This four-pack of Renogy Core Mini 12V 100Ah DuoHeat LiFePO4 batteries builds a 12V 400Ah (5,120Wh) bank that keeps accepting a charge in serious cold. Each Group 22NF-size battery carries dual 110W heating pads that warm the cells automatically, allowing charging in temperatures down to -22°F, per Renogy.
Who This Bank Is For
Built for people who use their systems year-round in real winters: four-season RVers and vandwellers, ice-fishing shacks, hunting cabins, and work trailers that must recharge from solar or a generator when it is well below freezing. The compact 22NF case size also fits tight battery compartments where a group 24 or 31 battery will not. If your batteries live somewhere that rarely drops below freezing, the non-heated Core Mini versions cost less and do the same job.
Key Features
- 12V 100Ah / 1,280Wh per battery; 400Ah / 5,120Wh with all four in parallel
- DuoHeat self-heating: dual 110W heating pads activate automatically below 41°F and shut off above 50°F, per Renogy
- Charge temperature range of -22°F to 131°F with heating active; discharge from -4°F to 140°F, per Renogy
- Compact Group 22NF case: 9.02 x 5.43 x 8.39 in and 21.38 lb per battery
- 100A BMS: 100A max continuous charge and discharge, 300A peak for 10 seconds, per Renogy
- Rated for 5,000 cycles at 80% depth of discharge, per Renogy
- IP65 dust-tight, splash-resistant enclosure; expandable up to 4S4P (20.48kWh max), 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, IC, RoHS, UKCA). Its batteries, charge controllers, inverters, and monitoring hardware are specified to work together, which keeps system design and support straightforward.
Specifications
| SKU |
RBT12100LFP-Hx4-US (four batteries) |
| Chemistry |
Lithium iron phosphate (LiFePO4) |
| Nominal voltage |
12V per battery |
| Rated capacity (per battery) |
100Ah / 1,280Wh (0.5C at 77°F), per Renogy |
| Bank totals |
Four in parallel: 12V 400Ah / 5,120Wh. Four in series: 48V 100Ah |
| Cycle life |
5,000 cycles (80% DOD), per Renogy |
| Self-heating |
DuoHeat dual 110W heating pads; activate below 41°F, deactivate above 50°F; require a stable charge current above 10A, per Renogy |
| Max continuous charge current |
100A per battery |
| Max continuous discharge current |
100A per battery (300A peak, 10 seconds) |
| Charge temperature range |
-22°F to 131°F (with self-heating) |
| Discharge temperature range |
-4°F to 140°F |
| Storage temperature range |
-4°F to 113°F |
| Expansion |
Series and parallel up to 4S4P (max 16 batteries, 20.48kWh), per Renogy |
| Battery size |
Group 22NF; 9.02 x 5.43 x 8.39 in per battery |
| Weight |
21.38 lb per battery; about 85.5 lb for the set |
| Terminals |
M8 x 1.25 x 12 mm bolts; recommended torque 53.1 to 70.8 in-lb |
| Enclosure rating |
IP65 |
| Bluetooth |
Not built in; compatible with Renogy external monitoring devices |
| Certifications |
MSDS, UN38.3, FCC, CE, PSE, IC, RoHS, UKCA, per Renogy |
| Warranty |
5-year prorated material and workmanship warranty, per Renogy |
| What's included |
4x Renogy Core Mini 12V 100Ah DuoHeat battery, terminal bolts (2 per battery), insulating sleeves (2 per battery), 4x user manual |
| Documentation |
Renogy user manual (PDF) |
Cold Weather, Explained
Standard lithium batteries must block charging below 32°F to avoid permanent cell damage. DuoHeat batteries solve this differently: when the internal temperature drops below 41°F and a charging source supplying more than 10A is connected, dual heating pads on both sides of the cell stack warm the battery, then shut off above 50°F, per Renogy. The heating draws from the charger, not from your stored energy, and the process is automatic — no switches or app required. The result is a battery that can accept a charge in air temperatures down to -22°F. Note that heating engages during charging; without a charge source connected, discharge is still limited to -4°F and above.
System Fit & Expansion
Four in parallel gives you a 12V 400Ah bank that can deliver 400A combined — ample for a 12V inverter such as the Renogy REGO 3000W 12V inverter charger with LCD display. On the charging side, size sources within 100A per battery and remember cold-weather charging needs at least 10A per battery to run the heaters; the Renogy 800W solar kit with REGO 60A MPPT charge controller is a matched solar input. Per Renogy the batteries also support series wiring (up to 48V) and expansion to 16 batteries in 4S4P; series banks require equipment rated for the higher voltage. See our full Renogy collection for chargers, cables, and panels.
Warranty & Support
Per Renogy, each battery carries a 5-year prorated material and workmanship warranty. OffGrid Horizon is a family-owned authorized Renogy dealer, so purchases here are eligible for Renogy US warranty service. Call us at (302) 496-3554 with sizing or installation questions — we answer the phone.
Shipping
This four-pack weighs about 86 lb plus packaging and may ship as multiple heavy parcels or LTL freight on a pallet within the US. 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 the self-heating drain my battery? No. Per Renogy, DuoHeat runs off the connected charging source (it needs a stable charge current above 10A), so it warms the cells with incoming power rather than stored energy.
Can I mix these with older or non-heated batteries? No. Build the bank only from identical DuoHeat 12V 100Ah batteries of similar age and state of charge. Mixing models, ages, or chemistries causes imbalance.
Can I charge from my vehicle's alternator? Yes, through a DC-DC charger with a LiFePO4 profile, sized within the 100A-per-battery limit and above the 10A minimum needed to run the heaters in cold weather.
What charger profile should I use? A lithium (LiFePO4) profile within the battery's 10V to 14.6V operating range, per Renogy. Flooded or AGM lead-acid profiles may not charge these batteries fully or correctly.
How should I store them over winter? Disconnect loads and chargers and store within -4°F to 113°F at a partial state of charge, topping up periodically per the Renogy manual.
Is it safe to install indoors or under a seat? 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.
Do these have Bluetooth? No built-in Bluetooth. Use a shunt-based battery monitor for accurate bank-level state-of-charge readings.
Wondering whether you need DuoHeat or standard low-temp protection? Call OffGrid Horizon at (302) 496-3554 and we will walk through your winter conditions honestly.
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