• Description

Fortress Power Envy True 12 | 12kW Whole Home Solar Storage Inverter | 10 Year Warranty

The Fortress Power Envy True 12 – a whole-home, all-in-one 12kW inverter solution. Paired with the Fortress Power eFlex 5.4 kWh, the eVault MAX 18.5 kWh or LFP-10 MAX batteries, the Envy features a 200A AC passthrough providing up to 12kW (50A @ 240V) of whole-home backup power. The Envy features a built-in generator input with AC/DC coupling, on- and off-grid capabilities, plus a 3 MPPT output allowing for a maximum of 21 kW PV array. The Envy is equipped with a built-in APsmart Module Level Rapid Shutdown Transmitter and Button, along with Pre-built AC & DC breakers allowing for fast installation and commissioning. Use our online monitoring app to access your system from anywhere.

Fortress Power Envy True 12 Key Features:

  • 200A AC Passthrough Current For Whole Home Backup
  • 3MPPT Output For Max 21kW PV Array
  • AC / DC Coupling
  • IP65 Rated For Indoor & Outdoor Installation
  • Built-In Generator Port
  • 5 Units In Parallel
  • Online Monitoring/App
  • Color LCD Touch Screen
  • 3 Phase Compatible (Upcoming Feature)

Supported Applications:

  • Backup
  • Off-Grid
  • Zero Export
  • Time-Of-Use
  • Peak Shaving
  • Demand Response Integration (Coming Soon)

Fortress Power Envy True 12 Specifications

Input DC (PV Side)

  • Max. DC Input Power for Single MPPT 12000W/7000W/7000W 1 x 12kW, 2 x 7kW
  • Max. PV Input Power 21000W
  • Max. PV Power Delivered to Battery & AC Outputs 18000W
  • DC Input Voltage Range 100V-600V
  • Nominal DC Input Voltage 360V
  • Full Power MPPT Voltage Range 230V-500V
  • Max. DC Input Current 25A/15A/15A
  • MPPT Number/(Strings per MPPT) 3(2/1/1)

Output/Input AC (Grid)

  • Continuous AC Power to Grid 12000W (240V)
  • Continuous AC Power to Load with Grid or Generator 48000W (240V)
  • Nominal Output Voltage 120V/240V
  • Max. Continuous AC Current 50A @ 240V
  • Nominal AC Frequency 50Hz/60Hz

Output AC (Off-Grid)

  • Max. Output Power 12000W (240V)
  • Nominal Output Voltage 120V/240V
  • Nominal Output Frequency 50Hz/60hZ
  • Nominal Output Current 50A @ 240V
  • Peak Power 14kW 10 minutes / 16kW 5 minutes / 20kW 500ms
  • Switching Time Seamless

Battery Parameters

  • Compatible Battery Type eVault Max, eFlex, LFP-10 MAX
  • Nominal Battery Voltage 48V
  • Battery Voltage Range 48V-56V
  • Maximum Charging/Discharging Current 250A
  • Maximum Charging/Discharging Power 12000W

Efficiency

  • MPPT Efficiency 99.9%
  • Max. Efficiency 97.5%
  • CEC Efficiency 96.5%

Protection

  • Anti-islanding Protection YES
  • DC Switch YES
  • Ingress Protect Degree NEMA 4X, IP65
  • SPD Protection YES
  • AFCI OPT
  • RSD Built-in APsmart Transmitter

General Data

  • Dimensions 31.1 x 20.5 x 10.4 in (790 x 520 x 264 mm)
  • Weight 127 lbs (58 kg)
  • Display Color LCD
  • Ambient Temperature Range -20 to 60 °C (-4 to 140 °F)
  • Cooling FAN
  • Communication RS485/Wi-Fi/CAN

Standard & Certification

  • Certifications UL1741, UL1741SB, IEEE1547A, Rule 21, ISO-NE, FCC15 class B, HECO, CEC, Luma
  • Warranty 10 Years / Lead Acid or Fortress Lithium Batteries Only

Envy True 12 kW Inverter – Data Sheet

Envy True 12 kW Inverter – Manual

Fortress Power System Design Tool

Envy True 12 kW Inverter – Warranty Letter

Still Have Questions? Give us a call today 1-513-743-2829

Frequently Asked Questions

Yes! We provide free and fast shipping on MOST orders within the continental United States. However, some specific brands and items will require a quote. You can live chat or call us for a quote
Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.
We offer easy returns as long as your item meets the conditions outlined in our Return Policy. Items must be unused, in original packaging, and returned within the specified return window.
Absolutely! Our in-house product experts are here to help. Live chat or call us 513-743-829 for personalized advice before or after your purchase.
Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.
Yes, we only sell 100% authentic, brand-new products, sourced directly from our manufacturers or authorized distributors.
REAL REVIEWS, REAL RESULTS

Feedback From Our Customers

At Green Vista Living, we pride ourselves on delivering top-quality products and exceptional service to solar professionals and homeowners alike. Here's what our customers have to say about their experiences with us.

Kevin Leary
May 18, 2025
★★★★★

Incredible Tech Support from Anees of Green Vista Living. Exceptional service and went above and beyond on every question.

Bryan Cunningham
Off grid Kit • Dec 21, 2025
★★★★★

Shipment was slow due to high demand, but the team kept me informed and ensured everything arrived properly.

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