Batteria HEIWIT al sodio: 9.000 cicli a DoD 95% per l’accumulo

by Technical Department Heiwit | Aug 17, 2026 | Insights, Sodium ion batteries, New green technologies

Negli ultimi mesi ti abbiamo raccontato come sta cambiando il mondo dell’accumulo: i limiti delle chimiche tradizionali, la corsa ai materiali critici, la ricerca di soluzioni più sicure e durature. L’ultimo articolo si chiudeva con una domanda: “e...

Energy density versus lifespan: which really matters in stationary storage

by Technical Department Heiwit | 16 Aug 2026 | Sodium ion batteries, Studies and research

Nel confronto fra tecnologie di accumulo c’è un numero che viene citato più di ogni altro: la densità energetica, i watt-ora per chilogrammo. È il parametro che ha guidato vent’anni di sviluppo delle batterie, per una ragione semplice: le batterie si sono...

NFPP sodium-ion cells at low temperatures: 95% capacity at −20 °C in qualification tests

by Technical Department Heiwit | 16 Aug 2026 | Sodium ion batteries, Studies and research

C’è un difetto delle batterie domestiche di cui i cataloghi parlano poco: al freddo rendono meno. Non è un dettaglio marginale, perché il momento in cui rendono meno coincide con il momento in cui servono di più. A gennaio il fotovoltaico produce una frazione di...

Sodium-ion cell safety: what the evidence really says

by Technical Department Heiwit | 16 Aug 2026 | Sodium ion batteries, Studies and research

“È sicura?” è la prima domanda che ci fanno, e ha ragione chi la pone. Una batteria non è un serbatoio: è un sistema elettrochimico che immagazzina energia in forma chimica e che, sollecitato oltre i propri limiti, può liberarla tutta insieme. La risposta...

Industrial BESS: duration and safety before density

by Technical Department Heiwit | 13 Aug 2026 | Insights, Sodium ion batteries, New green technologies

Imagine an industrial plant that charges and discharges the same battery twice a day for fifteen years. That is thousands of cycles, one after the other, day and night. In such a scenario, the right question is not “how much energy goes into a metre...

High-current batteries: how they handle real-world stress

by Technical Department Heiwit | 9 Aug 2026 | Insights, Sodium ion batteries, New green technologies

Imagine a winter morning in Northern Italy. The system is covered in frost, the temperature is below zero and you need to charge the storage system quickly to make the most of the first few hours of sun. It is precisely in moments like this that you realise whether a battery is...

Battery safety: what happens when they heat up

by Technical Department Heiwit | 5 August 2026 | Insights, Sodium ion batteries, New green technologies

Imagine a BESS container installed in an industrial area, next to a warehouse where dozens of people work every day. Inside, there are hundreds of cells storing energy. Under normal conditions, everything runs smoothly. But what happens if a cell...

From potential to operational plan: how to solarise public buildings

by Technical Department Heiwit | 4 Aug 2026 | Studies and research

The decisive step is not estimating how many panels can fit on roofs, but transforming thousands of surfaces into an orderly pipeline of financeable, permittable and constructible projects. 2027 EPBD threshold for public buildings >2,000 m² 2028 threshold >750 m² 2030 threshold >250...

Can the public administration become self-sufficient? Energy, self-consumption and emissions

by Technical Department Heiwit | 4 Aug 2026 | Studies and research

Producing in a year an amount of energy similar to the annual consumption of a perimeter does not mean making it self-sufficient. To transform the potential of public roofs into truly used energy, hourly profiles, the grid, contracts, storage and rules of...

5.68 GW and 7.53 TWh on public administration roofs: results and significance

by Technical Department Heiwit | 4 Aug 2026 | Studies and research

The Heiwit model yields 5.68 GWp of theoretical capacity and 7.53 TWh of annual generation. These are large-scale results, but they have not yet been independently replicated. This page presents them with correct equivalences and necessary caveats. 5.68 GWptheoretical power...

How much does it cost to solarise public roofs? CAPEX, LCOE and economic variables

by Technical Department Heiwit | 4 Aug 2026 | Studies and research

The preliminary economic model states approximately €6.8 billion of investment. The figure is interesting, but it must not be turned into a promise of return until cash flows, price sources and sensitivity analyses are published. €6.8 bn aggregated CAPEX...

Solar PV on public roofs: how much can it contribute to the 2030 NECP?

by Technical Department Heiwit | 4 Aug 2026 | Studies and research

Italy must rapidly increase photovoltaic capacity by 2030. The roofs of public buildings do not solve the problem on their own, but they can represent a significant share without occupying new land. 79.2 GW NECP 2030 photovoltaic target 37,002...

How we estimated the photovoltaic potential of 41,254 public administration structures

by Technical Department Heiwit | 4 Aug 2026 | Studies and research

A credible national estimate cannot be born from an average surface area multiplied by the number of properties. The Heiwit model uses a geolocated frame, a stratified sample and solar estimates referred to individual elements. Precisely for this reason the steps not yet...

How storage battery prices really compare

by Technical Department Heiwit | 4 Aug 2026 | Studies and research

Two batteries with the same list price can end up costing twice as much as each other by the end of their lives. It's not a paradox: that's what happens when you compare the purchase price instead of the cost of the energy that...

Polyanionic cells: chemistry designed to last

by Technical Department Heiwit | 1 August 2026 | Insights, Sodium ion batteries, New green technologies

If you've ever wondered what truly determines a battery's lifespan, polyanionic cells are one of the most interesting answers to have emerged in recent years. They are a family of chemistries, often sodium-ion based, designed precisely for longevity: thousands of...

Battery cycle life: why it matters more than kWh

by Technical Department Heiwit | 28 July 2026 | Insights, Sodium ion batteries, New green technologies

Let's do a quick quiz. You have two batteries in front of you, both 10 kWh, the same size, similar price. The first states about 3,000 cycles, the second many thousands. Which one is more worthwhile? If you answered “it depends”, you're on the right track. Because the...

Sodium-ion batteries: 20,000 cycles reached by Heiwit battery park

by Technical Department Heiwit | 24 July 2026 | Insights, Sodium ion batteries

When we talk about energy storage batteries, one of the most frequent questions among installers and professionals is always the same: how long does it really last? The answer is measured in cycles. And it is precisely on the front of sodium-ion cycles that the park...

BESS distributed HEIWIT: sunlight from the day can become useful energy in the evening

by Technical Department Heiwit | 19 June 2026 | AI Care, Insights

BESS deployed: daytime sun can become useful energy in the evening For years, we have imagined photovoltaics simply: the sun shines, the panels produce energy, the home or business uses it and any surplus is fed into the grid. It has been a...

Heiwit in Brussels, at the table on the future of the European battery

by Technical Department Heiwit | 11 June 2026 | Insights, Press review

Heiwit in Brussels, at the table on the future of the European battery On 11 June 2026, Heiwit took part in the debate of the European Economic and Social Committee dedicated to the future of the European battery industry. A day during which discussion focused on...

High self-consumption with sodium-ion batteries: data from an Italian plant park

by Technical Department Heiwit | 2 May 2026 | Insights, Sodium ion batteries

Observational study · Residential storage High self-consumption with sodium-ion batteries: data from an Italian plant portfolio Analysis of the distribution of energy autonomy in a portfolio of residential photovoltaic systems equipped with storage...