Simpliphi Power PHI 3.4kWh Smart Tech Lithium Battery, 24V

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SimpliPhi Power
Lithium Ferro Phosphate (LFP)
Deep Cycle Batteries

Looking for a lightweight, non-toxic, and maintenance-free energy storage solution? SimpliPhi deep-cycle Lithium Ferro Phosphate (LFP) batteries are optimized with proprietary cell architecture, power electronics, BMS and assembly methods. They are a drop-in replacement for lead acid batteries, and much safer. LFP is the safest, most environmentally benign LIon chemistry available (see DOCUMENTS tab for LFP Safety Comparison). They are modular, lightweight and scalable for installations that range from kWh to MWh. The batteries provide 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 mobile.

And these batteries are easy to size! For example, if 1500 Wh of energy is required daily for 3 days without sunshine (days of autonomy), and you have an inverter with 93% efficiency, you calculate 1500 Wh X 3 days/.93/.80 DoD = 6048 Wh battery bank. If you have a 24V system, you could use two (2) of the 3440 Wh 24V SimpliPhi Smart-Tech batteries in parallel for 6880 Wh capacity. Additional batteries can be added in parallel as your power needs increase.

NO maintenance, NO cooling, and NO ventilation required!


  • SimpliPhi Smart-Tech Batteries must be wired in parallel only. Wiring in series will VOID the warranty. Wire lengths between the batteries should be identical in length and gauge in order to balance the load across all batteries. 4 AWG is the most commonly used size. See Wiring Guide in DOCUMENTS tab above.
  • As with any battery technology, do not reverse polarity when installing. Doing so will void the warranty. Use a Digital Multimeter to check polarity before connecting terminals.
  • As a best practice, it is not recommended to mix and match different capacity batteries (even if the same voltage). The system will work initially, but over time each battery would be running at a different internal C Rate. This leads to the smaller capacity battery wearing faster than the larger one.

  • Long cycle life -product life expectancy of 15 - 20 years
  • Modular system allows storage capacity to be easily expandable as power needs increase
  • Does not require ventilation, cooling, or thermal regulation - eliminating the risks of thermal runaway and heat build-up
  • Can be stored in freezing temperatures without affecting capacity (ie. arctic installations)
  • No AC or toxic liquid cooling - negligible parasitic drain
  • Built-in accessible 80 Amp DC breaker On/Off switch - increases safety and simplifies installations (ie. no need for Disconnecting Combiner Box)
  • Proprietary architecture and integrated Battery Management System (BMS) - no additional programming, firmware, or wiring
  • Compatible with all industry standard 24V or 48V inverters and charge controllers (Integration Guides available for Schneider, Outback, Midnite, Magnum, SMA, and more)
  • Operates at unparalleled 98% efficiency for more than 5,000 cycles
  • Can be rack mounted or wall mounted in a dead space area of your home/business
  • Offers up to 100% depth of discharge
  • Non-toxic and non-hazardous recylcable materials - recycle at end of life (**however they do ship HazMat)
  • Provides 80% savings in operating cost per kWh vs competing batteries
  • UL and CE listed, UN/DOT and RoHS compliant components
  • Made in California, USA
  • 10 Year Warranty

    Specifications: PHI 655 - 12V PHI 655 - 24V PHI 1310 - 12V PHI 1310 - 24V
    DC Voltage Nominal 12.8V 25.6V 12.8V 25.6V
    Amp Hours 51.2 Ah 25.6 Ah 102.4 Ah 51.2 Ah
    Rated Wh Capacity 655 Wh 1310 Wh
    Max Discharge Current (C/2) 50A 25A 60A
    Max Charge Current (C/2) 25A 12.5A 50A 25A
    DC Voltage Range 10V - 14.4V 20V - 28.8V 10V - 14.4V 20V - 28.8V
    Depth of Discharge up to 100%
    Operating Efficiency 98%
    Operating Temperature -4 to 140°F (-20 to 60°C)
    Charge Temperature 32 to 120°F (0 to 49°C)
    Self Discharge Rate Less than 1% loss/ month
    Cycle Life 10,000 (80% DoD)
    Memory Effect None
    Dimensions 11.25 x 5.25 x 6.25 inches/0.21 cu ft 
    (28.58 x 13.34 x 15.88 cm/0.006m3)
    11.25 x 9.25 x 6.25 inches/0.37 cu ft 
    (23.5 x 28.5 x 15.9 cm/0.010m3)
    Weight 16.2 lbs (7.35 kg) 32.65 lbs (14.8 kg)


    PHI 2.6 - 24V PHI 2.6 - 48V PHI 3.4 - 24V PHI 3.4 - 48V
    DC Voltage Nominal 25.6V 51.2V 25.6V 51.2V
    Amp Hours 102.4 Ah 51.2 Ah 134 Ah 67 Ah
    Rated Wh Capacity 2621 Wh 3440 Wh
    Max Discharge Current (C/2) 60A
    Max Charge Current (C/2) 45A 25A 45A 33A
    DC Voltage Range 20V - 28.8V 40V - 57.6V 20V - 28.8V 40V - 57.6V
    Depth of Discharge up to 100%
    Operating Efficiency 98%
    Operating Temperature -4 to 140°F (-20 to 60°C)
    Charge Temperature 32 to 120°F (0 to 49°C)
    Self Discharge Rate Less than 1% loss/ month
    Cycle Life 10,000+
    Memory Effect None
    Dimensions 11.25 x 11 x 9.5 inches / 0.68 cu ft 
    (28.57 x 27.94 x 24.13 cm / 0.019 m3)
    13.5 x 14 x 8 inches / 0.88 cu ft 
    (34.29 x 35.56 x 20.32 cm / 0.025 m3)
    Weight 57.5 lbs (26.1 kg) 75.5 lbs (34.8 kg)

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