SolaX HS50E
A modular high-voltage LFP battery in 5.1 kWh modules, from 5.1 kWh to 30.7 kWh, rated IP66 and working from -30 to 53 °C.
- Best for modular storage
- Best for modular storage
- Installed battery
- 5.1 to 30.7 kWh
- Made by SolaX.
- Energy: 5.1 kWh per module, 5.1 to 30.7 kWh with one to six modules (102.4 to 614.4 V).
- A battery only: it works with SolaX single-phase and three-phase inverters; SolaX's page does not list the models.
- Max. 50 A charge and discharge current, more than 6,000 cycles, IP66 for indoor or outdoor use.
- Wall or floor mounting, AI-based state of charge and health estimates, and over-the-air updates.
Not tested by us
We have not tested the SolaX HS50E. The figures on this page come from the sources listed at the end of the page, checked on 13 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
5.1 kWh
Energy per module
30.7 kWh
Maximum with six modules
6,000+
Cycles
Specifications
Last checked on 13 November 2026. The grey text under each name explains what the value means. To see it next to other products, compare it in our comparison tool.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 5.1 kWh nominal per module: 5.1, 10.2, 15.3, 20.4, 25.6 and 30.7 kWh with one to six modules |
| Usable capacityThe part of the stored energy you can actually use. It is lower than the nominal capacity. | Not stated in the sources we read |
| Depth of dischargeHow much of the battery can be emptied without harming it. 90% means 10% is kept in reserve. | Not stated in the sources we read |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | Cobalt-free LFP (lithium iron phosphate), Li-ion |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | More than 6,000 cycles |
| ExpansionExtra battery units that add storage to the same system. | One to six modules per stack (30.7 kWh). SolaX's page also says the system can start at 5.12 kWh and expand to 92.16 kWh, without explaining how. |
| Power | |
| Charge and discharge powerHow fast the battery can take in and give out energy. It sets how many devices it can serve at once. | Maximum 50 A charge and discharge current. Standard power 3 kW with one module, 6.1 kW with two, 9.2 kW with three, 12.2 kW with four, 15.3 kW with five and 18.4 kW with six. |
| Round-trip efficiencyThe share of the energy you put in that comes back out. The rest is lost as heat. | Not stated in the sources we read |
| Nominal voltageThe voltage the battery is rated for. It decides which inverter or system voltage (12, 24 or 48 V) it fits. | 102.4 V with one module, 204.8, 307.2, 409.6, 512 and 614.4 V with two to six modules |
| Backup in a power cutWhether it can keep selected circuits running during a grid outage. | Depends on the inverter: the battery itself is not an inverter |
| Solar | |
| Solar inverterTurns the DC power from solar panels into AC for the home. Built in means no separate solar inverter is needed. | None: this is the battery only. It works with SolaX single-phase and three-phase inverters. |
| Solar and off-grid | |
| Works with solar panelsWhether you can charge it from solar panels. Yes means a built-in solar input or a compatible solar setup; read the detail for the voltage and power limits. | Yes: through the SolaX inverter it connects to; the battery has no solar input of its own. |
| Off-grid useWhether the maker describes it running with no grid connection at all, for example in a cabin, van or off-grid home. Backup only means it covers power cuts but needs the grid the rest of the time. | Partly: backup and off-grid operation depend on the connected inverter; SolaX does not describe a stand-alone off-grid system for this battery. |
| Connection and housing | |
| Grid connectionThe supply type it is built for. Check it matches your home's supply. | Not applicable: the battery connects to an inverter (high-voltage DC) |
| Dimensions (W × H × D)Width, height and depth of the unit, so you can check that it fits. | Module 730 × 318 × 150 mm; BMS unit 730 × 165 × 150 mm; one module with BMS 730 × 558 × 150 mm; six modules with BMS about 730 × 1,194 × 150 mm plus 730 × 1,127 × 150 mm |
| WeightMatters for lifting, wall mounting and moving it. | 47 kg per battery module; BMS unit 9.7 kg (one module with BMS is therefore about 56.7 kg, our sum) |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP66, for outdoor or indoor installation (see the user manual for installation conditions) |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | -30 to 53 °C, with advanced heating technology |
| Battery heatingA built-in heater that lets the battery charge in cold weather. | Yes: SolaX mentions heating technology for the -30 °C range, without giving levels |
| MountingWhere and how it can be fixed: on the floor, on a stand or on a wall. It decides the space and the wall strength you need. | Wall or floor mounting |
| ConnectivityHow you monitor and control it, usually through an app. | AI-driven state of charge and health monitoring with continuous over-the-air updates |
| CertificationsSafety and grid standards the maker says the product meets. | Not stated in the sources we read |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | SolaX's warranty terms list 10 years for T-BAT-SYS-HV-S50E and 5 years for T-BAT-SYS-HV-S50E-D, both from the earlier of first installation or 6 months after production. SolaX's HS50E page does not say which applies to a given unit. |
Compatible with
What SolaX says this product works with. Anything not listed here is not confirmed.
- Inverters
- SolaX single-phase and three-phase inverters. SolaX's page does not name the models: ask your installer which one pairs with the HS50E.
- Expansion
- One to six 5.1 kWh modules per stack.
- Mounting
- Wall or floor mounting, indoors or outdoors.
Rules where you live
An installed battery normally needs a qualified electrician, and in many countries you must also tell your grid operator, especially if it can export. Rules, incentives and tax treatment differ by country: see our country guides for what applies where you live.
Strengths and things to check
Strengths
- Stackable from 5.1 kWh to 30.7 kWh in small modules
- IP66 and -30 to 53 °C with heating technology
- More than 6,000 cycles
- Wall or floor mounting
- 50 A charge and discharge current
Worth checking before you buy
- A battery only: you need a compatible SolaX inverter as well
- SolaX's page gives no usable capacity, efficiency or certifications
- The warranty is 10 or 5 years depending on the model code
- Each 5.1 kWh module weighs 47 kg, plus a 9.7 kg BMS unit
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 13 November 2026
- Page published. Warranty at publication: 10 years (T-BAT-SYS-HV-S50E) or 5 years (S50E-D) according to SolaX's warranty terms (EU version 1.7, September 2026).
Where this information comes from
We have not tested the HS50E. Every figure above comes from SolaX's HS50E product page and its warranty terms, last checked on 13 November 2026. SolaX's datasheet sits behind a download form, so we did not read it; a value the page does not state is shown as not stated.
We do not show prices, because they depend on the installer's quote.
- Manufacturer SolaX HS50E product page
- Manufacturer SolaX warranty terms
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Common questions about SolaX HS50E
How much can the HS50E store?
Each module holds 5.1 kWh nominal. SolaX lists one to six modules, from 5.1 kWh to 30.7 kWh, with standard power from 3 kW to 18.4 kW.
Does the HS50E include an inverter?
No. It is a battery only and works with SolaX single-phase and three-phase inverters. SolaX's page does not list the models, so ask your installer.
Can the HS50E be used outdoors?
SolaX rates it IP66 for outdoor or indoor installation and lists -30 to 53 °C operation with heating technology. Check the user manual for installation conditions.
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