Knox Argon VM II 3500 – Off-Grid Inverter with Charger (Argon Series, Battery Independent)

The Knox Argon VM II 3500 is an advanced off-grid solar inverter that combines efficiency, durability, and user-friendly design. Part of Knox’s Argon series, this model is specially built for flexible energy management with or without a battery, making it ideal for modern off-grid solar systems.

Engineered with a pure sine wave output, the inverter ensures stable power delivery, protecting sensitive appliances and electronics. Its wide PV input range allows compatibility with various solar panel configurations, while the maximum charging current of 100A provides efficient charging performance. The reserved communication port for BMS integration adds an extra layer of reliability and adaptability.

Key Features & Benefits

Pure sine wave output ensures stable and clean power suitable for sensitive electronics like computers, medical devices, and home appliances.

Battery-independent design allows the system to operate even without a battery connected, giving installation freedom and reducing up-front cost.

Wide PV input / MPPT range accommodates various solar panel strings and configurations, which gives flexibility in system design.

High charging capability with up to 100 A charging current for fast and efficient energy storage when batteries are used.

Built-in anti-dust kit helps protect internal modules in dusty or harsh environments, improving reliability and reducing maintenance.

Reserved communication port (for BMS or external control) enhances monitoring and integration into larger energy systems.

Battery equalization function helps maintain battery health by periodically balancing cell voltages, thereby extending battery lifecycle.

Rugged operating range (–10 °C to 50 °C) means the inverter works reliably under varied environmental conditions.

Technical Specifications of VM II 3500:

Ideal Use Cases

Remote homes or off-grid dwellings where grid power is unavailable or unreliable

Microgrids or isolated cabins where power management flexibility is key

Backup power systems that require both solar input and optional battery support

Phased solar installations where battery storage might be added later

Why Choose the Knox Argon VM II 3500?

Knox’s Argon series is built for installers and end-users who demand reliability, ease-of-installation, and future-proof flexibility. The VM II 3500 stands out by letting you start with minimal components (even without a battery) and scale up as your needs grow, without replacing the core inverter. It’s a strong contender for any system seeking efficient, clean power from solar and robust integration for system expansion.