10 kWh Heiwit sodium-ion battery, 48 V 210 Ah module for photovoltaic systems

Sodium-ion battery 10kWh

The Heiwit NA-48V210Ah battery is a 10 kWh sodium-ion storage module at 48 V. 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, indoors. 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. The recommended retail price is €4,900 including VAT.

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: HEIWIT-NA-48V210Ah Category: Accumulation Tags: sodium ions, halls Brand: HEIWIT

Description
Technical specifications
FAQ

HEIWIT sodium ion battery: the solution for renewable energy storage

Welcome to the future of energy storage with HEIWIT sodium ion batteries.
HEIWIT is revolutionising the renewable energy landscape with innovative technologies,
sustainable and completely lithium-free.

Efficient and reliable energy storage

HEIWIT sodium ion batteries provide stable, safe and limitless energy storage
of traditional systems. Sodium, an abundant and readily available element, enables performance
constant even at low temperatures, making this technology ideal for modern photovoltaics.

Key advantages of HEIWIT sodium-ion batteries

Raw materials: sodium is far more abundant than lithium. The cost of the cells depends less on critical raw materials.
Long life: over 6,500 cycles for the 2025–2026 version. In the 6,500-cycle test, the remaining capacity stayed above 70 per cent.
Thermal stability: reduced, but not zero, thermal risk. The cells contain no lithium or cobalt. Suitable for indoor residential and professional installations.
Sustainabilityrecyclable materials and a much smaller environmental footprint than lithium-ion batteries.

Applications

HEIWIT sodium ion batteries are ideal for:

residential installations,
commercial activities,
industrial applications,
micro-grid and off-grid systems.

Batteria Heiwit NA-48V210Ah: technical specifications

Nameplate data, Batteria Heiwit NA-48V210Ah
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
Dimensions (W × D × H)	465 × 268 × 918 mm
Weight	less than 116 kg
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 NA-48V210Ah: frequently asked questions

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).

How much does the 10 kWh Heiwit battery cost?

The recommended retail price is €4,900 VAT included. For installation on an existing system the recommended price is €500, and for the 6 kW hybrid inverter with meter €1,259, again VAT included. The final quotation is prepared by an installer in the Heiwit network for each individual system.

Technical documentation

Data sheets and manuals available to download without registration, for installers and designers.

Datasheet battery (PDF) — electrical and mechanical specifications
HEIWIT-NA 48V 210Ah Installation and User Manual (PDF)
Sodium-ion battery brochure (PDF)

A comparison with other storage technologies can be found in the product range page. You’ll need an installer to get a quote: you can look for a partner or Request information.