BatteryBlueprint
Back to Catalog
Premium ClassLiFePO4DC CoupledData Confidence: High

SimpliPhi

PHI 3.8

The SimpliPhi PHI 3.8 is renowned for its military-grade durability and extreme temperature tolerance. It is a premium LFP battery designed for harsh environments and demanding off-grid applications.
Size This System for Your Home
Data verified 2026-05-12
Best Considered For
  • Off-grid cabins and remote installations
  • Environments with extreme temperature fluctuations
  • Pairing with Sol-Ark or Outback inverters
May Be Less Suitable When
  • Budget residential grid-tied systems
  • Outdoor installations lacking weatherproof enclosures

Engineering Verdict

SimpliPhi has engineered a battery that prioritizes cell integrity over consumer flashiness. With a staggering 10,000-cycle life rating and an 80% end-of-life capacity guarantee, it outlasts nearly everything on the market. Its ability to operate safely at up to 60°C without active cooling speaks to the exceptional quality of its internal BMS and cell chemistry. However, its 1.92 kW continuous output per unit means several must be paralleled to handle modern household loads.

Real-World Considerations

This is an industrial-grade product priced accordingly. It does not offer a slick consumer app or integrated inverters. It is best considered where failure is not an option, relying on rugged third-party inverters to manage power flow.

Installation Notes

The units are relatively compact and weigh 33 kg, making them easy to rack-mount or wall-mount using proprietary brackets. Heavy-gauge DC cabling is crucial when paralleling multiple units to ensure balanced resistance.

Technical Specifications

Usable Capacity

3.8 kWh

Continuous Output

1.92 kW

Peak Output

3.8 kW (10s)

Chemistry

LiFePO4

Official Sources

Links lead directly to official manufacturer or regulator documentation. BatteryBlueprint does not use affiliate links for hardware specifications.

Economics

Estimated Cost

$2,800 - $3,500

Reliability

Warranty

10 Years

Cycle Life (Est.)

10,000

End of Life Capacity

80% Retention

Certifications

UL 1973UN 3480
Physical Specs
Weight33 kg
Dimensions343h x 356w x 203d mm
IP RatingIP20
Temp Range-20°C to 60°C
LocationIndoor

Disclaimer: Battery specifications are provided for planning and educational purposes only. Always verify compatibility, certification, warranty terms, and installation requirements with the manufacturer and a qualified installer before purchasing. BatteryBlueprint compiles this data from publicly available datasheets and official manufacturer releases; specifications may change without notice or vary by local grid regulations.