Envy Duo 21 + eBoost 16kWh Bundle

The Fortress Power Envy Duo 21 + eBoost bundle pairs a high-capacity 48V hybrid inverter with modular LFP battery storage for residential and light commercial solar + backup. With 3 MPPTs, up to 25kW PV input, and scalable storage (up to 16 eBoost units), it’s built for clean DIY installs today—and easy expansion tomorrow.

Key Features & Benefits:

• High-capacity hybrid inverter: 48V system with 12kW continuous backup output and up to 16kW max export with PV

• Large solar input support: accepts up to 25kW PV array power with 3 MPPTs (inputs per MPPT: 2:2:1)

• Dual-phase compatibility: supports 240V split-phase and 208V three-phase applications

• Expandable power: parallel up to 10 inverters (up to 120kW total output)

• Fast, code-friendly protection: integrated AC/DC breakers + rapid shutdown transmitter

• DIY-friendly, clean wiring: integrate battery + inverter via eWay wireway / conduit box for organized AC/DC routing

• Scalable storage: 16kWh per eBoost unit, expandable up to 16 units (up to ~256kWh nominal)

• All-weather battery design: IP65 enclosure + internal heating elements for extreme conditions

• Smart monitoring & updates: mobile app monitoring + remote firmware updates (inverter)

• Safety + certifications (inverter & battery): see “Specs in a Glance” for listed standards

Why It’s DIY-Friendly

• Simple installation: connect eBoost + Envy Duo 21 using the eWay conduit/wireway system (with wall or floor mounting options)

• Clean wiring: AC/DC line separation inside the wireway for organized routing

• Built-in safety: battery/load breakers in the inverter + battery safety features reduce external components

• Expandable design: add more eBoost batteries in parallel as your storage needs grow

• Flexible inputs: 3 independent MPPTs + grid and generator inputs support varied energy sources

• Smart setup: adjust settings and manage firmware with the app/Guardian tools

Specs in a Glance:

• Battery (per unit): 16kWh usable energy (LFP), 48V

• Inverter type: 48V hybrid inverter

• AC output compatibility: 240V split-phase and 208V three-phase

• Solar inputs: 3 MPPT (independent)

• PV input (max): up to 25kW (inverter)

• Continuous backup output: 12kW (inverter)

• Max export power: up to 16kW (inverter)

• System expansion: add eBoost batteries via eWay; scalable up to 16 batteries and 10 inverters (per provided system guidance)

• Warranty: 10 years (battery + inverter)

What’s Included:

• Fortress Power Envy Duo 21 Hybrid Inverter (qty varies by option)

• Fortress Power eBoost 16kWh LFP Battery (qty varies by option)

• Fortress Power eWay Conduit Box

Ideal For:

• Whole-home or critical-load backup power

• DIY off-grid cabins, homesteads, and workshops

• Homes/light commercial sites needing high-capacity storage in a compact footprint

• Systems that may grow over time (easy battery add-ons)

User Manual / Documents:

Fortress Power eBoost Scalable Energy Storage System Data Sheet

Fortress Power Envy Duo 21 Hybrid Inverter Data Sheet

Fortress Power Envy Duo 21 Hybrid Inverter Installation Manual

Fortress Power Envy Duo 21 Hybrid Inverter Warranty