Knox Argon 3500 3.5kW 24V Pure Sine Off-Grid Solar Inverter with 500V MPPT

Product Overview

The Knox Argon 3500 (Model: 3.5kW-24-pV4000) represents the highest-capacity unit in the Argon lineup, engineered for heavy-demand residential loads, commercial workshops, and continuous backup environments. Delivering up to 3500W on utility bypass and a robust 3000W continuous output in battery inversion mode, the Argon 3500 powers multiple demanding appliances simultaneously. By retaining an efficient 24VDC battery architecture while accommodating up to 4000W of solar panel input, it provides maximum solar harvesting potential without forcing an upgrade to expensive 48V battery strings. Equipped with an ultra-wide AC input range of 90VAC to 280VAC in appliance mode, the Argon 3500 solves the issue of unstable, sagging grid voltages. It maintains connected loads on mains bypass and continues multi-stage battery charging even when local line voltage drops to levels that would trip conventional inverters into premature battery depletion. Its pure sine wave output and rapid 10ms transfer time guarantee uninterrupted, clean power for sensitive computing gear and heavy inductive motors alike. ## Key Engineering Advantages - High-Capacity 4000W Solar Harvesting: Incorporates a high-voltage MPPT tracker capable of handling a 4000W PV array with an open-circuit voltage ceiling of 500VDC. This allows users to wire 7 to 8 modern high-efficiency panels in a single series string, drastically cutting balance-of-system cabling costs. - Massive 7000VA Surge Capability: Engineered with a 3:1 crest factor, the unit delivers up to 7000VA peak surge headroom. This provides the power required to start heavy inductive motor loads, including 1.5 HP submersible water pumps, deep freezers, and industrial power tools without voltage dips. - Heavy-Duty 100A Solar & 60A AC Hybrid Charging: Features an internal multi-stage CC/CV charger capable of delivering up to 100A from solar and 60A from the utility grid, ensuring large 24V deep-cycle or LiFePO4 battery banks are rapidly recharged between power outages. - Advanced PV Lithium Battery Activation: Eliminates service calls caused by locked lithium battery banks. If an external LiFePO4 pack trips its internal BMS into low-voltage sleep mode, incoming PV solar voltage automatically pulses the terminals to wake the pack up. ## Compatibility & Application - Supported Battery Banks: 24VDC nominal battery systems (Lead-Acid, Tubular, AGM, Gel, and Lithium-ion / LiFePO4 packs). Includes customizable floating voltage (27VDC) and overcharge protection cutoff (32VDC). - Heavy Electrical Loads: Capable of simultaneously operating 1.5 HP water pumps, multiple refrigeration units, microwave ovens, inverter air conditioners within capacity, desktop workstations, and whole-house lighting. - Remote Telemetry: Features an integrated RJ45 data port for connecting optional external Wi-Fi communication modules to monitor real-time metrics via cloud apps. ## Package Contents - 1x Knox Argon 3500 Inverter Unit (3.5kW-24-pV4000) - 1x User Manual & Installation Guide - 1x RJ45 Interface Communication Cable - 1x Wall Mounting Fasteners Pack

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