PHI 1.4™ Battery

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SimpliPhi Power’s PHI 1.4™ Battery utilizes the safest Lithium-Ion chemistry available, Lithium Ferro Phosphate (LFP). No cobalt or explosive hazards that put customers at risk. By eliminating cobalt, the risk of thermal runaway, fire propagation, operating temperature constraints, and toxic coolants are reduced. When combined with our integrated high-performance Battery Management System (BMS), accessible DC breaker On/Off switch and overcurrent protection (OCPD), the PHI 1.4 Battery delivers safe, highly efficient and cost-effective service over the life of both small recreational and residential installations, on or off-grid. Compatible with all industry-standard inverter charge controllers, the PHI 1.4 Battery supports balance-of-system equipment and optimizes any power generation source – solar, wind, grid, generator – with scalable, on-demand energy storage solutions for RVs, critical back-up and daily savings on electricity bills.

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CHEMISTRYLithium Ferro Phosphate (LFP)
The safest Lithium Ion chemistry available
No cobalt, risk of thermal runaway or fire
BMSBuilt-in Battery Management System
CONNECTORSThreaded Terminal
COMPATIBILITYCompatible with all industry standard inverters and charge controllers
Battery bank-to-inverter output sizing must adhere to a 2:1 ratio:
battery quantity = (inverter kWAC rating ÷ inverter efficiency)
÷ battery MAX Continuous Discharge Rate in kWDC
No ventilation, cooling or thermal regulation required


“SimpliPhi batteries eliminated the most difficult challenges we face when building microgrids in remote tropical locations. The batteries are much easier to transport and they have a good chance of lasting the entire 20 years. This means SimpliPhi batteries generally pay for themselves in under 4 years!”
Offgrid Tech’s Kevin Kellenberger, Papua New Guinea, July 2018


PHI 1.4™12V24V
DC Voltages – Nominal12.8VDC25.6VDC
Amp-Hours115 Ah57 Ah
Rated kWh Capacity @ C/21.4 kWh DC @ 100% DOD
1.12 kWh DC @ 80% DOD
1.4 kWh DC @ 100% DOD
1.12 kWh DC @ 80% DOD
MAX Discharge Rate (10 minutes)100 Amps DC (1.2 kW DC)60 Amps DC (1.53 kW DC)
MAX Continuous Discharge Rate57 Amps DC (0.69 kW DC)28.5 Amps DC (0.73 kW DC)
MAX Continuous Charge Rate57 Amps DC (0.69 kW DC)28.5 Amps DC (0.73 kW DC)
DC Voltage Range112 VDC to 14 VDC24 VDC to 28 VDC
Depth of Discharge1up to 100%up to 100%
Operating Efficiency98%98%
Charge Temperature132° to 120°F (0° to 49°C)32° to 120°F (0° to 49°C)
Operating Temperature1-4° to 140°F (-20° to 60°C)-4° to 140°F (-20° to 60°C)
Storage Temperature16 months: 14° to 77° F (-10° to 25° C)
3 months: -4° to 113° F (-20° to 45° C)
6 months: 14° to 77° F (-10° to 25° C)
3 months: -4° to 113° F (-20° to 45° C)
Self-Discharge Rate<1% loss per month<1% loss per month
Cycle Life10,000+ (@80% DOD)10,000+ (@80% DOD)
Memory EffectNoneNone
Warranty Period10 Years10 Years
Weight33 lbs (15.1 kg)33 lbs (15.1 kg)
Dimensions11.25 x 9.25 x 7.25 inches/0.37 ft3
(23.495 x 28.575 x 18.415 cm/0.010m3)
11.25 x 9.25 x 7.25 inches/0.37 ft3
(23.495 x 28.575 x 18.415 cm/0.010m3)

1. Max operating conditions. Refer to Installation Manual for recommended conditions.

  • All specifications listed are typical/nominal and subject to change without notice.
  • UN 3480, Lithium Ion battery contained in equipment, 9, II
  • UL, CE, UN/DOT and RoHS compliant components – UL Certified
  • Designed and manufactured in California, USA


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