More Power. Lower Cost. Zero Added Complexity

Together, Fortress Power’s eBoost 16kWh solar battery and Envy Duo 21 inverter form a single, scalable power solution designed to install faster, cost less per kWh, and grow as system demands increase.

Why This Power Pair

  • Lowest installed cost per kWh in its class

  • Fast + clean installs enabled by Fortress Power’s eWay design

  • Scales easily as power needs grow

  • One platform for residential, off-grid, and commercial projects

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Proven in the Field

First Light Solar | Wyoming
Off-grid residential system using two 16 kWh eBoost batteries with Envy Duo, designed for long-term energy independence in remote conditions.

“This was our first Fortress Power install, and it was awesome. We had a couple of questions, got connected with their engineers right away, and were up & running in no time. The homeowner is extremely happy with the system.” — Shae, First Light Solar

Maverick MacGyver | Texas 
Off-grid install with two 16kWh eBoost batteries and an Envy Duo 21, mounted beneath the array for a streamlined, high-capacity outdoor setup.