SimpliPHI 3.8 kWh LFP 48V Battery with Integrated BMS w/ Communications (by Briggs & Stratton)

SimpliPHI 3.8 kWh LFP Battery 48 V – Integrated BMS w/ Communications (includes 4′ CAT5 cable & terminator) delivers safe, cobalt-free lithium storage with plug-and-play networking for closed-loop inverter control. Housed in a rugged metal enclosure, it pairs a smart internal BMS with an accessible DC breaker for fast, code-compliant installs and decades of daily cycling.

• 3.8 kWh usable capacity (75 Ah @ 51.2 V) — up to 100% DoD
• Approx. 5.1 kW (100 A) 10-minute discharge; 1.9 kW (37.5 A) continuous charge/discharge
• Integrated BMS with closed-loop communications for leading 48 V inverters
• Includes 4′ CAT5 networking cable, RJ45 terminator plug and dust cover
• Scalable to 75 batteries per system (≈285 kWh total)
• Operating window: –4 °F to 140 °F (–20 °C to 60 °C)
• Integrated 100 A hydraulic/magnetic DC breaker & over-current protection
• Cobalt-free Lithium Ferro Phosphate chemistry for maximum safety
• 10,000 cycles @ 80% DoD; 10-year limited warranty

Integrated, communications-ready BMS

The built-in Battery Management System reports state of charge and critical diagnostics over closed-loop CAN/RS-485 style comms, streamlining commissioning and optimizing inverter performance.

Everything you need to network

Each unit ships with a 4′ CAT5 cable, RJ45 terminator and dust cover. Daisy-chain batteries and close the loop at the last unit—no extra parts to hunt down.

High power on demand

Deliver up to 5.1 kW for short surges and 1.9 kW continuously from a single module—ideal for motor starts and heavy household loads without stressing the cells.

Ultra-safe LFP chemistry

Cobalt-free Lithium Ferro Phosphate virtually eliminates thermal runaway risk and toxic coolants while offering superior thermal stability and long cycle life.

Grows with your system

Parallel up to 75 batteries (≈285 kWh) for whole-home or light-commercial storage. Identical cable lengths ensure balanced current sharing across the bank.

Built for harsh conditions

Operate from –4 °F to 140 °F, store down to –4 °F. The powder-coated steel case and integrated breaker enhance durability and safety in demanding environments.

Size

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

Weight

86 lb