12V Lithium Batteries: 10Ah to 300Ah LiFePO4 Range

Whether you are replacing a pair of tired lead-acid batteries in a caravan, building a small solar setup, or spec’ing units for a dealer order, 12V is usually where the conversation starts. Our 12V range runs from 10Ah right up to 300Ah — including slim models for tight compartments and a trolling-motor model with a 100A BMS.

12V Lithium Battery Models (10Ah – 300Ah)

Which 12V capacity do you need?

Start from the load list, not from the old battery. Add the watts of everything that runs at once, multiply by the hours you need, then add 30% for inverter losses and ageing. The table below converts that number into a case size and a realistic weight.

Capacity	Energy	Weight	Typical use
50Ah	0.64 kWh	≈5 kg	Small trailers, kayak motors, backup lighting
100Ah	1.28 kWh	≈10 kg	RV house bank, marine, trolling motor
150Ah	1.92 kWh	≈15 kg	Larger vans, weekend off-grid
200Ah	2.56 kWh	≈22 kg	Full-time vans, small cabins
300Ah	3.84 kWh	≈30 kg	Long-range off-grid, big inverters

For a worked example with real numbers, see what a 12V 100Ah battery actually runs. Fishing setups can jump straight to the 12V 100Ah trolling motor battery.

12V LiFePO4 vs AGM: what actually changes

The case size is often the same, so the difference is not physical — it is usable energy, weight and how the battery behaves at the end of its life. The AGM column below is an industry-typical reference for a 12V 100Ah block, not a specific product.

Factor	12V 100Ah LiFePO4 (LINEX)	Typical 12V 100Ah AGM
Usable energy	1.28 kWh (100% of rated, BMS-limited)	≈0.6 kWh at 50% depth of discharge
Weight	≈10 kg	≈30–33 kg
Cycle life	6,000 cycles at 80% DoD, 25°C	≈300–500 cycles at 50% DoD
Charging	14.6V fast, 13.5–13.8V float, no absorption taper	14.4–14.7V absorption, 13.2–13.6V float
Maintenance	None; terminal check once a year	Water top-up, terminal cleaning, sulfation risk
Low-temperature charging	BMS blocks charge below 0°C	Charges below 0°C, with capacity loss

One practical consequence: a 100Ah LiFePO4 replaces a 200Ah AGM bank in usable terms while weighing about a third as much — which is why caravan and marine builds move first. The other is the charger: a lead-acid charger with a desulfation or equalise mode must not be used on LiFePO4. Check that the profile can be set to 14.6V maximum and 13.5–13.8V float.

Charging a 12V LiFePO4: voltages and current

These are the numbers published on our 12V 100Ah datasheet. Other capacities in the range follow the same profile; the current limits scale with capacity.

Parameter	Value
Nominal voltage	12.8V
Fast / absorption voltage	14.6V
Standby / float voltage	13.5–13.8V
Operating range	8.8–14.6V
Low-voltage protection	8.8–10V
Charge current (standard / recommended / max)	20A / 50A / 100A
Charging temperature	0–50°C
Discharge temperature	−20–60°C
Cycle life	6,000 at 80% DoD, 25°C

Alternator charging needs a DC-DC charger rather than a direct cable: the alternator’s fixed 14.2–14.4V will not top the battery properly and can overload the alternator at idle. Our 12V 100Ah power hub with 40A DC-DC is built for that case. Full voltage curves for 12V, 24V and 48V are on the battery voltage charts page.

Series or parallel: 12V, 24V or 48V

Parallel adds capacity at the same voltage. Series adds voltage at the same capacity — but with four independent 12V BMS units in series, one BMS can disconnect before the others and take the whole string offline. That is why we recommend native 24V or 48V units for new builds, and reserve series connection for retrofits where the 12V models are rated for it.

Configuration	Result	When it makes sense	Watch out for
2 × 12V 100Ah parallel	12V 200Ah, 2.56 kWh	Same voltage, more runtime	Equal cable lengths; fuse each battery
2 × 12V 100Ah series	24V 100Ah, 2.56 kWh	Retrofit where a 24V charger already exists	Series-rated models only; add a balancer
4 × 12V 100Ah series	48V 100Ah, 5.12 kWh	Rare; 48V native is usually cheaper	BMS imbalance; insulation and breaker ratings
Native 24V or 48V unit	One BMS, one warranty	New builds, telecom, ESS	Charger and inverter must match system voltage

Cable and fuse sizing follows the continuous current, not the capacity label. A 100A continuous 12V unit needs roughly 25mm² cable for runs under 1.5m with a 125A fuse; a 200A parallel bank moves to 50mm² and a 250A fuse. Treat these as starting points and check against local wiring rules.

Same capacity, other voltages

If the build is new, match the voltage first and the capacity second. These are the direct equivalents in our range:

Capacity	12V	24V	48V
100Ah	12V 100Ah	24V 100Ah	48V 100Ah
200Ah	12V 200Ah	24V 200Ah	48V 200Ah
300Ah	12V 300Ah	On request	On request

Frequently asked questions

Battery tool: convert Ah to kWh for any battery in seconds — Ah to kWh Calculator.

Prefer to see everything side by side? Browse the full 12V/24V deep-cycle range or send your load list and we will size the bank for you.