SimpliPHI 3.8 kWh 24V Lithium Ferro Phosphate Battery (by Briggs & Stratton)

SimpliPHI 3.8 kWh LFP Battery 24 V – Metal (by Briggs & Stratton) delivers the same ultra-safe, cobalt-free performance the PHI line is known for, in a 24-volt format ideal for smaller off-grid systems, telecom, RVs, marine and backup applications. A rugged powder-coated steel enclosure, smart protection electronics and unlimited parallel scalability make it a long-life building block for dependable energy storage.

• 3.8 kWh usable capacity (≈153 Ah @ 25.6 V nominal) — up to 100% DoD
• High-power output for motor starts and heavy loads (short-term surge; continuous discharge suited for 24 V inverters)
• 10,000 cycles at 80% DoD; 10-year limited warranty
• Cobalt-free Lithium Ferro Phosphate (LiFePO₄) chemistry for maximum safety and thermal stability
• Integrated BMS with cell balancing, over/under-voltage, over-current and temperature protection
• 98% round-trip efficiency; minimal self-discharge
• Wide operating range: –4 °F to 140 °F (–20 °C to 60 °C)
• Scalable: parallel multiple batteries to expand capacity as needs grow
• Field-serviceable DC breaker/OCPD; front-access terminals for clean installs
• Dimensions: 13.5″ W × 14″ H × 8″ D (15.5″ H with terminals) | Weight: 86 lb

Ultra-safe, cobalt-free chemistry

LFP cells virtually eliminate thermal runaway risk and toxic materials, allowing indoor or outdoor placement—even in occupied spaces—without active cooling or ventilation systems.

Smart protection, simple integration

An internal Battery Management System continuously monitors voltage, current and temperature to protect the pack and report accurate state of charge. Pair with most leading 24 V inverter/chargers for seamless operation.

Power when you need it

Deliver sustained power for everyday loads and short bursts for starting pumps, compressors or other inductive equipment—without compromising cycle life.

Built to last

Expect well over a decade of daily cycling. Low degradation (≤1% first year, ~0.4%/yr thereafter) keeps more of your original capacity working for you year after year.

Rugged metal enclosure

The powder-coated steel case shrugs off harsh environments and makes wall or shelf mounting straightforward. Front-facing breaker and terminals speed up commissioning and service.

Expandable by design

Start with one module and parallel more as your energy needs grow—no need to replace your original investment. Identical cable lengths ensure balanced current sharing across the bank.

Size

13.5″ W × 14″ H × 8″ D (15.5″ H with terminals)

Weight

86 lb