The lithium battery for your Elddis motorhome.
Elddis builds its coachbuilt and campervan ranges around the same Peugeot Boxer and Fiat Ducato platforms that sit under most UK motorhomes, which means the TITAN DIN lithium drops straight into the battery locker. Same format, full rated capacity you can actually use, and a weight saving you can put back into payload.
Elddis ranges and base vehicles
Elddis is part of the Erwin Hymer Group UK and designs its vehicles at Consett, County Durham. The current range runs across coachbuilt motorhomes and campervans, split between two base platforms - the Peugeot Boxer and the Fiat Ducato. Both carry Euro 6 engines with variable-voltage smart alternators, and both take the same DIN leisure battery format.
On the coachbuilt side, the Whirlwind GT and GT Evolve are the entry coachbuilt on the Boxer, the Autoquest APEX is the mid and high coachbuilt on the Ducato with an 8-speed automatic gearbox, and the Avalon and Avalon Evolve are the flagship Ducato coachbuilts that replaced the Encore. On the campervan side, the Whirlwind GTV runs on the Boxer and the Autoquest CV, CV Evolve and Autoquest APEX CV run on the Ducato. All current coachbuilt models are 3,500 kg and Category B licence; the Autoquest APEX 196+ layouts and some six-berth Whirlwind GT models are 3,650 kg and require a C1 licence.
If you want to compare how Elddis sits alongside other UK brands, the motorhome brands hub covers the full picture. For the wider motorhome battery question, start with the motorhome battery guide.
Sizing a TITAN for an Elddis
Factory Elddis leisure batteries are sealed lead-acid, typically 85 to 110Ah, and you can only safely use about half. A like-for-like lithium already doubles your usable power before you go any larger.
| Range | How it gets used | Good fit |
|---|---|---|
| Whirlwind GT / GTV (Peugeot Boxer)Entry coachbuilt and campervan; 3,500 kg, payload-conscious | Site and touring; smaller 12V loads, overnight hook-up gaps | 100Ah to 150Ah |
| Autoquest APEX + CV (Fiat Ducato)Mid and high coachbuilt, 8-speed auto; campervans | Touring and moderate off-grid; fridge, heating, devices, water pump | 120Ah to 180Ah |
| Avalon (Fiat flagship)Flagship coachbuilt, 140 or 180 bhp Ducato; Evolve with solar prep | Off-grid and extended stays; heavier 12V kit, Alde heating fan | 150Ah to 230Ah |
These are starting points, not a fixed rule. The right size comes from your actual loads, so total them in the battery size calculator. For heavy 12V use or an Alde fan, 180Ah is usually the sweet spot; 230Ah suits sustained off-grid use. Always measure your battery locker, including terminal height, before ordering.
Where it fits on an Elddis
Battery location differs by body type on Elddis vehicles, and it is worth knowing before you measure:
- Coachbuilt motorhomes (Whirlwind GT, Autoquest APEX, Avalon). The leisure battery lives in a dedicated external side battery locker - a separate hatch on the side of the motorhome, distinct from the gas locker. This is a proper battery-only compartment with good access, and the DIN format sits cleanly inside. Measure the internal locker dimensions, including the height with the lid closed, and check against the battery datasheet before ordering.
- Campervans (Whirlwind GTV, Autoquest CV). Location varies by layout and model year. It is most commonly under a seat or in a floor compartment - check your handbook for the exact position. The low, flat DIN case suits under-seat voids well, but the fit depends on the specific van build, so measure rather than assume.
Because the TITAN case is sealed to IP67, it handles the damp that builds up in external lockers and floor voids. The RJ45 comms ports drop to IP32 with a cable plugged in, so keep those clear of standing water. Terminal height is the dimension most often overlooked on DIN lockers - include it in your measurement.
Charging on an Elddis
An Elddis motorhome or campervan charges the leisure battery from three sources: mains hook-up through the onboard charger, roof solar through an MPPT controller, and the engine alternator while you drive. Lithium takes all three faster than lead-acid, so a decent drive or a sunny afternoon puts real capacity back rather than a slow trickle.
The alternator is where the Elddis base platforms need a little thought. Both the Euro 6 Peugeot Boxer and the Fiat Ducato run a variable-voltage smart alternator that will not reliably fill a lithium battery on its own. The fix is a DC-DC (battery-to-battery) charger - a Victron Orion is what we would fit every time. It gives the lithium a clean, controlled charge and protects the starter battery at the same time. Evolve models with solar prep make it straightforward to add an MPPT alongside, which is often a better primary charging source anyway. 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.
Check your existing onboard charger against the charger compatibility list, plan the roof with the solar guide, and size the battery around the gap your charging cannot cover. Every TITAN carries a custom BMS, charges safely down to -30C, and comes with a lifetime, fully transferable warranty.
