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Regular price $1,275.00 USD
Regular price Sale price $1,275.00 USD
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 SimpliPhi Power’s PHI 1.4™ 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 DC breaker On/Off switch and overcurrent protection (OCPD), the PHI 1.4 Battery delivers safe, highly efficient and cost-effective service over the life of both small recreational and residential installations, on or off-grid. Compatible with all industry-standard inverter charge controllers, the PHI 1.4 Battery supports balance-of-system equipment and optimizes any power generation source – solar, wind, grid, generator – with scalable, on-demand energy storage solutions for RVs, critical back-up and daily savings on electricity bills.


CHEMISTRY Lithium Ferro Phosphate (LFP)
The safest Lithium Ion chemistry available
No cobalt, risk of thermal runaway or fire
BMS Built-in Battery Management System
CONNECTORS Threaded Terminal
COMPATIBILITY Compatible 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
MAINTENANCE Maintenance-free
No ventilation, cooling or thermal regulation required


PHI 1.4™ 12V 24V
DC Voltages – Nominal 12.8VDC 25.6VDC
Amp-Hours 115 Ah 57 Ah
Rated kWh Capacity @ C/2 1.4 kWh DC @ 100% DOD
1.12 kWh DC @ 80% DOD
1.4 kWh DC @ 100% DOD
1.12 kWh DC @ 80% DOD
MAX Discharge Rate (10 minutes) 100 Amps DC (1.2 kW DC) 60 Amps DC (1.53 kW DC)
MAX Continuous Discharge Rate 57 Amps DC (0.69 kW DC) 28.5 Amps DC (0.73 kW DC)
MAX Continuous Charge Rate 57 Amps DC (0.69 kW DC) 28.5 Amps DC (0.73 kW DC)
DC Voltage Range1 12 VDC to 14 VDC 24 VDC to 28 VDC
Depth of Discharge1 up to 100% up to 100%
Operating Efficiency 98% 98%
Charge Temperature1 32° 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 Temperature1 6 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 Life 10,000+ (@80% DOD) 10,000+ (@80% DOD)
Memory Effect None None
Warranty Period 10 Years 10 Years
Weight 33 lbs (15.1 kg) 33 lbs (15.1 kg)
Dimensions 11.25 x 9.25 x 7.25 inches/0.37 ft3
(23.495 x 28.575 x 18.415 cm/0.010m3)
11.25 x 9.25 x 7.25 inches/0.37 ft3
(23.495 x 28.575 x 18.415 cm/0.010m3)

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


“SimpliPhi batteries eliminated the most difficult challenges we face when building microgrids in remote tropical locations. The batteries are much easier to transport and they have a good chance of lasting the entire 20 years. This means SimpliPhi batteries generally pay for themselves in under 4 years!”
Offgrid Tech’s Kevin Kellenberger, Papua New Guinea, July 2018

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Add 3 more business days for all Generac Products


For Generac Generator Installations only:

Generac Installation Checklist

Complete Permits

Additional considerations may include contacting
your homeowners association. The
installation cannot begin until all
required permits have been issued.

Permits include:
• Site Survey
• Electrical Permit
• Plumbing Permit
• Building Permit

Upgrade Fuel System
• Gas meter/LP tank (if required)
• Contact underground utility

Electrical Service
• Day of installation
• Inspection (if required)

Install Generator
• Level chosen location
• Install base
• Mount transfer switch
• Run conduit and wiring
• Install fuel line

Follow Up
• Activation
• Demo a simulated outage and turnover the generator keys
• Fuel pressure check
• Final inspection (if required)
• Review service and monitoring