10 kWh Heiwit sodium-ion battery in a stackable configuration, with up to three modules per inverter

Sodium-ion battery 10kWh stackable

The Heiwit 10 kWh stackable battery is the stackable version of the 10 kWh, 48 V sodium-ion storage module. The cells contain neither lithium nor cobalt. It delivers 5 kW nominal and 6 kW peak. It discharges from −25 °C to +60 °C and charges from 0 °C to +60 °C, in indoor environments. Up to 3 modules can be connected in parallel, for 30 kWh, with Heiwit's Virgo and Lybra hybrid inverters. The warranty is 10 years.

Capacity: 10 kWh at 48 V (210 Ah). Charges and discharges at up to 5 kW, with a 6 kW peak.
Temperatures: discharges from −25 to +60 °C, charges from 0 to +60 °C. Indoor installation only, IP20 protection rating.
Duration: over 6,500 cycles for the 2025–2026 version. Efficiency over 95 per cent.
Compatibility: works only with Heiwit's Virgo and Lybra hybrid inverters. Up to 3 batteries in parallel, for 30 kWh.
Cells: sodium-ion, with no lithium or cobalt.
Warranty: 10 years, with support in Italy.

SKU: NA-48210-STACK Category: Accumulation Tags: sodium ions, halls Brand: HEIWIT

Description
Technical specifications
FAQ
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HEIWIT sodium ion battery: the solution for renewable energy storage

Welcome to the future of energy storage with HEIWIT sodium ion batteries.
HEIWIT aims to revolutionise the renewable energy landscape by introducing sustainable technologies through innovative solutions based on sodium ion batteries.

Efficient and reliable energy storage

HEIWIT sodium-ion batteries are designed to deliver efficient and reliable energy storage. Harnessing the power of sodium ions, these batteries represent a sustainable alternative to traditional lithium-ion batteries. They are ideal for storing electricity from renewable sources such as solar and wind.

Key advantages of HEIWIT sodium ion batteries

Raw materials: sodium is an abundant element. The cost of storage should be compared per kWh cycled, not on the purchase price alone.
Long life: over 6,500 cycles for the 2025-2026 version, with layered oxide cells.
Security and sustainabilitySodium ion batteries are environmentally friendly and present fewer risks during production and disposal.

Multifunctional application

HEIWIT sodium ion batteries are versatile and suitable for a wide range of applications, including residential energy storage, commercial facilities and grid-scale projects. They offer scalability and flexibility to meet customers' changing energy needs.

Choose HEIWIT for sustainable energy solutions

Join the renewable energy revolution with HEIWIT sodium ion batteries. Discover the reliability, efficiency and sustainability of our innovative energy storage solutions. Contact us today to learn more about how HEIWIT is using sodium ion technology to create a better future.

Batteria Heiwit 10 kWh stackable: technical specifications

Nameplate data, Batteria Heiwit 10 kWh stackable
Type	Sodium-ion storage module for photovoltaic systems
Module capacity	10 kWh
Rated voltage	48 V
Minimum capacity	210 Ah
Maximum charging and discharging power	5 kW
Rated output power	5 kW
Peak output power	6 kW
Maximum charging voltage	60 V
Maximum charging current	100 A
Maximum discharge current	100 A
Recommended discharge depth	90 per cent
Energy efficiency	over 95 per cent
Life cycles	over 6,500 (layered oxide cells, 2025–2026 version)
Cell technology	Sodium-ion with layered oxide cathode, with no lithium or cobalt
BMS	Integrated, connected to the app via the inverter
Communication	CAN bus, RS485
Display	Colour LED touchscreen with charge status indicator
Scalability	Up to 3 units in parallel (30 kWh)
Discharge temperature	from −25 °C to +60 °C
Charging temperature	from 0 °C to +60 °C
Storage temperature	from −40 °C to +70 °C
Relative humidity	from 0 to 100 per cent
Installation	Indoors only
Degree of protection	IP20
Noise emissions	Imperceptible
Certifications	IEC 60730-1:2013+A1+A2 Annex H; IEC 62040-1:2017+A1+A2; IEC 61000-6-1:2019; IEC 61000-6-3:2021; CEI 0-21:2022 with variants V1:2022 and V2:2024. CEI 0-21 certification issued by TÜV SÜD on the basis of type tests on the Virgo inverter + 48210 battery system (document no. D 132944 0003). CEI 0-21 certification issued by TÜV Rheinland on the Lybra inverter + HEIWIT-NA-48V210Ah battery system (certificate no. A3 50741827 0001). CE marking
Warranty	10 years, support in Italy

Download the datasheet (PDF)

Data declared by the manufacturer in the datasheet; the actual parameters are those of the product as delivered.

Batteria Heiwit 10 kWh stackable: frequently asked questions

What’s different from the standard form?

The stackable version can be stacked: the units are mounted on top of one another rather than side by side, whilst maintaining the same capacity (10 kWh), voltage (48 V), power output and cell chemistry. It is designed for installations where floor space is limited.

How many charge cycles does the Heiwit sodium-ion battery last for?

The estimated lifespan is over 6,500 cycles for the 2025–2026 version, which features layered oxide cells. The 2027 version, with a NFPP polyanionic cathode, achieves 9,000 cycles. As at 17 September 2026, the installed fleet of Heiwit batteries had accumulated a total of 31,972 cycles. The warranty is valid for 10 years.

Which inverters is it compatible with?

With Heiwit's hybrid inverters: single-phase Virgo (3K-S, 4K6-S, 6K-S) and three-phase Lybra (6K-T, 10K-T, 12K-T). Inverters from other brands do not support the voltage range of sodium batteries. On an existing system, the Heiwit inverter is connected on the AC line and the solar PV inverter stays in place. Up to 3 batteries can be connected in parallel, for 30 kWh of storage.

Where is it installed?

For indoor use only: the protection rating is IP20. The battery discharges at temperatures ranging from −25 °C to +60 °C and charges at temperatures ranging from 0 °C to +60 °C. The module measures 465 × 268 × 918 mm and weighs less than 116 kg.

Does it contain lithium, cobalt or nickel?

The current battery contains neither lithium nor cobalt: the charge carrier is sodium. The 2027 version, with an NFPP polyanionic cathode, does not contain nickel either.

Is it certified?

Yes. The battery carries the CE marking and complies with IEC 60730-1 Annex H, IEC 62040-1, IEC 61000-6-1 and IEC 61000-6-3. The system comprising the Virgo inverter and battery holds CEI 0-21:2022 certification issued by TÜV SÜD on the basis of type tests (document no. D 132944 0003). The system comprising the Lybra inverter and battery also holds CEI 0-21 certification, issued by TÜV Rheinland (certificate no. A3 50741827 0001).