SimpliPHI 3.8 kWh 48V Lithium Ferro Phosphate Battery (by Briggs & Stratton)

The SimpliPHI 3.8 kWh LFP Battery 48 V brings safe, long-lasting lithium energy storage to homes and businesses. Built around cobalt-free Lithium Ferro Phosphate (LFP) cells and housed in a rugged powder-coated steel enclosure, the PHI 3.8 delivers high power, extreme cycle life and seamless integration with most 48 V inverters.

• 3.8 kWh usable capacity (75 Ah at 51.2 V)
• Up to 100 % depth-of-discharge – 10 000 cycles @ 80 % DoD
• 60 A (3.07 kW) 10-min surge, 37.5 A (1.92 kW) continuous output
• Built-in 80 A DC breaker and smart BMS for protection
• 98 % operating efficiency
• Wide operating range: –4 °F – 140 °F (–20 °C – 60 °C)
• UL 1973, UN 3480 & RoHS compliant; non-toxic, recyclable materials
• 10-year / 10 000-cycle manufacturer warranty

Scalable 3.8 kWh building block

Each PHI 3.8 stores 3.8 kWh of energy and can be paralleled to create battery banks from a few kilowatt-hours to megawatt-hours, letting you start small and grow as your energy needs increase.

Ultra-safe, cobalt-free chemistry

Lithium Ferro Phosphate eliminates cobalt, removing the risk of thermal runaway, toxic coolants and fire propagation. The result is the safest lithium chemistry available for indoor or outdoor installations.

High power on demand

The battery can deliver up to 3.07 kW for 10 minutes and 1.92 kW continuously, easily starting motors and supporting large household loads while maintaining 98 % round-trip efficiency.

No active cooling required

An integrated BMS constantly monitors cell temperatures and state of charge, allowing reliable operation from –4 °F to 140 °F without fans, compressors or parasitic drain.

Engineered for decades of service

Expect more than 10 000 cycles at 80 % depth of discharge—well over 15 years of daily cycling—backed by a 10-year warranty.

Durable metal enclosure

The powder-coated steel case withstands demanding environments and makes wall mounting straightforward. Dimensions are 13.5 × 14 × 8 in (15.5 in H with terminals) and weight is 86 lb, so each module remains easy to handle on site.

Size

13.5" × 14" × 8" (15.5" H with terminals)

Weight

86 lb