








Epoch Original Series LiFePO4 Batteries (Heated, Bluetooth)
Free shipping over $49
60-day hassle-free returns
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.
Warranty Information
Shipping & Returns
We offer free shipping over $49. Lithium batteries & oversize items may have an applicable shipping charge.
We know returns are no fun so we aim to make the return process as hassle free as possible! We have a 60-day return policy, which means you have 60 days after receiving your item to request a return.
Lithium batteries and products with lithium batteries inside are non returnable: Due to carrier regulations surrounding the shipment of lithium batteries (classified as a fully regulated hazardous material), we are unable to accept returns unless arranged locally. We appreciate your understanding and encourage you to contact us with any questions prior to purchase.
For more information on returns, visit our return policy page.
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