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Fortress Power Envy 8kW Hybrid Inverter
Smarter Power. Seamless Backup. Built for Energy Independence.
The Fortress Power Envy 8kW Hybrid Inverter is a powerful, all-in-one energy management solution designed for whole-home solar + storage systems. The Envy delivers reliable power for both residential and light commercial applications—on or off the grid.
Pair it with Fortress Power batteries like the eFlex, eFlex MAX, eVault MAX, or LFP-10 MAX to unlock scalable, high-performance energy storage. Built for flexibility, code compliance, and speed of installation, the Envy 8kW is the heart of your smart energy system—ready to power your life and connect to the grid when it counts.
Key Features:
Selectable Power Output for Any System Size: Choose between 8kW (33.3A @ 240V) ocontinuous output, with a generous 60A AC passthrough—ideal for powering full household loads or larger solar+storage systems.
Massive PV Input Capacity: With dual MPPT inputs, the Envy supports up to 13kW of solar input in 8kW mode —ensuring you get the most from your rooftop or ground-mount solar arrays.
Plug-and-Play Installation:Pre-integrated AC and DC breakers, spacious wiring zones, and a built-in APsmart Rapid Shutdown Transmitter make for faster, cleaner installs that are NEC 2017/2020 compliant right out of the box.
Parallel-Ready for Bigger Projects: Need more power? No problem. Parallel up to 10 inverters for a total output of 80kW (8kW mode)—ideal for larger homes, commercial buildings, or multi-family installations.
Supports Split-Phase & Three-Phase Systems: From standard 120/240V split-phase homes to 120/208V or 127/220V three-phase commercial sites, the Envy is versatile enough to handle complex electrical setups with ease.
Virtual Power Plant (VPP) Ready: Make your energy work for you. The Envy is VPP-compatible and utility-approved across the U.S. and Puerto Rico, enabling participation in demand response programs that pay you to discharge energy during peak times.
Remote Monitoring & Smart Control: Stay connected with the Fortress Power Guardian App, offering:
Real-time solar + battery performance tracking
Grid usage insights
Remote firmware updates
System diagnostics from anywhere
Applications:
Whole-home backup power
On-grid & off-grid residential systems
Light commercial installations
Multi-inverter systems
Solar + storage retrofits
VPP participation for energy compensation
What’s Included:
1 × Fortress Power Envy 8kW Hybrid Inverter
1 × Integrated Rapid Shutdown Transmitter
1 × Built-in AC/DC Breaker Set
1 × Mounting Hardware
1 × User Manual & Warranty Documentation
Battery and PV modules sold separately. Compatible with all Fortress Power LFP batteries.
Specifications
Specification
Envy 8K
Max. PV Input Power
13,000W
Max. PV Power to Battery & AC
12,000W
MPPTs / Strings per MPPT
2 / 2
Nominal Battery Voltage
48V
Max. Battery Charge/Discharge
167A / 8000W
Output Voltage (AC)
120/240V
Output Power (Off-Grid)
8000W
Max. Output Current
33.3A @ 240V
Peak Power
16kW (500ms)
Generator Port
50A / 12kW
Switching Time
<20ms
Efficiency
Max 97.5%, CEC 96.5%
Enclosure Rating
NEMA 4X, IP65
Dimensions
29.5 × 20.5 × 11.23 in
Weight
110 lbs
Communication
RS485 / Wi-Fi / CAN
Certifications
UL1741, UL1741SB, IEEE1547A, CEC
Warranty
10 years
Shopping Guide
Power Storage & Inverter
Item / Appliance
Typical Power (W)
Usage Time (hrs)
Total Energy Needed (Wh)
Battery Size Needed (Ah) (12V System)
Inverter Size Needed (W)
LED Light Bulb (10W)
10W
5 hrs
50 Wh
4.2 Ah
100W
Phone Charging
5–10W
2 hrs
10–20 Wh
0.8–1.7 Ah
100W
Laptop Charging
50–100W
3 hrs
150–300 Wh
12.5–25 Ah
200W
Ceiling Fan
75W
6 hrs
450 Wh
37.5 Ah
150W
LED TV (32")
60W
4 hrs
240 Wh
20 Ah
150–200W
Refrigerator (Mini)
100W (avg)
8 hrs
800 Wh
66.6 Ah
300–500W
Water Pump (1HP)
750W
1 hr
750 Wh
62.5 Ah
1000W
Microwave Oven
1000W
0.5 hr
500 Wh
41.6 Ah
1200–1500W
Electric Kettle
1500W
0.3 hr
450 Wh
37.5 Ah
2000W
Key Formulas
Purpose
Formula
Example
Energy Consumption (Wh)
Watts × Hours
60W × 4 hrs = 240 Wh
Battery Capacity (Ah)
Watt-hours ÷ System Voltage (V)
240 Wh ÷ 12V = 20 Ah
Inverter Size (W)
Total Watts × 1.25 (for safety margin)
300W × 1.25 = 375W → Use 400W inverter
Total Load Power (W)
Sum of all appliance watts to be used at once
Light (10W) + Fan (75W) = 85W
Runtime (hrs) of Battery
(Battery Ah × Voltage) ÷ Total Load (W)
(100Ah × 12V) ÷ 240W = 5 hrs
How To Choose The Right Products
Need / Application
Recommended Battery
Inverter Size
Notes
Basic lighting + phone charging
50Ah – 100Ah (12V)
100W–200W
For small backup setups
Home office (laptop, fan, TV)
150Ah – 200Ah (12V or 24V)
500W – 1000W
For moderate usage with 4–6 hours of backup
Home backup (fridge, lights)
200Ah+ (24V or 48V recommended)
1000W – 1500W
Ideal for longer backups or heavier loads
Business / shop power backup
300Ah+ (48V system)
2000W – 3000W
Suitable for commercial setups or extended power outages
Why Shop With Us
Why Shop With Ecogrid Supply?
Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products with full manufacturer warranties.
Fast, Reliable Shipping: All items ship from our U.S. warehouses with quick and dependable freight options to keep your project on track.
30-Day Hassle-Free Returns: Change your mind? No worries — enjoy a simple 30-day return process for peace of mind.
Real Human Support, 7 Days a Week: Reach us by phone, email, or live chat — no bots, no overseas call centers, just real people who know off-grid power systems.
Expert Energy Guidance: Our solar and backup energy specialists are ready to help you with design, planning, product questions, and installation tips.
USA-Based Service: Our team proudly operates here in the United States, providing local, knowledgeable, and friendly support.
Secure Payments: Shop confidently with our encrypted, secure checkout to protect your personal and payment information.
Built for Energy Independence: Whether you’re powering a cabin, prepping for emergencies, or going off-grid, our products are selected for performance, reliability, and sustainable operation.