France’s Sunology announces Storey, a Modular Residential Battery that supports greater solar self-consumption

PARIS, FRANCE – September 12, 2025 – Sunology, a solar technology company based in France, is introducing Storey, a modular residential battery system that helps homeowners maximize solar self-consumption. The product is designed to let homeowners store excess solar power more effectively and augment their solar supply, giving households more energy flexibility as part of a transition to net-zero-systems and sustainable energy transition alternatives.

Scalable and User-Friendly Design

The best aspect of Storey is it has a modular design. Each small unit provides 500 W of nominal output and 2,200 Wh of storage. A homeowner can order one module, two, three or four modules, providing a maximum output with four modules of 2,000 W and 8,800 Wh of power. Power output is adjustable in 1 W increments, to help manage energy use. Each unit has a built-in inverter, making installation easier and allowing families to scale the Storey modules based on their needs.

Versatility and Ease of Installation

The system is made to be widely compatible, so Storey can work with single-phase and three-phase electrical systems and integrate with all major solar inverter brands. Storey has two different installation options via its solar storage offerings: the first option would be a direct electrical connection to the main panel, and the second would be plug-and-play setup via a standard power outlet for a home that is utilizing a portable solar kit. This means that even homes without rooftop panels can store solar energy.

Performance and Reliability

Sunology claims that Storey achieves up to 90% efficiency of energy conversion, and it offers a 15-year warranty on up to 7,500 charge cycles. Both the emphasis on durability and performance help foster a consumer trust in a long-term energy storage solution, which could further be supported by methodology through national and international energy trends. The system actively tracks energy production and consumption and will capture an excess of solar energy within two seconds to avoid a grid feed-in and enhance self-use as needed.

Smart Energy Management

Storey integrates with Sunology’s energy management platform, which allows for real-time monitoring with a mobile app. Users can see the flow of energy, make adjustments remotely, and plan energy usage based on the weather forecast and their household’s energy patterns. When the power goes out, Storey has the ability to power essential appliances for short periods of time through its built-in outlet or directly to the electrical panel, depending on demand and battery capacity at this time.

Market Context and Vision

Storey is being offered at a time when France’s energy transition policies are abound, including tax incentives and subsidies for solar and solar storage systems. Vincent Arrouet, co-founder of Sunology, explained the rationale behind their offerings: “When the public energy service is not working properly we develop products of public utility. The main objective is to ensure people can utilize every last kilowatt-hour of solar energy before they send it back to the grid.”

Pricing and Availability

Storey is priced at a promotional rate of €1,390 (including VAT) per module, allowing for good access for all types of homeowners. Sunology seeks to drive a simple and user-friendly product at a low price point to maximize adoption.

The Future

As residential energy storage grows in popularity in France and across Europe, Sunology’s Storey is a big step toward decentralized and democratized energy. The Storey will have application for the wider adoption of smart home and renewable energy systems, and Sunology certainly has a clear opportunity to become an early player in the clean energy system where things are developing quickly.

About Sunology

Sunology is a French solar technology company committed to providing innovative and accessible renewable energy products. In addition to the rooftop solar systems and the plug-and-play solar kits, Sunology is now diversifying into modular energy storage products to enable households to take charge of their energy consumption.