Caravan Auto Electrician Gladstone & Calliope

Complete caravan, RV and tow-vehicle auto electrical services for solar systems, LiFePO4 lithium batteries, DC-DC chargers, battery management, Anderson plugs, trailer wiring and difficult 12-volt charging faults.

Total Mobile Mechanical Services provides caravan auto electrical diagnosis, repairs and suitable system upgrades across Gladstone, Calliope, Tannum Sands, Boyne Island and surrounding areas.

Our auto electrical capability allows us to inspect the caravan and tow vehicle as one connected system. That matters because poor charging, hot plugs, flat batteries, brake-controller faults and low solar performance may originate in the caravan, tow vehicle, wiring, cable sizing, earths, protection devices or charging equipment.

Rather than replacing batteries or chargers based only on the symptom, we can test how power is being generated, transferred, controlled, stored and used throughout the system.

CLICK HERE TO RING US: 0456 765 135

Book caravan solar, lithium battery, DC-DC charging or 12-volt electrical work.

Complete Caravan and RV Auto Electrical Services

We work on suitable automotive low-voltage systems fitted to caravans, camper trailers, motorhomes, fifth wheelers and tow vehicles.

Caravan and RV 12-volt electrical fault diagnosis
LiFePO4 lithium battery supply and installation
AGM-to-lithium battery conversions
Battery-bank upgrades and replacements
Fixed and portable solar charging systems
Solar panel, regulator and wiring diagnosis
DC-DC charger supply, installation and repairs
Anderson plug installation and circuit upgrades
Smart-alternator charging solutions
Battery monitors, shunts and remote displays
12-volt and suitable 24-volt power distribution
Trailer plugs, road lights and clearance lights
Electric brake-controller and breakaway wiring
Reversing cameras and suitable accessory circuits
Fridge supply, charging and towing-related DC circuits
Fuse, circuit breaker, isolator and cable upgrades
Voltage-drop, load and earth testing

Caravan Solar Panel Systems and Repairs

A solar system must be matched to the battery type, battery capacity, daily electrical load and the way the caravan is used. Simply adding another solar panel does not guarantee that the battery bank will charge correctly.

We can inspect, repair and upgrade suitable caravan and RV solar systems, including:

Roof-mounted solar panel systems
Portable and folding solar panel connections
Solar panel replacement and capacity upgrades
Solar regulator diagnosis and replacement
MPPT and PWM solar charging systems
Solar wiring, connectors, fuses and isolation
Low or intermittent solar-output diagnosis
Panel, cable and regulator voltage testing
Solar integration with AGM or LiFePO4 batteries
Solar input through compatible DC-DC chargers
Battery and solar monitoring displays

Low solar output may be caused by shading, panel damage, failed connectors, incorrect regulator settings, undersized wiring, poor earths, excessive voltage drop or a battery-management problem.

Testing the charging current and voltage under operating conditions helps identify whether the problem is the panel, regulator, wiring, battery or the way the components have been combined.

LiFePO4 Lithium Caravan Battery Upgrades

LiFePO4 lithium batteries can provide greater usable capacity and reduced weight compared with many traditional lead-acid battery systems. However, a lithium conversion should not be treated as a simple battery swap.

Before converting a caravan from AGM or lead-acid batteries to lithium, the complete charging and protection system should be checked for compatibility.

Our lithium battery work can include:

LiFePO4 battery supply and installation
AGM-to-lithium caravan battery conversions
Single and suitable multiple-battery bank setups
Battery-management system fault diagnosis
Internal and external BMS system checks
Battery monitor and shunt installation
State-of-charge monitoring systems
Low-voltage and over-current protection
Battery isolators and emergency disconnects
Cable, terminal and circuit-protection upgrades
Charger and solar-regulator compatibility checks
DC-DC charger profile and configuration checks
Battery mounting and connection inspection

A lithium battery may not charge correctly if the existing solar regulator, mains charger, DC-DC charger or tow-vehicle charging circuit is not compatible with its required charging profile.

We assess the battery bank as part of the complete caravan electrical system rather than installing a high-capacity battery into wiring or charging equipment that cannot safely support it.

