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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 cobalt-free lithium ferro phosphate (LFP) battery delivers the safety, reliability, and performance homeowners need for backup power, solar storage, daily time-of-use savings, and participation in Virtual Power Plant (VPP) programs.
Designed for professional installers and serious homeowners, the SimpliPHI 6.6 system eliminates the complexity of traditional energy storage. Each module carries its own Battery Management System (BMS), RapidStak connectors handle power and communications in a single connection, and the EnergyTrak Gateway provides system monitoring over CAN Bus. Whether you need a single 6.65 kWh unit for essential backup or a multi-stack system delivering up to 119.7 kWh, this platform scales to meet any residential energy requirement.
SimpliPHI® 6.6 Battery System
The SimpliPHI 6.6 Battery delivers 6.65 kWh of energy storage per module with installation in under 5 minutes. RapidStak connectors eliminate wiring complexity, and the system is rated IP65 when stacked for indoor or outdoor installation with no cabinets required. Stack up to 18 units for 119.7 kWh of total capacity.
Faster 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
Full closed-loop integration with Sol-Ark, EG4, Growatt, Megarevo, and Solis inverters, plus broad non-communicating compatibility with any 48V lithium-supporting inverter.
Designed for Versatility
Use for backup power, time-of-use utility savings, solar+storage, off-grid power, or Virtual Power Plant (VPP) program participation.
SimpliPHI 6.6 Battery System Technical Specifications
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 stacked) |
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
EnergyTrak Gateway Gen 2
EnergyTrak provides real-time monitoring, battery health insights, remaining runtime estimates, alerts, and event history through an easy-to-use mobile app. Its upgraded Gateway supports Wi-Fi, Ethernet, and cellular connectivity with over-the-air software and firmware updates.
BSE-ET-GATEWAY-2
SimpliPHI 6.6 Universal Base (order one per stack)
The Briggs & Stratton Energy SimpliPHI 6.6 Universal Base is required for each battery stack and includes a 15-year manufacturer warranty. Manufacturer part number 053083 weighs 15 lb and ships in a 31 × 10 × 8-inch package.
BSE-SPHI-6.6-UNIVERSAL-BASE
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