Renewable Energy Blog
Welcome to our renewable energy blog! Here you will find in-depth information and updates on the clean and sustainable energy sector. Our mission is to promote a greener future, where energy is produced in a sustainable and environmentally friendly way.
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Fotovoltaico e accumulo al sodio: due installazioni Heiwit firmate Tony e Ale Impianti
A San Giuliano Milanese e Canegrate, in provincia di Milano, Tony e Ale Impianti S.r.l. ha realizzato due impianti fotovoltaici con accumulo Heiwit agli ioni di sodio. Due interventi con potenze differenti, accomunati dall’obiettivo di valorizzare l’energia solare...
Inverter Virgo e accumulo al sodio Heiwit per l’impianto di Chianti Energy a Montespertoli
A Poppiano, nel comune di Montespertoli (Firenze), Chianti Energy ha realizzato un impianto fotovoltaico da 6,58 kWp, scegliendo il nostro inverter Virgo Series 6K-S e una batteria agli ioni di sodio da 10 kWh. Una nuova installazione che porta la nostra tecnologia...
Il fotovoltaico ottimista anche a novembre
Perché il fotovoltaico resta ottimista anche nelle giornate più grigie di novembre? Perché sa che il sole, prima o poi, si fa sempre... rivedere. Energia pulita, umorismo pulito: seguici per altre battute solari! 🔋 #Fotovoltaico #EnergiaSolare #Ottimismo
L’auto elettrica e il pannello solare
L'auto elettrica al pannello solare: «Grazie per la ricarica.» Il pannello: «Figurati, è sempre un piacere darti... energia positiva.» Ridere fa bene, risparmiare in bolletta anche di più. 💡 #AutoElettrica #EnergiaSolare #MobilitàGreen
pv magazine Italia interviews Heiwit: the NFPP battery arriving in 2027 and the planned factory in Lombardy
pv magazine Italia's interview with Heiwit: NFPP cells rated for 9,000 cycles at 95% DoD with 70% residual capacity, a 2,500 m² plant in the province of Varese from 2027, and the stated limits of sodium.
SoP, State of Panels: the solar panel health index in AI-Care
AI-Care calculates the SoP, State of Panels, for every system: how well the panels perform today compared with their reference, under the same sunlight and temperature, with three checks on strings, shading and voltage.
LCOS: the real cost of every kWh a battery returns (with calculator)
The cost of a battery is not the price divided by the kWh written on the rating plate. It is the price divided by all the kWh the battery actually returns over its entire life. This figure is called LCOS, the levelised cost of storage. To calculate it, you only need four...
The quote and the customer's smile
The customer looks at the solar PV quote and smiles: “Finally, a bill that makes me say... just kidding, I'm not paying anything.” If that made you smile, your next bill will make you smile even more with Heiwit. ☀️ #SolarQuote #EnergySaving...
Heiwit at Solar & Storage Live Italia 2026: stand, talk and field data
Verona, 7-8 October 2026: the Heiwit stand with battery and inverter, the talk at the Storage Theatre and the pv magazine interview.
La turbina eolica filosofa
The wind turbine looks up at the sky and says: “Not everyone can say it, but I really do live... by the winds of change.” Tag a friend who needs a laugh... a renewable one! 🌬️😄 #WindEnergy #Sustainability #GreenEnergy
Olimpianti chooses Heiwit to revamp an all-electric home in Pimonte
In Pimonte, in the province of Naples, at the foot of the Lattari Mountains, Olimpianti S.r.l. has upgraded the solar PV system of a flat in a family-owned building. The work kept the existing modules, introducing a 6 kW Heiwit inverter, 20 kWh...
The Heiwit adverts: energy you don't have to think about
Three 30-second adverts: "Don't think about it", "It does everything by itself" with AI-Care and "You just enjoy the energy". For each one: the video, the idea behind it, the values and the script.
How to access your Heiwit inverter data via API (Data Act)
A guide to accessing your Heiwit inverter data via the AI-Care API: how to create the token, what you can read, limits and examples for Home Assistant, Excel and Python. Free and read-only, as required by the Data Act.
Il pannello solare influencer
The newest solar panel in the neighbourhood feels like an influencer: “Every day, thousands of rays follow me.” Share this if you, too, support a greener future! 🌞⚡ #Photovoltaic #GreenTrend #SolarEnergy
The battery storage that forgets nothing
Why is the storage battery the most reliable member of the family? Because it's the only one that always remembers... how much it has stored. Clean energy, clean humour: follow us for more solar jokes! 🔋 #EnergyStorage #BESS #RenewableEnergy
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...
