Growatt Retrofit Kit 10.24kWh ARK SPH 10000TL3 BH-UP Hybrid Inverter LiFePO4 Storage

The Growatt battery retrofit kit is ideal for expanding your existing solar system. The system includes (depending on your selection) 3–10 ARK 2.5H-A1 modular, stackable high-voltage batteries, each with a nominal voltage of 51.2 V and featuring a modern LiFePO4 battery technology. The included HVC 60050-C2 BMS control unit and floor-mounted battery base complete the tower. In addition, the set includes a 3-phase SPH 10000TL3 BH-UP hybrid inverter. A battery connection cable set is included to establish a connection between the battery tower and the inverter.

Important Note —According to Growatt, retroactive expansion is only permitted within the first three months after commissioning and following prior inspection by Growatt. After more than three months of operation, the existing battery capacity should not be expanded. Please take your future storage needs into account when selecting the set.

Installation Note: For this non-plug-and-play device or component, connection and installation may only be performed by a qualified electrician. Please follow the user manual!

• Modular, stackable battery concept
• 100% three-phase asymmetric output
• Intelligent phase-level power control
• UPS function with 10 ms switchover time
• VPP interface

The retrofit kit includes:

• 3–10 Growatt ARK 2.5H-A1 high-voltage LiFePO4 batteries, 2.56 kWh each (depending on selection)
• 1x Growatt SPH 10000TL3 BH-UP 10 kW 3-phase hybrid inverter
• 1x Growatt HVC 60050-C2 ARK BMS control unit for SPH and SPA inverters, including base and cable set

Growatt ARK 2.5H-A1 High-Voltage Battery

The Growatt ARK 2.5H-A1 high-voltage battery (MPN ARK-2.5H-A1) is a LiFePO4 storage unit with high cycle stability and a long service life. Its modular, stackable design allows for flexible use in various scenarios and is easy to install. The battery delivers outstanding performance under heavy loads and, with its IP65 rating, is also suitable for outdoor installation. A soft-start feature is used to prevent overvoltage in the system.

About the ARK 2.5H-A1 battery:

• Modular, stackable battery design
• Cobalt-free lithium iron phosphate (LFP)
• High cycle stability and long service life
• Wall- or floor-mounted installation possible
• Soft start to protect the system from overvoltage
• Automatic wake-up in case of undervoltage
• IP65 protection rating for outdoor installation
• Remote diagnostics and firmware updates
• Battery base and battery connection kit included in the retrofit kit

The ARK Battery System

Thanks to its modular design, the ARK system is flexible and can be expanded as needed. A battery tower can be configured with a minimum of 2 and up to 10 storage modules; multiple towers can also be installed within a single system. Operation requires one BMS control unit per tower, as well as a connection cable set to the corresponding inverter. For ground installation, an additional battery base is required per tower. The ARK high-voltage storage systems are compatible with the MIN and MOD-XH inverters, as well as the three-phase SPH and SPA inverters. Depending on the inverter series, a different control unit, a different set of connection cables, and a different initial number of batteries are required. The ARK-XH system starts with 2 batteries, while the ARK-HV system starts with 3.

Soft start to protect the system: The soft-start mechanism is a protective feature used in the Growatt battery to protect the system from overvoltage. When the battery is started or powered on, the current 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.
High Cycle Life: Thanks to their extremely high cycle life and the use of LiFePo4 cells, Growatt ARK battery modules are an ideal storage solution for photovoltaic systems. Whether in a grid-connected or off-grid system, Growatt storage offers numerous advantages over conventional lead-acid batteries and other lithium technologies.

Technical Specifications:

• Battery Type: Cobalt-free lithium iron phosphate (LiFePo4)
• Energy capacity: 2.56 kWh
• Usable capacity: 2.3 kWh
• Nominal voltage: 51.2 V
• Operating voltage range: 47.2–56.8 V
• Charge/discharge current: 25 A/0.5 C
• Protection rating: IP65
• Temperature range: -10–50°C
• Dimensions: 650 x 260 x 180 mm
• Weight: approx. 28 kg
• Certifications: IEC 62619, CE, CEC, RCM, UN 38.3

BMS Control Unit HVC 60050-C2

The Growatt HVC-60050-C2 BMS is a central monitoring and control unit that is part of the ARK HV high-voltage battery system and supports communication with the Growatt SPA and SPH inverters. Up to 10 battery modules, each with a capacity of 2.56 kWh, can be connected to this BMS. These modules can be connected in series to form a battery tower with a total capacity of up to 25.64 kWh. Control parameters include state of charge (SOC), grid voltage, current, cell voltage, cell temperature, and PCBA temperature measurement. By precisely monitoring these parameters, the BMS ensures optimal battery performance and longevity.

