Huawei LUNA2000-7-S1 LiFePO4 7 kWh HV Battery (BMS)

It is a large battery for the home, which keeps the energy produced by the panels during the day so that you can use it in the evening, at night or when the power goes down. It looks like a compact metal cabinet, it stands on the floor, indoors or outdoors, and it has no fans: it cools itself, through the natural circulation of air, so it operates quietly. The cells are LiFePO4 (lithium iron phosphate), a chemistry chosen for thermal stability and long service life. The battery works together with a Huawei SUN2000 inverter, which decides when it charges and when it discharges.

The 6.9 usable kWh cover the evening and night consumption of an ordinary home: fridge, lighting, television, network equipment and a few appliances. The power of 7 kW both on charging and on discharging means the battery can support several large loads at once; as a guideline, at a constant consumption of 1 kW the reserve of 6.9 kWh lasts around 7 hours. The cabinet takes up little room, 590 x 255 x 510 mm, but weighs about 80 kg including the floor fixing kit, so it needs a solid floor. If your consumption grows, you can add modules and reach 14 kWh or 21 kWh, and in large houses up to 4 systems can work in parallel. Maintenance is minimal, with no filters or fans to clean, and the state of charge is monitored from the FusionSolar platform.

The voltage range in operation is 350-560 V for single-phase installations and 600-980 V for three-phase installations, depending on the associated SUN2000 inverter. The S1 series works at a power/energy ratio of approximately 1C, hence the 7 kW of charging and discharging on the 6.9 kWh unit. RS485, FE and CAN communication, monitoring in FusionSolar. IP66 enclosure, natural convection cooling, -20...+55 degrees C, relative humidity 5-95%, maximum altitude 4000 m with derating above 2000 m; 10-year warranty.

Who it suits

Suitable for a house that already has or is about to have a Huawei SUN2000 inverter and wants to cover the evening and night consumption, with the option of later extending to 14 or 21 kWh.

Terms explained

• LiFePO4 (lithium iron phosphate): The chemistry type used in the battery cells, chosen because it heats up little and withstands very many charging and discharging cycles.
• Usable kWh: The energy you can actually take out of the battery in normal use, not the total capacity written on the label.
• IP66: A sealing code: the first digit shows the protection against dust (6 means completely shielded), the second against water (6 means powerful jets), so the unit can stay outdoors.

Technical specifications

Recommended applications

• High-power residential storage with Huawei SUN2000 inverters
• Fast backup for loads with high power peaks
• Outdoor installations, in low-temperature conditions
• Systems expandable in steps of 7 kWh

Warranty

10 years

Technical details

Specifications confirmed from the manufacturer's datasheet

Huawei LUNA2000-7-S1 is the basic configuration of the S1 generation of the Smart String ESS system. The cells are LiFePO4, and the usable energy is 6.9 kWh. Compared with the previous generation, the S1 series allows a power/energy ratio of approximately 1C, so that the maximum charging and discharging power is 7 kW.

The voltage range in operation is 350 - 560 V for single-phase installations and 600 - 980 V for three-phase installations, depending on the SUN2000 inverter it works with. Communication is done through RS485, FE and CAN, and monitoring is done in the FusionSolar platform.

The cabinet has an IP66 protection rating and natural convection cooling, without fans. The operating temperature range is -20...+55 degrees C, with relative humidity 5 - 95% and a maximum altitude of 4000 m, with derating above 2000 m.

The dimensions of the 7 kWh unit are 590 x 255 x 510 mm, and the weight is about 80 kg, including the floor fixing kit. The system can be expanded by adding modules to 14 kWh or 21 kWh, and up to 4 systems can work in parallel.