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Briggs & Stratton PHI 3.8 24V Specifications
| Model | PHI-3.8-24-M |
| Total Capacity | 3.87 kWh @ 100% DOD |
| Nominal Voltage | 25.6 VDC |
| Voltage Range | 24 VDC to 28 VDC |
| Amp-Hours | 151 Ah |
| Max Discharge Rate | 75 ADC (1.9 kW DC) |
| Max Charge Rate | 75 ADC (1.9 kW DC) |
| Surge Rate (10 min) | 80 ADC (2.05 kW DC) |
| Operating Temperature | -4°F to 140°F (-20°C to 60°C) |
| Cycle Life | 10,000+ cycles @ 80% DOD |
| Round-Trip Efficiency | 96% |
| Weight | 86 lbs (39.0 kg) |
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Briggs & Stratton PHI 3.8 24V Lithium Ion Battery
SKU PHI-3.8-24V
PHI™ 3.8 24V Lithium Battery
The PHI 3.8 24V battery system provides 3.87 kWh of energy storage using lithium ferro phosphate (LFP) chemistry that eliminates cobalt, reducing thermal runaway risks and fire propagation potential. This 24V configuration delivers 1.9 kW of continuous power with an accessible 100A DC breaker and overcurrent protection for enhanced safety and operational control.
This battery supports multiple power generation sources including solar, wind, grid, and generator systems. The modular design allows for scalable expansion to meet growing energy needs while maintaining compatibility with industry-standard inverter charge controllers that support 24V battery bank configurations.
PHI™ 3.8 24V Lithium Battery Features
- Safer LFP Chemistry: Lithium ferro phosphate technology eliminates cobalt, reducing thermal runaway risk and fire propagation with UL 9540A certification.
- Onboard DC Breaker: Accessible 100A DC breaker with on/off switch provides overcurrent protection and convenient system control from outside the enclosure.
- Modular Scalability: Retrofit-ready design allows adding additional 24V batteries to expand system capacity as energy needs grow over time.
- Universal Compatibility: Compatible with all industry-standard 24V inverter charge controllers when proper 2:1 battery-to-inverter sizing ratios are maintained.
- Extended Cycle Life: 10,000+ cycle rating at 80% depth of discharge with 96% round-trip efficiency for long-term energy storage performance.
Professional Installation Advantages
The PHI 3.8 24V battery delivers streamlined installation benefits that reduce material costs and simplify electrical design for professional installers.
- Compact 0.88 ft³ footprint with standardized 3/8" terminals for efficient space utilization
- Accessible external DC breaker eliminates separate combiner boxes and external disconnects
- Minimum 6 AWG cable requirement with standard bolt-on terminals for simplified wiring
- Efficient integration into existing electrical panels and conduit runs
- UL 9540 and UL 9540A certifications ensure code compliance for residential and commercial installations
- 10-year warranty provides long-term project confidence for installers and system owners
Briggs & Stratton PHI 3.8 24V Lithium Battery Review
The PHI 3.8 24V configuration serves specialized applications where 24V system voltage is required, particularly in smaller residential installations and RV applications. The 151 Ah capacity at 24V nominal provides substantial energy storage while maintaining compatibility with existing 24V infrastructure. The 75 ADC continuous rating delivers adequate power for essential loads while the 80 ADC surge capability handles motor starting and other high-demand applications.
The compact 13.5" x 14" x 8" footprint maximizes energy density while the 86-pound weight facilitates installation in space-constrained environments. The onboard 100A DC breaker eliminates the need for external disconnect switches, reducing component count and potential failure points. The extended operating temperature range from -4°F to 140°F ensures reliable performance across diverse installation environments, while the 10,000+ cycle life rating provides exceptional longevity for daily cycling applications in off-grid or backup power scenarios.
Briggs & Stratton PHI 3.8 24V Features
Scalable to meet your energy needs
Modular design allows retrofit installation of additional PHI-3.8-M batteries to expand system capacity as energy requirements grow over time.
Onboard Over-Current Protection
Standard 100A DC over-current breaker with accessible external on/off switch safe and convenient system control without requiring enclosure access.
Industry-Wide Inverter Compatibility
Compatible with all industry-standard inverter charge controllers when proper 2:1 battery bank-to-inverter output sizing ratios are maintained.
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