Fortress Power Envy 10kW 48V Storage Hybrid Inverter

The Fortress Power Envy 10kW is an all-in-one hybrid inverter designed to be the central brain of a powerful residential energy storage system. Bridging the gap between standard backup and whole-home resilience, it delivers 10kW of continuous power and supports massive solar arrays up to 15kW. It integrates an inverter, battery charger, and transfer switch into a sleek, IP65-rated unit that pairs perfectly with Fortress eFlex, eForce, and eVault batteries.

Product Specifications

• Max PV Input: 15,000 W (600V Max Voc)

• MPPT Trackers: 2 Independent MPPTs

• Battery Voltage: 48V Nominal (40-60V Range)

• Max Battery Charge/Discharge: 210 A

• Surge Power: 20,000 VA (500ms)

• Grid Pass-Through: 60 A

• Efficiency: 97.5% (Max) / 96.5% (CEC Weighted)

Why Choose Fortress Envy 10kW

The Envy 10kW is the ideal choice for homeowners who need more than the standard 8kW inverter can offer but don’t quite need the 200A passthrough of the larger 12kW “True” model. It strikes a perfect balance of power and price, capable of running heavy appliances like electric stoves, well pumps, and smaller A/C units during an outage. Its seamless integration with Fortress batteries ensures a “closed-loop” communication system that maximizes battery life and efficiency.

Benefits of Fortress Envy 10kW

• Massive Solar Potential: With 2 MPPT trackers supporting up to 15kW of PV input, you can install a larger solar array to ensure your batteries charge fully even on cloudy winter days.

• Whole-Home Capable Power: The 10kW continuous output (with a 20kW surge) provides enough muscle to start and run substantial household loads that smaller inverters would trip on.

• Simplified Safety: Features a built-in APsmart Rapid Shutdown transmitter, reducing installation costs and complexity by eliminating the need for external safety hardware on the roof.

• Generator Integration: Includes a dedicated 50A input for standby generators, allowing the system to automatically start your generator to recharge batteries during extended grid failures.

General Data

• Dimensions (H x W x D): 29.5 x 20.5 x 11.23 in (750 x 520 x 285 mm)

• Weight: 110 lbs (50 kg)

• Enclosure Rating: IP65 / NEMA 4X (Outdoor Rated)

• Cooling: Active Fan Cooling

• Operating Temperature: -13°F to 140°F (-25°C to 60°C)

• Stackable: Yes (Up to 10 units)

Frequently Asked Questions

Q1: What is the difference between the Envy 8kW, 10kW, and 12kW?

The 8kW and 10kW models share the same smaller chassis and 60A passthrough, differing mainly in power output and solar input limits (13kW vs 15kW PV). The Envy True 12kW is a physically larger unit with a 200A pass-through for whole-home backup without a sub-panel.

Q2: Does it come with the Rapid Shutdown transmitter?

Yes. The Envy 10kW features a built-in APsmart Rapid Shutdown transmitter. If you use compatible APsmart receivers on your solar panels, you do not need to buy an external transmitter box.

Q3: Can I install this outside?

Yes. The unit is IP65 / NEMA 4X rated, meaning it is fully weather-resistant and safe for outdoor installation, although a shaded area is recommended to keep it cool.

Q4: Which batteries work best with it?

While it works with most 48V batteries, it is optimized for Fortress Power batteries (eVault MAX, eFlex, eForce). Using these allows for closed-loop communication, where the battery and inverter “talk” to optimize charging and safety.

Q5: Can I stack multiple units?

Yes. You can parallel up to 10 units for a total of 100kW of power, making it scalable for very large luxury homes or light commercial applications.

If you have any questions about the item or your order, please feel free to message before purchasing. Thank you!