We’ve calculated your future savings

The numbers are clear: France uses only 294 W/h per capita, dwarfing its European neighbors. The Netherlands leads the way with 1280 W/h, followed by Germany (985 W/h) and Denmark (832 W/h). This is a paradox when we know that the sun is not necessarily better in these countries. Against this background, Sunology recommends further launching new domestically produced solar cells.

In short, forget everything you know about solar cells. layer It can be placed anywhere you want, just plugged in, and best of all – and this is a rarity in the industry – it’s stylish.

It’s a battery that stacks like Lego, has a passive cooling system (so no noise), and is designed not to interfere with your internals.

But it’s not just the design, the real innovation is behind the scenes. Storey is a battery that can think for itself. It automatically tracks when energy is cheapest, whether through solar panels or during off-peak hours. Algorithms continuously optimize storage to maximize savings for you. Best of all, you don’t need to plug them directly into your solar panels.

The idea is to completely rethink how energy storage is accessed: you just plug it into a traditional power socket and it works, as easily as a household appliance. No more complicated installation and electrician intervention, just a gesture is enough to start storing and using your energy.

The most interesting? You don’t have to have solar panels. The battery can also work independently, charging during off-peak hours to restore energy when prices rise.

If required, you can choose to have it professionally installed (turnkey), or wire it up yourself. You can use it well with other brands of solar panels, whether they are plug-and-play or rigid solar panels on your roof.

While it simply plugs and plays on a standard outlet, it is also capable of connecting directly to the house’s electrical panel for further integration and is therefore capable of outputting 6000 watts, making it compatible with all types of inverters and solar installations, whether single phase or three phases.

Its design includes casters for easy movement around the house, and an integrated Schuko-style socket that delivers up to 2000 W to power devices directly. This also makes it a mobile emergency solution during power outages. If necessary, it can even be rolled outside to power the machine.

According to Sunology, it is able to quickly detect (less than 2 seconds) energy storage opportunities. Each module has a capacity of 2200 Wh and a power of 500 W, which can be expanded to an impressive 26,400 Wh capacity by combining multiple units.

Sunology’s real challenge to Storey is competing with the Chinese giant. EcoFlow, Anker Solix, Zendure and Bluetti. Sunology has made an interesting choice: focusing on fixed homes, with extensive integration and a unique plug-and-play approach. For players who often settle for offering the same product, this bet could pay off.

The difference comes down to software. Chinese competitors excel in hardware, but their software solutions often remain basic. Everything about Storey is focused on intelligence: ultra-fast detection of energy surplus, instant optimization, and consumption prediction.

The French company has shown it can compete at the premium end of the market. This is the first time that French players have shown such ambitions in energy storage, with a complete range, which can be said to be the beginning of complete autonomy.

Beyond simply connecting batteries, Sunology paints a vision where energy is no longer a centralized service, but a commodity that everyone can freely produce, store, and exchange. Nantes is laying the first bricks of an autonomous interconnected energy network through Storey, where individuals can not only manage their own energy, but also share it with their neighbors through a so-called peer-to-peer network.

Let us continue to calculate

Let’s do a little math and imagine the profitability of such a system.

with solar panel

In the first configuration with 2000 W panels (2300 kWh/year, equivalent to four solar panels installed in the garden or balcony), only one 2200 Wh Storey Master can achieve 70% self-consumption. With a difference of 13 cents between grid (€0.25 – regulated rate) and stored solar (€0.12), and taking into account prudent energy inflation of 10% per year, the return on investment is determined to be €1,390 over 5 years. Adding extensions is irrelevant in this case because the payback period is 8.5 years without any significant benefit from self-consumption.

On the other hand, if 4000 W panels are installed, generating 4600 kWh per year, the situation changes radically. Obviously, here we are moving more to a house configuration with rigid panels on the roof.

The Storey Master alone achieves 60% self-consumption (2760 kWh), while the Master + Extension configuration pushes this ratio to 80% (3680 kWh). Annual savings therefore increase from €358.80 to €478.40, which also includes the impact of energy inflation. In this case, the return on investment becomes even more attractive: 3.9 years for the Master alone and 5.4 years for the complete configuration.

In short, the profitability of a solar energy storage system mainly depends on its ability to maximize its own consumption. So it depends on its size in relation to the solar installation. Bottom line: the larger your solar installation, the more your battery amortization will be (and then you’ll be able to add expansion capabilities).

Does not include solar panels

Last question: Is it fun to not have solar panels? We did the math. Just using Storey to arbitrage between peak hours (25c/kWh) and off-peak hours (17c/kWh) is not economically interesting.

The battery has a capacity of 2200 Wh and an efficiency of 90%. It can store and effectively use 1.98 kWh of electricity per day and 722.7 kWh of electricity throughout the year.

The difference of 8 cents between peak and non-peak hours only saves €57.82 per year, giving a payback period of 24 years for an investment of €1,390. Even taking into account the annual electricity price inflation of 10%, the investment return period exceeds 15 years (guaranteed period), and profitability is still insufficient.

In short, Storey only shows its true value when combined with solar installations, where the larger spread (13 cents) and the maximization of self-consumption make it possible to achieve more interesting profitability.

Rhythm without solar panels

Except, perhaps, in one case: Tempo quotes. Let’s start with the final calculations.

EDF’s Tempo electricity prices offer dynamic pricing in three colors (blue, white, red) and peak/off-peak hours, creating six different electricity prices ranging from 11.88c €/kWh (off-peak hours on blue skies) to 74, 29c €/kWh (red day peak hours). As you can see, the idea is to use Storey to store energy during the cheapest times and release it during price peaks, especially during the 22 red days of the year.

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Calculations show that red days result in savings of approximately €26.40 (a difference of €60.65/kWh) and 43 white days result in savings of €2.70 (a difference of €3.17/kWh). use.

Therefore, you can definitely see the conclusion: the total annual savings is about 29.10 euros, and even taking into account the increase in electricity prices, investing 1390 euros in Storey for the only Tempo price arbitrage is not justified – you will understand, Batteries only make sense when combined with solar installations, where they optimize self-consumption and save more money.

Price and availability

Although this is a French solution, Storey is aggressively moving into the domestic battery market. The entry price for the main module is 1390 euros (2200 Wh / 500 W) and expansion module for 1190 euros (you can buy it later).

Sunology provides us with a 5% discount promo code, SUN_FRANDROIDpre-sale will start on September 15th, the pre-order price is 79 euros, the amount will be obviously deducted from the final order.

The LiFePO4 technology used has an ultra-long lifespan and comes with a 15-year warranty covering 7,500 charge/discharge cycles, or over 20 years based on one daily cycle.

Sunology announced it will be available in mid-2025.

What game?

In the smart home battery market, Storey faces tough competitors.

The Zendure Hyper 2000 is undoubtedly the best equipped, while the Anker Solarbank 2 relies on its ease of installation and excellent value for money. Even more impressively, the EcoFlow Delta Pro 3 combined with a PowerStream microinverter provides a complete solution, but requires a more complex installation.