Heiwit proudly announces the commissioning of its first 10 kWh sodium-ion battery, installed at the experimental facility at the Caronno Pertusella (VA). Connected to a 6 kW proprietary hybrid inverter, the battery is now fully operational, capable of handling the storage and distribution of locally produced energy from renewable sources.

This is a strategic step for our company, which thus consolidates its position in the panorama of next-generation energy storage technologies. After years of research and development, our solution is now available for order, with first deliveries planned from September 2025.

A project born from research and industrial vision

The Heiwit sodium ion battery is the result of intensive development work carried out by our technical team, in collaboration with universities, research centres and national industrial partners. The project stems from a concrete need: to offer a alternative and sustainable solution to conventional lithium batteries, whose environmental impact and cost have raised increasing global concerns.

Thanks to the use of abundant, low-impact materials such as sodium and the elimination of critical elements such as lithium, cobalt and nickel, Heiwit technology enables the combination of environmental sustainability, operational reliability e affordability, with a supply chain that can gradually take root in Italy and Europe.

The Caronno Pertusella installation: a test bench under real conditions

The pilot plant activated at the Caronno Pertusella site aims to validate the performance of the battery and associated inverter under real conditions. The tests underway are confirming the results obtained in the laboratory, highlighting technical performance that has already attracted the interest of numerous photovoltaic operators and installers.

During the first weeks of testing, several industry professionals visited the plant to closely evaluate the behaviour of our battery in real operating situations. The first impressions gathered were extremely positive, in particular for two key aspects that significantly differentiate Heiwit technology:

1. Thermal stability and operational reliability

Heiwit sodium ion battery cells operate stably at an internal temperature of approx. 27-28°C, even during intense charge and discharge cycles. This represents a significant advantage over lithium batteries, which can reach internal operating temperatures of 65-75°C or higher, especially in high load conditions or poorly ventilated environments.

A lower operating temperature results in lower thermal stresses on materials, greater durability, and above all a drastic reduction in the risk of overheating and fire, problems well known in the electrochemical storage sector.

This characteristic makes our coil particularly reliable even in installations subject to climatic variations or in environments where active temperature control is not always guaranteed, such as industrial warehouses, technical rooms or non-air-conditioned residential contexts.

2. Charging speed

Thanks to cell optimisation and advanced energy flow management, the Heiwit battery is able to reach the’100% charge in less than two hours in standard configuration, with the possibility of even faster times depending on the operating conditions and configuration of the inverter.

Main technical features

A concrete alternative to lithium

The increasing scarcity of rare materials, the environmental risks associated with lithium mining and concerns about the safety of some lithium models have prompted the market to look for more sustainable and safer solutions.

Our sodium ion battery:

• Reduced risk of fire or explosion linked to thermal runaway;

• It does not use materials with strong geopolitical implications;

• It can be recycled more easily at the end of its life;

• It offers a lower overall cost compared to lithium solutions of the same capacity.

Commercial availability

The 10 kWh Heiwit battery is available from today, with first deliveries scheduled for September 2025. Our sales team is already active to support installers, EPCs and distributors in evaluating and configuring the most suitable solution for their needs.

For the first few months, priority will be given to orders from our premium installers, with the aim of rapidly consolidating a network of installers formats and certificates, which can guarantee widespread distribution and proximity technical support.

Visits by appointment

For those who wish to see the battery in operation, a visit can be booked at the Caronno Pertusella site. During the meeting it will be possible:

• Verify live system performance in charging/discharging;

• Deepening the technical aspects and actual monitoring data;

• Talk directly with our engineers;

• Evaluate integration solutions on existing or new installations.

Conclusions

The commissioning of the Heiwit sodium ion battery in Caronno Pertusella represents a crucial moment for the company, but above all for the national energy sector. It is a concrete demonstration that there are alternatives to lithium already available today, which can guarantee high performance, greater sustainability and better control of the production chain.

We are ready to share our achievements with all those who believe in a more affordable, secure and environmentally friendly energy future.

For technical information, orders or bookings visit:
? www.heiwit.com

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