The Energy Storage Report 2024

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The future of home energy: Huawei’s flagship residential energy storage product

By Solar Media Staff

Huawei’s flagship Residential Solar ESS product, the LUNA2000-7/14/21-S1 (Huawei LUNA S1), represents a significant leap in home energy solutions technology.

With exceptional energy efficiency and enhanced safety features, it offers a pleasant user experience and transforms the way homeowners consume and store energy, while providing numerous benefits to installers.

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Conquering challenges with the next-gen product

In response to pressing challenges faced by the industry and consumers alike, innovative technologies are needed. One crucial challenge is the urgent demand for a ‘green revolution’.

Homeowners now recognise the importance of using renewable energy and want to contribute positively to the environment. Soaring electricity prices and frequent power outages are also pushing people for renewable energy solutions. The market needs to adapt to these dynamics.

In this case, residential energy storage systems (ESS) have emerged as game-changers, empowering homeowners to fully utilise solar energy and reduce their carbon footprint.

Traditional green power products face concerns such as rooftop fires, energy storage security, complex installations, and limited product lifespan.

Huawei’s latest offering, the Huawei LUNA S1, tackles these issues head-on by providing security, simplicity, excellent user experiences, and sustainability.

Industry-leading service life and usable energy capacity

Huawei’s flagship Residential Solar ESS product incorporates innovative technologies to optimise energy usage and achieve energy savings with its up to 15-year limited warranty[1], which is at the forefront of the industry.

This means a higher ROI for householders – it will be more years of pure savings once the amount saved on power bills equals the cost of their solar system.

Additionally, the system utilises custom-designed 280Ah battery cells, surpassing the industry-standard 120Ah cells. As stated by Huawei, this results in the excellent usable energy capacity (4.2MWh), which is over 40% higher compared to other vendors Huawei has achieved these breakthroughs through its innovative module architecture and patented temperature control systems.

The flagship product introduces the groundbreaking Module+ technology, featuring an integrated energy optimiser.

This enhances the overall performance of the system, maximising energy efficiency. Furthermore, Huawei’s patented cold and hot compartment structure overcomes heat-related problems posed by high-flow battery cells.

5-layer protection to ensure safety and reliability

Safety and reliability are paramount in residential energy storage systems, and Huawei’s solution offers comprehensive protection. The system is designed to withstand extreme conditions, from –20°C to +55°C, including submersion in water, heavy snowfall, and extremely low temperatures.

It incorporates a five-layer safety protection mechanism, which includes cell-level protection, electrical protection, structural protection, active protection, and emergency protection.

These features ensure the system’s robustness and minimise risks:

  • Cell-level protection: The cell has been subjected to rigorous tests, such as cycle tests (up to 1/8 of cycle life) and puncture tests
  • Electrical protection: It excels in multiple protection measures, such as overcharge, overvoltage, overcurrent, overtemperature and external short circuit protection
  • Structural protection: Industry’s 1st IP66+ protection, industry’s 1st 40 cm water immersion protection for 72 hours[2]; High-strength chassis, heavy pressure resistance that up to 5 tons, 20% hydrogen explosion test
  • Active protection: Huawei LUNA S1 provides real-time cell-level temperature and voltage detection, intelligent ports detection, state of health (SoH) calibration for full-lifecycle health protection
  • Emergency protection: It contains the industry’s only emergency fire suppression module, with world-leading active pressure release technology. Once the temperature reaches 190±15°C, the product will emit gas to effectively suppress the fire chemically.

Easy and intelligent user experience

The user experience is one of the key aspects of Huawei’s Residential ESS. The installation process is simplified, saving more than 50% of installation time compared to traditional systems. There are no communications cable or power cable required between modules. The system also generates lower noise levels, providing a more pleasant environment for homeowners.

The modular design of the system enables homeowners to start with a 6.9kWh unit and easily expand the capacity by adding additional modules. Expansion is simplified, as there is no need for pre-charging or SOC calibration. The new battery pack automatically synchronises its state of charge (SoC) with the existing setup after just one charge/discharge cycle, providing a smooth and efficient capacity expansion process.

This smart string ESS can integrate seamlessly into any modern smart home, offering a seamless setup experience through a single app. The app offers remote monitoring and control capabilities, allowing users to manage their energy storage system from anywhere.  making it convenient and hassle-free for users.

Ultimate product design aesthetics

Huawei LUNA1 offers 72-hour protection against water immersion. Image: Huawei

Huawei LUNA S1 is a beautiful piece of equipment that has been designed to look like a work of art in every home. Its design takes a minimalist approach, which is easy to integrate into any home interior style.

It also features a concentric design that is simplistic and borderless. It seamlessly blends with the surroundings, enhancing the overall visual appeal.

The system incorporates a smart capsule-shaped atmosphere light, which looks like a “breathing star”, adding a touch of warmth and elegance to the design. Additionally, the functional and decorative side grille further enhances the aesthetics while serving practical purposes.

A home that always shines: Advancing the zero-carbon journey

Huawei’s zero-carbon household concept is realised through its end-to-end customised PV solution. Huawei LUNA S1 joins Huawei’s advanced FusionSolar Residential Smart PV Solution currently serving over 3.3 million households worldwide[3].

To visualise the tangible benefits of this green vision, consider the environmental impact of one 30 kW green power system: its annual power generation is approximately 36,000 kWh, which is equivalent to planting 930 trees annually (about 2 per day) and reducing carbon dioxide emissions by about 17 tons each year.

With Huawei’s advanced FusionSolar Residential Smart PV Solution, the system can meet up to 90% of a household’s energy needs, with the potential to achieve 100% in the future. This paves the way for a zero-carbon household, reducing dependence on traditional energy sources and contributing to a greener planet.

[1] Warranty conditions may vary by region and temperature. Please refer to the warranty letter for details.

[2] Huawei LUNA S1 is not designed for prolonged underwater use. It cannot be submerged over the depth limit or used for a maximum of 72 hours underwater. Please keep the product away from water sources during daily use.

[3] Data as of the end of 2023.

8 October 2024
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 8-9 October 2024 is our second PV CellTech conference dedicated to the U.S. manufacturing sector. The event in 2023 was a sell out success and 2024 will once again gather the key stakeholders from PV manufacturing, equipment/materials, policy-making and strategy, capital equipment investment and all interested downstream channels and third-party entities. The goal is simple: to map out PV manufacturing in the U.S. out to 2030 and beyond.
17 June 2025
Napa, USA
PV Tech has been running PV ModuleTech Conferences since 2017. PV ModuleTech USA, on 17-18 June 2025, will be our fourth PV ModulelTech conference dedicated to the U.S. utility scale solar sector. The event will gather the key stakeholders from solar developers, solar asset owners and investors, PV manufacturing, policy-making and and all interested downstream channels and third-party entities. The goal is simple: to map out the PV module supply channels to the U.S. out to 2026 and beyond.

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