Fortress Power 19.2kWh Energy Storage Kit: Envy Duo 21 | 16kW Peak / 12kW Continuous + eForce 19.2 kWh + Free Guardian -Bundle

MPNs: Envy Duo 21-US (16KW) / eForce-19.2 / Guardian

Save $1450 with bundling and free ship.

This Kit Includes

• • (1) Fortress Power Envy Duo 21 Hybrid Inverter
    MPN: Envy Duo 21-US (16KW)
  • (2) Fortress Power eForce 9.6kWh Battery Modules
    (Total: 19.2kWh / 400Ah System Capacity)
  • (1) Fortress Power eForce eWay + Base (Battery Combiner & Mounting System)
    (Includes battery combiner, battery cables, integrated wire management, and floor mount base)
  • (1) Fortress Power Guardian Monitoring & Control Device (Free)
    MPN: Guardian

Built for Whole-Home Power and Expansion

This Fortress Power bundle is built for homeowners and installers looking for a high-capacity, all-in-one storage solution with advanced system control. Pairing the Envy Duo 21 hybrid inverter with the powerful eForce 19.2kWh battery delivers a robust system capable of handling whole-home backup, load shifting, and energy independence.

The included Guardian device enhances system visibility and control, providing advanced monitoring and communication across the system. Designed for flexibility, this setup supports both 240V split-phase and 208V three-phase applications, making it a strong fit for residential and light commercial installations.

Key Benefits

• 19.2kWh Battery Storage – High-capacity storage for extended backup runtime
• 16kW Peak / 12kW Continuous Output – Supports whole-home loads and high-demand appliances
• Up to 25kW PV Input – Maximize solar production and system efficiency
• Integrated System Controls – Guardian enables advanced monitoring and system management
• Scalable System Design – Expandable for future energy needs
• Built-In Breakers + RSD Transmitter – Simplifies installation and code compliance
• Flexible Voltage Compatibility – Works with 240V split-phase and 208V three-phase

System Output & Storage

• Peak Output: 16kW
• Continuous Output: 12kW
• Battery Storage: 19.2kWh

Best Applications

• Whole-home backup power systems
• Grid-tied solar with battery storage
• High-consumption households
• Energy cost reduction through peak shaving
• Light commercial applications
• Systems requiring advanced monitoring and control

Free Fortress Power Guardian Monitoring & Control Device

The included Fortress Power Guardian is a powerful gateway that connects your battery system to the cloud, unlocking real-time monitoring, remote management, and faster technical support. Once installed, it automatically detects connected Fortress batteries and provides detailed system data—including state of charge, voltage, current, and temperature—directly through a mobile app.

With Wi-Fi connectivity and remote firmware updates, the Guardian allows installers and homeowners to manage and optimize system performance from anywhere without needing on-site service. It also enables streamlined warranty registration, live technical support access, and secure data sharing with Fortress engineers—making troubleshooting faster and more accurate.

Product Specifications

Warranty

• Inverter Warranty: 10 Years
• Battery Warranty: 10 Years
• Guardian: Manufacturer standard warranty

About Fortress Power

Fortress Power is a leading provider of advanced energy storage solutions, known for high-performance lithium batteries and integrated system design. Their products are engineered for reliability, scalability, and installer-friendly deployment across residential and commercial applications.

Need Help Designing Your System?

Need help with system sizing, compatibility, or a full solar + storage design? Our experts can create a permit-ready, install-ready plan tailored to your project.

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