Skip to content

Fortress Power | True 12kW | Inverter | 48V, Triple MPPT, IP65

Get it between

Notify me when back in stock

Free Shipping

On All Products

Easy 30 Day Returns

Return with Ease

Secure Checkout

Secure Payment

At Crisis Comforts, we are committed to providing you with the best prices online. If you find a lower price for the same product, we guarantee to match or beat that price.

How it Works:

1. Eligibility: This guarantee applies to select products in our store.

2. Contact Us: Reach out to us via email or chat with your price match request.

3. Proof Required: Please provide a screenshot, link, or any other evidence of the lower price
before making your purchase.

For full details, refer to our Price Match Policy Rules.

At Crisis Comforts, we take pride in offering the best refund and return policies in the industry. If you're not satisfied with your purchase for any reason, you may return it to us within 30 days for a refund.

How it Works:

1. Initiate a Return: If there are any issues with your order, such as missing components, damages, or a non-functioning product, please contact us as soon as possible.

2. Troubleshooting: Some issues can be resolved by reviewing the product manual or our product FAQs.

3. Contact Us: Reach out via email or chat for assistance.

For full details, refer to our Refunds & Return Policy.

Order Processing

Once we receive your order, we will send you a confirmation email. We will then process your order by confirming that the product is in stock and ready for shipment. If any of the items in your order are back-ordered, we will reach out to you via email or phone, and you may choose to either wait or receive a 100% refund.

Please allow 1-3 days for processing your order.


Shipping times and methods will depend on the specific product and brand you purchase. If you have any shipping questions, feel free to ask on the chat or email us at

We will send tracking information by email the same day the shipping tracking number is created/available.

Before you sign the shipping bill, please THOROUGHLY INSPECT YOUR ITEM. Signing for the receipt of a damaged product removes the liability of the shipping company and Crisis Comforts. Once you accept your shipment as non-damaged, your item is your property.

Delivery Time

Shipping Timeline listed above is an estimate. Please call or message the web chat for precise ETAs.

Fortress Power Envy True 12 kW Inverter - Comprehensive Power Management - Data Sheet / Manual

Step into the realm of complete energy autonomy with the Fortress Power Envy True 12 kW Inverter, your ultimate all-in-one power solution for home and small commercial setups. This powerhouse is compatible with high-efficiency Fortress Power batteries, such as the eFlex 5.4 kWh, eVault MAX 18.5 kWh, and LFP-10 MAX, providing an impressive 12kW (50A @ 240V) of reliable backup power. With its robust 200A AC passthrough, the Envy True 12 kW stands as the backbone of your energy needs, delivering consistent power seamlessly.

Engineered for both on- and off-grid living, the Envy True 12 kW boasts triple MPPT outputs, supporting up to a 21 kW PV array, catering to your growing power requirements. The intuitive design includes a built-in APsmart Module Level Rapid Shutdown Transmitter for safety and ease of maintenance. Installation is revolutionized with pre-built AC & DC breakers, ensuring you're up and running without delay.

Tailored for a range of applications including backup, off-grid, and time-of-use, the Envy True 12 kW is IP65 rated for both indoor and outdoor installations, expanding its versatility. Stay connected and in control with local and remote monitoring capabilities via our app, complemented by a user-friendly color LCD touchscreen.

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/208V/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 / 50A @208V
Peak Power 14kW 10 minutes / 16kW 5 minutes / 20kW 500ms
Switching Time Seamless
Battery Parameters
Compatible Battery Type Lithium and Lead acid batteries
Nominal Battery Voltage 48V
Battery Voltage Range 48V-56V
Maximum Charging/Discharging Current 250A
Maximum Charging/Discharging Power 12000W
MPPT Efficiency 99.9%
Max. Efficiency 97.5%
CEC Efficiency 96.5%
Anti-islanding Protection YES
DC Switch YES
Ingress Protect Degree NEMA 4X, IP65
SPD Protection YES
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, SGIP, NOM
Warranty 10 Years / Lead Acid or Fortress Lithium Batteries , other 48v battery manufacturers**