Renogy CORE 12-Volt 300Ah Deep Cycle Lithium Iron Phosphate Battery w/ Self-Heating Function

The Renogy CORE Series 12V 300Ah self-heating LiFePO4 battery packs 3,840Wh of storage into a single deep-cycle battery that warms its own cells for below-freezing charging. With a 200A BMS handling both charge and discharge, it anchors RV, van, marine, and off-grid cabin systems that need real capacity and true four-season operation.

Who This Battery Is For

This battery fits users who want large capacity from a single unit instead of paralleling smaller batteries: full-time RVers, camper van builders, boat owners, and cabin systems running inverters, refrigeration, and heat circulation through winter. The self-heating function makes it the right choice when you must recharge from solar, alternator, or generator while the battery compartment is below freezing. If your system never charges in sub-freezing conditions, a non-heated 300Ah model saves money.

Key Features

• 12V 300Ah / 3,840Wh in one battery; rated for 5,000 cycles at 80% depth of discharge, per Renogy
• Self-heating activates automatically below 32°F and turns off above 59°F when a charger supplying more than 10A is connected, per Renogy
• 200A max continuous charge and 200A max continuous discharge, with 390A peak for 5 seconds, per Renogy
• Charge from -4°F to 131°F (with self-heating); discharge from -4°F to 140°F, per Renogy
• BMS protection against cell over/under-voltage, over-current, high/low temperature, and short circuit
• IP65-rated enclosure; M8 terminals
• Expandable: up to 4 in series, up to 8 in parallel, or 4S4P for 48V 1,200Ah / 61.44kWh, per Renogy

Why Renogy

Renogy is an established maker of off-grid solar and battery equipment, and publishes test and safety documentation for this battery (MSDS, UN38.3, FCC, CE, PSE, UKCA). Its batteries, charge controllers, inverters, and monitoring hardware are specified to work together, which keeps system design and support straightforward.

Specifications

Cold Weather, Explained

Charging lithium cells below freezing damages them, so every LiFePO4 battery must either block cold charging or heat itself. This CORE battery does the latter: when cell temperature falls below 32°F and a charging source supplying more than 10A is connected, internal heating elements warm the cells automatically, then shut off above 59°F, per Renogy. Heating power comes from the charger, not from stored energy. The BMS still provides low-temperature cutoffs as a backstop — charging is blocked below 32°F until the heater does its work, and discharge cuts off at -4°F.

System Fit & Expansion

A single battery's 200A continuous discharge supports roughly 2,500W of continuous 12V inverter load, so pair one battery with an inverter of that class or keep larger inverters below the battery's limit; with two or more in parallel, the Renogy REGO 3000W 12V split-phase inverter charger runs at full output with headroom. For charging, the Renogy 800W solar kit with REGO 60A MPPT charge controller fits comfortably within the 150A recommended charge current, and its 60A output covers the 10A-plus needed to run the self-heater in winter. Per Renogy, expansion runs to 4 in series, 8 in parallel, or 4S4P for a 48V 1,200Ah bank; series banks require equipment rated for the higher voltage. Find matching gear in our Renogy collection.

Warranty & Support

Per Renogy, this battery carries a 5-year prorated material and workmanship warranty (see the warranty PDF above). OffGrid Horizon is a family-owned authorized Renogy dealer, so your purchase is eligible for Renogy US warranty service. Call us at (302) 496-3554 before or after the sale.

Shipping

At 60.63 lb, this battery ships as a heavy package or on a pallet via LTL freight within the US, depending on order size. Inspect the shipment before signing the delivery receipt; note any damage with the driver and call us at (302) 496-3554.

Frequently Asked Questions

Does self-heating work while the battery just sits there? No. Per Renogy it requires a connected charging source delivering more than 10A. Without a charger, the BMS simply blocks charging below 32°F and discharge below -4°F.

Can I mix it with my older batteries? No. Connect only identical CORE 12V 300Ah self-heating batteries of similar age and state of charge. Mixing models, capacities, or chemistries causes imbalance.

Can I charge from my vehicle's alternator? Yes, through a DC-DC charger with a LiFePO4 profile. Keep total charge current within 200A (150A recommended for a single battery, per Renogy) and above 10A for winter heating.

What charger profile should I use? A lithium (LiFePO4) profile with a 14.4V charge voltage, per Renogy. Flooded or AGM lead-acid profiles may not charge this battery fully or correctly.

How should I store it over winter? Disconnect loads and chargers and store within -13°F to 149°F at a partial state of charge, topping up periodically per the Renogy manual.

Is it safe to install indoors? LiFePO4 batteries do not off-gas during normal operation the way flooded lead-acid batteries do, so they are commonly installed in enclosed compartments. Follow the mounting, clearance, and temperature guidance in the Renogy manual.

How do I monitor state of charge? This model has no built-in Bluetooth. Renogy pairs it with the Battery Shunt 300 (sold separately), readable in the Renogy app or through Renogy ONE Core.

Sizing a four-season system around 300Ah? Call OffGrid Horizon at (302) 496-3554 — family-owned, authorized Renogy dealer, real answers.