Seller: Smart Edge Robotics is an independent online retailer.
Condition: New unless the product page clearly states otherwise.
Availability: Product availability can change. Review the status shown on this page and any message sent after checkout.
Delivery: Review the shipping estimate shown on the product page or at checkout before completing payment.
Cancellation: Request cancellation before processing begins. Orders already in processing or fulfillment may not be cancelable.
Returns: Review the refund policy before purchase. Restrictions and fees can apply by brand, product condition, and return reason.
Couldn't load pickup availability
Payment methods
Fortress Power Envy Duo 21 16kW Whole Home Solar Hybrid Inverter
The Fortress Power Envy Duo 21 is designed to meet your energy needs with unparalleled power and flexibility, making it ideal for both residential and commercial solar applications. This advanced hybrid inverter operates with efficiency and reliability, ensuring that you have access to continuous energy whether on-grid, off-grid, or in a hybrid setup.
Benefits
Experience uninterrupted energy supply even during outages.
Maximize your energy collection from solar panels, enhancing energy savings.
Enjoy a user-friendly operation and simplified system wiring.
Feel secure knowing your energy system is built with advanced safety features.
Features
Supports up to 16 kW continuous output on-grid and 12 kW off-grid.
Compatible with a solar PV array of up to 21 kW for maximum energy collection.
Seamlessly integrates a 200A transfer switch for whole-home backup during outages.
Versatile voltage compatibility for different phases of operation.
With an IP65 rated enclosure, this inverter is prepared for outdoor installation.
Pre-configured with safety breakers for easy installation.
Includes a rapid shutdown transmitter for compliance with electrical codes.
Many components are pre-integrated to streamline the installation process.
Specifications
Model: Envy Duo 21-US (16 kW)
PV Maximum: 25,000 W / Recommended: 21,000 W
MPPTs: 3 / Inputs per MPPT: 2:2:1
DC Voltage Range: 100–550 Vdc / MPPT Range: 120–440 Vdc
Start Voltage: 100 Vdc / MPPT Nominal: 360 Vdc
Max Usable Input Current: 26A / 26A / 15A
Max Short-Circuit Current: 31A / 31A / 19A
Nominal Output: 120/240V or 120/208V
Continuous Power: 12,000 VA / Peak Power: 2× Pn for 0.5 s
Switching Time: <20 ms
Efficiency: PV to Grid 97.5% / Battery to Grid 94%
Battery Nominal: 48 V / Range: 40–60 V
Dimensions: 22.3 x 35.2 x 11.2 in
Weight: 125.71 lb
Cooling: Smart cooling fans
Operating Temperature: -25 °C to +60 °C
Altitude: < 6561 ft (2000 m) / Humidity: 0–100% RH
Display: Touch color screen with communication options
Preorder and backorder products display a current expected dispatch date. Availability, processing time, shipment origin, carrier, cost, and transit estimate can otherwise vary by product.
Warranty terms are product-specific. Manufacturer or supplier coverage applies only when clearly stated and may require registration or direct service.
Confirm compatibility, included components, power requirements, installation, licensing, regulatory, software, safety, and operational requirements before purchase.
An independent online retail brand operated by SAMUELHYBRID ECOMMERCE LLC. We do not claim to be the manufacturer, official brand website, authorized dealer, or exclusive distributor unless a verifiable relationship is expressly stated.