Fortress Power Solo 6.5kW Off-Grid Inverter + 2x eFlex MAX 5.4kWh LFP Battery Bundle

Get a complete 48V off-grid power system in one bundle: the Fortress Power Solo 6.5K split/single-phase inverter paired with two eFlex MAX 5.4kWh LFP batteries for 10.8kWh of total usable storage. Built for off-grid homes, backup power, and hybrid solar storage, this combo delivers 6,500W of continuous output backed by durable, weatherproof lithium iron phosphate batteries rated for the toughest installs.

What's Included:

• 1x Fortress Power Solo 6.5K Off-Grid Inverter
• 2x Fortress Power eFlex MAX 5.4kWh LFP Battery (10.8kWh total)

Solo 6.5K Inverter Features:

• 6,500W continuous output (13,000W peak)
• 120/240V split/single-phase pure sine wave
• Built-in 140A solar charge controller
• Dual MPPT channels (2x 5,000W input, up to 10kW total)
• Grid/generator input for hybrid use
• Scalable to 39kW (parallel up to 6 units)
• Intelligent time-of-use scheduling, optional CTs for load control
• Indoor use (IP20), quiet operation under 60dB

eFlex MAX 5.4kWh Battery Features (each):

• Tier 1 automotive-grade prismatic LFP cells with high cycle life
• IP65 dust and waterproof enclosure, patented design for 4x better thermal performance
• Digital Processor BMS with individual cell voltage and temperature monitoring
• Integrated 125A breaker, minimal idle consumption (2W)
• Canbus/Modbus communication, OTA firmware updates, remote monitoring
• Advanced closed-loop communication with most 48V inverters

Note: Wall mount brackets and busbar are not included with the eFlex MAX batteries and may be added separately. Two units can be wall-mounted or rack-stacked per Fortress Power's standard configuration.

Applications: Off-grid homes | Backup power | Peak shaving | Smart load control | Net metering