Growatt apx 20kWh battery system with back-up box and bms p2 for mod-xh BP inverters

The modular concept of the Growatt apx battery system enables a wide range of applications and flexible expansion as required. Between 1 and 6 high-voltage batteries can be installed within a battery tower. The battery module is a high-voltage battery that features the latest LiFePO4 technology and boasts a nominal energy of 5kWh. The body also includes a battery management system of the latest generation, which protects the battery modules from adverse conditions, and a battery base that ensures a secure stand during ground installation. As an option, a back-up box can be added for emergency power generation. It is able to provide up to 10kWh from the solar storage system in the event of a power failure.

The apx battery system contains:

• apx 5.0p-b1 high-voltage battery 5kWh LiFePO4 (1-6x depending on selection)
• apx 98034-p2 power module bms
• apx battery base High-voltage battery
• Optional: syn 50 xh 30 Back-Up Box emergency backup power

The apx battery system demonstrates its flexible configuration options. These can be extended from 5kWh to 30kWh. The simple design makes installation and expansion very straightforward with the help of cables. A further advance of the new storage system is that, unlike other systems, a battery cabinet is no longer required. Only the corresponding battery base is required for a secure stand. The apx series supports the combination of mixed battery packs from new and old batches, as well as different capacities.

apx 5.0p-b1 high-voltage battery

The apx 5.0p-b1 battery module from Growatt is a high-voltage battery with proven lithium iron phosphate storage technology. The LiFePO4 batteries are characterized by a long service life and a high level of safety, even at high power. In addition, the modular energy optimization ensures that the system fully utilizes the energy of each battery. In order to achieve a very flexible system application, old and new battery batches as well as batteries with different capacities can be mixed and connected. Soft start is used to avoid overvoltage in the system.

The apx high-voltage battery:

• Flexible capacity options up to 30kWh
• Cobalt-free LiFePO4 storage technology
• 90% depth of discharge (DoD)
• Active protection at bms level
• Integrated modular energy optimization
• Supports the combination of new and old battery modules in one system
• Soft start to avoid overvoltages in the system
• Modular and stackable design
• Easy installation
• 10-year manufacturer's warranty

Long cycle life

The apx battery system relies on LiFePO4 chemistry without cobalt and offers a four-stage protection mechanism through a battery management system (bms), modular energy optimization, a fuse and aerosol. This ensures increased safety, reliability and a long service life. The modular energy optimization ensures that the system fully utilizes the energy of each individual battery. Regardless of whether the solar system is grid-connected or stand-alone, Growatt storage offers several advantages over typical lead-acid batteries and other lithium technologies.

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.

Technical data:

• Battery type: Lithium iron phosphate (LiFePo4)
• Nominal voltage: 385V
• Nominal energy: 5kWh
• Operating voltage range: 330-450V
• Weight: 50kg
• Dimensions: 690 x 185 x 295 mm
• Protection class: IP66
• Ambient temperature: -10°C - +50°C
• Cooling: Natural convection
• Warranty: 10 year manufacturer's warranty

Battery management system

The new Growatt apx 98034-p2 battery management system (MPN 98034-p2) is a control unit of the latest generation that protects each apx battery module from adverse conditions and ensures safe and trouble-free continuous operation. It does not matter how many modules are in operation at the same time. What is important is that one bms is always used per tower. A tower consists of a minimum of 1 to a maximum of 6 Growatt apx 5.0p-b1 5kWh high-voltage battery modules, which can result in a storage capacity of 5-30 kWh.

Monitoring parameters

• SOC
• System voltage
• System current
• Cell voltage
• Cell temperature
• PCBA temperature

Technical data:

• Dimensions: 690 x 185 x 295 mm
• Weight: 15kg
• Max. Current: 30A
• Peak current: 34a, 60s
• Communication: RS485/CAN

Battery base

The Growatt apx Battery Base is suitable for the floor installation of Growatt apx battery modules and the associated bms. It ensures that the battery tower stands securely. The Growatt apx system has a modular design, i.e. several batteries can be combined, with the Growatt Base serving as the foundation. Up to 10 storage modules and the associated bms can be stacked on one base.

• for floor mounting of Growatt apx batteries and associated bms
• one base per battery tower
• Dimensions: 690 x 185 x 50 mm

syn 50-xh-30 Back-UP Box

The syn 50-xh-30 from Growatt is a back-up box that acts as an emergency backup power supply for the home. It is able to provide up to 10kW from the solar storage system in the event of a power failure. The switchover time is 0.5 seconds. The Back-Up Box is characterized by a user-friendly design, which enables uncomplicated installation and operation.

The syn Back-Up Box:

• Backup power supply for the entire house, up to 10 kW
• 100% 3-phase asymmetrical output
• Integrated switch
• Easy to install
• Combination options with the entire Growatt MOD-xh BP series

Technical data:

• Max. Overcurrent protection AC input: 63 A
• Max. Continuous input current: 50 A
• AC output voltage: 230 v/400 V
• AC output voltage range: 180-280 V
• AC frequency: 50/60 Hz
• AC frequency range: 45-65 Hz
• AC rated power: 18 kW
• Max. continuous input current at 230v: 26.1 A
• Peak AC power in backup mode: 19.8k W
• AC peak current in backup mode: 28.7 A
• Communication: RS485
• Operating temperature range: -40°C - +60°C
• Protection class: IP65
• Weight: 10.8 kg
• Dimensions: 365 x 450 x 123 mm

Compatible inverters

The following hybrid inverters are intended for the storage system:

• MOD 3KTL3-xh BP
• MOD 4KTL3-xh BP
• MOD 5KTL3-xh BP
• MOD 6KTL3-xh BP
• MOD 7KTL3-xh BP
• MOD 8KTL3-xh BP
• MOD 9KTL3-xh BP
• MOD 10KTL3-xh BP