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Renogy

Renogy Core Mini - 12.8V 100Ah Lithium Iron Phosphate Battery (4 Pack)

SKU RBT12100LFP-Mx4-US

Regular price: $1,121.00

Regular price: $1,121.00

✅ Order by 12:00 PM EST and processing starts the same day (ships within 1–2 business days). Free, insured US shipping — delivery in 4–7 business days. Oversized items ship via LTL freight and we coordinate delivery with you by phone.

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Shipping: how fast & how it works

Free standard shipping on every US order — no shipping charges at checkout, no hidden fees, and every shipment is insured against loss or damage.

Processing: 1–2 business days. Order before 12:00 PM EST and processing begins the same day.
Delivery: 4–7 business days via USPS, UPS or FedEx. Tracking is emailed the moment your order ships.
Large items (solar kits, batteries, shelters): delivered by LTL freight carriers such as FedEx Freight, Old Dominion or XPO. The carrier calls ahead to schedule a delivery window — please inspect the pallet and note any damage on the delivery receipt before signing, and we’ll take care of the rest.

Questions about delivery to your location? Call (302) 496-3554 (Mon–Fri, 9am–4pm EST) — we’re happy to check before you order.

What is your Return Policy?

At OffGrid Horizon, we want every customer to shop with confidence. If something doesn’t go as planned, we’ve made returns and refunds simple and fair. Here’s how it works:

1. Return Window

You can request a return within 30 days of receiving your order. Unfortunately, we’re unable to accept returns after that time frame.

2. Who Pays for Return Shipping?

If your item arrives damaged, defective, or incorrect, we’ll cover the return shipping cost — and you’ll receive a full 100% refund or replacement, including any original shipping costs.
If you’re returning an item because you changed your mind, you’ll be responsible for return shipping, and a 25% restocking fee applies.

3. Damaged or Defective Items

Received something broken or not working properly? Contact us within 30 days. We’ll provide a prepaid return label and once the item is returned and inspected, we’ll issue either a full refund or a replacement.

4. Changed Your Mind?

If you no longer want the item, you can return it within 30 days — as long as it’s unused, unopened, in its original packaging, and in resellable condition.

5. Refund Processing

Once we receive and approve your return, we’ll send a confirmation email and issue a refund to your original payment method within 7 business days. Please allow additional time for banks or credit card companies to process and reflect the refund.

How to start a return: email sales@offgridhorizon.com or call (302) 496-3554 (Mon–Fri, 9am–4pm EST) with your order number — we’ll send return instructions and your RMA right away.

Product Description

This four-pack of Renogy Core Mini 12.8V 100Ah LiFePO4 batteries builds a 12V 400Ah (5,120Wh) bank out of Group 22NF-size batteries that weigh just 21.8 lb each. It suits builds where space and lifting weight matter as much as capacity: vans, teardrop trailers, boats, and modular systems you can grow one battery at a time.

Who This Bank Is For

Van and small-RV builders who want to distribute weight across several small batteries instead of wrestling one large one; anglers running trolling motors and electronics; and off-grid users who like the redundancy of four independent batteries — if one ever needs service, the other three keep working. Low-temperature charge protection blocks charging below 32°F to protect the cells, making these a fit for three-season use and heated compartments in winter.

Key Features

12.8V 100Ah / 1,280Wh per battery; 400Ah / 5,120Wh with all four in parallel
Compact Group 22NF size: 9.02 x 5.43 x 8.39 in and 21.8 lb per battery
Rated for 5,000 cycles at 80% depth of discharge (80% end-of-life capacity), per Renogy
Low-temperature charge protection: charging disabled below 32°F; discharge continues to -4°F
100A max continuous charge and discharge per battery, 300A peak for 5 seconds, per Renogy
IP65-rated enclosure; M8 terminals
Compatible with the Renogy 300A Battery Shunt (sold separately) for state-of-charge monitoring
Expandable in series and parallel up to 4S4P (up to 20.48kWh), 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, RCM, 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-Mx4-US (four batteries)
Chemistry	Lithium iron phosphate (LiFePO4)
Nominal voltage	12.8V 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, 80% EOL), per Renogy
Max continuous charge current	100A per battery
Max continuous discharge current	100A per battery (300A peak, 5 seconds)
Low-temperature protection	Charging blocked below 32°F, per Renogy
Charge temperature range	32°F to 122°F
Discharge temperature range	-4°F to 140°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	21.8 lb per battery; about 87.2 lb for the set
Terminals	M8 (terminal bolts included)
Enclosure rating	IP65
Monitoring	Compatible with Renogy 300A Battery Shunt (sold separately); no built-in Bluetooth
Certifications	MSDS, UN38.3, FCC, CE, PSE, RCM, IC, RoHS, UKCA, per Renogy
Warranty	5-year prorated material and workmanship warranty, per Renogy
What's included	4x Renogy Core Mini 12.8V 100Ah battery, terminal bolts (2 per battery), 4x user manual

Cold Weather, Explained

These batteries use low-temperature charge protection rather than heating: below 32°F the BMS disconnects the charge circuit so cold cells are not damaged, then allows charging again once the battery warms above freezing. Discharge keeps working down to -4°F, so lights and pumps stay on in the cold. If you need to recharge during sustained sub-freezing weather, Renogy's DuoHeat version of this same Group 22NF battery heats its own cells; this standard version does not.

System Fit & Expansion

All four in parallel deliver up to 400A combined, enough to feed the Renogy REGO 3000W 12V inverter charger with LCD display at full output. Keep charge sources within 100A per battery; the Renogy 800W solar kit with REGO 60A MPPT charge controller pairs well, and a DC-DC charger covers alternator charging. Per Renogy the batteries support series strings up to 48V and expansion to 16 units (4S4P, 20.48kWh); series banks require equipment rated for the higher voltage. Cables, panels, and monitors are in our Renogy collection.

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. Questions before or after the sale: (302) 496-3554.

Shipping

This four-pack weighs about 87 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

Can I mix these with my older batteries? No. Build the bank only from identical Core Mini 100Ah batteries of similar age and state of charge. Mixing capacities, ages, or chemistries causes imbalance.

Can I start with two and add the other two later? Renogy recommends paralleling identical batteries of similar age and charge state, so it is best to commission all four together. If you expand later, match state of charge before connecting and keep the 4S4P limit.

Can I charge from my vehicle's alternator? Yes, through a DC-DC charger with a LiFePO4 profile sized within 100A per battery. Do not wire directly to the alternator.

What charger profile should I use? A lithium (LiFePO4) profile per the Renogy manual. Chargers set for flooded or AGM lead-acid may not charge these batteries fully or correctly.

How should I store them over winter? Disconnect loads and chargers, store at a partial state of charge, and top up periodically per the Renogy manual. Avoid leaving them deeply discharged for long periods.

Is it safe to install them indoors or under a seat? LiFePO4 batteries do not off-gas during normal operation the way flooded lead-acid batteries do, so enclosed compartments are common installs. Follow the Renogy manual's mounting, clearance, and temperature guidance.

How do I monitor state of charge? Add the Renogy 300A Battery Shunt (sold separately) at the bank negative, or any quality shunt-based monitor; there is no built-in Bluetooth.

Want help deciding between one big battery and four small ones? Call OffGrid Horizon at (302) 496-3554 — family-owned, and we sell both, so you will get a straight answer.