SolaX Triple Power T58
A stackable high-voltage LFP battery in 5.8 kWh modules, expandable to 34.6 kWh, with a 10-year warranty.
- Best for stackable storage
- Installed battery
- 5.8-34.6 kWh
- 10-year warranty
- Energy: 5.8 kWh per module, 5.5 kWh usable at 95% depth of discharge, up to 34.6 kWh with six modules.
- A battery only: it needs a compatible SolaX hybrid inverter, and SolaX's page does not list which.
- Rated for more than 6,000 cycles at 95% depth of discharge, IP66, wall or floor mounting.
- Optional two-level battery heating for cold conditions.
Not tested by us
We have not tested the SolaX Triple Power T58. The figures on this page come from the sources listed at the end of the page, checked on 10 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
5.8 kWh
Energy per module
34.6 kWh
Maximum with 6 modules
6,000+
Cycles at 95% depth of discharge
Specifications
Last checked on 10 November 2026. The grey text under each name explains what the value means.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 5.8 kWh per module (nominal), from 5.8 kWh with one module to 34.6 kWh with six |
| Usable capacityThe part of the stored energy you can actually use. It is lower than the nominal capacity. | 5.5 kWh per module at 95% depth of discharge (32.9 kWh with six) |
| Depth of dischargeHow much of the battery can be emptied without harming it. 90% means 10% is kept in reserve. | 95% |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | LFP |
| 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 at 95% depth of discharge (25 ± 2 °C, 0.5C, to 70% of original capacity) |
| ExpansionExtra battery units that add storage to the same system. | Up to six modules (34.6 kWh) per cluster, and up to twelve modules (69.1 kWh) on inverters with two battery ports. The datasheet's battery table says 1 to 5 modules, so confirm the limit with SolaX. |
| 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. | Rated 2.9 kW with one module and 17.3 kW with six; maximum 4 kW with one module and 24.2 kW with six. Maximum current 35 A (25 A recommended). |
| 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 |
| 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 needs a compatible SolaX hybrid inverter. |
| 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 (115.2 V per module, up to 691.2 V with six, high-voltage DC) |
| Dimensions (W × H × D)Width, height and depth of the unit, so you can check that it fits. | 474 × 715 × 150 mm per module |
| WeightMatters for lifting, wall mounting and moving it. | 61.5 kg per module |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP66, for indoor or outdoor installation |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | Charging 0 to 55 °C, or -30 to 55 °C with heating on; discharging -20 to 55 °C, or -30 to 55 °C with heating on |
| Battery heatingA built-in heater that lets the battery charge in cold weather. | Optional, two levels |
| ConnectivityHow you monitor and control it, usually through an app. | CAN 2.0 and RS485 to the inverter |
| CertificationsSafety and grid standards the maker says the product meets. | Includes IEC 62619, IEC 63056 and VDE 2510 |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 10 years |
Compatible with
What SolaX says this product works with. Anything not listed here is not confirmed.
- Expansion
- Up to six T58 modules per cluster (34.6 kWh), or up to twelve (69.1 kWh) on inverters with two battery ports.
- Inverters
- SolaX's page does not list the compatible inverter models. Ask your installer which SolaX hybrid inverter pairs with the T58.
- 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 5.8 kWh to 34.6 kWh
- 95% depth of discharge and 6,000+ cycles
- IP66, with wall or floor mounting
- Optional battery heating for cold sites
- 10-year warranty
Worth checking before you buy
- A battery only: you need a compatible SolaX inverter as well
- The datasheet does not state a round-trip efficiency
- The datasheet is not consistent about the module limit (5 or 6)
- Each module weighs 61.5 kg
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 10 November 2026
- Page published. Warranty at publication: 10 years (SolaX T58 V3 datasheet). The older T-BAT H 5.8 V2 module is a different, IP65 version and is not covered.
Where this information comes from
We have not tested the T58. Every figure above comes from SolaX's T-BAT H V3 datasheet and its UK product page, last checked on 10 November 2026. The T58 is sold in V2 and V3 versions, and this page covers the V3. A value that the datasheet does not state is shown as not stated.
We do not show prices, because they depend on the installer's quote.
- Manufacturer SolaX T-BAT H 5.8 V3 datasheet
- Manufacturer SolaX UK T-BAT H 5.8 V3 page
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Common questions about SolaX Triple Power T58
How much can the T58 store?
Each module holds 5.8 kWh, of which 5.5 kWh is usable at 95% depth of discharge. SolaX lists up to six modules per cluster, 34.6 kWh, and up to twelve on inverters with two battery ports.
Does the T58 include an inverter?
No. It is a battery only and needs a compatible SolaX hybrid inverter. SolaX's page does not list which inverter models pair with it, so ask your installer.
Can the T58 be used outdoors?
SolaX rates the T58 V3 at IP66 for indoor or outdoor installation, with wall or floor mounting. Check the installation guidance before choosing a spot.
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