The energy-storage market continues to evolve at record speed, and Growatt has once again positioned itself at the center of innovation. The company’s APX HV US Battery System has been awarded the 2025 Top Products Awardby Solar Power World, earning the elite Best-in-Show distinction for its unmatched scalability, flexible module behavior, and advanced safety architecture.

Now introduced in the US market—and coming soon to Solar&Solar Wholesale—the APX HV US represents a major leap forward for residential and small commercial high-voltage storage.

A New Standard in FLEXIBLE High-Voltage Storage

Growatt’s APX HV US battery modules are engineered for real-world energy needs that change over time. With 5 kWh per module and scalability from 5 kWh up to 30 kWh in a single system , users can start small and expand whenever their lifestyle or energy consumption evolves.

Homeowners can begin with a 10 kWh setup, then add another 10 or even 20 kWh years later—no forced matching, no performance penalties, and no need to replace older modules.

This is possible because each APX HV US module features:

• Module-level energy optimization

• Independent charge/discharge behavior

• Support for mixing new and old modules with different SOC and SOH levels

This level of flexibility is rarely seen in high-voltage systems and was one of the key factors highlighted by this year’s judges.

As Solar Power World judge Will White commented:

“The APX HV US battery has the ability to increase storage capacity at any time during the life of the system, and each battery module can operate at a different state of charge. These features allow systems to adapt to changing family needs and ever-evolving market dynamics.”

Engineered for Safety: LFP Chemistry + Aerosol Fire Suppression

Safety is central to the APX ecosystem. Growatt combines cobalt-free lithium iron phosphate cells (LFP) with a multilayer safety architecture that includes:

• Integrated aerosol fire-suppression system (module level)

• Advanced BMS with optimized software algorithms

• Soft-switching technology for reduced stress and longer component life

• IP66 / NEMA 4X weather-resistant enclosure for indoor or outdoor installation

The battery is also UL9540A, UL1973, FCC, and UN38.3 certified, meeting the most rigorous North American safety requirements.

Technical Highlights from the Datasheet

Battery Performance & Specs

• Nominal energy: 5 kWh per module (usable depending on inverter limits)

• Nominal voltage: 400 V

• Operating voltage range: 330 V–450 V (battery side)

• Battery chemistry: Cobalt-Free LFP

• Nominal capacity: 100 Ah

• DOD: 90%

• Operating temp: –20°C to +50°C / –4°F to 122°F

• IP Rating: IP66 / NEMA 4X for harsh-environment durability

Power Delivery

Depending on configuration (5–30 kWh), the system delivers:

• Nominal power: 2.5 kW up to 12 kW

• Peak output: 3.5 kW–19.2 kW for up to 60 seconds (based on module count)

• Maximum current: 32 A

• Peak current: 42 A (60s)

This ensures fast backup transitions, robust load support, and strong performance even under high-power appliances.

Installation & Structure

• Wall-mounted or floor installation (floor requires battery base)

• Altitude: Up to 4000 m

• Noise: < 40 dB (silent operation)

• Stackable vertical modular design for fast installation

Fully assembled system heights range from 705 mm (10 kWh) to 1590 mm (25 kWh), with the 30 kWh version using a dual-tower configuration .

Reliable, Expandable, Future-Proof Energy Storage

The APX HV US is designed to align with how people actually live and evolve. Whether for whole-home backup, time-of-use shifting, or integrating with photovoltaic and EV charging systems, the APX HV US adapts without forcing expensive upgrades or component replacements.

Its independent module operation and safe, long-life LFP chemistry make it exceptionally compatible with high-voltage hybrid inverters, including Growatt’s XH-US series (MIN 3000–11400TL-XH) .

Coming Soon to Solar&Solar Wholesale

As demand for flexible and future-proof residential high-voltage storage accelerates across Europe and North America, Solar&Solar is expanding its energy-storage lineup with top-performing products like the Growatt APX HV US.

Installers, distributors, and project partners will soon be able to purchase APX HV US through our platform—with expert support, competitive wholesale pricing, and reliable supply for ongoing projects.