Epoch 48V 125Ah Essential Series 48125A-COMM | LiFePO4 Battery (6.4kWh) | Heated, Bluetooth, Victron CAN

A heated 48V deep-cycle LiFePO4 battery for off-grid, solar, RV, van and boat house power, with Bluetooth monitoring and Victron GX communication.

The Epoch 48V 125Ah Essential Series (model 48125A-COMM) stores 6.40kWh (6,400Wh nominal, 51.2V) in one battery. It delivers and accepts up to 150A continuously, supplies 300A for up to 10 seconds for start-up surges, uses incoming charger current to heat its cells so it can charge in freezing weather, balances its 16 cells with a 2A active balancer, and reports to the Epoch Li-Ion app over Bluetooth and to Victron Cerbo GX and Ekrano GX devices over CAN. Each battery weighs 110 lb in a 25.2 × 9.65 × 8.66 in IP54 case, and up to 15 can be connected in parallel.

Key Features

• 48V 125Ah Essential Series LiFePO4 (6.40kWh): Heated 48V deep-cycle power for off-grid and solar storage, RV, van and boat house power, golf carts and backup systems, storing 6,400Wh (nominal, 51.2V) in one battery built for a dry, protected location.
• Victron CAN Comms: Reports to a Victron Cerbo GX or Ekrano GX over CAN-bus. With DVCC on, the GX applies the battery's charge voltage limit and discharge current limit to the Victron chargers and inverter chargers, and the battery's integrated shunt supplies state of charge, so a separate battery monitor is not required. Linked batteries select a master automatically, with no DIP switches or addresses, and the GX shows the whole bank as one battery.
• Both Communication Cables Included: In the box with the battery are a battery-to-battery communication cable for linking RS485-OUT to the next battery's RS485-IN, and a master battery-to-Victron CAN cable that runs from the CAN port of Battery 1 (the first battery in the chain) to the GX's BMS-Can or VE.Can 2 port. Make only one CAN connection per bank.
• High-Output Power Delivery: 150A maximum continuous discharge and 300A peak for up to 10 seconds for start-up surges from inverters, motors and compressors. At 51.2V, 150A is about 7,680W of DC power before inverter losses; size the system by the inverter's DC input current, not its AC output, and keep any load lasting longer than 10 seconds at or below 150A.
• 150A Charging, 48V LiFePO4 Profile: Accepts up to 150A continuous charge from all sources combined, with up to 62.5A (0.5C) recommended. Program every source for 48V LiFePO4: 56.8V–57.6V bulk/absorption, float 54.0V–55.2V or off (preferred), equalization and temperature compensation disabled, and never program a charge voltage above 57.6V (58.0V is the maximum charge voltage).
• Heated for Cold-Weather Charging: Rated to charge from -30°C to 55°C (-22°F to 131°F) with internal heating. When the cells reach 0°C (32°F), the BMS stops charging and sends the incoming charge current from a connected charger (at least 0.5A) to the internal heating pads, never stored battery energy; charging resumes automatically when the cells reach 5°C (41°F). Discharge is rated from -20°C to 55°C (-4°F to 131°F).
• Bluetooth Monitoring: The Epoch Li-Ion app for iOS and Android shows state of charge, voltage, current, temperature and protection status, and switches charging and discharging on or off independently. While the POWER button has discharge switched off, the app cannot switch discharge on or off, and neither the app nor the button is a means of isolation; for storage or service, open a DC disconnect or remove the battery cables.
• 2A Active Cell Balancing: Moves charge between the 16 cells whenever their voltages differ by more than 0.015V, keeping them matched without user intervention.
• Smart BMS Protection: Built-in protection against overcharge, over-discharge, over-current, short circuit and high or low temperature, with an integrated shunt (0.2A accuracy on discharge) for state of charge. It does not replace correctly sized fuses or breakers.
• Parallel Expansion, No Series: Up to 15 matched 48125A-COMM batteries in parallel (1,875Ah / 96.00kWh at 51.2V). Series wiring is not approved for this model.
• IP54 Rated ABS Case: Dust-protected and splash-resistant, 25.2 × 9.65 × 8.66 in (640 × 245 × 220 mm), 110 lb (50 kg). IP54 is not waterproof: install it upright in a dry, protected location, and do not submerge it, pressure wash it or mount it where standing water can collect.
• 7,000+ Cycle Life & 11-Year Limited Warranty: Rated for 7,000+ cycles with no watering or acid service, and covered by an 11-year limited warranty (3 years of free replacement, then 40% off MSRP on a replacement battery through Year 11) against qualifying defects in materials and workmanship. Register within 90 days or keep your proof of purchase.