Retrofit or replacement? Three existing systems, three different answers
Retrofit or replacement? Three existing systems, three different answers Adding a battery to an existing solar PV system has no single answer. Two things matter: how old the inverter is and what is already in the home. With a young inverter, you add...
Which battery pays off? The game that shows the real cost of energy storage
Which battery pays off? The game that shows the real cost of energy storage The price of a battery does not tell you what it costs. What matters is the cost of every kWh it returns over its entire life: the price divided by the energy it actually delivers. With four...
Heiwit solar PV and battery storage: Clima Commer Service's project on the Palermo coast
Making the most of solar energy to increase self-consumption and reduce dependence on the electricity grid: this is the aim of the installation carried out by Clima Commer Service S.r.l. on the Tyrrhenian coast near Palermo, in the Madonie area. A project...
L’irraggiamento premuroso
How does a solar panel reply when asked how it's doing? “It depends on the day, but I always try to give maximum... irradiance.” Laughing is good for you, saving on your bill even more so. 💡 #Photovoltaic #SolarEnergy #SolarJokes
Rifugio Val Tosella: off-grid energy at 1,376 metres with the Heiwit sodium battery
Rifugio Val Tosella is located at an altitude of 1,376 metres, on Monte Grappa, in the municipality of Arsiè (BL). It is not connected to the electricity grid. The hut's electricity comes from the solar panels on the roof and passes through a Heiwit system with a sodium-ion battery of...
Heiwit systems: 92% of solar potential used. Real data from hundreds of systems
Heiwit systems: 92% of solar potential used. Real data from hundreds of systems Solar PV systems with Heiwit batteries monitored by AI-Care use on average 92% of the solar energy available to them. Three systems out of four exceed 90%...
The old meter and the lighter bill
The old meter complains about being neglected. The bill, much lighter than last year's, doesn't complain at all. If that made you smile, your next bill will make you smile even more with Heiwit. ☀️ #EnergySaving #EnergyBill #Photovoltaic
Il sole che dà la carica
What does the sun say to the solar panel every morning? “Come on, I'll charge you up!” Tag a friend who needs a laugh... a renewable one! 🌬️😄 #SolarEnergy #GoodMorningSunshine #Photovoltaic
La pompa di calore zen
Why does the heat pump never get stressed? Because it has learnt to always find... thermal equilibrium. Share this if you, too, support a greener future! 🌞⚡ #HeatPump #GreenHome #EnergyEfficiency
The solar panel on a rainy day
What does the solar panel say when it rains all day? “That's fine: today I'm treating myself to a day of... energy rest.” Clean energy, clean humour: follow us for more solar jokes! 🔋 #Photovoltaic #WeatherAndSolar #SolarJokes
Sodium batteries and lithium
Why does the sodium-ion battery never argue with the lithium one? Because each simply has... its own chemistry. Laughing is good for you, saving on your bill even more so. 💡 #SodiumBatteries #EnergyStorage #Heiwit
The technician and the finished assembly
The technician finishes installing the system and says: «Mission accomplished: now everything here lights up – except for arguments about the electricity bill.» If that made you smile, your next bill will make you smile even more with Heiwit. ☀️ #PhotovoltaicInstallation #Heiwit...
The punctual electricity network
Why does the electricity grid love solar panels? Because they’re always right on time… with the morning’s energy. Tag a friend who needs a laugh… a renewable one! 🌬️😄 #SolarEnergy #SmartGrid #Photovoltaic
The roof that thinks it’s important
Ever since it had solar panels fitted, the roof of the house has felt special: «At last, I’m the real star of the energy bill.» Share this if you, too, support a greener future! 🌞⚡ #PhotovoltaicSystem #GreenHome #renewables
Sodium-ion storage: current status and future prospects. Our CEO, Alessandro Gallani, at Solar & Storage Live Italia 2026
What is the current state of sodium-ion technology, and what are the prospects for the coming years? This is the topic of the presentation that our CEO, Alessandro Gallani, will give at Solar & Storage Live Italia 2026, entitled “Sodium-ion storage...’.
Heiwit at Solar & Storage Live Italia 2026: see you in Verona on 7 and 8 October
On 7 and 8 October 2026, Heiwit will be exhibiting at Veronafiere at Solar & Storage Live Italia 2026, an event dedicated to the world of solar energy and energy storage systems. The trade fair will bring together over 4,500 attendees, more than 100 exhibitors and over...
