The short version: Weekends with hookups or a generator: one 100Ah. Two or three nights off-grid with a 12V fridge: the 200Ah. A week off-grid, or an inverter for a microwave or coffee maker: the 320Ah Mini. The 230Ah sits between the last two if your tray is narrow.
Start with the daily number
A lithium battery’s amp-hours times 12.8 volts gives its energy: LiTime rates its 100Ah at 1,280Wh, its 200Ah at 2,560Wh and its 320Ah Mini at 4,096Wh. What matters is how much you use per day. A 12V compressor fridge alone runs on the battery all day, roughly 40 to 60Ah in summer. Lights, the water pump, fans, the furnace blower and phone charging add to that. Add up your own loads, or let the calculator do it: it now prints a LiTime option sized to the same bank.
The four sizes
- 12V 100Ah Group 24 Bluetooth — 1,280Wh in a Group 24 case, 21.87 lb. Right for weekends where you plug in or run a generator, and for small trailers without a fridge on 12V.
- 12V 200Ah Bluetooth — 2,560Wh, 41.75 lb, 20.95 × 8.15 × 8.5 in. LiTime states 1,280W maximum continuous output, so pair it with an inverter of about 1,000W. The sensible default for a trailer that dry-camps a few nights at a time.
- 12V 230Ah Bluetooth — 2,944Wh with a 200A BMS (200A continuous charge and discharge, 1,000A for one second) in a 19.02 × 6.69 × 9.45 in case. More capacity and twice the continuous current of the 200Ah, in a narrower case.
- 12V 320Ah Mini Bluetooth — 4,096Wh, 57.17 lb, 14.49 × 7.44 × 10.04 in, 200A BMS with 2,560W continuous. The one to choose for a week off-grid or for a 2,000W inverter.
Prices are from our live catalog on October 10, 2026 and can change; the product page always shows the current price.
Why one bigger battery beats several small ones
LiTime allows up to four of the same battery in parallel, so two 100Ah batteries are a valid 200Ah bank. But one 200Ah case means one set of cables, one fuse and one BMS to monitor in the app, and the 200Ah costs less than two 100Ah Group 24 batteries. Parallel banks make sense when the tray only takes Group 24 cases.
Charging matters as much as capacity
A bigger battery needs a bigger charger to refill it. LiTime recommends a 14.6V 20A charger for the 100Ah Group 24, a 40A charger for the 200Ah and a 60A charger or 60A MPPT for the 230Ah. On the road, the LiTime 40A DC-DC charger charges from the tow vehicle at 20A or 40A. For solar, the LiTime 200Ah RV Solar Starter Kit pairs the 200Ah with 400W of Renogy panels and a Victron SmartSolar MPPT 100/30, and the LiTime 320Ah Off-Grid RV Power System goes to 800W of solar, a LiTime 100A MPPT, the DC-DC charger and a Victron 1600VA inverter.
Cold weather
All four stop charging below freezing to protect the cells (the 200Ah and 230Ah stop at 32°F and resume at 41°F). If the trailer is used in winter, the self-heating LiHeat 320Ah Mini warms itself so it can be charged. See our guide to self-heating lithium for winter camping.
FAQ
Will a 100Ah battery run my RV air conditioner?
No. A rooftop air conditioner needs a much larger bank and inverter. Run the calculator with air conditioning selected to see the size.
Can I add a second battery later?
Yes, if it is the same model. LiTime allows up to four in parallel.
LiTime batteries we list ship free from our warehouse in Upland, California to the lower 48 states (not Hawaii, Alaska or Puerto Rico), with LiTime’s 5-year battery warranty handled by LiTime. Not sure what size you need? The RV solar and battery calculator sizes the bank from what you run and now shows a LiTime option, or talk to a parts person before you order. See the whole LiTime range.