Existing system
ARO 9.9kWh battery
A complete legacy high-voltage battery path for a verified compatible Growatt MIN XH-US installation.
- Three 3.3kWh cells
- Matched primary cabinet
- Confirm inverter and firmware
Growatt energy storage
Growatt ARO High-Voltage Battery Systems
Shop Growatt ARO high-voltage LFP battery systems, ML33RTA 3.3kWh cells and primary or secondary battery cabinets for compatible Growatt MIN XH-US inverters. ARO is Growatt's previous-generation high-voltage platform; use this collection for an existing ARO system, a verified expansion or matched replacement components.
Legacy HVPrevious-generation Growatt high-voltage battery platform.
9.9 / 19.8kWhCommon complete ARO system capacities.
MIN XH-USUse only with a verified compatible inverter and firmware.
3.3kWh cellsML33RTA cells install in matched ARO cabinets.
Choose the right system path
Select by application first. Final equipment, firmware, protection and code requirements must be confirmed for the exact project.
Capacity expansion
ARO 19.8kWh system
Expand a supported ARO installation with matched primary and secondary equipment rather than mixing battery platforms.
- 19.8kWh complete option
- Matched secondary system
- Site-specific verification
Replacement cell
ML33RTA 3.3kWh cell
For service or expansion of a confirmed ARO cabinet. Match the cell model, battery state and commissioning requirements.
- 3.3kWh LFP cell
- ARO cabinet use
- Installer commissioning
Battery enclosure
Primary & secondary cabinets
Use the correct cabinet role and controls for the planned ARO architecture.
- Primary cabinet
- Secondary cabinet
- Three-cell cabinet format
Shop Growatt ARO High-Voltage Batteries & Components
Choose a product family to compare the most relevant batteries, inverters, kits and accessories.
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Growatt ARO 9.9kWh LFP High Voltage Battery System | Compatible with Growatt MIN Series Grid-Tied Inverter | UL9540 Certified and CEC Listed | 10-Year Warranty
$3,750.00
The Growatt 9.9 KWh ARO LiFePO4 high voltage Battery with its advanced LiFePO4 chemistry, delivers a longer lifespan and enhanced safety compared to traditional battery technologies. Its high voltage capacity also...
Growatt ARO 19.8kWh LFP High Voltage Battery System | Compatible with Growatt MIN-XH-US Series Grid-Tied Inverter | UL9540 and UL1973 Certified | CEC Listed | 10-Year Warranty
$6,850.00
The Growatt ARO 19.8kWh LiFePO4 high voltage Battery (2 pcs 9.9kWh )with its advanced LiFePO4 chemistry, delivers a longer lifespan and enhanced safety compared to traditional battery technologies. Its high voltage...
Growatt ARO 9.9kWh LFP High Voltage Secondary Battery System | Expansion System to 19.8kWh | Compatible with Growatt MIN Series Grid-Tied Inverter | UL9540 Certified
$3,650.00
The Growatt 9.9 KWh ARO LiFePO4 high voltage Secondary battery system is a expansion kit for ARO 9.9kWh primary battery system, with a ARO Secondary cabinet and 3 pcs 3.3kWh battery...
Growatt ARO Battery Cell | ML33RTA 3.3kWh Battery Cell ｜ Configure for Growatt ARO 9.9kWh and ARO 19.8kWh | Certificate UL 1973 UL9540A
$899.00
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...
Growatt ARO HV Battery Secondary Cabinet for 3 battery modules | Cabinet for ML33RTA 3.3kWh Battery Cell
$1,295.00
The Growatt ARO battery system secondary cabinet is pre-assembled cabinet for 3 ML33RTA 3.3kWh battery cell. It can parallel connect with the ARO primary battery cabinet with power cable and...
Growatt ARO HV Battery Primary Cabinet for 3 battery modules | Cabinet for ML33RTA 3.3kWh Battery Cell
$1,559.00
The Growatt ARO battery system primary cabinet is pre-assembled cabinet, it can install 3 PCS ML33RTA 3.3kWh battery cell. It can parallel connect with the ARO secondary battery cabinet with...
Compare Growatt ARO battery components
ARO is Growatt's previous-generation high-voltage battery platform for compatible MIN XH-US inverters. Match every cell, cabinet and control component to the existing ARO system before ordering.
| Product path | Configuration | Use it when | Compatibility note |
|---|---|---|---|
| ARO 9.9kWh system | Three ML33RTA 3.3kWh cells with the required primary cabinet and controls | Building or replacing a verified 9.9kWh ARO system | Confirm the exact MIN XH-US inverter, firmware and listed combination |
| ARO 19.8kWh system | Matched primary and secondary ARO equipment totaling 19.8kWh | Adding runtime to a supported ARO installation | Do not substitute APX modules or APX power equipment |
| ML33RTA battery cell | 3.3kWh LFP high-voltage battery cell | Servicing or expanding a confirmed ARO cabinet | New and existing cells must meet Growatt commissioning requirements |
| Primary / secondary cabinet | Three-cell cabinet selected for its assigned system role | Replacing an enclosure or completing an approved expansion | Primary and secondary cabinets are not interchangeable |
Legacy-platform notice: ARO and APX are different high-voltage battery generations. Do not mix ARO cells or cabinets with APX modules, bases or power modules. Send Self2Solar the inverter and battery serial numbers before purchasing expansion parts.
Growatt ARO battery FAQ
What is the Growatt ARO battery system?
ARO is Growatt's previous-generation modular high-voltage LFP battery platform. It pairs with specific compatible Growatt MIN XH-US inverters and uses ML33RTA 3.3kWh cells installed in matched ARO cabinets.
Is ARO the same as the newer APX battery?
No. ARO and APX are separate high-voltage battery generations with different cells, cabinets, controls and installation requirements. Their components must not be mixed.
Which inverter works with Growatt ARO batteries?
ARO works with specific compatible Growatt MIN XH-US inverter models and firmware. Compatibility depends on the exact inverter version and system listing, so verify the model and serial number before ordering.
What capacities are available for ARO systems?
The complete ARO systems in this collection are commonly configured at 9.9kWh and 19.8kWh using 3.3kWh ML33RTA cells and the correct primary or secondary cabinet architecture.
Can I expand an existing 9.9kWh ARO battery?
A supported ARO system may be expanded with matched secondary equipment. Confirm the existing cabinet, cell model, inverter firmware, battery state and current Growatt expansion procedure before adding capacity.
What is the difference between an ARO primary and secondary cabinet?
The primary cabinet contains the controls required for the main battery unit, while the secondary cabinet is used for an approved expansion. Order the cabinet assigned to the exact system role.
Can I replace one ML33RTA battery cell?
Replacement is possible only when Growatt's service and commissioning requirements are met. Cell state, age, voltage, firmware and cabinet configuration should be checked by a qualified installer.
Should a new system use ARO or APX?
APX is Growatt's current modular high-voltage platform and is generally the starting point for a new compatible system. Choose ARO products primarily to support an existing verified ARO installation.
