The lithium battery for your Sprite caravan.
Sprite is the UK's best-selling caravan range - entry-level in price, not quality. Every model leaves the dealer with a lead-acid battery that gives you roughly half its rated capacity and fades over time. A TITAN gives you close to 100% usable power in the same front locker, handles months of winter storage without degrading, and holds voltage flat when the motor mover needs its peak surge.
Sprite: Swift Group's entry range, Cottingham, East Yorkshire
Sprite sits at the top of the UK caravan sales charts year after year. It is built by Swift Group in Cottingham, East Yorkshire - the UK's largest caravan manufacturer - and is positioned as the accessible, weight-conscious entry to the Swift Group family. The current 2026 range has been streamlined to four single-axle, four-berth models: the Alpine 4, the Alpine 4 DB, the Major 4 SB, and the Major 4 EB. Previous Sprite generations also included the compact two-berth Sprite Compact and the eight-foot-wide Sprite Quattro twin-axle - if you own one of those, the sizing guidance below still applies.
Unlike motorhomes, a caravan has no engine and no alternator. The leisure battery is the only on-board power source, charged on a serviced pitch via the mains hook-up or from roof solar on sites with no electric. That makes battery capacity and charging strategy more important than on a motorhome - and it makes the switch from lead-acid to lithium a far more straightforward upgrade. For a broader overview of switching to lithium in any caravan, the caravan battery guide covers the fundamentals.
Sprite is generally dealer-fitted rather than factory-supplied with a leisure battery, with a minimum around 85Ah typically recommended. Most Sprite owners are choosing their first proper leisure battery, which makes lithium an easy call rather than a compromise on a legacy system. Sprite is also the entry range - for the upper Swift Group lines including the Challenger, Conqueror, Elegance, and Elegance Grande, see the Swift caravan guide.
Sizing a TITAN by Sprite caravan model
A starting point by model. Sprite is weight-conscious - payload headroom matters, especially on the smaller Alpine models. Measure your front locker before ordering.
| Model | How it gets used | Good fit |
|---|---|---|
| Alpine 4 / Alpine 4 DBLightest in the range (MTPLM 1247-1263kg). Payload headroom is tightest here - every kilogram counts on smaller tow vehicles. | Weekend touring, lights, fridge, phones, water pump | 100Ah (keep it light; measure locker carefully) |
| Major 4 SB / Major 4 EB - touringMid-size single-axle (MTPLM 1378-1383kg). Standard front offside locker, more payload to play with. | Regular touring - lights, fridge, heating controls, water pump | 100Ah to 120Ah |
| Major 4 SB / Major 4 EB - off-grid or moverMotor mover fitted, regular club certificated locations, longer off-grid stays. | Off-grid nights, motor mover use, extended trips | 150Ah |
| Sprite Quattro (older/pre-2026)Eight-foot-wide twin-axle Sprite from previous generations. More payload headroom than single-axle models. | Family touring or extended off-grid | 120Ah to 150Ah |
These are starting points, not fixed rules. The honest figure comes from your own loads - total them in the battery size calculator. Locker dimensions vary between model years and trim levels, so measure the space including terminal height before ordering. Watch single-axle payload carefully on the Alpine models. For a full walk-through of what to measure and why, see the caravan battery guide.
Where the leisure battery lives in a Sprite caravan
Sprite uses the same Swift Group architecture as the wider range. The leisure battery sits in an external battery locker at the front of the caravan, commonly on the offside, separate from the gas locker. This is a dedicated ventilated compartment designed for a standard leisure battery. Typical front lockers accommodate a battery roughly 225mm tall, 175mm deep and 353mm wide - but dimensions vary between model years and specification levels. Always measure your own locker, including the height available above the terminal posts with any terminal covers or retaining bars in place, before ordering.
The TITAN case is sealed to IP67, so it handles the damp and temperature swings of an external front locker without issue. The RJ45 comms ports drop to IP32 while a cable is connected - keep any plugged port clear of standing water. The DIN-format case sits low and stable without rattling on the road.
If you own an older Sprite Compact, note that compact two-berth models can carry a tighter locker than the standard front box - measure the space before assuming the same dimensions as a Major. The same careful measurement rule applies to any pre-2020 Sprite Quattro, where the larger body shell does give more room but does not guarantee a universal fit.
Charging your Sprite caravan's lithium battery
A caravan has no engine, so there is no alternator. Charging comes from three sources:
- 230V mains hook-up via the onboard charger. This is the primary source on a serviced pitch. The site supplies electric through the hook-up point and the onboard charger fills the leisure battery. Most Sprite caravans use a Sargent power system, and TITAN recommends setting the charger to a lithium profile. Check your charger against the charger compatibility list to confirm it can charge lithium correctly. A lithium battery charges considerably faster than the lead-acid it replaces - the battery is typically full well before you are ready to unpack.
- Roof solar through an MPPT controller. Solar is the key charging source on club certificated locations and any site without electric. An MPPT controller extracts significantly more from the panels than a basic PWM unit - if your Sprite has roof solar fitted, or you are adding panels, pair them with an MPPT controller alongside a lithium battery. The solar sizing guide helps you match panel area to your load and typical usage.
- Trickle charge via the 12S or 13-pin towing plug. While the caravan is being towed, the tow car sends a small charge to the van through the 12S or 13-pin electrical connection. This is a maintenance trickle, not a fast charge - it keeps the fridge running and gently tops up the battery on the move. It is not a substitute for mains or solar, but it means you arrive at a site with a slightly better state of charge than you left home with.
Motor mover and lithium. If your Sprite is fitted with a motor mover, lithium makes a meaningful difference. Motor movers draw a large surge current to get the caravan moving. A lead-acid battery that is even partially discharged can sag badly under this load, causing the mover to hesitate or cut out. A TITAN holds its voltage flat right through the surge, so the mover gets full power throughout the manoeuvre as the manufacturer intended. Higher usable capacity also means you can pitch, reposition, and move the van several times on the same charge without the anxiety of watching the battery drop.
Winter storage. Caravans often sit unused for several months over winter. Lead-acid batteries self-discharge steadily and suffer permanent capacity loss if left discharged. A TITAN lithium has a very low self-discharge rate and tolerates long storage periods without degradation. The custom BMS includes a built-in low-temperature heater that allows the battery to charge safely down to -30C - so if you connect it to solar or mains during winter, it charges correctly regardless of ambient temperature. Every TITAN carries a lifetime, fully transferable warranty.
