HEIWIT: CE-marked sodium-ion battery for Italy and Europe

HEIWIT: CE-marked sodium-ion battery for Italy and Europe

When it comes to storage systems for photovoltaics, one of the most important questions is:
is this battery really compliant and can it be installed in Italy?

The answer, for the CE-marked HEIWIT sodium-ion battery kit, is yes.
The energy storage system carries the CE marking. The Virgo inverter plus battery kit holds CEI 0-21 certification issued by TÜV SÜD on the basis of type tests. To this are added further TÜV SÜD tests on safety and reliability.

Why certifications are crucial (also for the end customer)

Certifications are not just a bureaucratic fulfilment.
They are the guarantee that a battery:

• meets the safety requirements for domestic and residential use
• does not create disturbances in the power grid
• is compatible with Italian connection regulations
• has the documentation required for installation, insurance and incentives

Before buying, it is always worth checking that the system has complete certifications that are valid for Italy.
HEIWIT has chosen this path: more tests, more controls, more transparency.

Mandatory requirements for sale and installation in Italy

✔ CEI 0-21 (Italy - grid connection)

The HEIWIT inverter + battery kit holds the CEI 0-21:2022 + V1:2022 + V2:2024 certification issued by TÜV SÜD on the basis of type tests. The document is no. D 132944 0003.
The CEI 0-21 standard governs connection to the Italian low-voltage electricity grid.

The tests verified that the system:

• meets network interface requirements
• handles protections and disconnections correctly
• is compatible with residential photovoltaic systems

The certification covers the entire HEIWIT energy storage system (Virgo inverter + 48V sodium battery). The Lybra inverter plus battery system also holds CEI 0-21 certification, issued by TÜV Rheinland.

TÜV SÜD conformity document no. D 132944 0003 – CEI 0-21, Virgo inverter (PDF)

TÜV Rheinland certificate no. A3 50741827 0001 – CEI 0-21, Lybra inverter (PDF)

✔ Low Voltage Directive (LVD 2014/35/EU)

Both the inverter and the HEIWIT battery have been tested according to the Low Voltage Directive,
which guarantees the electrical safety of the product within the prescribed voltage limits.

• Protection against electrical shocks
• Insulation and safety of components
• Compliance with applicable EN standards

Tests carried out according to EN 62109-1 / EN 62109-2 for the inverter and EN IEC 62040-1 for the battery.

TÜV SÜD LVD inverter and battery certificates

✔ Electromagnetic Compatibility (EMC 2014/30/EU)

The HEIWIT system also complies with the EMC Directive. In practice, the system:

• does not generate electromagnetic interference
• is not disturbed by other devices

This is essential in residential environments, where many electronic devices coexist.

TÜV SÜD EMC inverter and battery certificates

Extra certifications and voluntary testing: the real HEIWIT added value

✔ PPP 51096A - battery system safety

The HEIWIT sodium-ion battery has been tested according to the
PPP 51096A:2023, a TÜV SÜD test protocol for storage systems.

These tests verify:

• electrical stability of the battery pack
• behaviour in abnormal conditions
• reliability of the BMS

TÜV SÜD certification - PPP 51096A

✔ IEC / EN IEC 62040-1 - industrial standard

The HEIWIT battery system is certified according to standards IEC 62040-1 (and subsequent revisions), also typically required in the industrial and UPS sector.

It is a safety standard developed for uninterruptible power systems (UPS).

TÜV SÜD certification IEC 62040-1

Is it really worth choosing a standards-compliant HEIWIT battery?

Yes, because a CE-marked HEIWIT sodium-ion battery offers:

• installation without regulatory problems
• real compatibility with the Italian network
• greater security over time
• higher insurance and property values
• technical support and comprehensive documentation

Sodium ion technology also adds inherent advantages:

• absence of lithium and cobalt
• greater thermal stability
• excellent performance even at low temperatures

Conclusion

HEIWIT does not just sell a battery.
He built a compliant energy storage system, tested and designed for the Italian market.

If you are looking for a reliable, compliant and future-ready solution,
the CE-marked HEIWIT sodium-ion battery is a solid, transparent and well-documented choice.

The CE marking covers the products in the Heiwit sodium-ion range, inverters included.