Fortress Power
Fortress Power - 48v Envy Inverter 12kW
Fortress Power - 48v Envy Inverter 12kW
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Fortress Power - Envy Inverter 12 kW
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.
Key Features:
- 200A AC Passthrough Current For Whole Home Backup
- 3 MPPT Output For Max. 21 KW PV Array
- AC, DC And AC/DC Combined Coupling
- IP65 Rated For Indoor & Outdoor Installation
- Built-In Generator Input
- 10 Units In Parallel
- Local And Remote Monitoring/App
- Color LCD Touch Screen
- Batch Settings
Supported Applications:
- Backup
- Off-Grid
- Zero Export
- Time-Of-Use
- Peak Shaving
- Demand Response Integration (Coming Soon)
Whole-Home Backup / AC Passthrough One-Line Diagram

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 |
Downloads:
Envy True 12 Inverter – Data Sheet
Envy True 12 Inverter – Manual
Envy Battery-Inverter Integration Guide
Fortress Power System Design Tool
Envy Inverter Monitoring Setup Guide
OGPe Certification
Warranty
Warranty
Warranty:
Warranty information may vary depending on the manufacturer, so please refer to the individual product pages for details. It's important to note that warranties cover damages that occur over time and from use. If an item arrives damaged and is not reported within 30 days, it is not considered a warranty claim.
For any questions, please contact support @ thehomeupgrade.com.
Shipping & Returns
Shipping & Returns
Cancellation & Refund Policy:
At The Home Upgrade, we take pride in offering one of the industry's best return policies. You can cancel your order free of charge at any time before it has shipped, with some exceptions for custom-made orders. For cancellations, please contact us at 469-809-4999 or email support @ thehomeupgrade.com.
Cancellations (Before Order Ships):
If you need to cancel an order, please contact us as within 24 hours so that we can process a full refund before your order is shipped from the warehouse. You can reach our agents during business hours at (469) 809-4999, through the chat in the bottom right, or by emailing support@thehomeupgrade.com at any time.
Cancellations of Custom Orders:
Custom or made-to-order products cannot be cancelled or refunded, as these products are specifically produced for your order. These units are custom made according to your specifications or created once you place your order. Your warranty ensures that you receive a fully functional and operational product. If you are unsure whether your order is custom or made-to-order, please message or call us for clarification. All sales are final for custom-made and made-to-order products.
Refunds and Returns:
If you need to exchange your product, you may do so, but please note that you, as the customer, are responsible for any shipping costs incurred during the returns and exchange process. Please be aware that not all orders are eligible for return once they have shipped, as we source our products directly from manufacturers. Therefore, if the manufacturer does not permit us to return a product, we are unable to offer you a return. This policy may vary on a case-by-case basis, so please reach out to us for specific information regarding your brand and/or product. Due to the increasing costs of LTL/freight shipping, outright returns will be subject to a 25% cancellation fee plus return shipping costs. However, if you are replacing the product with something else, we may be able to assist with covering some of the costs, depending on the product.
Shipping Times:
We strive to deliver your order as quickly as possible. Estimated shipping times provided on the product pages are based on information from our suppliers and freight companies, but these estimates may change or vary without notice due to factors such as supply chain issues, delays in steel mills, manufacturing delays due to mills, high demand on shipping, factory/warehouse and dock workers, and so on).
Order delays are beyond The Home Upgrade's control and have proven to be unavoidable. We understand that this may be frustrating, and we kindly ask for your patience and understanding during these challenging times. We appreciate your business and value your patience.
FAQ's
FAQ's
Frequently Asked Questions:
When will I know if my order has shipped?
Once you place your order, you will receive an order confirmation email. This means that we have received your order and authorized your credit card for the purchase. We immediately check with our suppliers to confirm stock availability for immediate shipment. If your item is on backorder or unavailable, we will void the pre-authorization and notify you by email. If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment. In case of any delay in stock, we will contact you before accepting payment.
When will my order be shipped?
If your order is in stock and we have processed the charges to your credit card, it will be shipped within 2-5 business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the email address you provided during checkout. If you do not receive tracking information within six business days of your order, please feel free to follow up with us at support@ thehomeupgrade.com.
Shipping is limited to the lower 48 states of the USA. For any questions, please email us at support @ thehomeupgrade.com or call us at (469) 809-4999.
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