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:
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 Envy Duo 21 + eBoost 16 Bundle | 12kW 48V Hybrid Inverter + 16.1kWh LFP Battery | 3 MPPT | NEMA 4X/IP66 + IP65
- Regular price
- $18,906.04
- Sale price
- $18,906.04
- Regular price
-
$24,286.79
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Fortress Power Envy Duo 21 + eBoost 16 Bundle | 12kW 48V Hybrid Inverter + 16.1kWh LFP Battery | 3 MPPT | NEMA 4X/IP66 + IP65
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"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
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"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
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"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
"The whole process was seamless. From ordering to installation, everything was straightforward. Our electricity bill has dropped significantly!"
"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
"We compared prices everywhere and this was by far the best deal. The quality of the panels is top-notch and installation guidance was superb."
"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
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Frequently Asked Questions
Find the answers to some of the most common questions customers have before placing their order.
Yes. Our team can help you choose the right solar kit based on your goals, power needs, and location. We provide personalized guidance before and after your purchase at no additional cost.
Many of our customers complete the majority of installation themselves using our diagrams and support resources. For final electrical connections, a licensed electrician may be required depending on local codes.
While we do not directly install systems, we can help connect you with qualified local professionals and provide technical documentation to support your installer.
We stand behind our products. If you have specific questions about returns, eligibility, or specific product conditions, you can learn more in our help center linked below.
All components are backed by manufacturer warranties. In addition, our team provides free lifetime technical support to assist you throughout the life of your system.
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If you're ready to place your order, you can go ahead and checkout online right now. If you have questions, our friendly team of solar experts are happy to assist and can take your order over the phone. If you're interested in financing, you will find the application at checkout online. So whatever is best for you, we are happy to accommodate.
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