Epoch Original Series LiFePO4 Batteries (Heated, Bluetooth)

The Epoch Original Series covers the higher-voltage corners of the lineup — 24V, 36V, and 48V deep-cycle LiFePO4 batteries with integrated self-heating, built-in Bluetooth, and a sealed, weather-resistant case. These are the batteries reached for in trolling-motor banks, 48V house systems, and off-grid setups where you want a single higher-voltage block instead of stacking a pile of 12V units.

Available in 24V 100Ah, 36V 100Ah, and 48V 50Ah, plus a compact 12V 50Ah, all monitored over Bluetooth and protected by a smart BMS.

Key Features

• Integrated self-heating — warms the cells for safe charging in sub-freezing conditions.
• Bluetooth monitoring — state of charge, voltage, current, and health from the Epoch app.
• Higher native voltages — 24V, 36V, and 48V blocks reduce parallel wiring and current in larger systems.
• Smart BMS — over-charge, over-discharge, over-current, short-circuit, and temperature protection.
• Weather-resistant sealed housing for marine and outdoor installs.
• 3,500+ cycle life, maintenance-free.

Specifications by Model

Epoch Original 12V 50Ah (B1250B)

• Nominal voltage: 12.8 V; capacity: 50 Ah
• LiFePO4 deep-cycle with self-heating and Bluetooth
• Smart BMS protection; 3,500+ cycle life
• (See product images and the Epoch datasheet for full electrical and dimensional specifications.)

Epoch Original 24V 100Ah (B24100A-C)

• Nominal voltage: 25.6 V; capacity: 100 Ah (2.56 kWh)
• Cell configuration: 8S
• Max continuous discharge: 120 A; max continuous charge: 100 A (150 A for 10 s); peak 200 A (60 s)
• Max charge voltage: 29.2 V
• Series / parallel: up to 2 in series or 4 in parallel
• Charge temp: −20°C to 55°C (with self-heating); discharge −20°C to 60°C
• Bluetooth + self-heating; 3,500+ cycles
• Dimensions: 13 × 10.25 × 11 in; weight 48.5 lb

Epoch Original 36V 100Ah (B36100A-A)

• Nominal voltage: 38.4 V (36 V class); capacity: 100 Ah (3.84 kWh)
• Cell configuration: 12S
• Max continuous discharge: 120 A; max continuous charge: 100 A (150 A for 10 s); peak 200 A (60 s)
• Max charge voltage: 43.8 V
• Parallel: up to 4 in parallel
• Charge temp: −20°C to 55°C (with self-heating); discharge −20°C to 60°C
• Bluetooth + self-heating; 3,500+ cycles
• Dimensions: 20 × 10.25 × 11 in; weight 75 lb

Epoch Original 48V 50Ah (B4850A)

• Nominal voltage: 51.2 V; capacity: 50 Ah
• Cell configuration: 16S
• Max continuous discharge: 100 A; max continuous charge: 100 A (150 A for 10 s); peak 150 A (30 s)
• Max charge voltage: 58.4 V
• Series / parallel: up to 2 in series or 4 in parallel
• Charge temp: −20°C to 55°C (with self-heating); discharge −20°C to 60°C
• Bluetooth + self-heating; 3,500+ cycles
• Dimensions: 14.75 × 15.25 × 11.5 in; weight 66 lb

Warranty

Epoch backs the Original Series with an 11-year limited warranty: full repair or replacement (parts and labor) in years 1–5, then a comparable battery at 25% off MSRP in years 6–11. The warranty is non-transferable; register your battery within 90 days of purchase so coverage starts from your purchase date.

Blue Marine is an authorized Epoch Batteries dealer — every Original Series battery ships brand-new with Epoch's 11-year limited warranty (full replacement in years 1–5), free shipping, and local pickup available.