HEIWIT: CE-certified 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 certified and installable in Italy?

The answer, for the HEIWIT sodium-ion battery kit CE certified, is yes.
Our storage system has successfully passed all tests required for marketing on the Italian and European markets, as well as numerous additional voluntary certifications attesting to its safety, reliability and build quality.

Why certifications are crucial (also for the end customer)

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

• is safe for domestic and residential use
• does not create disturbances in the power grid
• is compatible with Italian connection regulations
• can be installed, insured and promoted without risk

Many imported economic systems do not have full or valid certification for Italy.
HEIWIT chose an opposite path: more tests, more controls, more transparency.

Compulsory certifications for sale and installation in Italy

✔ CEI 0-21 (Italy - grid connection)

The HEIWIT inverter + battery kit has been awarded the CEI 0-21:2022 + V1:2022 + V2:2024 certification,
essential for connection to the Italian low-voltage grid.

This certification attests that the system:

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

The certification covers the entire HEIWIT storage system (Virgo inverter + 48V sodium battery).

TÜV SÜD Certification - Document of Conformity CEI 0-21 

✔ 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, which certifies that

• 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, one of the most stringent references 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.

This provides a higher level of safety than many consumer batteries.

TÜV SÜD certification IEC 62040-1

Is it really advantageous to choose a certified HEIWIT battery?

Yes, because a heiwit CE-certified 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 certified storage system, tested and designed for the Italian market.

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