ECO WORTHY has replaced its 12V 280Ah metal-case LiFePO4 battery with the ECO WORTHY 12V 314Ah. We stock both while the 280Ah lasts. They look almost the same and use the same BMS, Bluetooth app, safety switch and charge settings, so the choice comes down to three things: capacity, price and whether the bigger case fits where your battery goes.
The short answer
- The 314Ah stores about 12% more energy (about 4,019Wh vs 3,584Wh) for $21 more. Per watt-hour it is the cheaper battery.
- It is a little bigger. About 0.6" longer, 0.6" taller and 1.9 lb heavier. Measure your compartment before you order.
- Everything else carries over: 200A BMS, Bluetooth monitoring, the one-touch safety switch, low-temperature charge protection, mounting feet and the same 14.6V charge settings.
- Don't mix them in one bank. If you already have a 280Ah and want to add a second battery, match it with another 280Ah while we have them.
Side-by-side specs
| Spec | ECO WORTHY 12V 280Ah | ECO WORTHY 12V 314Ah |
|---|---|---|
| Chemistry | LiFePO4, 12.8V nominal | LiFePO4, 12.8V nominal |
| Capacity | 280Ah / 3,584Wh | 314Ah / about 4,019Wh |
| BMS | 200A smart BMS | 200A smart BMS |
| Current rating | 200A maximum continuous | 157A standard, 200A maximum continuous, 220A for 10 seconds |
| Charge voltage | 14.6V | 14.6V |
| Low-temperature protection | Yes (charging stops below 19.4°F per our listing) | Yes (charge range 32°F to 131°F) |
| Self-heating | No | No |
| Bluetooth app | Yes | Yes |
| Safety switch | Yes, one-touch output disconnect | Yes, one-touch output disconnect |
| Case | Metal, with mounting feet | Metal, with mounting feet |
| Dimensions | 16.54" × 8.64" × 9.65" | 17.17" × 8.63" × 10.21" |
| Weight | 68.5 lb | 70.4 lb |
| Series/parallel | Up to 4P, 4S or 4P2S | Up to 4P, 4S or 4P2S |
| Our price | $448.99 | $469.99 |
Prices as of November 12, 2026. Check the product pages for current pricing.
What the extra 34Ah gets you
34Ah at 12.8V is about 435Wh. In RV terms that is roughly:
- about 10 more hours of a furnace blower drawing 3.5A,
- a night or two more of a 12V compressor fridge, depending on the weather and the fridge,
- or one more evening of lights, water pump, fans and phone charging for a couple.
That won't change how you camp, but it adds a little cushion on cloudy days when you're boondocking. If you're sizing a bank from scratch, our ECO WORTHY battery guide walks through daily use and runtime. The math there works for both batteries.
Price per watt-hour
| 280Ah | 314Ah | |
|---|---|---|
| Price | $448.99 | $469.99 |
| Per amp-hour | about $1.60 | about $1.50 |
| Per watt-hour | about $0.125 | about $0.117 |
| Pounds per kWh | about 19.1 lb | about 17.5 lb |
The 314Ah costs less per watt-hour and carries more energy per pound. For a new install it's the better value.
Will the 314Ah fit where my 280Ah goes?
Probably, but check. The 314Ah is 17.17" long and 10.21" tall, against 16.54" and 9.65" for the 280Ah. The width is the same. Measure three things before you order:
- Length of the space, including room for cables coming off the terminals.
- Height to the underside of the lid or seat. Leave room above the terminals for lugs, fuse holders and a wrench.
- Where the mounting feet land. If you drilled holes for the 280Ah's feet, the 314Ah's longer case may need new holes.
Neither battery needs a battery box. If yours lives under a dinette or bed, there's usually enough room. Tight tongue boxes and slide-out battery trays are where the extra half-inch matters.
Charging and wiring: no changes
Both batteries use the same settings: 14.6V absorption, float off (or 13.8V if your charger can't turn float off), equalization off. Our ECO WORTHY charge settings guide has converter, solar, DC-DC and inverter-charger settings. Change one thing when you switch: set your battery monitor's capacity to 314Ah, or its state-of-charge reading will drift.
The 314Ah's 157A standard rating also gives you a charging target. ECO WORTHY's 0.2C–0.5C range works out to about 63–157A for one 314Ah, compared with about 56–140A for one 280Ah.
Both support up to 4 in parallel, 4 in series, or 4P2S. Two 314Ahs in parallel make 628Ah (about 8,038Wh), compared with 560Ah (7,168Wh) for two 280Ahs. Our parallel and series wiring guide covers cable sizing, fusing and balancing for either battery.
Can I mix a 280Ah and a 314Ah in one bank?
Don't. In parallel, the two batteries would share current unevenly and reach full and empty at different times. In series it's worse: the smaller battery hits its limits first and the BMS cuts the whole string. Batteries in a bank should be the same model and capacity, ideally bought together and charged to full before you connect them.
If you have a 280Ah now and want to add capacity, buy a second ECO WORTHY 280Ah while we still have stock. If you're replacing the whole bank, go with 314Ahs.
Cold weather: same rules
Neither battery heats itself. Both stop charging when the cells get too cold, and both should be charged only at 32°F or warmer. The 314Ah's listing states that 32°F floor directly. If your battery lives in an outside compartment and you camp below freezing, read our cold-weather charging guide. Everything in it applies to both.
Which should you buy?
- Buy the 314Ah for a new install or a full bank replacement. It costs less per watt-hour, and it's the model ECO WORTHY will keep making.
- Buy the 280Ah to match one you already own, or if the 314Ah's extra length or height won't fit your compartment.
Comparing other brands at this size? See our high-capacity RV lithium battery comparison and SOK's 280Ah and 314Ah options, or browse all LiFePO4 batteries and the full ECO WORTHY range.
FAQ
Is the 314Ah a new version of the 280Ah?
Yes. ECO WORTHY lists the 314Ah as the replacement for its 280Ah metal-case battery. It's the same design with larger-capacity cells.
Do I need a new charger for the 314Ah?
No. Any 14.6V LiFePO4 profile that works for the 280Ah works for the 314Ah. Update the capacity setting on your battery monitor.
Does the 314Ah use the same Bluetooth app?
It has built-in Bluetooth monitoring like the 280Ah, showing voltage, capacity and charge or discharge status on your phone.
Can the 314Ah run a bigger inverter?
Not much bigger. Both have a 200A BMS. At 12V that's roughly a 2,000W continuous inverter load per battery. The 314Ah lists 157A as its standard (everyday) current, so size around 1,500–2,000W for one battery, or wire two in parallel for more.
Will you keep selling the 280Ah?
Until our stock runs out. After that, the 314Ah is the ECO WORTHY metal-case battery we'll carry.