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
32kWh off-grid residential system pairing two eBoost batteries with an Envy Duo 21 inverter for dependable power 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 
64kWh off-grid system powered by four eBoost batteries and an Envy Duo 21 inverter, mounted beneath the array for a clean, high-performance outdoor install.