EG4 FlexBOSS 26K Titan Kit
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Visit CalculatorThe EG4 FlexBOSS 26K Titan Kit delivers an all-in-one, high-capacity energy storage and hybrid power solution for residential and commercial systems. Designed for whole-home backup, off-grid installations, and energy independence, this powerhouse kit integrates advanced hybrid inverters with long-lasting lithium batteries to ensure seamless performance, scalability, and reliability.
Featuring EG4 FlexBOSS18 Hybrid Inverters paired with 48V PowerPro or WallMount Batteries, the Titan Kit provides intelligent load management, rapid transfer switching, and parallel scalability — capable of powering large homes, shops, or small commercial facilities. With UL certifications and smart monitoring integration, it’s the ultimate balance of performance and safety for next-generation solar systems.

High-Output Hybrid Power - The system combines two to three EG4 FlexBOSS18 Hybrid Inverters, delivering up to 26–39kW continuous AC output and up to 42kW PV input, ideal for powering entire households or light commercial loads.
Scalable Energy Storage - Configured with four to six 48V 280Ah (14.3kWh) LiFePO₄ batteries, offering 57.2kWh to 85.8kWh of total storage. Expandable to match your growing energy needs.
Indoor and Outdoor Battery Options - Choose between EG4 WallMount Indoor Batteries or EG4 PowerPro All-Weather Outdoor Batteries — each with integrated heating, smart BMS, and a 10,000+ cycle lifespan.
Advanced Energy Management -The FlexBOSS platform features hybrid inverter control, parallel stacking, split-phase support, and smart grid-interactive functionality for solar, generator, and grid input management.
UL & Safety Certified Components -All included batteries and inverters are UL 9540A, UL 1973, and UL 9540 compliant, ensuring unmatched safety, efficiency, and regulatory compliance.
Intelligent Monitoring and App Control -Monitor system performance, PV production, and battery status via the EG4 Monitoring Portal, compatible with local and remote access for complete system insight.


Each EG4 FlexBOSS 26K Titan Kit includes the following high-performance components (varies by selected configuration):
Core Components
Battery
Accessories
| Specification | Details |
| Dimensions | 29.52 x 20.47 x 10.43 in. (750 x 520 x 265 mm) |
| Total Weight | 115 lbs. (52 kg) |
| Mounting Option(s) | Wall |
| User Interface | APP/WEB/LCD (optional) |
| Scalability | 10 |
| Inverter Idle Consumption @No Load @(*Temp) | <60W (Standby) |
| Noise | <50dB @ 3 ft |
| Locked Rotor Amps (LRA) | 195A |
| Specification | Details |
| Communication Ports | RS485/CAN Can be customized |
| Cycle Life | >8000 Cycles, 80% Depth of Discharge (DOD) |
| Design Life | Over 15 Years |
| Weight | 282.2 lbs. (128 kg) |
| Safety Certifications | UL1973, UL 9540A (Testing) |
| Voltage | 51.2V |
| Total Energy Capacity | 14.3kWh |
| Capacity | 280Ah |
| Charging Voltage (Bulk/Absorb) | 56.0V (+/-0.8V) to 56.2V (+/-0.2V) |
| Float Voltage | 54V (+/-0.2V) |
| Low DC Cutoff | 44.8V (adjustable start from 47V to 45.6V) |
| Charging Current | Up to 200A (continuous), recommended range: 60A - 160A |
| Discharging Current | Up to 200A (continuous), recommended: 160A |
| Specification | Details |
| Battery Type | LiFePO4 (Lithium Iron Phosphate, Grade A) |
| Voltage | 48V (Nominal: 51.2V, Float: 54V) |
| Continuous Charge/Discharge Current | 200A (Max) |
| Capacity | 14.3kWh |
| BMS | 200A |
| Weight | 308.6 lbs. / 140Kg |
| Specification | Details |
| Communication Interface | RS485/Wi-Fi/CAN |
| Internal Bus Rating | 350A |
| Internal Fuse Rating | 315A |
| Operating Altitude | <6561 ft (<2000 m) |
| Relative Humidity | 0 – 100% |
| Outdoor Rating | NEMA 3R |
| Operating Ambient Temperature Range | -40°F – 140°F (-40°C – 60°C) |
| Product Dimensions (HxWxD) | 31.5×19.7×7 in (800×500×178 mm) |
| Unit Weight | 55 lbs. (25 kg) |
| Standard Warranty | 10-year standard warranty |
Can the EG4 FlexBOSS 26K Titan Kit operate fully off-grid?
Yes. This kit is designed for both grid-tied and off-grid systems, offering complete independence when disconnected from utility power.
Is it scalable for larger systems?
Absolutely. The system can be expanded by adding additional FlexBOSS inverters or battery modules to increase capacity as needed.
Can I use indoor or outdoor batteries interchangeably?
Yes. The kit supports both WallMount Indoor and PowerPro Outdoor battery types, depending on installation preferences.
Does the system include monitoring software?
Yes. The EG4 Monitoring Platform provides real-time data tracking, load management, and remote diagnostics.
What is the expected lifespan of the batteries?
The included LiFePO₄ batteries last for 10,000+ cycles—equivalent to over 10 years of daily use.
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