Size and weight of storage batteries: the comparison to scale
Size and weight of storage batteries: the comparison to scale A sodium-ion battery is not a huge cabinet. Placed on the same scale, using the dimensions stated by the manufacturers, Heiwit batteries fall within the same size and weight range as...
Which battery pays off? The game that shows the real cost of energy storage
Quale batteria conviene? Il gioco che mostra il vero costo di un accumulo Il prezzo di una batteria non dice quanto costa. Quello che conta è il costo di ogni kWh che restituisce in tutta la sua vita: il prezzo diviso per l’energia che eroga davvero. Con quattro...HEIWIT sodium battery with NFPP cells: 9,000 cycles at 95% DoD and 70% residual capacity
Over the past few months, we’ve been telling you how the world of energy storage is changing: the limitations of traditional chemical technologies, the race for critical materials, and the search for safer and more durable solutions. Our last article ended with a question: “And….NFPP polyanionic cells: the second generation of Heiwit sodium-ion batteries
Sodium-ion batteries are not a single technology. The same name encompasses a wide range of very different cathode chemistries, with varying characteristics in terms of lifespan, safety and performance in cold conditions. The first generation of Heiwit systems uses a cathode made of...Energy density versus lifespan: which really matters in stationary storage
When comparing storage technologies, one figure is cited more often than any other: energy density, measured in watt-hours per kilogram. It is the parameter that has driven twenty years of battery development, for one simple reason: batteries have...NFPP sodium-ion cells at low temperatures: 95% capacity at −20 °C in qualification tests
There is a flaw in domestic batteries that the catalogues rarely mention: their performance drops in cold weather. This is no minor detail, because the time when their performance drops is precisely when they are needed most. In January, solar panels produce only a fraction of...Sodium-ion cell safety: what the evidence really says
“Is it safe?” is the first question people ask us, and they’re quite right to do so. A battery isn’t a fuel tank: it’s an electrochemical system that stores energy in chemical form and which, when pushed beyond its limits, can release all that energy at once. The answer...Industrial BESS: duration and safety before density
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
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
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...
Polyanionic cells: chemistry designed to last
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
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
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...
High self-consumption with sodium-ion batteries: data from an Italian plant park
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...
Artificial Intelligence and Photovoltaics: how AI-CARE optimises energy self-consumption
Artificial Intelligence and Photovoltaics: how AI-CARE optimises energy self-consumption In recent years, the integration of photovoltaic systems and storage systems has transformed how we produce and use energy. However, the real leap...
From bill to positive balance: 31 days with HEIWIT ⚡
From bill to positive balance: 31 days with HEIWIT ⚡ Yes, you read that right. In the last 31 days, in one of our systems the energy sold exceeded the energy bought: the measured balance is positive by €61.65. The balance covers energy only (it does not include...
Sodium-ion self-discharge: only 6% lost over 539 days
Sodium-ion self-discharge: only 6% lost over 539 days When discussing storage batteries, the focus is often solely on capacity, power and price. But there is one parameter that says a great deal about a battery’s true quality: self-discharge. And it is precisely here...
How much raw material is really needed for sodium-ion batteries? The scientific calculation, explained simply
How much raw material is really needed for sodium-ion batteries? The scientific calculation, explained simply Spoiler: no, the sea wouldn't be desalinated if all the batteries the world needs were sodium-ion. Let's see why. When talking about batteries...
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