Growatt ARO Battery Cell | ML33RTA 3.3kWh Battery Cell ｜ Configure for Growatt ARO 9.9kWh and ARO 19.8kWh | Certificate UL 1973 UL9540A
- Flexible capacity options, 3.3kWh - 19.8 kWh for Growatt ARO 9.9~19.8kWh battery storage system.
- Compact size and easy installation
- High energy density and efficiency
- Excellent safety of LiFePO4 battery
See The Specs
The Growatt ML33RTA is a lithium battery cell with a capacity of 3.3kWh, which is for install into Growatt ARO battery cabinet The battery utilises LiFePO4 technology, which offers a range of benefits, including: improved discharge and charging efficiency, longer lifespan, increased safety and lightweight design.
A maximum of 6 x ML33RTA Batteries can be installed in parallel, offering flexible capacity options from 3.3kWh - 19.8 kWh. The unit has a compact design and is easy to install.
The Growatt ML33RTA can config
FEATURES & BENEFITS
- Flexible capacity options, 3.3kWh - 19.8 kWh
- Compact size and easy installation
- High energy density and efficiency
- Excellent safety of LiFePO4 battery
TECHNICAL SPECIFICATION
- Nominal voltage: 51.2V
- Nominal capacity: 3.3kWh
- Usable capacity: 3kWh
- Operating voltage: 48 – 57.6V
- Dimensions: 17.5 x 5.15x 15.5inch (W x D x H)
- Weight: 66lbs
- Protection: IP20
- Parallel connection: Max. 6 packs
Datasheet
Datasheet for ML33RTA
About Growatt
Growatt is a leading global manufacturer of solar inverters, energy storage solutions, and smart energy management systems. Founded in 2010, the company has grown rapidly to become a trusted brand in the renewable energy industry, with a presence in over 100 countries and regions around the world.
Growatt's innovative products are designed to maximize energy efficiency and enable customers to reduce their carbon footprint while saving money on energy bills. The company's range of solar inverters includes both string and central inverters, which are suitable for a wide range of applications, from residential rooftops to large-scale commercial and utility-scale projects.
In addition to solar inverters, Growatt also offers a range of energy storage solutions, including lithium-ion batteries and hybrid inverters. These products allow customers to store excess energy generated by their solar panels and use it when needed, further reducing their reliance on grid power.
With a commitment to innovation and customer service, Growatt is dedicated to providing reliable, high-quality products and solutions that meet the evolving needs of the renewable energy industry.
FAQ
The Growatt ML33RTA is a modular battery unit designed to store electricity generated by solar systems and provide power when needed. It is installed inside the Growatt ARO battery cabinet and works with compatible Growatt hybrid inverters. The battery helps homeowners increase solar self-consumption, reduce grid dependence, and maintain backup power during outages. Its modular design allows users to customize storage capacity based on household energy requirements.
The ML33RTA uses advanced Lithium Iron Phosphate (LiFePO₄) technology, which is widely recognized for safety, durability, and long service life. Compared with other lithium chemistries, LFP batteries offer better thermal stability, lower risk of overheating, and excellent cycle performance. This makes the ML33RTA a reliable choice for residential energy storage systems that require safe operation and consistent performance over many years.
Each ML33RTA module provides 3.3kWh of nominal energy capacity and approximately 3kWh of usable capacity. For larger energy storage needs, multiple modules can be combined together. A maximum of six ML33RTA battery modules can be connected in parallel, allowing storage expansion up to approximately 19.8kWh when configured in a complete ARO battery system.
The ML33RTA is designed for long-term residential use with a cycle life of more than 6,000 charge and discharge cycles under standard test conditions. With proper installation, suitable temperature control, and correct charging settings, the battery can provide many years of reliable energy storage. The built-in BMS helps extend battery lifespan by monitoring cell conditions and preventing damaging operating conditions.
The ML33RTA includes an intelligent Battery Management System that monitors battery voltage, current, temperature, and cell balance. It provides protection against overcharging, over-discharging, overcurrent, overheating, and other abnormal conditions. Combined with the natural safety characteristics of LiFePO₄ chemistry, the ML33RTA delivers a stable and secure energy storage solution suitable for residential solar applications.
Yes. One of the main advantages of the ML33RTA is its modular expansion capability. Homeowners can start with fewer battery modules and add additional units later as their electricity needs increase. This flexible approach allows customers to avoid oversizing their initial system while maintaining the ability to expand storage capacity for additional solar production, higher energy consumption, or longer backup requirements.
Yes. The ML33RTA is specifically designed as the battery module for Growatt ARO battery systems. It integrates with the ARO cabinet and communicates with compatible Growatt hybrid inverters through CAN or RS485 communication. This allows the inverter and battery system to coordinate charging, discharging, state-of-charge monitoring, and protection functions for improved efficiency and reliability.
The Growatt ML33RTA provides a combination of safety, flexibility, and long-term performance. Its LiFePO₄ chemistry, compact modular design, high cycle life, and intelligent BMS make it suitable for modern residential solar energy systems. Whether the goal is reducing electricity bills, increasing solar usage, or preparing for power outages, the ML33RTA offers a scalable and dependable battery solution for North American homeowners.
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