Epoch Essential Series LiFePO4 Batteries (Bluetooth, Heated)

The Epoch Essential Series is a clean, no-fuss LiFePO4 battery line built for everyday house power on boats, RVs, vans, and off-grid cabins. Most models add an integrated self-heating system for safe charging in the cold and built-in Bluetooth so you can keep an eye on state of charge, voltage, and current right from your phone. It's a straightforward, maintenance-free way to drop lithium into a system without overcomplicating things.

Available from a compact 12V 50Ah all the way up to a 12V 460Ah house bank, plus a 36V 50Ah option and a Group 31 dual-purpose model that adds engine-cranking muscle.

Key Features

• Self-heating on most models — the battery warms its own cells so it can charge safely down to −20°C (−4°F). (The 12V 50Ah is a non-heated Bluetooth model.)
• Built-in Bluetooth monitoring — check capacity, voltage, current, and battery health from the Epoch app on iOS or Android.
• Smart BMS — protects against overcharge, over-discharge, over-current, short circuit, and temperature extremes.
• Expandable — connect in series and parallel (per model) to build the voltage and capacity your system needs.
• Dual-purpose option — the Group 31 172Ah model delivers 1,000 A cranking for outboards and starting loads alongside deep-cycle house duty.
• Maintenance-free with a long LiFePO4 service life (3,500–4,000+ cycles depending on model).

Specifications by Model

Epoch Essential 12V 50Ah (1250A-ES) — Bluetooth

• Nominal voltage: 12.8 V; capacity: 50 Ah (0.64 kWh)
• Cell configuration: 4S
• Max continuous discharge: 50 A; max continuous charge: 50 A
• Peak discharge: 170 A (3 s)
• Max charge voltage: 14.6 V
• Series / parallel: up to 4 in series or 4 in parallel
• Charge temp: 0°C to 55°C (non-heated model); discharge −20°C to 60°C
• Bluetooth monitoring
• Dimensions: 9 × 5.63 × 8.25 in; weight 14 lb

Epoch Essential 12V 105Ah (12105A-H) — Bluetooth, Heated

• Nominal voltage: 12.8 V; capacity: 105 Ah (1.34 kWh)
• Cell configuration: 4S1P
• Max continuous discharge: 105 A; max continuous charge: 100 A
• Peak discharge: 200 A (10 s)
• Max charge voltage: 14.6 V
• Series / parallel: up to 4 in series or 4 in parallel
• Charge temp: −20°C to 55°C (with self-heating); discharge −20°C to 60°C
• Cycle life: 4,000+; Bluetooth + self-heating
• Dimensions: 10.25 × 6.75 × 9 in; weight 22.1 lb

Epoch Essential 12V 172Ah Dual-Purpose (12172A-DP) — Group 31, Bluetooth, Heated

• Nominal voltage: 12.8 V; capacity: 172 Ah (2.20 kWh) — Group 31
• Cell configuration: 4S1P
• Max continuous discharge: 200 A; max continuous charge: 200 A
• Cranking / peak discharge: 1,000 A (5 s)
• Max charge voltage: 15.0 V
• Series / parallel: up to 4 in parallel
• Charge temp: −5°C to 55°C (with self-heating); discharge −20°C to 60°C
• Cranking + deep-cycle dual-purpose; Bluetooth + self-heating
• Dimensions: 12.91 × 6.22 × 8.46 in; weight 40 lb

Epoch Essential 12V 300Ah (12300A-H) — Bluetooth, Heated

• Nominal voltage: 12.8 V; capacity: 300 Ah (3.84 kWh)
• Cell configuration: 4S1P
• Max continuous discharge: 200 A; max continuous charge: 200 A
• Peak discharge: 400 A (3 s)
• Max charge voltage: 14.6 V
• Series / parallel: up to 4 in series or 4 in parallel
• Charge temp: −20°C to 55°C (with self-heating); discharge −20°C to 60°C
• Cycle life: 4,000+; Bluetooth + self-heating
• Dimensions: 13.75 × 7.63 × 10 in; weight 58 lb

Epoch Essential 12V 460Ah (12460A-H) — Bluetooth, Heated

• Nominal voltage: 12.8 V; capacity: 460 Ah (5.89 kWh)
• Cell configuration: 4S2P
• Max continuous discharge: 200 A; max continuous charge: 200 A
• Peak discharge: 400 A (10 s)
• Max charge voltage: 14.6 V
• Series / parallel: up to 4 in series or 4 in parallel
• Charge temp: −20°C to 55°C (with self-heating); discharge −20°C to 60°C
• Cycle life: 4,000+; Bluetooth + self-heating
• Dimensions: 20.55 × 9.45 × 8.60 in; weight 84 lb

Epoch Essential 36V 50Ah (3650A-H) — Bluetooth, Heated

• Nominal voltage: 38.4 V (36 V class); capacity: 50 Ah (1.92 kWh)
• Cell configuration: 12S
• Max continuous discharge: 100 A; max continuous charge: 100 A
• Peak discharge: 130 A (10 s)
• Max charge voltage: 43.8 V
• Series / parallel: up to 4 in parallel (single, not for series)
• Charge temp: −20°C to 55°C (with self-heating); discharge −20°C to 60°C
• Cycle life: 4,000+; Bluetooth + self-heating
• Dimensions: 13.0 × 6.8 × 9.44 in; weight 35 lb

Warranty

Epoch backs the Essential Series with an 11-year limited warranty: full repair or replacement (parts and labor) in years 1–3, a comparable battery at 40% off MSRP in years 4–5, then 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 Essential Series battery ships brand-new with Epoch's 11-year limited warranty, free shipping, and local pickup available.