Key Benefits

• Splash & dust resistant (IP54): Protected against limited dust ingress and water splashes. Not waterproof or submersible.
• Cycle life (7,000+): Over 19 years at one full cycle a day. Rated at the depth of discharge, charge rate and temperature stated on the datasheet, to its end-of-life capacity.
• Bluetooth app (iOS + Android): Charge, voltage and temperature on your phone in the Epoch Li-Ion app.
• Protection (Advanced BMS): Guards against overcharge, over-discharge, overcurrent and short circuit.
• Cold weather (Self-heating): Warms its cells before charging, so it can charge in freezing weather.
• Thermal stability (LiFePO4): Lithium iron phosphate has a far lower thermal-runaway risk than other lithium chemistries. The BMS adds over-temperature and low-temperature charge protection.

Built for 48V off-grid and Victron systems

• Both cables included: Battery-to-battery & Victron CAN
• Victron communications: Cerbo GX & Ekrano GX over CAN
• 11-year limited warranty: 3 yrs free replacement
• Bluetooth monitoring: Epoch Li-Ion app
• Internal heating: Cold-weather charging
• 2A active balancing: 16 cells kept matched

Run 48V Inverter Systems on 150A Continuous Power

One 51.2V battery for 48V inverter chargers, solar banks and golf-cart controllers.

This 48V 125Ah LiFePO4 battery delivers and accepts up to 150A continuously. At 51.2V, 150A is about 7,680W of DC power before inverter losses. Size the system by the inverter's DC input current, not its AC output: it must stay within 150A per battery, and the AC output is lower because of conversion losses.

The 300A peak rating covers start-up surges from inverters, motors and compressors for up to 10 seconds; any load that lasts longer must stay at or below 150A. Set the inverter's low-voltage shutdown above the bottom of the operating range (41.6V) so the inverter stops before the BMS disconnects the battery, and use chargers, inverters, fuses and switches rated for a 48V (51.2V nominal) LiFePO4 system, up to 58.0V while charging.

Charger-Powered Internal Heating

Internal heating pads let the battery charge in freezing weather, for a charge temperature range of -30°C to 55°C (-22°F to 131°F) with internal heating. When the cells reach 0°C (32°F), the BMS stops charging and uses the incoming charge current to power the heater; charging resumes automatically when the cells reach 5°C (41°F). The heater runs only while a charger is connected and supplying at least 0.5A, and it never uses the battery's stored energy. Discharging works down to -20°C (-4°F) without heating.

Victron CAN, Battery Linking & Bluetooth

Connected to a Victron Cerbo GX or Ekrano GX over CAN-bus with DVCC on, the battery reports its state of charge, voltages, temperatures and alarms, and sends the charge voltage and discharge current limits that the Victron chargers and inverter chargers follow. Use the BMS-Can port on a Cerbo GX MK1, or VE.Can 2 set to 500 kbit/s on a Cerbo GX MK2 or Ekrano GX. Batteries in a bank link through their RS485 ports and select a master automatically, with no DIP switches or addresses, and the GX shows the linked bank as one battery. Over Bluetooth, the Epoch Li-Ion app for iOS and Android shows state of charge, voltage, current, temperature and protection status.

Both Communication Cables Included

Both data cables come in the box. The battery-to-battery communication cable links RS485-OUT on one battery to RS485-IN on the next, so a bank shares data down the chain. The master battery-to-Victron CAN cable connects the CAN port of Battery 1 to the GX's BMS-Can or VE.Can 2 port; make only one CAN connection per bank. Fit the caps on all unused ports. If more length is needed, a standard Cat 7 Ethernet patch cable can be used between the battery's CAN port and the GX port.

Expandable, Protected, and Built for the Long Haul

Expand to 15 batteries in parallel: up to 1,875Ah and 96.00kWh at 51.2V.

