SimpliPhi Power’s PHI 3.8™ Battery utilizes the safest Lithium Ion chemistry available, Lithium Ferro Phosphate (LFP), and has one of the longest life cycles on the market - 10,000 cycles! 


The PHI 3.8 Battery delivers safe, highly efficient and cost-effective service over the life of both residential and commercial installations, on or off-grid. The PHI 3.8 Battery supports balance-of-system equipment and optimizes any power generation source - solar, wind, grid, generator - with scalable, on-demand energy storage solutions for critical back-up and daily savings on electricity bills.



  • Available in 24 and 48 VDC
  • Drop in replacement for lead acid batteries
  • 10 year warranty / 10,000 cycles (at 80% DOD)
  • Compatible with all industry-standard inverters and charge controllers
  • Integrated 80A DC breaker On/Off switch and overcurrent protection (OCPD)
  • High-performance Battery Management System (BMS)
  • Up to 1.9 kW DC continuous output (2 kW surge) per battery 
  • LFP is the safest, most environmentally benign Lithium Ion chemistry available—no cobalt, risk of thermal runaway or fire

  • No AC or toxic liquid cooling—negligible parasitic drain —long cycle life

  • Non-toxic and non-hazardous recyclable materials


Application Note:

For high power applications (greater than  1.9 kW DC continuous) combine multiple PHI 3.8 Batteries in parallel or use SimpliPhi's High Output Batteries:

  • PHI 1.2 High Output (up to 2.8 kW DC continuous output, 4.1 kW surge)
  • PHI 2.4 High Output (up to 5.1 kW DC continuous output, 6.4 kW surge)
  • PHI 3.2 High Output (up to 2.8 kW DC continuous output, 4.1 kW surge)



SimpliPhi 3.8 kWh Lithium Battery (LiFePO4), 24/48 VDC