150Ah Lithium · Runtime

How long will a 150Ah lithium leisure battery actually last?

150Ah is the sweet spot for a lot of motorhomes and families - enough to run heating, a fridge and charging comfortably across several days. Here is exactly what a TITAN 150Ah delivers, with real runtimes for the kit most people carry.

View the TITAN 12V 150Ah→ Size it for my setup→
150Ah
Rated capacity
1920Wh
Usable energy
1.92kWh
Per full charge
300Ah
Lead-acid for the same

What a 150Ah TITAN runs, and for how long

Figures assume a usable 1920Wh from a full charge. Items marked AC run through an inverter, so we have allowed for around 10% conversion loss. Real life varies with temperature, cable runs and how hard the kit works.

ApplianceTypical drawRuntime
12V compressor fridge 40 W ~2.0 days
LED lighting 12 W ~6.7 days
Diesel night heater 18 W ~4.4 days
Water pump 60 W ~32 hours
Phone and tablet charging 12 W ~6.7 days
Laptop 60 W ~32 hours
TV or projector 45 W ~43 hours
Wi-Fi or 4G router 10 W ~8.0 days
Electric blanket 45 W ~43 hours
CPAP machine 40 W ~2.0 days
MicrowaveAC 800 W ~2 hours
Coffee machineAC 1000 W ~104 min
1800W induction hobAC 1800 W ~58 min
2000W kettleAC 2000 W ~52 min

Runtimes are a single appliance running on its own from 100% to empty. In the real world you run several at once, so use the battery size calculator to total your daily draw and size the bank properly.

How many days off-grid?

A 150Ah TITAN holds a usable 150Ah. Match that to a typical day's use and you get a realistic time between charges, before any solar or alternator top-up.

Light weekender
3.8 days
~40Ah per day. Fridge, lights, phone charging and the odd pump cycle.
Typical touring
2.0 days
~75Ah per day. Fridge, lights, diesel heater, water, TV and device charging.
Heavy or full-time
1.3 days
~120Ah per day. All of the above plus regular inverter use for cooking and appliances.

The same days, with a 100W solar panel

A single 100W panel puts back around 25Ah a day on average between April and October, the months most people are actually out. That daily top-up slows the battery down like this, before any driving or hook-up.

Light weekender
10.0 days
~40Ah used, ~25Ah back from solar, so about 15Ah net a day.
Typical touring
3.0 days
~75Ah used, ~25Ah back from solar, so about 50Ah net a day.
Heavy or full-time
1.6 days
~120Ah used, ~25Ah back from solar, so about 95Ah net a day.

Those solar figures use one average 100W panel. For your exact panels, roof and time of year, run the numbers in the solar calculator.

Lithium vs lead-acid at 150Ah

This is where the rated number misleads people. A lead-acid leisure battery should only be taken to around half its capacity before it starts to wear out fast, so a 150Ah lead-acid gives you roughly 75Ah of safe, usable energy. A TITAN lithium of the same 150Ah rating gives you the full 150Ah, because LiFePO4 happily delivers its entire rated capacity.

Put simply, you would need around a 300Ah lead-acid bank to match the usable energy of this one TITAN battery, at roughly double the weight and a fraction of the cycle life. That is the real reason lithium wins on anything where weight, space or how often you charge actually matters.

150Ah handles a typical motorhome day without much thought - heating, fridge, water, lights and device charging across a long weekend before you need to recharge. Pair it with solar and most tourers stop watching the battery monitor altogether.

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Common questions

How long will a 150Ah lithium battery last?
A 150Ah TITAN gives a usable 1920Wh, roughly 150Ah, from a full charge. That runs a 40W compressor fridge for about 48 hours, or covers a light weekender for around 3.8 days between charges. Heavy users with inverter cooking get closer to a day.
How many amp hours can I actually use?
All of it. A TITAN gives you the full 150Ah to use, 100% usable capacity, which is about 1920Wh. A lead-acid of the same rating only safely gives you around half before it starts to wear out.
Will a 150Ah battery run a kettle or induction hob?
Through an inverter, yes, but only in short bursts. A 2000W kettle pulls around 165A from a 12V battery, so this pack would boil for roughly 52 minutes total on a full charge. For regular cooking you want a bigger bank, a high-output inverter and ideally more than one battery.
How long does it take to recharge?
It depends on the charger. From a 30A mains charger or DC-DC unit, a flat 150Ah pack refills in around 5.0 hours. A 50A charger does it in about 3.0 hours. TITAN packs take a high charge current happily, so the limit is usually your charger, not the battery. Check the charger compatibility list.
Can I charge it from the alternator while I drive?
Yes. The way we recommend is a DC-DC charger, also called a battery-to-battery charger, ideally a Victron Orion, which gives the lithium a clean, controlled charge and protects the starter battery. A standard split-charge relay does work, but it is not the most reliable way to charge lithium and some relays cause a backfeed that quietly skims around the top 15% off your usable capacity. Feeding straight off the alternator with no relay and no DC-DC is not something we recommend.
Is this enough for my van or boat?
For most weekend and touring setups, yes. Full-timers and anyone running inverter appliances regularly should size up or add a second battery. The quickest way to be sure is the battery size calculator, which totals your daily draw and recommends a capacity.

Compare the range

Every TITAN leisure battery is LiFePO4 with a custom TITAN BMS, IP67 casing and a lifetime, fully transferrable warranty. Pick the capacity that matches your use.