DC-DC Chargers and Charging While Towing

Modern tow vehicles may use smart or variable-voltage alternators that do not reliably charge a caravan battery through a basic Anderson plug circuit.

A correctly selected and installed DC-DC charger can manage the charging voltage and battery profile while helping protect the tow vehicle and caravan circuits.

DC-DC charging work can include:

DC-DC charger supply and installation
Existing charger diagnosis and replacement
Smart-alternator compatible charging systems
Ignition-trigger and control wiring
Solar-input DC-DC charger systems
Lithium, AGM, gel and lead-acid charging profiles
Vehicle-to-caravan cable sizing
Anderson plug circuit installation and upgrades
Voltage-drop testing under charging load
Charger fuse, circuit breaker and isolation checks
Charger mounting and cooling assessment
Tow-vehicle alternator and starter-battery checks

A charger that switches off, overheats or produces low output may not be the failed component. The underlying cause may be low input voltage, undersized wiring, poor earths, incorrect settings, alternator behaviour or excessive resistance through plugs and connections.

Caravan Battery Chargers and Power Management

Caravan electrical systems may receive charging input from solar panels, the tow vehicle, a plug-in charger or a combination of sources. These inputs need to operate together without overcharging the battery or fighting against one another.

We can diagnose and work on the automotive DC side of suitable:

Multi-stage battery chargers
Lithium-compatible battery chargers
Battery management and distribution systems
Solar and alternator combined charging systems
Battery protectors and low-voltage disconnects
Fuse panels and DC distribution boards
Battery monitors and current shunts
Remote and Bluetooth monitoring systems
High-current cabling and battery connections

Any fixed household-style 240-volt wiring, power points, switchboards or mains-side electrical work must be completed by an appropriately licensed electrical contractor.

Caravan Inverters and High-Current DC Wiring

Inverters can place a substantial load on a caravan battery bank. The battery capacity, charging system, cable size, fuse protection and expected appliance load must all be considered before an inverter is fitted or upgraded.

Our automotive low-voltage inverter work can include:

Assessment of battery capacity and expected inverter load
12-volt or 24-volt inverter supply circuits
High-current battery cabling
Battery-side fuses, circuit breakers and isolation
DC-side inverter fault diagnosis
Voltage-drop and connection-temperature checks
Integration with suitable lithium battery systems

We do not claim to install or modify fixed 240-volt caravan wiring. Any mains-side connections must be completed by the appropriate licensed electrical contractor.

Anderson Plugs, Trailer Wiring and Tow Connections

Anderson plugs and trailer connectors operate in exposed conditions and regularly carry significant current. Loose terminals, corrosion, undersized cable and poor earth connections can cause charging failure, excessive heat and damaged plugs.

We can diagnose and repair:

Anderson plug charging circuits
7-pin and 12-pin trailer plugs
Trailer road lights and clearance lights
Electric brake-controller circuits
Breakaway battery and charging wiring
Fridge and auxiliary supply circuits
Reversing camera connections
Electronic stability-control power supplies
Damaged, corroded or poorly repaired wiring
Hot plugs, melted terminals and voltage loss

Mechanical caravan brake, bearing and suspension work is available through our CARAVAN BRAKES, BEARINGS AND SUSPENSION service.

Caravan Electrical Fault Diagnosis

Caravan electrical faults are often misdiagnosed because voltage may appear normal until the circuit is placed under load.

Depending on the fault, testing may include:

Battery condition and state-of-charge testing
Charging-voltage and current measurement
Voltage-drop testing under load
Earth and return-path testing
Cable-size and connection inspection
Fuse, circuit breaker and isolation checks
Solar panel and regulator output testing
DC-DC charger input and output testing
Parasitic current-draw diagnosis
Thermal inspection of hot connections where appropriate

The aim is to identify where power is being lost or incorrectly controlled before batteries, chargers, regulators or other expensive components are replaced.

Warning Signs Your Caravan Electrical System Needs Attention

The caravan battery does not charge while towing
The battery repeatedly goes flat
The solar system produces less output than expected
The DC-DC charger switches off or shows a fault
An Anderson plug or trailer connector becomes hot
Road lights or clearance lights work intermittently
Electric brakes do not respond correctly
Fuses repeatedly fail
The battery monitor gives inaccurate readings
Lights dim or equipment resets under load
There is visible corrosion, heat damage or melted wiring
The fault only occurs when the caravan is connected to the tow vehicle

Testing the Caravan and Tow Vehicle Together

One of our major advantages is the ability to inspect both the caravan and tow vehicle through the same mechanical and auto electrical business.