The 110 lb (50 kg) battery measures 25.2 × 9.65 × 8.66 in (640 × 245 × 220 mm) in an ABS plastic case with threaded red (+) and black (-) terminals and end handles for lifting. Its IP54 enclosure is dust-protected and splash-resistant but not waterproof, so install it upright in a dry, protected location. Up to 15 matched 48125A-COMM batteries can be connected in parallel; series connection is not approved for this model.

2A active balancing engages when cell voltages differ by more than 0.015V, keeping the 16 cells matched without user intervention, and the built-in smart BMS protects against overcharge, over-discharge, over-current, short circuit and high or low temperature. The battery is rated for 7,000+ cycles and carries an 11-year limited warranty (3 years of free replacement, then 40% off MSRP on a replacement battery through Year 11) against qualifying defects in materials and workmanship. Register within 90 days or keep your proof of purchase.

Battery features

Heated 48V LiFePO4 power with Victron CAN, Bluetooth monitoring, active balancing and both communication cables included.

• Both communication cables included: A battery-to-battery cable for the RS485 link and a master battery-to-Victron CAN cable for the GX come in the box.
• 125Ah / 6.40kWh capacity: Stores 6,400Wh (nominal, 51.2V) of 48V deep-cycle energy in one battery.
• 150A continuous discharge: About 7,680W of DC power at 51.2V before inverter losses, for properly sized 48V inverter systems.
• 300A peak discharge: Covers start-up surges from inverters, motors and compressors for up to 10 seconds only.
• 150A continuous charge: Up to 150A from all sources combined, up to 62.5A (0.5C) recommended; program 56.8V–57.6V bulk/absorption and never program a charge voltage above 57.6V (58.0V is the maximum charge voltage).
• Internal heating: Charge current powers the heater at 0°C (32°F) and charging resumes at 5°C (41°F); the heater runs only while a charger supplying at least 0.5A is connected.
• Victron CAN communications: Reports to a Cerbo GX or Ekrano GX over CAN-bus with DVCC; the integrated shunt supplies state of charge, so a separate battery monitor is not required.
• Bluetooth app monitoring: State of charge, voltage, current, temperature and protection status in the Epoch Li-Ion app for iOS and Android.
• 2A active balancing: Engages when cell voltages differ by more than 0.015V to keep the 16 cells matched.
• IP54 enclosure: Dust-protected and splash-resistant. Not waterproof: do not submerge, pressure wash, or install where standing water can collect.
• Parallel expansion: Up to 15 matched batteries in parallel (1,875Ah / 96.00kWh). Series wiring is not approved for this model.
• 7,000+ cycles, 11-year limited warranty: No watering or acid service. 11-year limited warranty against defects in materials and workmanship: 3 years of free replacement, then 40% off MSRP on a replacement battery through Year 11. Register within 90 days or keep your proof of purchase.

IP54 splash-resistant protection

Dust-protected and splash-resistant, for dry, protected installations. Not waterproof.

Under IEC 60529, IP54 means dust-protected (5) and protected against splashing water from any direction (4). The enclosure is not waterproof: it is not designed for submersion, pressure washing, bilge flooding or continuous water exposure. Install the battery in a dry, protected location, do not mount it where standing water can collect around the case or terminals, and keep the caps fitted on unused data ports to keep out dust and water.

Why upgrade to Epoch LiFePO4?

Flat voltage. Long cycle life. No watering or acid service.

Compared with lead-acid batteries, LiFePO4 (lithium iron phosphate) chemistry gives a flat voltage curve, long cycle life and maintenance-free service. The 48125A-COMM needs no watering or acid service, and its built-in battery management system monitors the cells and disconnects them when operating limits are exceeded. Routine inspections of the case, terminals, cables and charger settings still apply.

Fitment and installation note

Verify your inverter, charger, wiring, and installation location before use.

Confirm that the compartment fits the 25.2 in L × 9.65 in W × 8.66 in H case, with clearance above the terminals for cable bend radius, terminal covers and inspection. The battery weighs about 110 lb (50 kg), so use two people or a lifting aid and lift by the end handles. Mount it upright and secure it with a tray, strap, bracket or battery box so it cannot slide or tip; never rely on the terminals or cables to restrain it. Tighten the terminal bolts securely without over-tightening the threaded inserts, place a DC-rated main fuse or breaker as close as practical to the battery positive terminal, and confirm polarity with a multimeter before the final connection. Do not hot-connect batteries, and pre-charge large inverters where required.

