Name: Fortress eFlex 5.4 kWh 48V Lithium Solar Battery
Brand: Fortress Power
Availability: InStock

Highlights — Fortress eFlex 5.4

Energy: 5.4 kWh usable • Voltage: 48 V nominal
Chemistry: Lithium Iron Phosphate (LFP) with advanced BMS
Mounting: Floor, wall, or rack with flexible accessories
Integration: Compatible with leading hybrid inverters
Ideal Use: Off‑grid, backup, and self‑consumption systems

Island‑wide support and delivery: Hawaiʻi Island, Maui, Oʻahu, Molokaʻi, and Lānaʻi.

See It In Action — Official Fortress Video

Manufacturer video overview of the eFlex 5.4 kWh battery.

DIY‑friendly guidance — You can build this with our help.
Island expertise — Sizing and parts optimized for Hawaiʻi conditions.
Straightforward logistics — We coordinate inter‑island shipping and local delivery.
One‑stop supplier — Batteries, solar panels, PV wire, MC4 connectors, balance of system.

Ready to order or need help with sizing and components? Call or text 808‑313‑0608 or email consultdougnow@gmail.com.

Serving: Hawaiʻi Island • Maui • Oʻahu • Molokaʻi • Lānaʻi