A caravan battery that will not charge may be caused by:

Tow-vehicle alternator operation
Smart-alternator control
Starter-battery condition
Undersized vehicle wiring
Excessive voltage drop
Damaged Anderson plugs
Poor vehicle or caravan earths
Incorrect DC-DC charger settings
Failed caravan battery or BMS protection

Tow-vehicle alternator, starter motor, battery drain and general wiring faults are covered through our STARTING, CHARGING AND WIRING REPAIRS service.

Because we also work on the towing vehicle’s mechanical systems, connected cooling, braking, suspension and towing concerns can be assessed through one workshop where practical.

Caravan, RV and Motorhome Electrical Support

Our caravan auto electrical work supports suitable:

Touring caravans
Camper trailers
Pop-top caravans
Fifth wheelers
Motorhomes
Work and site caravans
Tow vehicles and touring 4WDs

General caravan mechanical repairs are available through our CARAVAN MECHANICAL REPAIRS service.

Routine inspections and trip preparation are available through our CARAVAN SERVICING AND PRE-TRIP CHECKS page.

Motorhome base-vehicle repairs are covered through our RV AND MOTORHOME REPAIRS service.

Workshop and Mobile Caravan Auto Electrical Support

Extended diagnosis, solar and lithium upgrades, battery-bank work and high-current wiring are normally best completed through workshop facilities where the system can be safely accessed and tested.

Suitable mobile assistance may be available for:

Initial breakdown assessment
Trailer plug and road-light faults
Accessible battery and charging faults
Anderson plug problems
Faults preventing the caravan from being moved safely

Mobile attendance depends on the fault, location, access, safety, parts requirements and technician availability.

Why Choose Total Mobile Mechanical Services?

Qualified automotive electrical capability
Caravan and tow-vehicle systems assessed together
Solar, LiFePO4 battery and DC-DC charging experience
12-volt and suitable 24-volt diagnosis and repairs
Voltage-drop and load testing before expensive parts replacement
Mechanical, auto electrical, cooling and towing support through one business
Workshop repairs backed by suitable mobile assistance
Caravan brakes, bearings, suspension and mechanical servicing available in-house
Clear explanations before additional work is authorised

Frequently Asked Questions

Do you install caravan solar panels?

Yes. We can assess, supply, install, repair and upgrade suitable automotive low-voltage caravan solar systems, subject to the caravan, mounting suitability and required system design.

Can you convert my caravan from AGM to lithium batteries?

Yes. The existing solar regulator, DC-DC charger, battery charger, wiring and protection devices must first be checked for LiFePO4 compatibility.

Do you install DC-DC chargers?

Yes. Suitable DC-DC chargers can be supplied and installed with correctly sized wiring, circuit protection and charging profiles for the battery system.

Why is my caravan battery not charging while driving?

Possible causes include the tow-vehicle alternator, smart-alternator operation, voltage drop, undersized cable, poor earths, Anderson plug damage, charger settings or battery protection faults.

Can you diagnose a caravan solar system with low output?

Yes. The panels, wiring, connectors, solar regulator, battery and charging current can be tested to identify where output is being lost.

Do you install battery monitors and shunts?

Yes. Suitable state-of-charge monitors, current shunts and remote or Bluetooth displays can be installed as part of a battery or charging-system upgrade.

Can you inspect both the caravan and tow vehicle?

Yes. Connected charging, brake-controller, Anderson plug and trailer wiring faults can be tested across both sides of the combination.

Do you work on caravan 240-volt systems?

We work on automotive low-voltage and DC systems. Fixed 240-volt wiring and mains-side electrical work must be completed by an appropriately licensed electrical contractor.

Book Caravan Auto Electrical Repairs or Upgrades

Tell us the caravan or RV type, the tow vehicle, the current battery and charging setup, and what problem or upgrade you are considering. This helps us determine the testing, equipment and likely parts required.