The short version: the Eco-Worthy 12V 280Ah Metal Case LiFePO4 Battery gives you the most amp-hours per dollar of any name-brand lithium battery we've priced, in a metal enclosure that doesn't need a battery box. We stock it with free U.S. shipping & free 30-day returns — and it's covered by our Lowest Price Guarantee: found it cheaper? We'll beat it. Take 5% off your first order with code RVSAFE5.
A high-capacity 12V lithium battery is the single biggest upgrade you can make to an off-grid RV or travel trailer power system. One 280Ah LiFePO4 battery stores as much usable energy as roughly four to five 100Ah lead-acid batteries (lead-acid shouldn't be discharged below ~50%), at a fraction of the weight. But the 280Ah-class market has real differences in case design, BMS rating, and support — and the right pick depends on your rig. Here's how the main options actually compare.
What matters in a high-capacity LiFePO4 battery
- Usable energy (Wh), not just Ah. Amp-hours × voltage = watt-hours. A 12.8V × 280Ah battery stores 3,584Wh — enough to run a 100W fridge for a day and a half, or a 1,000W appliance for about 3 hours through an inverter.
- BMS continuous current. A 200A BMS supports roughly 2,500W of continuous inverter draw at 12V. If you plan to run a large inverter (3,000W+), you need a higher-rated BMS or batteries in parallel.
- Case design. Most lithium batteries use ABS plastic cases. A metal enclosure adds heat resistance, crush protection, and vibration resistance — and can be mounted directly without a separate battery box.
- Low-temperature protection. Charging LiFePO4 cells below freezing damages them permanently. A BMS with low-temp cutoff protects the investment; self-heating models go further for four-season campers.
- Monitoring. Bluetooth app monitoring lets you check state of charge, voltage, and current from your phone instead of guessing from a voltmeter.
Eco-Worthy 12V 280Ah Metal Case — the value pick
The Eco-Worthy 280Ah checks every box above: 3,584Wh of storage, a 200A smart BMS, Bluetooth monitoring, low-temperature charge protection, and LiFePO4 cells rated for thousands of cycles — in a heavy-duty metal case that's rated to go straight into an RV battery compartment with no battery box, with 4 mounting feet included. It also has a feature none of the others in this comparison offer: a one-touch safety switch that fully disconnects battery output for installation, maintenance, or storage — no pulling terminal lugs. At 68.5 lb it's heavy, but that's the trade for 280Ah of prismatic cells in a steel shell. We sell it with free shipping and free 30-day returns.
LiTime — the form-factor specialist
LiTime is probably Eco-Worthy's closest rival in value lithium, and they earn their reputation. Their current U.S. lineup brackets the 280Ah class with a 230Ah Group 4D pack and a 320Ah "Mini" — both with 200A BMS, Bluetooth, low-temp protection, and an IP65 waterproof housing, with very high claimed cycle life. When LiTime is the right buy: if your battery lives somewhere wet (open boat, exposed tongue box), the IP65-rated plastic housing is a genuine advantage over any vented metal case, and their compact Group 31 / Mini form factors fit tight compartments that a full-size 280Ah brick won't. Expect to pay meaningfully more per amp-hour, especially for the 320Ah Mini.
Two LiTime batteries we now carry fit this comparison. The 12V 230Ah Bluetooth stores 2,944Wh with a 200A continuous BMS in a 19.02 × 6.69 × 9.45 in case, and the 12V 320Ah Mini holds 4,096Wh in 14.49 × 7.44 × 10.04 in at 57.17 lb, also on a 200A BMS. Both are IP65 with low-temperature cut-off, carry a 5-year LiTime warranty and ships free from our warehouse in Upland, California to the lower 48 states.
Comparing just these two brands, including their 12V 100Ah Group 24 and 24V 100Ah models? See LiTime vs Eco-Worthy lithium batteries, spec by spec.
Renogy — the ecosystem play
Renogy now does field a high-capacity pack: the Core Mini 12.8V 300Ah stores 3,840Wh (more than the 280Ah class), and the Pro 12V 100Ah/200Ah Smart LiFePO4 adds Bluetooth, low-temperature protection and self-heating options. What Renogy really sells, though, is the most complete one-brand ecosystem in RV solar: panels, Rover MPPT controllers, DC-DC chargers, inverters and monitoring designed to work together. When Renogy is the right buy: you’re building a whole system from scratch and want one brand, one app and one support line for everything — or you want self-heating for four-season use. On pure capacity per dollar the Eco-Worthy 280Ah is still the value pick: the Renogy 300Ah costs roughly twice as much for 7% more storage. Browse the full Renogy range if the one-brand system matters more than the lowest price per amp-hour.
Battle Born — the premium American option
Battle Born is the premium name in RV lithium, and the premium is real: U.S.-based assembly and support, a long warranty, and strong specs — their 270Ah GC3 packs support 300A continuous discharge, more than any battery in this comparison, which matters if you're running a large inverter hard. When Battle Born is the right buy: you want top-tier support and warranty backing from a U.S. company and the price difference isn't the deciding factor. For most weekend and seasonal RVers, though, the price gap buys a lot of solar panels.
Honest bottom line
Buy the Eco-Worthy 280Ah metal case if you want the most storage per dollar in a tough, box-free enclosure with a proper output disconnect switch — for most RV and travel-trailer owners, that's the answer. Choose LiTime for wet or space-constrained installs, Renogy if you're committing to a single-brand system, and Battle Born if maximum continuous output and white-glove U.S. support justify the premium. Prices move constantly in this category — check the live price on our product page.
FAQ
Is 280Ah enough to run my RV off-grid?
3,584Wh comfortably runs lights, fans, a 12V fridge, water pump, and device charging for 2–3 days without recharging. Add solar and it can run indefinitely for those loads. Air conditioning is the exception — a rooftop AC will drain any single 12V battery in a couple of hours.
Do I need a battery box for a metal-case battery?
No — the metal enclosure is designed for direct installation in a battery compartment or under a seat, which is one of the main advantages over plastic-cased packs. The Eco-Worthy 280Ah includes 4 mounting feet for exactly this.
Can my existing converter/charger charge a lithium battery?
Only if it has a LiFePO4 charge profile (14.4–14.6V). Many older RV converters are lead-acid only and will chronically undercharge lithium. A lithium-compatible converter or DC-DC charger is a worthwhile companion upgrade.
What does the 200A BMS limit mean in practice?
About 2,500W of continuous draw at 12V nominal. That supports a 2,000W inverter with headroom. For a 3,000W inverter, run two batteries in parallel.
Questions about fitting a lithium battery to your rig? Contact us — we ship from Upland, CA and answer real questions from real RVers.
Shop the full LiTime range at RV Parts Giant.