Maple Leaf Northern Fox AIO FLEX Hybrid Solar Inverter & Modular Battery Kits | 9.6kW or 11.4kW Inverter | 8kW to 28kW Expandable Energy Storage System | Optional Fox ESS Hub G2 Smart Energy Management

PRE-ORDER SALE - Estimated March 2026 Arrival

Downloads:

Extended Warranty Claim

For Fox AIO Hybrid Inverter:

• PowerQ USER MANUAL
• Certification - UL1741
• Certification - UL9540 - CoFC
  
• Certification - UL9540A Test Report
• Quick Guide

For Fox EQ4000 AIO Battery:

• Datasheet
• UL1973 Certification
• UL9540 Certification
• Quick Guide
• PowerQ USER MANUAL

Fox ESS G2 Hub

• Maple Leaf Northern Fox ESS HUB G2 Datasheet
• CSA Certificate of Compliance
• Generator-Wiring-Method

Bundle Overview:

Fox ESS AIO (All-in-One) Flex inverter & battery kits deliver a complete, future-ready solar energy solution in a single, intelligent platform. By combining high power output, modular lithium battery storage and a smart hybrid inverter, this system empowers homeowners and businesses to take control of their energy, reduce utility costs, and maintain power security, without complexity.

Modular design allows battery capacity to expand from 8kW to 28kW simply by adding additional plug-and-play batteries to the stack. Up to 7 battery modules in total can be used per inverter, but larger systems can also be enabled by linking multiple inverter/battery stacks together.

The optional Fox ESS Hub G2 smart energy management system enhances flexibility in a variety of applications, allowing homeowners to build the perfect whole-home or partial-home backup solution for their needs.

Key Features:

• All-in-One ESS System (Hybrid Inverter + Battery in One Unit) – Simplifies installation and reduces system complexity, giving you lower install costs, a cleaner setup, and higher long-term reliability.

• High Power Output (9.6kW / 11.4kW) – Enough power to run everything in your home for peace-of-mind and reliable operation, even during outages.

• Modular & Scalable Battery Storage – Allows you to add more battery capacity as your needs grow, protecting your investment with a flexible, future-ready system.

• Hybrid Solar Inverter & Backup-Ready Hub Compatibility – Works seamlessly with solar, batteries, and the utility grid, giving you total energy independence and system versatility.

• Optional Fox ESS Hub G2 – Delivers additional functionality for whole-home backup, partial-home backup, and energy management applications.

• Fast Backup Switching (<10ms) – Transfers power almost instantly during grid failure, keeping sensitive electronics running without interruption.

• Smart Energy Management & Monitoring – Provides real-time control via app and web, letting you track production, usage, and savings anytime, anywhere.

• High-Efficiency Lithium Battery Technology – Delivers long cycle life and deep discharge, so you get more usable energy and a higher return on investment.

• Time-of-Use Optimization – Automatically shifts charging and discharging based on electricity rates, reducing your monthly power bills without manual control.
  

Key Features & Specifications of Fox ESS AIO Hybrid Inverter:

• High Efficiency & Dual MPPT – Delivers up to ~97–98% efficiency with dual MPPTs to maximize solar production, so you generate more usable energy and reduce electricity costs.
• High-Voltage LFP Battery Compatibility – Supports high-voltage lithium (LFP) batteries for efficient, safe storage, giving you long battery life and dependable energy availability.
• Emergency Power Supply (EPS) – Automatically provides backup power during outages, keeping critical loads running when the grid fails.
• IP65 Outdoor-Rated Design – Weatherproof, naturally cooled enclosure ensures reliable outdoor operation, reducing installation limits and long-term maintenance.
• Smart Monitoring & Energy Control – Wi-Fi, cloud monitoring, and CT sensor support provide real-time energy insights and export control, so you can optimize usage and meet grid requirements.

Key Features & Specifications of Fox ESS EQ4000 Battery Modules:

• 4kWh High-Voltage LFP Battery – Delivers 3.97 kWh usable energy with safe, long-life daily cycling.

  Universal Fox AIO Compatibility – Fully compatible with Flex, Hub, and Non-Hub Fox AIO inverters.

  Scalable Modular Design – Expands up to 27.80 kWh to match growing energy demands.

  High Efficiency & 90% DoD – Maximizes usable energy for greater savings and longer backup runtime.

  LFP Safety & Longevity – Lithium iron phosphate chemistry ensures thermal stability and extended lifespan.

  Wide Temperature Performance – Operates reliably across residential, commercial, and off-grid environments.

  CAN Communication – Enables precise inverter control and system optimization.

  IP65-Rated Enclosure – Weather-resistant design supports indoor or outdoor installation.

  Plug-and-Play Installation – Fast setup and easy expansion reduce installation time and cost.

  Certified Safety Compliance – UL1973, UL9540/9540A, and UN38.3 certified for safe deployment.

  Specification	Details
  Battery Type	Lithium Iron Phosphate (LFP)
  Usable Energy	3.97 kWh per module
  Scalable Capacity	2–7 modules (up to 27.80 kWh)
  Nominal Voltage	115.2 V
  Depth of Discharge	90%
  Round-Trip Efficiency	>95%
  Max Charge / Discharge Current	50 A (65 A peak)
  Communication	CAN
  Operating Temperature	-10°C to +55°C
  Cooling	Natural convection
  Enclosure Rating	IP65 (indoor/outdoor)
  Certifications	UL1973, UL9540, UL9540A, UN38.3

Key Features & Specifications of Fox ESS Hub G2 (Optional):

• Centralized Energy Management – Manages solar, battery, grid, and generator power for reliable whole-home backup.

• Seamless Grid / Off-Grid Switching – <20 ms transfer ensures uninterrupted power during outages.

• Smart Load Control – Three smart load circuits prioritize critical loads automatically.

• Multi-Inverter Support – Supports up to four Fox inverters for scalable system capacity.

• Generator Compatible – Integrated generator input extends backup runtime.

• Remote Monitoring – FoxCloud US App provides real-time monitoring and control.

• Outdoor-Rated Design – Type 3R enclosure supports indoor or outdoor installation.

• 15-Year Warranty – Extended coverage for long-term system protection.

Comprehensive Warranty & Support:

Warranty: 12.5-year manufacturer warranty +2.5 years extended coverage through Maple Leaf Power Systems - 15yr total warranty on all Fox ESS components.