Fortress FlexTower Inverter Outdoor Rated Enclosure for Sol-Ark 12K or 15K Inverter

Fortress FlexTower All-in-One Enclosure Architecture

The Fortress FlexTower Inverter Outdoor Rated Enclosure for Sol-Ark 12K or 15K Inverter is an all-in-one energy storage cabinet designed to organize electrical components in residential and light commercial solar installations. Engineered for versatile indoor or outdoor deployment, the fortress flextower housing accommodates Fortress Power eFlex or eFlex MAX Lithium Iron Phosphate (LiFePO4) battery modules alongside Sol-Ark 12K/15K hybrid inverters or Fortress Power Envy models.

Built inside a heavy-duty IP54-rated weatherproof cabinet, this enclosure features integrated fan cooling to maintain stable internal operating temperatures ranging from 32°F to 114°F (0°C to 45°C). Measuring 29.2 x 83.78 x 17.8 inches and weighing 265 lbs empty, the UL 9540 certified system supports scalable battery storage capacities spanning from 16.2 kWh up to 151.2 kWh for whole-home backup power.

Technical Specifications & Cabinet Capabilities for the FlexTower

• Brand / Manufacturer: Fortress Power
• Product Model: FlexTower Inverter Outdoor Rated Enclosure
• Enclosure Weight: 265 lb (120 kg)
• Dimensions (W × H × D): 29.2 × 83.78 × 17.8 in
• IP Rating: IP54
• Operating Temperature: 32°F–114°F (0°C–45°C)
• Cooling: Fan cooling)
• Battery Chemistry: Lithium Iron Phosphate (LiFePO₄)
• Battery Capacity Range: 16.2–151.2 kWh
• Enclosure Environmental Rating: IP54 Outdoor Rated Enclosure
• Target Battery Compatibility: Fortress Power eFlex & eFlex MAX LiFePO4 Battery Modules
• Target Inverter Compatibility: Sol-Ark 12K / Sol-Ark 15K / Fortress Power Envy Inverters