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Simpliphi Batteries PHI 3.8 M24V Lithium Ferrous Phosphate (LFP) battery 3.8kWh 24volts


CHEMISTRYLithium Ferro Phosphate (LFP)
The safest Lithium Ion chemistry available
No cobalt, risk of thermal runaway or fire
OCPDBuilt-in accessible 80 Amp DC breaker On/Off switch
BMSBuilt-in Battery Management System
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 Power’s PHI 3.8-MTM 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 80A DC breaker On/Off switch and over-current protection (OCPD), the PHI 3.8-M Battery delivers safe, highly efficient and cost-effective service over the life of both residential and commercial installations, on or off-grid. Compatible with all industry-standard inverter charge controllers, the PHI 3.8-M 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.


PHI 3.8-M™24V48V
DC Voltages – Nominal25.6VDC51.2VDC
Amp-Hours151 Ah75 Ah
Rated kWh Capacity @ C/23.8 kWh DC @ 100% DOD
3.04 kWh DC @ 80% DOD
3.8 kWh DC @ 100% DOD
3.04 kWh DC @ 80% DOD
MAX Discharge Rate (10 minutes)80 Amps DC (2.05 kW DC)80 Amps DC (4.1 kW DC)
MAX Continuous Discharge Rate75 Amps DC (1.9 kW DC)37.5 Amps DC (1.92 kW DC)
MAX Continuous Charge Rate75 Amps DC (1.9 kW DC)37.5 Amps DC (1.92 kW DC)
DC Voltage Range124 VDC to 28 VDC48 VDC to 56 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
Weight86 lbs. (39.0 kg)86 lbs. (39.0 kg)
Dimensions13.5 x 14 x 8 in. (15.5” H w/terminals) / 0.88 ft3
(34.3 x 35.6 x 20.3 cm / 0.025 m3)
13.5 x 14 x 8 in. (15.5” H w/terminals) / 0.88 ft3
(34.3 x 35.6 x 20.3 cm / 0.025 m3)
Model NumberPHI3.8 24V 60 VTE BRKPHI3.8 48V 60 VTE BRK

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

10 year warranty

SimpliPhi has improved its warranty registration by making it available on their website. Please use the following link to register your batteries. If you do not register, the warranty will not be valid.

Green Power

  • Non-toxic and non-corrosive; no off-gassing
  • Non-hazardous manufacture and disposal; SimpliPhi products are recyclable


  • No risk of thermal runaway or fire
  • Operate within a range of -4F to 140F
  • SimpliPhi products do not require ventilation or toxic liquid cooling to prevent heat build-up
  • or thermal runaway, a characteristic of other lithium ion and cobalt-based batteries

Efficiency & Durability

  • Operate at 98% efficiency for 3,000-5,000+ cycles, many times the cycle life of lithium
    cobalt-based batteries
  • Allow daily cycles over 10-year warranty period (compared to one cycle per week for other lithium-based batteries)
  • Product life expectancy of 15-20 years
  • 1/5th the operating cost per kWh over warranty period, vs. other lithium-based systems
  • No special requirements for delivery and installation; drop-in replacement for traditional batteries within existing electrical infrastructure
  • Scalable, modular and light-weight. Ideal for small and large residential or commercial installations
  • Integration with all industry standard inverter charge controllers
  • No air conditioning or active ventilaton required



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