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SimpliPHI® 6.6 Battery System
Built for Safety, Speed, and Reliable Performance
Briggs & Stratton brings decades of power generation expertise to home energy storage with the SimpliPHI® 6.6 battery system. This lithium ferro phosphate (LFP) battery delivers the safety, reliability, and performance homeowners need for backup power, solar storage, and daily energy cost savings.
Designed for professional installers and serious homeowners, the SimpliPHI® 6.6 system eliminates the complexity and safety concerns of traditional energy storage. The integrated Battery Management System (BMS), RapidStak™ connectors, and advanced safety features ensure safe, efficient operation throughout the system's life. Whether you need a single 6.65 kWh unit for essential backup or a multi-stack system delivering up to 119.7 kWh, the SimpliPHI® 6.6 scales to meet any residential or light commercial energy requirement.
SimpliPHI® 6.6 Battery System
The SimpliPHI 6.6 Battery delivers 6.65 kWh of energy storage with installation in under 5 minutes. Featuring RapidStak™ connectors that eliminate wiring complexity, this IP65-rated system can be stacked up to 18 units for 119.7 kWh of total capacity. Built for both indoor and outdoor installations with no cabinets required.
SimpliPHI 6.6 Product Info PageFaster Installations
Our unique RapidStak connector includes all communications and power in one connection. Assemble a stack of 3 in under 5 minutes.
Wire and Hassle Free
No wires, no DIP switches, no complications. Installation requires fewer tools and accessories, and less cost.
Scalable for Any Application
Each battery delivers 6.65 kWh. Stack 3 for 19.95 kWh in a compact footprint. Scale up to 6 stacks for 119.7 kWh of energy.
Versatile Installation Options
IP65 rating supports all weather conditions for both indoor or outdoor installations. No cabinets needed. Ground or wall mount.
Choose Your Inverter
Designed to integrate with SimpliPHI®, Sol-Ark® and other leading inverters, offering ultimate flexibility and faster commissioning.
Designed for Versatility
Use for back-up power, time-of-use utility savings, solar+storage, or off-grid power.
SimpliPHI® 6.6 Technical Specifications
Complete technical details for professional installations
General Specifications
| Nominal Voltage | 51.2 VDC | Voltage Range | 44.8 - 56.8 VDC |
| Capacity (Ah) | 130 Ah | Capacity (kWh) | 6.656 kWh |
| Continuous Discharge | 130 ADC | Continuous Charge | 100 ADC |
| Surge Current | 240 ADC (2s) | Efficiency | ≥96% |
| Operating Temp | -20°C to 55°C | Charging Temp | -10°C to 50°C |
| Cycle Life | 4,500 Cycles (100% DOD) | Weight | 125 lbs (56.7 kg) |
| Dimensions | 28.6" × 17.3" × 6.7" | IP Rating | IP65 (when installed) |
Battery Module Stacked Configurations
| Configuration |
 |
 |
 |
|---|---|---|---|
| Total Capacity | 6.65 kWh | 13.3 kWh | 19.95 kWh |
| Charge Power | 3.33 kW | 6.66 kW | 9.98 kW |
| Discharge Power | 6.66 kW | 10.65 kW | 13.98 kW |
| Surge Power (10s) | 8.3 kW | 13.3 kW | 17.5 kW |
| Discharge Current | 130 ADC | 208 ADC | 273 ADC |
Safety Certifications
SimpliPHI® 6.6 Accessories
Complete your SimpliPHI® 6.6 system with these essential accessories
SimpliPHI 6.6 Floor Mount Base
Secure floor mounting solution designed specifically for the SimpliPHI 6.6 battery system. One floor mount base required per battery system for stable ground installation.
SimpliPHI 6.6 Wall Mount Base
Space-saving wall mounting solution for the SimpliPHI 6.6 battery system. One wall mount base required per battery system for secure vertical installation.
SimpliPHI Battery Controller
Essential battery management controller with 10-year warranty. One battery controller required per SimpliPHI 6.6 system for optimal performance and monitoring.
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