AccESS™ AmpliPHI™

a fully integrated energy storage & management solution with closed loop communications and Sol-Ark equipment

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SimpliPhi Power’s AccESS™ with AmpliPHI™ 3.8kWh batteries and Sol-Ark inverter is a fully integrated and pre-programmed energy storage and management solution with closed-loop communications that self-monitors, keeps the lights on and lowers utility bills, creating peace of mind for homeowners and businesses.

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SimpliPhi Power’s AccESS™ with AmpliPHI™ 3.8kWh batteries and Sol-Ark inverter is a fully integrated and pre-programmed energy storage and management solution with closed-loop communications that self-monitors, keeps the lights on and lowers utility bills, creating peace of mind for homeowners and businesses. The AccESS maximizes PV generation by storing excess power for critical backup, evening hours and daily self-consumption to offset Time-Of-Use rates. Net-Metered customers can add energy storage to existing grid-tied solar systems for standby power or energy arbitrage. Off-grid customers can take advantage of integrated MPPT charge controls to create stand-alone systems for whole-home power and generator optimization with auto start capabilities. The UL 9540 Certified AccESS AmpliPHI system scales easily to increase energy capacity with the BOSS.6 or BOSS.12 that automatically recalculates, reprograms and reconfigures settings in the Sol-Ark inverter, creating resilience, energy security and daily cost savings with 98% efficient, safe and reliable access to power – 24/7.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 manufacturing methods to create safe, reliable, durable and highly scalable on-demand power solutions. Available for the residential, commercial, military and emergency response markets, SimpliPhi storage solutions have been rigorously tested and passed operational performance requirements by the U.S. Army and Marine Corps. Integral to all SimpliPhi solutions is a proprietary management system that further optimizes the life-cycle, round-trip efficiency rate, performance and durability of its batteries. SimpliPhi PHI 3.8 kWh 48V 60 Amp batteries are Certified to UL 1973 Standard.

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 cobalt , thermal regulation, cooling, or risk of fire
Extended operating temperature
Solar MPPT for DC-coupled or off-grid installations
Automatic Generator control for additional standby power
SIA (Standard Interconnection Agreement) customers: AccESS allows for solar PV power to be stored in batteries for a backup power source, or for self-consumption during evenings or other set times.
NEM (Net Energy Metering) customers: Add energy storage to an existing net-metered solar array for standby power or energy arbitrage purposes.
Off-grid customers: Up to 12 kW Solar MPPT combines power generation and energy management in a single package.
Disaster recovery customers: Reliable, 98% efficient, non-toxic backup power in the event of a power outage.


“After Hurricane Maria hit PR, SimpliPhi made our transition to solar energy a breeze. Now our guesthouse is always energized and environmentally friendly”
Harmony Guesthouse, Puerto Rico – August 2018


AccESS AmpliPHI Sol-Ark 12k
Dimensions (W x H x D) 29.5” W x 76”H (w/feet) x 20” D / 75 cm W x 193 cm H x 51 cm D
Weight 600 lb (272.16 kg) (w/out batteries)
Enclosure Rating NEMA 3R Outdoor rated
Operating Temperature -4°F to 122°F (-20°C to 50°C)
Charging Temperature (batteries) 32°F to 120°F (0 °C to 49°C)
Mounting Free-standing or Pad-mounted
Enclosure Warranty Period 2 years
Certifications UL1741SA Rule 21, HECO Rule 14H, PREPA approved and Rapid Shutdown compliant UL 9540, included batteries ETL certified and certified to UL 1973
Sol-Ark Sol-Ark 12K
Application On or Off-Grid
AC Connections 1 Bi-Directional Grid Port (63A double-pole), 1 UPS Load Output (50A double-pole), 1 Generator Port (63A double-pole); can be used for Smart Loads output
Output Frequency (selectable) 60 Hz or 50 Hz
Output Voltage L-N: 120VAC; L-L: 240VAC | L-L: 208VAC (2/3 phases in 1X and 2X Sol-Ark 12K configurations, 3/3 phases in 3X Sol-Ark 12K quantity configurations) | 230VAC
Off-Grid Output Power System 9 kW Continuous
Solar PV Continuous Power 12 kW
Inverter AC Continuous Power 9 kW
Inverter Battery Continuous Power (MAX) To grid: 9 kW per Sol-Ark 12K
Max Output Charging Current 185 ADC
CEC Weighted Efficiency 96.5%
Warranty Period 10 yr standard
Parallel Stacking Yes (needed for true 3 phase power)1
Other Features EMP hardened upon request (against Nuclear EMP and Solar Flare) EMP protection does not include the paired batteries, Smart Load capabilities (CTs included)
Solar PV – DC Coupled
Sol-Ark Dual MPPT 1 – 6 PV String Inputs (3 max per MPPT)
Max Connected PV Power 13kW
12 kW max simultaneous utilization
Min PV Array Starting Voltage 175 VDC
Max Open Circuit PV Array Voltage 500 Voc per PV String
MPPT Voltage Range 150 – 425 VDC
Max Array Short Circuit Current 33A per MPPT
Max Array Operating Current 20A per MPPT @ 300V | 18A per MPPT @ 400V
Other Features
Internet Connected
Computer or Phone App
PowerView ES Monitor and Programming
Communications Closed loop communications between batteries and Sol-Ark inverter
Automatic Generator Start Two-Wire Automatic Generator Start
SimpliPhi Power AmpliPHI 3.8 kWh-48V
Rated kWh Capacity @ C/2 19 kWh, up to 136.8 kWh with additional BOSS cabinets
Usable kWh Capacity @ 80% DoD 15.2 kWh, up to 109.4 kWh with additional BOSS cabinets
Max Combined Output Power 11.4 kW DC or up to 69.1 kW DC (limited to up to 27 kW AC by up to 3 x Sol-Ark 12K’s)
Max Combined Charge Current 225 ADC
Charging Temperature 32°F to 120°F (0°C to 49°C)
Depth of Discharge3 up to 100% DoD
Round Trip Efficiency 98%
Cycle Life 10,000+ (@ 80% DOD)
Warranty Period 10 years

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

  • UN3480, Lithium Ion batteries, 9, II
  • Certified to UL 9540
  • UL and CE listed, UN/DOT and RoHS compliant components
  • Manufactured in the United States


SimpliPhi’s AmpliPHI Battery Communications Setup w/ Sol-Ark