cycles, the enclosure is IP65 for indoor or outdoor use, and soft-start protection shields the batteries and inverter from sudden surges.
Installation is quick: stackable modules, pre-wired communication cables and floor mounting make it a single-person install, with remote diagnosis and updates through the inverter. It is designed for SolaX hybrid inverters, including the X3 Ultra, which can run two independent battery ports for up to 26 modules.
6.5 to 43.1kWh
Usable (2 to 13 Modules)
50A
Max Charge / Discharge
6,000+
Cycle Life
IP65
Indoor / Outdoor
-30 to 53°C
With Built-In Heating
102 to 666V
Nominal Voltage Range
Capacity Explained
The 3.6 in the model name is a nominal label. Each module provides about 3.65kWh nominal and roughly 3.3kWh usable at 90% depth of discharge. SolaX quotes system capacity as 7.3kWh to 47.9kWh nominal and 6.5kWh to 43.1kWh usable, so check which figure any other listing is quoting.
Required Components
A BMS (TBMS-MCS0800) is required for every system, and it is a separate item from the battery modules. Systems of 10 or more modules must be built as two stacks joined with a Series Box. Depending on your inverter and module count you may need more than one BMS, so always check the SolaX datasheet and installation guide for exact quantities before ordering.
Important Safety Information
High-voltage battery systems must be installed and commissioned by a competent, qualified installer following the SolaX installation guide and BS 7671. Follow MCS requirements and notify the DNO under G98/G99 where applicable. Never mix different battery types or makes, and do not charge or discharge a damaged module.
Modular & Extendable
Build from 2 to 13 modules and extend the system during its lifetime, so you can start smaller and add capacity later.
Cold-Weather Performance
Unique battery heating technology allows charging and discharging from -30°C to 53°C, so it keeps working in frigid conditions.
Safe LFP Chemistry
Reliable LFP cells with soft-start protection against sudden surges and a cycle life of over 6,000 cycles.
IP65 Enclosure
IP65 protection is suitable for both indoor and outdoor installation. Refer to the user manual for the installation conditions.
Fast Single-Person Install
Stackable modules and pre-wired communication cables give plug-and-play setup, and the system stands on a floor stand.
Remote Diagnosis
Remote diagnosis and updates are handled via the inverter, saving site visits.
Modules
Nominal
Usable (90% DoD)
Nominal Voltage
Voltage Range
Max Power
Weight
2
7.3kWh
6.5kWh
102.4V
90 to 116V
5.1kW
77kg
3
11.0kWh
9.9kWh
153.6V
135 to 174V
7.6kW
110.5kg
4
14.7kWh
13.2kWh
204.8V
180 to 232V
10.2kW
144kg
5
18.4kWh
16.5kWh
256V
225 to 290V
12.8kW
177.5kg
6
22.1kWh
19.8kWh
307.2V
270 to 349V
15.3kW
211kg
7
25.8kWh
23.2kWh
358.4V
315 to 406V
17.9kW
244.5kg
8
29.4kWh
26.4kWh
409.6V
360 to 465V
20.4kW
278kg
9
33.1kWh
29.7kWh
460.8V
405 to 522V
23.0kW
311.5kg
10
36.8kWh
33.1kWh
512V
450 to 580V
25.6kW
353.8kg*
11
40.5kWh
36.4kWh
563.2V
495 to 636V
28.1kW
387.3kg*
12
44.2kWh
39.7kWh
614.4V
540 to 695V
30.7kW
420.8kg*
13
47.9kWh
43.1kWh
665.6V
585 to 750V
33.2kW
454.3kg*
About the Table
System weights include one BMS. Weights marked * also include the Series Box, which is required from 10 modules. Systems of 10 or more modules are built as two stacks.
Battery Module (TP-HS3.6)
Battery model
TP-HS3.6
Chemistry
Lithium iron phosphate (LFP)
Nominal energy per module
About 3.6kWh (labelled 3.6)
Nominal voltage per module
51.2V
Dimensions (L x W x H)
510 x 365 x 152mm
Weight
33.5kg
BMS (TBMS-MCS0800)
Model
TBMS-MCS0800
Dimensions (L x W x H)
510 x 365 x 157mm
Weight
10kg
Series Box
Dimensions (L x W x H)
510 x 365 x 152mm
Weight
8.8kg
Required from
10 modules (two stacks)
Electrical (all system sizes)
Recommended charge / discharge current
35A
Max. charge / discharge current
50A
Depth of discharge
90%
Communication interface
RS485, CAN
Environment & General
Installation
Floor stand, indoor or outdoor
Protection degree
IP65
Charge / discharge temperature (with built-in heating)
-30 to 53°C
Charge temperature (heating not active)
0 to 53°C
Discharge temperature (heating not active)
-20 to 53°C
Relative humidity
5 to 95% RH (non-condensing)
Max. operating altitude
Below 3,000m
Cycle life
Over 6,000 cycles
Certification
Standards
IEC 62619, IEC 60730, IEC 62040, CE, UN38.3
Compatible Inverter
Modules Supported
SolaX X1 Hybrid G4
2 to 8
SolaX X3 Hybrid G4
3 to 13
SolaX X3 Hybrid G4 Pro
3 to 26 (up to 13 per battery port)
SolaX X3 Ultra
3 to 26 (up to 13 per battery port)
Check Before You Order
Module limits differ between single-phase and three-phase setups beyond 8 modules. Confirm the exact configuration, BMS quantity and Series Box requirement for your inverter in the SolaX documentation.
What is the usable capacity of one module?
Roughly 3.3kWh usable per module at 90% depth of discharge, from about 3.65kWh nominal. The '3.6' in the model name is a nominal label. Total system usable capacity ranges from 6.5kWh with 2 modules to 43.1kWh with 13.
How many modules can I fit?
Between 2 and 13 modules per battery port. The X3 Hybrid G4 Pro and X3 Ultra have two battery ports, so they support up to 26 modules in total.
Do I need a BMS and a Series Box?
A BMS (TBMS-MCS0800) is required for every system. A Series Box is required from 10 modules, where the system is built as two stacks. Always confirm quantities for your inverter and module count.
Can it work in cold weather?
Yes. Built-in heating lets the battery charge and discharge from -30°C to 53°C. Without the heating function the charge range is 0 to 53°C and the discharge range is -20 to 53°C.
Can I install it outdoors?
It is rated IP65 for both indoor and outdoor use. Refer to the SolaX user manual for the required installation conditions, and mount it on the supplied floor stand.
Can I add more modules later?
Yes. The system is extendable during its lifetime. Add modules within the limit your inverter supports, and remember that going to 10 or more modules needs a Series Box.
Can I mix it with other SolaX batteries?
No. The SolaX installation guide warns not to mix different types or makes of battery module. Use TP-HS3.6 modules only within a T-BAT-SYS-HV-S3.6 system.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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