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SimpliPhi Power’s AmpliPHI 3.8™ Battery with communications 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.

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The AmpliPHI features a Battery Management System (BMS) with closed loop communications pre-configured with Sol-Ark inverters that reports SOC and other critical real-time data, optimizing the value of storage and functionality within balance-of-system equipment. Combined with our proven overcurrent protection (OCPD) and accessible 100 Amp DC breaker On/Off switch, installation time is reduced and safety is increased during set-up for residential and commercial systems, on and off-grid. Designed to scale up to 40 batteries, the AmpliPHI will offer pre-configured communications with other inverter manufacturers, to be announced soon.

CHEMISTRYLithium Ferro Phosphate (LFP)
The safest Lithium Ion chemistry available
No cobalt, risk of thermal runaway or fire
OCPDBuilt-in accessible 100 Amp DC breaker On/Off switch
BMSBuilt-in Battery Management System with Communications
COMPATIBILITYCompatible with Sol-Ark, SMA (pending) & Schneider (pending) Inverters
No ventilation, cooling or thermal regulation required


AmpliPHI 3.8 kWh ModuleAmpliPHI 48V
DC Voltages – Nominal51.2 VDC
Amp-Hours75 Ah
Rated kWh Capacity @ C/23.8 kWh DC @ 100% DOD
3.04 kWh DC @ 80% DOD
Maximum Quantity Per System40 (152 kWh)
MAX Discharge Rate (10 minutes)100 Amps DC (5.1 kW DC)
MAX Continuous Discharge Rate37.5 Amps DC (1.9 kW DC)
MAX Continuous Charge Rate37.5 Amps DC (1.9 kW DC)
DC Voltage Range148 VDC to 56 VDC
Depth of Discharge1up to 100%
Charge Temperature132° to 120°F (0° to 49°C)
Operating Temperature1-4° 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)
Self-Discharge Rate<1% loss per month
Cycle Life10,000+ (@80% DOD)
Memory EffectNone
Warranty Period10 Years
Weight86 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)
Model NumberAMPLIPHI 3.8 48v

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


Any SimpliPhi battery with terminals follows these same guidelines.


SimpliPhi PHI Battery Product Series Overview

Be Green Solar Demonstrates Lead Acid Battery Replacement with SimpliPhi Power Batteries

How to Connect a Lug to the Terminals on a SimpliPhi Power Battery

Connecting a Busbar to Terminals on a SimpliPhi Battery

Paralleling PHI Batteries with Threaded Studs Using Battery Cables

Paralleling PHI Batteries Using Busbars


Need help sizing your battery bank? Use either our Quick PHI 3.8 Battery Bank Calculator or the System-Based PHI Battery Bank Calculator.

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