The Fortress Power eBoost 16kWh is a high-capacity, value-driven Lithium Iron Phosphate (LFP) battery designed for homeowners and installers who need maximum storage with minimum complexity. Offering a massive 16 kWh of usable energy in a single unit, it features an IP65 weather-rated enclosure, built-in heating for cold climates, and a unique “eWay” wire management system that simplifies installation. It is built to seamlessly integrate with the Fortress Envy inverter family but works with all major 48V hybrid inverters.

Product Specifications

• Voltage Range: 41.6V – 57.6V

• Max Continuous Current: 250 A (Discharge) / 180 A (Charge)

• Surge Power: 16 kW (10 seconds)

• Round Trip Efficiency: > 98%

• Communication: CAN / RS485

• Cycle Life: 8,000 Cycles (@ 70% EOL)

Why Choose eBoost 16kWh

The eBoost 16 is the “workhorse” of the Fortress Power lineup. It offers a higher energy density than the eFlex and a lower price point per kWh than the premium eForce series, making it the best value for large residential backup systems. Its integrated wheels and active heating system make it uniquely suited for garage or outdoor installations where temperature fluctuations and mobility are concerns.

Benefits of eBoost 16kWh

• Massive Single-Unit Power: A single eBoost unit provides 16 kWh of energy, often enough to power an average home’s essential loads for a full day without solar recharging.

• All-Weather Resilience: Rated IP65 for water and dust resistance, and equipped with internal heating elements, it charges safely in freezing temperatures (-4°F) where other batteries would fail.

• Simplified Wiring: The proprietary eWay wire box sits on top of the unit, consolidating all DC connections, busbars, and conduit ports into one clean hub, reducing installation time and ugly external cabling.

• High Surge Capability: Delivers up to 16kW of surge power (10 seconds), allowing it to start heavy inductive loads like well pumps and A/C compressors effortlessly.

General Data

• Dimensions (W*D*H): Battery 22.28″ x 11.27″ x 37.81 in (566 x 286 x 960.2 mm)

• Dimensions (W*D*H): eWay Top 22.8 x 9.52 x 10.18 in (580 x 241.9 x 258.5 mm)

• Weight: 304 lbs (138 kg)

• Mounting: Floor Standing (Wheels included)

• Operating Temperature: -4°F to 140°F (-20°C to 60°C)

• Certifications: UL 1973, UL 9540, UL 9540A, UN 38.3

Frequently Asked Questions

Q1: What is the “eWay” and do I need it?

Yes, the eWay is the control and wiring hub that mounts on top of the battery module. It contains the busbars, protection, and communication ports. You cannot install the eBoost battery without an eWay unit.

Q2: Can I install this battery outside?

Yes. The eBoost is IP65 rated and features internal heating, making it perfectly capable of withstanding outdoor elements and freezing temperatures (down to -4°F).

Q3: Does it work with Sol-Ark inverters?

Yes. The eBoost supports closed-loop communication with Sol-Ark 15K, 12K, and 8K inverters, as well as the Fortress Envy and other major brands like Schneider and Victron.

Q4: How heavy is it?

The battery unit weighs 353 lbs. However, it comes with integrated locking wheels, so once it is on the ground, it can be easily rolled into position by a single person on a flat surface.

Q5: Can I stack them vertically?

No. Unlike the eForce series, the eBoost is designed to stand side-by-side. You connect multiple units in parallel using the eWay wiring box, but they do not stack on top of each other.