BESS deployed: daytime sun can become usable energy in the evening

For years, we've imagined photovoltaics simply: the sun shines, the panels produce energy, the home or business uses it, and whatever is left over is fed into the grid.

It has been a huge change. Millions of families and businesses have stopped being just consumers and have also become producers of clean energy.

Today, however, we are facing an even more important juncture.

It's no longer enough to produce renewable energy. We need to learn how to use it, conserve it and make it available when it's truly needed.

The sun produces most during the central hours of the day. But the highest consumption, especially in homes, often occurs in the evening: when we return home, we turn on lights, kitchen appliances, air conditioning, heat pumps, electrical appliances, and recharge our electric car.

This is where the concept of BESS distributed.

Not one large battery far from people. But thousands of batteries installed in homes, businesses, apartment buildings, shops and sheds, capable of storing energy when it is abundant and making it available later, when it can be truly useful.

The paradox of solar energy

Solar power has an extraordinary characteristic: it produces clean, local, and silent energy.

But it also has a natural challenge: it produces when the sun shines, not necessarily when the demand for energy is highest.

At midday, thousands of plants produce simultaneously. On many sunny days, especially in the spring and summer months, a large amount of energy is fed in during the same hours.

In the evening, the opposite happens.

Photovoltaic production drops to almost zero, while consumption increases. The grid then has to supply more energy precisely at the moment when the sun can no longer contribute directly.

For a long time, this was considered inevitable.

Today, it is no longer so.

With a storage system, energy produced during the day can be stored and used in the evening. With intelligent management, it can be programmed, protected, optimised, and made available at the most useful time.

The sun no longer has to stop at sunset.

A distributed BESS (Battery Energy Storage System)

BESS stands for Battery Energy Storage System, which means battery storage system.

A traditional BESS can be a large centralised plant: battery containers connected to the grid, a photovoltaic park or an industrial site.

A BESS distributed It follows a different logic.

It is made up of many smaller batteries, installed near the places where energy is produced and consumed: homes, apartment buildings, businesses, shops, schools, warehouses, shopping centres, and industrial sheds.

Every battery works first and foremost for its user. But, when connected to an intelligent platform, it can also contribute to a broader vision of energy.

A single battery stores energy. Thousands of coordinated batteries build flexibility for an entire territory.

This is the heart of distributed BESS: transforming many small, independent systems into a large, widespread energy resource.

From excess energy to evening availability

One of AI Care's most interesting features is precisely the ability to manage surplus energy produced during the day, preventing it from necessarily being fed straight into the grid.

When photovoltaic production is high and local consumption is low, the system can assess whether to store some of the energy in a battery.

This energy can then be used in the evening hours to increase self-consumption, reduce grid draw, power a heat pump, support the charging of an electric car, or make energy available when demand is higher.

In some configurations and in enabled energy services, this same logic can allow the valuation of energy to be shifted from the central hours of the day to the evening hours.

The logic is no longer simply: “I produce and sell immediately”.

Become “I produce now, but I intelligently decide when to use or value this energy.

This profoundly changes the role of photovoltaics.

The plant is no longer just an energy generator. It becomes a resource capable of adapting to consumption, grid conditions, and the individual user's needs.

AI Care: the battery that doesn't wait, but decides

A traditional battery often follows simple rules: it charges when there is production and discharges when the sun is absent.

AI Care introduces more advanced logic.

The battery must not only charge and discharge. It must understand the energy context in which it is working.

How much will photovoltaics produce in the coming hours? What will the consumption of the house or company be? How much energy is it advisable to keep in reserve? When is it most useful to increase self-consumption? When might it be appropriate to reduce feeding into the grid during hours of strong local production?

AI Care is born to transform these data into decisions.

Not rigid management, the same every day.

But a system capable of adapting to production, consumption, forecasts, and energy habits.

On a very sunny day, the battery can prepare to absorb excess energy. On a day with low projected production, it can adopt a more cautious strategy. In the presence of high evening consumption, it can preserve a portion of energy for the following hours.

This is the transition from simple accumulation to intelligent accumulation.

A new infrastructure, built building by building

For decades, the electricity grid has been designed around a few large power stations that produce energy for millions of users.

Today the model is changing.

Roofs generate energy. Companies generate energy. Apartment buildings generate energy. Car parks, warehouses, canopies and industrial buildings generate energy.

The electrical system has become distributed.

It now also needs to become intelligent.

Distributed BESS can precisely assist in this journey. It does not replace large industrial batteries, power lines, transformers, or substations. But it can complement them, making the entire system more flexible.

When many batteries are present in the same territory, they can absorb some of the excess energy during the central hours of the day. They can reduce demand in the evening hours. They can help to distribute energy better over time.

It is a new form of infrastructure.

Not built with just cement, copper and steel.

But also with batteries, software, data, algorithms, and distributed intelligence.

From individual autonomy to collective strength

Installing a photovoltaic system with storage is, first and foremost, a choice for autonomy.

It means making greater use of the energy generated on your own roof. It means reducing your reliance on energy purchased from the grid. It means making your home or business more efficient.

However, distributed BESS adds a new dimension.

Each battery continues to work for its owner, but it can become part of a larger system. A system where thousands of users contribute, each with their own storage capacity, to make energy more stable and more available at the right times.

The real energy transition will not depend solely on how many panels we install.

It will depend on our capacity to coordinate production, consumption, storage, and the grid.

It will depend on the capacity to shift energy through time.

It will depend on how well we can make what is currently simply electric into something intelligent.

The role of sodium-ion batteries

To build a distributed BESS, storage technologies are needed that are designed to work daily, close to people and close to buildings.

Sodium-ion batteries represent a particularly interesting technology for stationary storage. They don't have to chase the extreme lightness required by smartphones or high-performance vehicles.

They have to do something equally important.

They have to work every day.

They must accumulate clean energy.

They must help families and businesses use it better.

They must become a concrete part of the energy infrastructure of the future.

This is the direction that Heiwit wants to help build.

The sun of the day, the energy of the evening

For a long time, the sun had a limit: only producing when it shone.

Today, thanks to accumulation and intelligent systems like AI Care, that limit can be overcome.

Energy produced at midday can contribute to consumption at 8pm.

It can help a family when they come home.

It can support a company after the end of photovoltaic production.

It can reduce network withdrawals during peak hours.

It can become part of a new energy infrastructure, closer to people and better suited to the world of renewables.

This is the distributed BESS.

Not one single large battery far from everyone.

But thousands of smart, connected and coordinated batteries.

An energy grid capable of storing today's sunshine and making it available in the evening, when it's truly needed.

With AI Care, energy isn't just produced.

It is understood, safeguarded, and used at the right time.

Note: The modes of energy storage, self-consumption, injection, sale, and valorisation depend on the system configuration, available services, network technical conditions, and applicable contracts.