Exotronic Axion Lithium Battery Venting Manual

EXOTRONIC

Axion Battery
Safety Vent Installation Guide

For Exotronic 12V 300Ah Axion CANBus Bluetooth Lithium Battery (Not applicable to the Marine Version)

Use only 10 mm OD PTFE tube Cut square, push fully into the Axion vent fitting and support the tube.

Maximum 1 m total tube length Keep the path short and direct from battery vent to outside.

Outlet must be lower than the battery vent Route downward and avoid upward loops or water traps.

Terminate outside with 1/2 in fine mesh vent The outlet must stay open, protected and unable to draw in water.

Example of Axion battery vent tube routed downward through the caravan floor

! Important safety note

This guide covers the Axion battery dedicated safety vent tube only. The complete caravan battery compartment, cable penetrations, sealing and electrical installation must still comply with all applicable standards, regulations and the caravan manufacturer requirements.

Do not modify, drill, open or pressure test the battery. Incorrect vent routing can allow water into the battery, restrict the safety vent pathway, or allow gases to enter the caravan interior.

Required installation rules

The Axion battery includes a dedicated vent connection for installations where external vent routing is required. Follow these rules for each Axion battery vented through 10 mm OD PTFE tube.

Item	Requirement
Vent tube	10 mm OD PTFE tube only. Cut the end square and clean.
Tube length	Maximum 1 m total length from the battery vent fitting to the external outlet.
Tube route	Route downward from the battery where practical. Keep the outlet and route lower than the battery vent height. Avoid upward loops, water traps and kinks.
External outlet	Vent to the outside of the caravan only. Use a 1/2 in fine mesh breather vent or equivalent weather-protected open vent.
Water protection	The outlet must not be submerged, placed where water pools, or positioned where spray can be forced into the tube. The vent must not be able to draw water back to the battery.
Air path	Do not cap, plug, reduce, glue shut, install a dense filter, or share with water, fuel, LPG, drain or cable conduit systems.
Battery clearance	Allow at least 10 mm clearance around the battery body and keep the vent fitting accessible for inspection.

Parts and tools

Required	10 mm OD PTFE tube; 1/2 in fine mesh breather vent or weather-protected external vent; suitable gland or weather seal for the caravan penetration; P-clips or cable-tie mounts for tube support.
Tools	Sharp tube cutter or blade, drill/hole saw suitable for the external vent or gland, deburring tool, measuring tape and inspection light.
Do not use	Soft rubber hose, PVC hose, undersized fittings, blocked caps, dense filters, shared plumbing, or any installation that allows water to enter the tube.

Installation sequence

Plan the route before drilling

Choose a short path to the outside of the caravan. Confirm the total tube length will be no more than 1 m and the final outlet will be lower than the Axion battery vent height.

Cut and prepare the PTFE tube

Cut 10 mm OD PTFE tube square. Remove burrs or crushed edges so the tube seats cleanly in the push-in vent fitting.

Connect to the Axion vent fitting

Push the tube fully into the 10 mm battery vent fitting. Gently tug the tube to confirm it has locked into place.

Route downward and support the tube

Use smooth bends and secure the tube so it cannot kink, rub on sharp edges, melt on hot surfaces, or move during travel.

Penetrate to the outside

Run the tube through the wall or floor using a suitable gland or weather seal. Seal around the penetration without blocking the inside of the tube.

Fit the external mesh vent

Terminate the tube at a 1/2 in fine mesh vent or equivalent open breather vent. The vent should face downward or be weather-protected, remain open, and be located where water cannot pool or be forced into it.

Inspect and record

Check every item in the commissioning checklist before handing the caravan over to the customer.

Correct and incorrect vent routing

The vent path should be easy to inspect, short, open to the outside and protected from water. Common installation faults are excessive length, high loops, blocked mesh, and outlet locations that can collect or draw in water.

Correct install

Correct Axion vent tube installation with short downward route through the caravan floor

Short downward path with no side-wall vent visible.

Incorrect install

Incorrect Axion vent tube installation with outlet positioned above the battery vent height

Outlet is positioned above the battery vent height.

Do not install the vent this way

Do not exceed 1 m total PTFE tube length.
Do not route the tube above the Axion battery vent height or create a high loop.
Do not terminate inside the caravan, under a bed, in a cupboard, in an annex, or in any habitable area.
Do not terminate under a floor section where road spray, creek crossings, wash-down water or pooling water can enter the vent.
Do not cap the vent or use a filter/mesh that can clog and restrict the vent path.
Do not connect the vent to water tanks, drains, LPG systems, fuel systems, cable conduits or other services.
Do not use compressed air, suction or pressure testing equipment on the battery vent.
Do not join more than 3 batteries together on a single vent.

Do Install a warning sign near the safety vent

! Battery safety vent fitted. Keep external vent open and clear. Do not block, cap, submerge or pressure wash directly into the vent. Inspect after off-road travel, water crossings, cleaning, or service work.

Commissioning checklist

10 mm OD PTFE tube fitted to Axion vent fitting and locked in place.
Total tube length from battery to outside outlet is 1 m or less.
Tube route falls away from the battery and does not rise above the battery vent height.
No kinks, crushed sections, tight bends, rubbing points or hot-surface contact.
External vent is outside the caravan and lower than the Axion battery vent height.
External vent uses 1/2 in fine mesh or equivalent open weather-protected vent.
External vent location cannot pool water, become submerged, or force spray into the tube.
Tube penetration is weather sealed around the tube/gland without blocking the tube.
Battery remains secured upright with at least 10 mm clearance around the body.
Customer has been shown the external vent location and inspection requirement.

Installer notes

This document is an installation guide for the Axion battery dedicated vent tube. The complete electrical system, battery compartment design, sealing from habitable areas, cable penetrations, labels and user instructions remain the responsibility of the installer, vehicle builder or competent person completing the installation.

Always install in accordance with the Axion battery specifications, applicable Australian Standards, local regulations, and any caravan manufacturer requirements. Contact Exotronic if the required installation cannot meet the 1 m maximum tube length, downward routing, outside termination, or water-ingress requirements.

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