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SimpliPhi Lithium-Ion Batteries

SimpliPhi your power with non-toxic Phi Lithium Ion batteries.

Deep-cycle Lithium Ferro Phosphate (LFP) SimpliPhi batteries for reliable and rugged integrated energy storage.

SimpliPhi Battery Models

SimpliPhi PHI 3.8 24V
SimpliPhi PHI 3.8 24V
151 AHr 24V Battery
  1. Safe Lithium Ferro Phosphate (LFP)
  2. Drop in lead acid replacement
  3. 24V Nominal Voltage
  4. On or off-grid
  5. 3,800 Wh capacity
SimpliPhi PHI 3.8 48V Battery
SimpliPhi PHI 3.8 48V
75 AHr 24V Battery
  1. Safe Lithium Ferro Phosphate (LFP)
  2. Drop in lead acid replacement
  3. 48V Nominal Voltage
  4. On or off-grid
  5. 3,800 Wh capacity

SimpliPhi Batteries for Reliable Storage

Design an energy storage system for your home, business or RV with a safe, simple, reliable and practical lithium ion battery solution. The PHI 3.8 is designed and manufactured in California, USA.

The PHI 3.8 Provides power security and seamless integration of renewable and traditional sources of energy in conjunction with or independent of the grid: net zero, peak shaving, emergency back-up, portable and> kWh 48V 75AHr deep-cycle Lithium Ferro Phosphate (LFP) battery is optimized with proprietary cell architecture, power electronics, BMS and assembly methods. It is modular, light-weight and scalable for installations that range from kWh to MWh.

SimpliPhi Battery Features

  • Non-Toxic & Non-Hazardous – No Thermal Runaway
  • No Heat Generation, Mitigation, Thermal Monitoring or Cooling Required
  • Extended Operating Temperature -4 to 140F
  • 98%+ Efficiency Charge & Discharge Rate
  • Fast Charge & Discharge Rates – Short & Long Duration in One Battery: 15 Minutes to 2+ Hours
  • 10,000 Cycle Life @ 80% Depth of Discharge
  • 5,000 Cycle Life @ 90% Depth of Discharge
  • 3,500 Cycle Life @ 100% Depth of Discharge
  • 10 Year Warranty – Expected Life 15 to 20 years – Cycle One to Several Times Per Day
  • Seamless Compatibility & Integration with All Industry Standard Inverter/Charge Controllers
  • Built-In Safety – BMS & 80 Amp Breaker for On/Off Switch During Shipping & Installation
  • Modular, Scalable & Proven Performance
  • Made in U.S.A.

Chemistry Lithium Ferro Phosphate (LFP) The safest Lithium Ion chemistry available No cobalt, risk of thermal runaway or fire
OCPD Built-in, accessible 80 Amp DC breaker on/off switch
BMS Built-in Battery Management System
Compatibility Compatible with all industry standard inverters and charge controllers
Maintenance Maintenance-free
No ventilation, cooling or thermal regulation required


  • Energy and power in one battery
  • Drop-in replacement for existing lead acid battery banks
  • On- or off-grid
  • No thermal monitoring, cooling, fire suppression or ventilation equipment required
  • No maintenance


  • 10-year warranty
  • High efficiency rate = more usable power for you
  • Provides primary or back-up power for on- or off-grid homes and businesses
  • Delivers multiple charge/discharge cycles per day
  • Operates in broad temperature range of -4 to 120 degrees F
  • Proven in the field for 9+ years


  • Stores electricity from solar, wind, diesel/ gas generators, the grid or any combination
  • Modular and scalable: seamlessly add more capacity if energy needs grow
  • Install in small spaces
  • Indoor and outdoor use in all climates


  • Environmentally benign and non-toxic Lithium Iron Phosphate (LFP)
  • No Cobalt - no hazards
  • No risk of overheating or fire
  • No fumes or off-gassing

SimpliPhi PHI Battery Warranty

10 Years or 10,000 cycles (@ 80% DOD)

Solar Electric Supply is an approved PG&E, So. Cal. Edison, SDG&E and So. Cal. Gas supplier for critical load battery storage and solar systems.

Compatible SimpliPhi Systems

Conext Quick Fit

Conext Quick Fit

Schneider Conext XW

Schneider XW

Example SimpliPhi Battery Systems

SimpliPhi Phi 3.8 lithium ion battery system Wall of SimpliPhi batteries

Expert SimpliPhi Li-ion battery reviews and low wholesale prices. Custom options available..

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Solar Battery Backup Systems

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