The lithium battery for your Adria caravan.
From the entry-level Altea to the flagship Astella, every Adria caravan leaves the dealer with a lead-acid leisure battery that limits you to around half its rated capacity. A TITAN gives you close to 100% usable power in the same footprint, handles months of winter storage without degrading, and holds voltage rock-solid when the motor mover demands its peak surge.
Adria Mobil, Novo Mesto: one of Europe's most-exported touring caravans
Adria Mobil has been building touring caravans in Novo Mesto, Slovenia since 1965 - celebrating six decades of production in 2025. The Adria caravan range is one of the most widely sold in the UK outside of the domestic brands, built on AL-KO chassis with a body construction and specification that puts it alongside the best of the British makers. The UK touring range currently spans four main lines: the accessible Altea, the best-selling Adora (fully redesigned for 2026), the premium twin-axle Alpina, and the luxury flagship Astella (also redesigned for 2026). Adria also produces the compact Action range for a different buyer profile, and a broad motorhome range - but this guide covers Adria touring caravans only. If you own an Adria motorhome, the Adria motorhome battery guide covers your vehicle.
Unlike motorhomes, a caravan has no engine and no alternator. The leisure battery is the only on-board power source, charged either on a serviced pitch via the mains hook-up or from roof solar on a site without electric. That makes battery capacity and charging strategy considerably more critical than on a self-propelled vehicle - and makes the step from lead-acid to lithium a straightforward upgrade rather than a compromise on a legacy system. For a broader overview of switching any caravan to lithium, the caravan battery guide covers the fundamentals.
Adria supplies an external battery box as standard across the range - listed in the Altea specification as "external battery locker with mains input and sat/aerial input" and confirmed across Adora, Alpina, and Astella. The TITAN drops straight into this locker on most models. We always recommend measuring your own compartment, including terminal height, before ordering, as dimensions vary slightly between model years and trim levels.
Sizing a TITAN by Adria caravan model
A starting point by model line. Altea and Adora are single-axle - noseweight is the main constraint. Alpina and Astella offer more payload headroom on their twin-axle builds. All models use the same AL-KO chassis discipline around payload.
| Model | How it gets used | Good fit |
|---|---|---|
| AlteaEntry/mid range. Compact and lightweight - noseweight and locker dimensions are the main constraints on single-axle builds. | Weekend and regular touring, lights, fridge, water pump, heating controls | 100Ah |
| AlteaMotor mover fitted, club sites without electric, or longer touring breaks away from hook-up. | Off-grid stays, motor mover, extended touring | 120Ah to 150Ah |
| AdoraBest-seller. Fully redesigned for 2026, current range single-axle. Standard external battery locker on the nearside front. | Regular touring - lights, fridge, heating, water pump | 100Ah to 120Ah |
| AdoraMotor mover fitted, off-grid club sites, longer stays away from electric hook-up. | Off-grid use or motor mover | 150Ah |
| AlpinaPremium twin-axle. More payload headroom than single-axle models. Motor mover commonly fitted. | Touring with full onboard kit | 100Ah to 150Ah |
| AlpinaExtended stays, inverter use, or a twin-battery configuration with more payload to spare. | Extended off-grid, inverter, large appliances | 150Ah to 180Ah |
| AstellaLuxury flagship. High onboard load - Alde heating, large fridge, full entertainment fit as standard. | Touring with premium onboard kit | 120Ah to 150Ah |
| AstellaExtended off-grid stays, all loads running, or longer breaks without electric hook-up. | Extended off-grid and high-load use | 180Ah |
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 payload headroom on single-axle models, particularly the Altea and Adora. All Ah figures above link to a runtime guide showing what that capacity actually runs in a real caravan context.
Where the leisure battery lives in an Adria caravan
On Adria caravans, the leisure battery sits in a dedicated external battery box on the nearside front of the van - a lockable, ventilated compartment separate from the gas locker. Adria lists this as standard equipment across the range: "external battery box and mains inlet point" appears in the specification sheets for Altea, Adora, Alpina, and Astella. The mains inlet point and often the satellite/aerial connections are routed through the same locker, so it is easy to identify at the front nearside of the van.
Exact dimensions vary between model years and trim levels. The compartment is designed for a standard DIN-format leisure battery. Always measure your own locker - including the height available above the terminal posts and any retaining bar or lid closure - before ordering. The Alpina and Astella have more generous body proportions and typically offer more locker volume, but the principle is the same across all models: measure before specifying a larger Ah size.
The TITAN case is sealed to IP67, so it handles the damp, condensation, and temperature swings of an external nearside locker without issue. The RJ45 comms ports drop to IP32 while a cable is connected - keep any plugged port clear of standing water. Because the TITAN case is DIN-format and purpose-built for leisure battery lockers, it sits low and stable without moving on the road.
If you are uncertain about your specific model year or locker configuration, check your Adria owner's handbook for the exact battery locker dimensions and any fitment notes from your dealer.
Charging your Adria 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 onboard charger fills the leisure battery from the site's electric supply. Adria caravans across the range use Alde or Truma heating and a mains power management system. TITAN recommends setting the charger to a lithium profile - check your charger against the charger compatibility list to confirm it charges lithium correctly. A lithium battery charges considerably faster than the lead-acid it replaces, so it is typically full before breakfast on a full hook-up.
- Roof solar through an MPPT controller. Solar is the key charging source on certificated locations and any site without electric. An MPPT controller extracts significantly more from the panels than a basic PWM unit - if your Adria is fitted with roof solar, an MPPT controller is strongly recommended alongside a lithium battery. The solar sizing guide helps you match panel area to your load. Solar provision is available across the Adria range and straightforward to retrofit on any model.
- 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 tops up the battery gently on the move. It is not a substitute for mains or solar charging, but it means you arrive at the pitch with a slightly fuller battery than you left home with.
Motor mover and lithium. If your Adria is fitted with a motor mover, lithium makes a clear difference. Motor movers draw a large surge current to get a heavy 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 under a heavier twin-axle van. A TITAN holds its voltage flat right through the surge, so the mover responds as the manufacturer intended throughout the full state of charge. The higher usable capacity also means you can manoeuvre the van several times on the same charge without anxiety about the battery dropping.
Winter storage. Adria caravans often stand unused for several months of the year. Lead-acid batteries self-discharge steadily and suffer permanent capacity loss if left discharged over winter. A TITAN lithium has a very low self-discharge rate and tolerates long storage periods without degradation. The built-in low-temperature heater in the custom BMS means the battery charges safely down to -30C - so if you connect it to solar or mains during the winter months, it charges correctly regardless of ambient temperature. Every TITAN carries a lifetime, fully transferable warranty.