Technical Specifications:

• Input/output voltage range: 90–585 V
• Rated current: 25 A
• Protection rating: IP65
• Temperature range: -10–50°C
• Dimensions: 650 x 260 x 185 mm
• Communication: CAN
• Weight: 8.5 kg

Growatt SPH 10000TL3 BH-UP Hybrid Inverter

The Growatt SPH 10000TL3 BH-UP Hybrid Inverter is a state-of-the-art solution for solar projects. With intelligent load management, a wide battery voltage range of 100–550 V, and a VPP interface, it offers flexibility and efficiency. The inverter supports solar systems with a total output of up to 15 kW and ensures an uninterrupted power supply. With these features, the SPH10kTL3 BH-UP is the ideal solution for flexible and reliable solar systems.

About the SPH 10000TL3 BH-UP Inverter

• 100% three-phase asymmetric output
• Intelligent phase-level power control
• Wide battery voltage range: 100–550 V
• UPS function with a 10 ms switchover time
• VPP interface
• Scalable system configuration
• DC/AC Type II SPD
• DC/AC ratio up to 1.5
• Two MPP (Maximum Power Point) trackers
• Supports lithium and lead-acid batteries
• Intelligent load control via dry contact

Hybrid Inverter

Unlike conventional inverters, hybrid inverters offer the ability to not only feed the generated solar power into the grid but also store it in batteries. This allows the stored solar power to be used even when the sun isn’t shining. Another feature of hybrid inverters is that they optimize a household’s electricity consumption by prioritizing the direct use of generated solar power within the household before feeding it into the grid. This leads to lower energy costs and reduced dependence on expensive grid electricity.

Operating Modes – Configurable Depending on System Requirements

Online Mode: Different operating modes can be set to ensure optimal system integration of the SPH inverter. When configured directly on the device, a priority mode can only be set for a single time period. When using the online platform, up to three time periods can be set for the priority mode (a paid accessory is required to use this feature).

• Load first:In the standard “Load first” mode, the connected loads (consumers) are supplied with power first. As soon as the PV energy is sufficient for the load, the excess energy is fed into the battery. If the battery is fully charged or none is connected, the remaining energy is fed into the grid.
• Battery first:In this mode, the inverter first fully charges the battery using the maximum possible solar power. If the PV power is insufficient, the grid charging function can also be activated.
• Grid first:In this mode, the generated PV energy is first fed into the grid. Here, you can set the mode’s activation and deactivation times, as well as the power rate.

Backup Mode: If no grid voltage is present at the device—e.g., due to a brief power outage or blackout—the Growatt SPH automatically switches to backup mode. This ensures power is supplied to the AC output via the EPS-LOAD connection. The required power is supplied solely by the solar system and the battery. If the PV system also fails, the battery maintains the AC supply until it is fully discharged. If necessary, the automatic switch to this mode can also be disabled.

Maximum Power Point Tracking

By using Maximum Power Point Tracking (MPPT) technology, a solar system can achieve optimal output. The MIC inverter is equipped with an MPPT that adjusts the optimal ratio of voltage to current throughout the day based on solar irradiance and the temperature of the solar modules. With its wide MPPT voltage range, many solar modules can be connected, enabling efficient energy generation. This advantage is particularly evident when the sky is partly cloudy and light intensity changes continuously.

Smart Load Management

The inverter’s integrated smart load control enables precise and efficient management of energy consumption. By using a dry contact, electrical loads can be controlled intelligently and prioritized. This feature allows for automatic detection of energy demand and optimal utilization of available energy. Smart load management ensures optimal energy distribution and thus contributes to efficient use. With smart load control via the dry contact, the inverter is able to optimize the energy flow and ensure efficient operation of your solar system.

Growatt Monitoring Platform

By using the optional Shine Series accessories, you can access the Growatt Monitoring Platform. This platform is available both as a smartphone app for iOS and Android and as a web version. The Shine accessories must be purchased separately, but use of the platform is free of charge. Through Shine, you can configure and monitor all your Growatt products, and it also allows you to view your self-consumption and track trends.

The following Shine options are compatible with the SPH Series:

• ShineWiFi-X
• ShineLink-X
• Shine4G-X
• ShineMaster

Technical Specifications

• Recommended module power: up to 15 kW
• Max. DC voltage: 1000 V
• Start-up voltage: 120 V
• MPPT voltage range: 120–1,000 V/600 V
• Battery voltage range: 100–550 V
• Max. charge/discharge current: 25 A
• Continuous charge/discharge power: 10 kW
• AC rated power: 10 kW
• Max. Apparent power: 10 kVA
• Max. AC output power: 10 kW
• Max. output current: 15.2 A
• AC rated voltage range: 230/400 V (310–476 V)
• AC power frequency range: 50/60 Hz (45 Hz–55 Hz/55 Hz–65 Hz)
• Enclosure rating: IP65
• Maximum efficiency of 98.2%
• Dimensions: 505 x 453 x 198 mm
• Weight: 30 kg