AccESS™ – Outback

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SimpliPhi your power with AccESS to a fully integrated energy storage and management solution

  • AccESS power security with safe, reliable, non-hazardous and efficient energy source
  • AccESS any power generation source with intelligent management
  • AccESS your own power when and where you need it – inside or outside your home or business
Where to Buy
  • Description
  • Specifications
  • Additional Info
  • Documentation


SimpliPhi Power designs and manufactures efficient, non-toxic and enduring energy storage and management systems that utilize lithium ferro phosphate (LFP). Based in California, SimpliPhi combines non-hazardous LFP chemistry with its proprietary cell and battery architecture, power electronics, battery management system (BMS) and assembly methods to create safe, reliable, durable and highly scalable on-demand power solutions. Available for the residential, commercial, military and emergency response markets, SimpliPhi Power storage solutions have been rigorously tested and passed operational performance requirements by the U.S. Army and Marine Corp. Integral to all SimpliPhi Power solutions is a proprietary management system that further optimizes the life-cycle, round-trip efficiency rate, performance and durability of its batteries. SimpliPhi Power storage system components are UL certified and the PHI 3.5 kWh 24V and 48V 60 Amp batteries are ETL Certified, UL 1973 Standard.

SIA (Standard Interconnection Agreement) customers: ESS allows for solar PV power to be self-consumed, curtailing PV production to prevent the export of power to the grid. Compatible with both string inverters and micro-inverters. NEM (Net Energy Metering) customers: add standby power and peak-shaving to a new or existing net-metered solar array Off-grid customers: ESS with 4.8 kW Solar MPPT combines power generation and energy management in a single package
Pre-programmed ESS for backup power, peak-shaving, and self-consumption of solar PV
Internal transfer switch automatically disconnects from the grid during power outages and provides standby power for critical circuits
Outdoor rated enclosure can be free-standing, or pad-mounted
Advanced LFP batteries with a 10,000 cycle / 10-year warranty
98% round trip efficiency
Remote monitoring by web browser or mobile device app
No thermal regulation, cooling, or risk of fire
Solar MPPT for DC-coupled or off-grid installations
Automatic Generator control for additional standby power
Wireless gateway for cell modem or WiFi connection


Dimensions (W x H x D) 29.5 x 76 x 20 in (w/feet), (75 x 193 x 51 cm)
Weight 700 lb (317.52 kg) (w/out batteries)
Enclosure Rating NEMA 3R Outdoor rated
Operating Temperature -4 to 122 °F | -20 to 50 °C
Mounting Free-standing or pad-mounted
Outback Power Radian GS8048A
Application On / Off Grid
AC Connections 1 Grid Port, 1 Generator Port
AC Output1 120/240V AC, 60 Hz
Rated / Peak Power2 (from battery) 8 / 9 kW (7 kW max)
Max Charge Rate 115A DC, 7.2 kW (30A AC @ 240V AC)
CEC Weighted Efficiency 92.50%
SimpliPhi Power PHI 3.5 kWh 48V DC 60 Amp (x4)
UL Rating UL 1973 Standard (ETL Certified)
Rated kWh Capacity @ C/2 14 kWh
Depth of Discharge3 up to 100%
Round Trip Efficiency 98%
Cycle Life 10,000+ (@ 80% DOD)
Warranty Period 10 years
Solar (select models)
Outback Power Charge Controller FLEXmax 80
Output Power (max) 4 kW
Charge Current (max) 80A DC
PV Array Voltage (max operating)( 145V DC
PV Array Voltage (max open circuit) 150V DC
Internet Connected Monitor/Command OPTICS RE

1.) 240V AC standard; 120V AC on request.
2.) Inverter rating; When operating from battery, kW rating limited to Battery kWh/2.
3.) Max operating conditions. Refer to warranty for recommended conditions.

Specifications are typical/nominal. Subject to change without notice.

Additional Info

DIMENSIONS (W x H x D): 29.5 x 76 x 20 in (w/feet), (75 x 193 x 51 cm)
WEIGHT: 700 lb (317.52 kg) (w/out batteries)

  • UN3480, Lithium Ion batteries, 9, II
  • UL and CE listed, UN/DOT and RoHS compliant components
  • Designed and built in California, USA