













All-Weather LiFePO4 Power That Doesn't Quit
$929.95
Out of stock
The Renogy 12V 300Ah Core Series LiFePO4 battery with self-heating is built-to-survive cold-weather off-grid setups where standard lithium cells shut down. EV-grade cells deliver consistent power nearly ten times longer than lead-acid, while the integrated self-heating function keeps the battery charging in sub-freezing conditions. With 59% more capacity than a same-sized 200Ah LiFePO4, this field-tested unit gives you the reserve to handle storms, hurricanes, and extended grid outages without compromise.

Lead-acid batteries are the off-grid equivalent of a grid-tied system that goes dark during outages — they promise power but fail when conditions get real. The Renogy 12V 300Ah Core uses EV-grade LiFePO4 cells that last almost 10 times longer than lead-acid, eliminating the cycle of premature replacements that drain your affordable. At Off Grid Vault, we only carry batteries we would install on our own cabins. This 300Ah unit is pre-vetted for real-world off-grid performance — not shelf life in a climate-controlled warehouse. With 59% more capacity than a same-sized 200Ah LiFePO4 pack, you get genuine grid-independent power that holds up under actual demand, not just datasheet conditions.

Standard LiFePO4 batteries refuse to charge below 32°F — a critical failure point for anyone living off-grid through a Midwestern winter or Pacific Northwest cold snap. The Renogy Core solves this with 200W self-heating elements, the highest in the industry, warming cells 2X faster than competing heated batteries. When the temperature drops, the battery automatically activates heating using your charge source, so you wake up to a fully charged bank instead of a dead one. This is off-grid proven cold-weather resilience: no manual intervention, no external heating pads, no guesswork. Just ensure a stable charge current greater than 10A per battery to initiate the self-heating cycle.

The difference between 200Ah and 300Ah is not incremental — it is the difference between making it through a three-day blackout and falling short on night two. This battery delivers 59% more stored energy in the same footprint, giving you the reserve capacity to brace for unexpected storms, hurricanes, and wildfires without rationing power. Pair multiple units to scale your bank for whole-home backup, a remote cabin, or an RV build that does not compromise. The Renogy Core is field-tested for the scenarios our buyers actually face — not hypothetical best-case conditions. More capacity means fewer charge cycles per day, which extends cell life and keeps your system running longer between replacements.
Verify your system matches these requirements before ordering.
Designed for setups that can't afford cold-weather downtime.
| Length | See product page |
|---|---|
| Width | See product page |
| Height | See product page |
| Weight | See product page |
| Chemistry | Lithium Iron Phosphate (LiFePO4) |
|---|---|
| Nominal Voltage | 12V |
| Capacity | 300Ah |
| Cell Grade | EV-grade |
| Self-Heating | Yes |
| Casing | See product page |
|---|
| Warranty | See product page |
|---|---|
| Certifications | See product page |
Every product we carry is vetted for real-world performance. This battery is no exception.
“I swapped out six AGM batteries for two of these 300Ah Core units in my cabin bank. The self-heating is the real deal — last January hit -8°F and the batteries charged without me doing anything. My old lead-acid bank would have been bricks in those conditions. Way more capacity than I need on a normal day, but that is exactly the point when a storm rolls through and the sun disappears for three days straight.”














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