SodiumStorageSwitzerland

HEIWIT · SWISS IMPORTER

Sodium-ion storage for installations in Switzerland.

Heiwit 48 V batteries with no lithium or cobalt, and VIRGO and LYBRA hybrid inverters. Prices in CHF including Swiss VAT, delivery in Switzerland, bank transfer only after the order is confirmed.

Go to the catalogueThe technology
Heiwit HEIWIT-NA-48V210Ah sodium-ion battery
10 kWh
at 48 V per module, up to 30 kWh with three modules in parallel
6500+
cycles in the endurance test, 90% DoD and remaining capacity above 70%
−25 °C
minimum discharge temperature; charging starts at 0 °C
10 years
warranty or an energy throughput limit, whichever is reached first

THE SYSTEM

Battery, inverters and compatible accessories.

The HEIWIT-NA-48V210Ah battery works with the VIRGO (single-phase) and LYBRA (three-phase) hybrid inverters. Backup switchboards, meters and communication accessories complete the installation.

Heiwit sodium-ion battery 10 kWhSodium-ion batteries10 kWh · 48 V · 7.78 kWh NFPP from 2027See the models Heiwit VIRGO 3K-SVIRGO single-phase3 · 4.6 · 6 kWSee the models Heiwit LYBRA 6K-TLYBRA three-phase6 · 10 · 12 kWSee the models

No lithium, no cobalt.
Lower thermal risk, not zero risk.

Safety depends on the complete system: cells, BMS, inverter and a professional indoor installation.

SODIUM-ION TECHNOLOGY

Published data, with the test conditions.

The values refer to the HEIWIT-NA-48V210Ah battery and come from the Heiwit datasheet. Full datasheets, manuals and certificates are on the product pages.

Heiwit battery and inverter installed in a plant room
  1. 01

    Lower thermal risk

    Sodium-ion chemistry is thermally more stable than many lithium chemistries. In abuse tests (mechanical damage, short circuit) the cells did not go into thermal runaway. The risk is lower, not zero.

  2. 02

    No lithium or cobalt

    The cells use sodium, an abundant element. At end of life the battery must be returned to an authorised collection point.

  3. 03

    Operating temperatures

    Discharge from −25 °C to +60 °C, charge from 0 °C to +60 °C. Indoor installation only (IP20).

  4. 04

    Usable energy

    Recommended depth of discharge of 90%: of 10 kWh nominal capacity, 9 kWh are usable every day. Efficiency above 95%.

  5. 05

    Tested service life

    More than 6500 cycles in the laboratory endurance test, at 90% discharge with remaining capacity above 70%. This is a test result, not a guarantee.

  6. 06

    Warranty

    10 years or an energy throughput limit, whichever is reached first, under the Heiwit warranty conditions.

From early 2027: the HEIWIT-NA-48V170Ah 7.78 kWh battery with NFPP polyanionic cells, up to 6 in parallel. Expected cycle life of 9000 cycles at 95% DoD with 70% remaining capacity, based on cell qualification tests.

ORDERING AND DELIVERY

From the order to the installation.

How buying on SodiumStorage.ch works.

  1. 01

    Choose the components

    Prices in CHF including 8.1% Swiss VAT.

  2. 02

    Receive the pro forma invoice

    We check availability and delivery date, then send you the pro forma invoice with the bank details.

  3. 03

    Pay by bank transfer

    No online payment: you transfer the amount only after the order is confirmed.

  4. 04

    Have the system installed

    Installation must be carried out by a qualified professional. Grid connection must be agreed with the local network operator: the Italian CEI 0-21 certifications do not replace Swiss requirements.

Questions about your installation? Write to us: contact form

CATALOGUE

Prices in CHF, VAT included.

Full catalogue

FREQUENTLY ASKED QUESTIONS

Sodium-ion storage, briefly explained.

All questions

What is a sodium-ion battery?

A sodium-ion battery stores electricity on the same principle as a lithium-ion battery, but the charge is carried by sodium ions. Sodium can be obtained from common salt, for example, and is abundant worldwide. The Heiwit HEIWIT-NA-48V210Ah battery stores 10 kWh at 48 V and contains no lithium or cobalt. More in the guide Sodium or lithium?

How much does a sodium-ion battery cost at SodiumStorage.ch?

One HEIWIT-NA-48V210Ah module with 10 kWh costs CHF 3’896.– including 8.1% Swiss VAT, about CHF 390.– per kWh of nominal capacity or CHF 433.– per usable kWh (9 kWh at 90% depth of discharge). Three modules with 30 kWh cost CHF 11’688.–. A hybrid inverter (VIRGO from CHF 1’055.–, LYBRA from CHF 1’988.–), accessories, shipping and installation come on top. For comparison: according to Swissolar, an installed 15 kWh home battery cost about CHF 8’850.– on average in Switzerland in 2025.

How much storage do I need?

Swissolar recommends two rules of thumb and taking the smaller value: one thousandth of the annual PV production or one thousandth of the annual consumption, with at most about 1.5 kWh of usable capacity per kW of PV power. A house with a heat pump, 9,000 kWh consumption and 12 kWp of PV thus needs about 9 kWh: one 10 kWh module (9 kWh usable). Worked examples in the guide Battery sizing.

Are there subsidies for home batteries?

There is no federal subsidy for batteries in residential buildings; Pronovo's one-off remuneration covers the PV system, not the battery. Some cantons support storage, such as Schaffhausen and Thurgau since January 2026 with a one-off CHF 1’000.– for batteries of 10 kWh or more (at most a quarter of the investment), plus Neuchâtel. Municipalities pay grants too, for example the City of Zurich since August 2026: CHF 1’000.– plus CHF 100.– per kWh (with a PV system and energy management). All programmes by postcode are listed on energiefranken.ch.

GUIDES

What to know about your home battery.

Technology, sizing, regulations and costs of a home battery in Switzerland, with figures and sources.

TECHNOLOGYSodium-ion or lithium (LFP)? The comparison for home batteriesEnergy density, cold, safety, raw materials, lifetime and price: sodium-ion batteries and LFP home batteries compared, with sources.Read the guideSWITZERLAND · 2026Home batteries in Switzerland: installation, grid connection, subsidies and recyclingHome batteries in Switzerland in 2026: installation permit, the 3.7 kVA single-phase limit, fire protection, subsidies, new rules and recycling.Read the guidePLANNINGBattery sizing: how many kWh does my house need?Swissolar's two rules of thumb, worked examples for Swiss households with and without a heat pump, usable capacity and the choice of inverter.Read the guide