The shy solar panel with the inverter
The solar panel to the inverter: «Are you always like this… so taken with my ideas?» The inverter: «Only when the current’s just right.» Clean energy, clean humour: follow us for more solar jokes! 🔋 #Fotovoltaic #Inverter #SolarEnergy
The battery that never runs out
Someone asks the Heiwit battery if she’s tired. She replies: «Absolutely not, I’m full of energy… and I’ve still got plenty of good reasons to keep going.» Laughter is good for you, but saving on your electricity bill is even better. 💡 # Sodium Batteries # Heiwit # Energy Storage
The wind that plays hide-and-seek
Why does the wind never win at hide-and-seek with the wind turbine? Because it always gets caught… on the very first spin. If that made you smile, your next bill will make you smile even more with Heiwit. ☀️ #WindPower #GreenEnergy #GreenJokes
The jealous meter
The old electricity meter complains: «Ever since the solar panels were installed, nobody in this house pays any attention to me anymore.» The electricity bill replies: «Lucky you.» Tag a friend who needs a laugh… a renewable one! 🌬️😄 #Electricity bill #Self-consumption #Solar panels
The Grateful Light Bulb
A light bulb says to the solar panel: «I owe you everything.» The panel replies: «Let’s just say it’s a matter of… mutual illumination.» Share this if you, too, support a greener future! 🌞⚡ #SolarEnergy #SolarPower #SolarJokes
Solar power and winter holidays
Why do solar panels never take a winter break? Because even when there’s little sun, they always find a way to perform at their best. Clean energy, clean humour: follow us for more solar jokes! 🔋 #SolarPowerWinter #SolarEnergy #Renewables
The marriage of the panel and the turbine
A solar panel and a wind turbine tie the knot. As they exchange vows, they say: «Energy forever, in tension and in power.» Laughter is good for you, but saving on your energy bills is even better. 💡 #renewableEnergy #Sustainability #GreenJokes
Storage that works seamlessly with the grid
Why does the storage system never clash with the electricity grid? Because they always prefer to reach a… bilateral agreement. If that made you smile, your next bill will make you smile even more with Heiwit. ☀️ #Storage #BESS #RenewableEnergy
The technician and the loaded panel
A technician asks the solar panel: «How’s it going today?» The panel replies: «Great, I’m fully charged!» Tag a friend who needs a laugh… a renewable one! 🌬️😄 #PhotovoltaicInstallation #SolarEnergy #Heiwit
HEIWIT sodium battery with NFPP cells: 9,000 cycles at 95% DoD and 70% residual capacity
HEIWIT presents its new polyanionic-chemistry sodium-ion battery: 9,000 cycles at 95% DoD with 70% residual capacity and a high level of safety. Prototypes on show in Verona on 7 and 8 October 2026, on sale from early 2027.
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, there is one figure that is cited more 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 evolved...
NFPP sodium-ion cells at low temperatures: 95% capacity at −20 °C in qualification tests
There is a shortcoming of domestic batteries that the catalogues say little about: they perform less well in the cold. This is not a minor detail, because the time when they perform less well is precisely when they are needed most. In January, solar panels produce a fraction of...
Sodium-ion cell safety: what the evidence really says
"Is it safe?" is the first question people ask us, and whoever asks it is right. A battery is not a tank: it is an electrochemical system that stores energy in chemical form and which, when pushed beyond its limits, can release it all at once. The serious answer is not….
The solar panel and the nosy cloud
A solar panel to a cloud: «Would you mind moving? You’re blocking my career.» Share this if you, too, support a greener future! 🌞⚡ #Photovoltaic #WeatherESolar #SolarJokes When the cloud really does cast a shadow, it’s the battery that keeps the...
The ever-optimistic battery
Why are sodium-ion batteries always in a good mood? Because they always see the… charged side of life. Clean energy, clean humour: follow us for more solar-powered jokes! 🔋 #SodiumBatteries #Storage #PositiveEnergy For us, the ‘charged’ side of life is….
Industrial BESS: duration and safety before density
In large-scale storage systems, value is measured by cycle life, safety and whole-lifecycle cost. That is why energy density matters less than you think.
