Fortress eFlex Max - Battery Only 105 AH, 5.4 kWh

Fortress eFlex Max 105 AH, 5.4 kWh Battery

The Fortress eFlex Max Battery 105 AH, 5.4 kWh is a modular fortress power eflex max 5.4kwh lithium battery built for residential backup, off-grid systems, and energy independence. Operating on Tier-1 Prismatic Lithium Iron Phosphate (LiFePO4) chemistry, it offers 5.374 kWh of nominal energy capacity and 105 Ah output with high round-trip charge and discharge efficiency to minimize energy losses during daily cycling or long-term standby storage.

Housed in an IP65 saltwater-proof aluminum enclosure, this unit delivers long-lasting power during emergency grid outages and harsh ambient conditions. The package includes communication cables and a Flex Max top cover (wall-mount brackets and busbars sold separately), allowing single-battery deployment or multi-unit parallel scaling up to 86 kWh for custom solar arrays.

Technical Specifications & Hardware Capabilities for the eFlex Max:

• Brand / Manufacturer: Fortress Power
• Nominal Capacity: 105 Ah
• Nominal Energy: 5.374 kWh
• Maximum Charge Current: 100 A
• Maximum Continuous Discharge Current: 100 A
• Recommended Charge Current: <55 A
• Recommended Charge Voltage: 55.2 V
• Maximum Surge: 130 A for 5 seconds
• Dimensions: 17.5 × 7.2 × 24.2 in (446 × 184 × 616 mm)
• Enclosure: IP65
• Terminal: M8
• Warranty Coverage: 10-Year Manufacturer Warranty