The ARK low-voltage storage system from Growatt can be used flexibly and expanded as required thanks to its modular concept. A battery tower can be set up with a minimum of 1 to a maximum of 10 ARK high-voltage batteries. A connection cable set is included for commissioning with a compatible inverter. The battery base is also available as an option for ground installation.

The Growatt low-voltage battery system includes:

• Growatt ARK 2.5L-A1 low-voltage battery LifePO4 2.56 kWh (1-10x depending on selection)
• Optional: Battery base ground installation

Compatible inverters

SPA and SPH 1-phase inverters

The Growatt ARK 2.5L low-voltage battery (MPN ARK-2.5L-A1) offers maximum safety thanks to cobalt-free LiFePO4 batteries. The modular, stackable concept allows flexible application for different scenarios and is easy to install. The battery, with the integrated BMS, offers a long service life and excellent performance under high loads. Soft start is used to prevent overvoltage in the system. The ARK low-voltage storage units are only compatible with the single-phase SPH inverter series.

About the ARK 2.5L-A1 battery:

• Modular, stackable battery concept
• Cobalt-free lithium iron phosphate (LFP)
• Wall or floor installation possible
• High cycle stability and long service life
• Soft start to protect the system from overvoltage
• Remote diagnosis and firmware update
• IP65 protection class for outdoor installation
• 10-year guarantee

The ARK battery system

Thanks to its modular concept, the ARK system can be used flexibly and expanded as required. A battery tower can be installed with at least 2 and up to 10 storage modules. A connection cable set is required for connection to the inverter. An additional battery base per tower is required for ground installation. The ARK LV storage systems are compatible with the single-phase SPH inverter series and the SPF3500 off-grid inverter.

Areas of application

• For grid-connected and stand-alone photovoltaic systems
• Emergency power supply
• Uninterruptible power supplies (UPS)

Flexible expansion

The ARK battery system from Growatt offers a high degree of flexibility thanks to its expandable configuration options, which range from 2.56 kWh to 25.6 kWh. Installation and expansion of the system is simple and straightforward thanks to the modular design and the use of cables. Another innovation of the ARK system is that, unlike other battery systems, no battery cabinet is required. Only a battery base is required for a stable stand.

Soft start to protect the system

The soft start mechanism is a protective function that is used with the Growatt battery to protect the system from overvoltage. When the battery is started or switched on, the power supply is gradually increased to protect the system from damage that could be caused by a sudden voltage spike. This ensures smooth and safe operation of the battery system.

Integrated BMS

The Battery Management System (BMS) of the Growatt ARK low-voltage battery monitors a number of important parameters to ensure efficient and safe battery performance. It monitors the battery's state of charge (SOC), mains voltage, current flow, cell voltage and cell and PCBA temperature. By precisely controlling these parameters, the BMS ensures optimal use of the battery, protects against potential damage and extends the service life of the battery.

Long cycle life

The Growatt ARK battery modules are an ideal storage solution for photovoltaic systems due to their extremely long cycle life and the use of LiFePo4 cells. Regardless of whether it is a grid-connected or off-grid system, the Growatt storage system offers numerous advantages compared to conventional lead batteries and other lithium technologies.

Technical data:

• Battery type: Cobalt-free lithium iron phosphate (LiFePo4)
• Energy capacity: 2.56 kWh/50Ah
• Usable capacity: 2.3 kWh/45Ah
• Nominal voltage: 51.2 V
• Operating voltage range: 47.2-56.8 V
• Charging/discharging current: 25A
• Protection class: IP65
• Operating temperature range: -10°C - +50°C
• Dimensions: 650 x 260 x 185 mm
• Weight: 28 kg
• Certificates: IEC62619, CE, CEC, RCM, UN38.3