Applications and use cases

• Off-grid solar systems
• Off-grid cabins
• Off-grid home energy storage
• Solar battery banks and inverter systems
• RV house power (48V systems)
• Van house power (48V systems)
• Boat house power (dry protected installation)
• Golf carts (controller within 150A continuous)
• Utility vehicles (controller within 150A continuous)
• Backup power
• Large battery banks (up to 15 in parallel)
• Victron Cerbo GX and Ekrano GX systems

At a glance

• 125Ah capacity
• 6.40kWh stored energy
• 150A continuous output
• 300A 10 sec peak
• 110 lb battery weight
• IP54 splash resistant

Compatible charging equipment

• Program every charging source for 48V LiFePO4 operation, with equalization and temperature compensation disabled. Combined charge current from all sources must stay at or below 150A per battery.
• 48V LiFePO4 chargers, converters and inverter chargers that can be set to the recommended values, including the Epoch 48V 15A Lithium Battery Charger
• Solar charge controllers (MPPT or PWM) with a programmable or LiFePO4 profile
• DC-to-DC chargers for alternator charging
• Victron systems with a Cerbo GX or Ekrano GX, where CAN comms let the battery set charge limits through DVCC

What Can It Run?

Epoch plans runtime on 80% of the 6,400Wh nominal energy, about 5,120Wh per battery. Runtime in hours is roughly 5,120Wh divided by the load in watts.

These are DC estimates at 25°C on a new, fully charged battery; inverter losses, cabling, temperature, battery age and duty cycle change real results. For a parallel bank, multiply by the number of batteries.

Suitable For:

• Off-grid cabins, homes and solar energy storage with 48V inverter chargers and MPPT solar charge controllers.
• RV and van house power built around a 48V inverter charger, installed in a dry, protected location.
• Boat house power in dry, protected compartments, installed to applicable marine electrical standards and the boat manufacturer's requirements.
• Victron systems with a Cerbo GX or Ekrano GX, using CAN communication and DVCC.
• Golf carts and utility vehicles whose motor controller stays within 150A continuous, with peaks of no more than 300A for up to 10 seconds.
• Backup power for 48V systems.
• 48V DC loads, and 12V loads through a 48V-to-12V DC-DC converter.
• Large banks of up to 15 batteries in parallel (96.00kWh).

Certifications & Standards

• IP54: Dust-protected, and protected against splashing water from any direction. Under IEC 60529 the first digit rates solids and the second rates water.
• CE: The manufacturer's declaration that the product meets the European Union's health, safety and environmental requirements, which is required to sell it in the European Economic Area.
• RoHS: Complies with the EU Restriction of Hazardous Substances directive, which limits lead, mercury, cadmium and other toxic materials in electronics.
• UN 38.3: The United Nations test series every lithium battery must pass before it can be shipped by air, sea or road.

Please Note: Deep-cycle battery; not a cranking battery.

Please Note: Series connection is not approved; up to 15 matched batteries in parallel only.

Please Note: Size loads, conductors and fuses to the 150A continuous rating; the 300A rating applies for up to 10 seconds only. Size inverters by DC input current, not AC output.

Please Note: Set the inverter low-voltage shutdown above 41.6V so it stops before the BMS disconnects.

Please Note: Never program a charge voltage above 57.6V; combined charge current from all sources must stay at or below 150A per battery.

Please Note: The internal heater runs only while a charger supplying at least 0.5A is connected; it never uses stored energy.

Please Note: Neither the POWER button nor the app is a means of isolation; open a DC disconnect or remove the battery cables for storage or service.

Please Note: The BMS does not replace correctly sized fuses or breakers; place a DC-rated main fuse or breaker as close as practical to the positive terminal.

Please Note: IP54 is not waterproof: install upright in a dry, protected location; do not submerge, pressure wash or install where standing water can collect.

Please Note: Make only one CAN connection per bank; fit caps on all unused data ports.

Please Note: Use matched batteries of the same age, condition and state of charge; fully charge each before connecting it into a bank.

Please Note: Long-term storage: charge to about 30–50%, disconnect loads, and check at least every 3 months.

Please Note: Weighs about 110 lb (50 kg): use two people or a lifting aid and lift by the end handles.