The sun changes jobs
Why did the sun quit his job in the mine? Because he wanted a more… renewable job. Laughing is good for you, but saving on your energy bills is even better. 💡 #SolarEnergy #Renewables #GreenJokes The sun has changed jobs, and energy storage is doing the same: sodium is a...
High-current batteries: how they handle real-world stress
Many batteries shine in the lab but stumble under stress: high currents, cold temperatures and heavy use. Here is how to judge an energy storage system that actually has to work.
The shy wind turbine
Why doesn’t the wind turbine ever go dancing at parties? Because it’s embarrassed about always being… the one most affected by events. If that made you smile, your next bill will make you smile even more with Heiwit. ☀️ #WindPower #RenewablesThatMakeYouLaugh #GreenEnergy
The inverter that never gets angry
An inverter is triggered by an old analogue meter. It remains perfectly calm: «I’m always alternating between high and low, but I never lose the phase.» Tag a friend who needs a laugh… a renewable one! 🌬️😄 #Photovoltaic #Inverter #SolarEnergy The inverter remains...
Battery safety: what happens when they heat up
What makes a battery safe? From thermal runaway to stable chemistries, a clear guide to energy storage safety for installers and designers.
Can the public administration become self-sufficient? Energy, self-consumption and emissions
Why annual production, self-consumption, storage and emission reduction are different quantities.
From potential to operational plan: how to solarise public buildings
A concrete roadmap covering asset register, feasibility, EPBD, ESCo, renewable energy communities, procurement and monitoring.
5.68 GW and 7.53 TWh on public administration roofs: results and significance
The technical results declared by the Heiwit model, the distribution by area and typology, and the correct equivalences.
How much does it cost to solarise public roofs? CAPEX, LCOE and economic variables
The CAPEX stated by the model, the economic assumptions, and what is missing to publish replicable IRR, LCOE and payback.
Solar PV on public roofs: how much can it contribute to the 2030 NECP?
The NECP target, the photovoltaic capacity gap and the theoretical contribution of Italian public building roofs.
How we estimated the photovoltaic potential of 41,254 public administration structures
OpenStreetMap, stratified sampling, Google Solar API, PVGIS and GSE: the method and remaining open inconsistencies.
How storage battery prices really compare
The list price does not tell you how much energy costs. The four numbers to look at, the formula to put them together and a calculator to do it on your quotes.
Perché è sempre di buon umore.
Why does a solar panel never have a row with anyone? Because it always prefers to come to an agreement… in direct current! Share this if you too support a greener future! 🌞⚡ #RenewableEnergy #Photovoltaics #SolarJokes Jokes aside, direct current that...
Polyanionic cells: chemistry designed to last
Polyanionic cells promise stability and longevity thanks to a robust crystal lattice. Here's how they work and where they fit among battery chemistries.
Battery cycle life: why it matters more than kWh
Two batteries with the same capacity in kWh can have completely different values. The reason? Cycle life. Here's how to read and compare it.
Sodium-ion batteries: 20,000 cycles reached by Heiwit battery park
The Heiwit sodium-ion battery park has reached 20,000 cycles. A technical milestone that, thanks to the AI-CARE smart energy manager, is providing us with valuable data on the future of storage.
Two new installations of Heiwit storage systems carried out by BMAX Service of Beatrice Piepoli
Our Installations Gallery is enriched with two new Heiwit storage systems manufactured in Puglia by our installer.
New installation in the province of Bologna
The Installation Amongst the installations made with Heiwit solutions, we are presenting an installation carried out at a new home in the province of Bologna by our Premium Partner S.O.S. Luce by Candini Renato. In this project, a battery was installed...
Fully electric house in Carcare: photovoltaic, Heiwit storage and heat pump for greater energy independence
Removing gas and making one's home fully electric: this is the objective of the project carried out in Carcare (SV) by our premium partner Ferrari Security Innovation & Service. To meet the client's needs, a...
BESS distributed HEIWIT: sunlight from the day can become useful energy in the evening
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...
Record Heiwit: 3 MWh of solar energy produced in a single day
Today, Heiwit plants have reached a new milestone: 3 MWh of clean energy produced in a single day. An important result that concretely demonstrates the value of our model: transforming available surfaces, photovoltaic systems and...
Heiwit in Brussels, at the table on the future of the European battery
On 11 June 2026, our founder and CEO Alessandro Gallani took part in the European Economic and Social Committee's debate on the future of the European battery industry. It was a day that discussed competitiveness, energy, and people – and the role that ’made in Europe“ sodium can play in the continent's industrial sovereignty.
Revamping of photovoltaic system in Palermo: I.M.E.R.T. S.N.C. installs a Heiwit system with 20 kWh of storage
In Palermo, within a semi-detached villa, I.M.E.R.T. S.N.C. has recently completed an upgrade and replacement of an existing photovoltaic system, opting for a Heiwit solution to improve the system's performance and increase...
Selecta S.r.l. has chosen to exhibit Heiwit batteries at its stand in the Palladio Shopping Centre in Vicenza.
The growing focus on energy efficiency and sustainable solutions is leading more and more companies to invest in innovative technologies to present directly to the public. In this context, Selecta S.r.l. has chosen to exhibit its storage batteries...
AI-Care smart estimator: from bill to photovoltaic project in minutes
The AI-Care Estimator starts with the bill, analyses real consumption, roof layout, and economic simulation to build faster and more coherent photovoltaic proposals.
Energy Manager AI: sell energy when it's worth more and use the battery better
Energy Manager AI analyses production, consumption, weather, and hourly energy prices to decide when to store, self-consume, or feed into the grid.
AI-Care: intelligent monitoring that transforms every photovoltaic system into a controlled platform
Real-time monitoring, comparison between expected and actual production, consumption analysis, and fleet control: AI-Care brings photovoltaics into a new phase of intelligent management.
Where does the name HEIWIT come from? Nobody really knows. And that's precisely the beauty of it.
Where does the name HEIWIT come from? Nobody really knows. And that's precisely the beauty of it. There are company names that are born after months of meetings, consultants, focus groups, whiteboards full of arrows, domain names checked at three in the morning, and endless discussions...
Heiwit system installed by Eliotech in Roccaforzata (TA)
New installation completed in Roccaforzata, in the province of Taranto, where Eliotech has installed a photovoltaic system integrated with a 10 kWh Heiwit sodium-ion storage system. The project includes: 18 x 450 Wp photovoltaic modules on 2...
The Heiwit plant in Almè: a home increasingly oriented towards the electrification of consumption
Heiwit storage solutions continue to be at the forefront of residential projects focused on energy efficiency and the progressive electrification of homes. This is the case with the installation carried out in Almè, in the province of Bergamo, by Arizzi...
Heiwit residential installations: Gruppo Green Italia's experience
Heiwit's storage solutions continue to find application in increasingly diverse residential contexts, thanks to their ability to combine safety, ease of installation, and reliable performance. In recent months, Upsell's Green Italia Group...
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 energy autonomy distribution on a portfolio of residential photovoltaic systems equipped with storage systems...
Heiwit Installation at the Natural Power Showroom in Cagliari
Heiwit storage solutions continue to spread, even in demonstration contexts, designed to showcase technologies dedicated to energy independence up close. One example is the installation carried out by Natural Power Soc. Coop. at its own headquarters...
New Heiwit installations in Tuscany: efficiency, simplicity, and satisfied customers
When reliable technology and qualified installers meet, the result can only be positive. In recent months, Ricarica Energy To Move, a company specialising in energy efficiency, photovoltaic systems, and solutions for electric mobility, has...
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...
HEIWIT reaches 60 MWh of production in the first months of 2026
HEIWIT reaches 60 MWh of production in the early months of 2026. In the early months of 2026, the HEIWIT systems installed throughout Italy, from Trentino to Sicily, reached by the end of April the milestone of 60 MWh of production. It's a result that concretely tells the...
AI storage: how artificial intelligence accumulation can increase GSE revenue
AI storage: how artificial intelligence accumulation can increase GSE revenue Today, the issue is not just how much energy a photovoltaic plant produces, but also when it is convenient to consume it, store it, or sell it to the grid. And this is precisely where...
Do Heiwit sodium-ion batteries cost more than lithium-ion batteries?
A 1L drink at 3 euros or a 0.5L one at 2 euros? The answer seems obvious. And yet, it’s precisely the mistake many people make when commenting on the price of a battery. They only look at the initial price, without asking themselves how much energy that battery...
HEIWIT is participating in Green Energy Day 2026 with a photovoltaic system equipped with a sodium-ion battery storage system.
Among the awards presented during KEY Energy 2026, we presented the Innovation Ambassador Award 2026 to Ricarica Energy to Move, a partner who has distinguished themselves for their strong promotion of Heiwit technology and, more generally, for a vision of energy in which production from renewable sources, storage, and electric mobility interact in an increasingly integrated way.
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