Caravan Solar, Lithium & 12V Upgrades

Total Mobile Mechanical Services provides planned caravan solar, LiFePO4 lithium battery, DC-DC charging and 12-volt touring-system upgrades across Gladstone, Calliope and surrounding areas.

We work on suitable systems fitted to caravans, camper trailers, motorhomes, recreational vehicles and tow vehicles.

A reliable off-grid system requires more than adding a larger battery or another solar panel. Battery capacity, expected daily use, charging sources, cable size, circuit protection and component compatibility all need to be considered together.

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Discuss a caravan solar, lithium or 12V upgrade.

Caravan Solar-System Upgrades

A solar system should be matched to the battery type, usable battery capacity, daily electrical load and the way the caravan is used.

Suitable caravan and RV solar work may include:

Roof-mounted solar panel upgrades
Portable or folding solar connections
Replacement of failed or damaged panels
Solar regulator upgrades
MPPT charging systems
Solar wiring and connector upgrades
Fuse and isolation improvements
Solar integration with lithium or AGM batteries
Solar input through compatible DC-DC chargers
Battery and solar monitoring

Simply increasing panel wattage does not guarantee better charging. Shading, regulator capacity, battery acceptance, cable size, voltage drop and daily consumption all affect the result.

LiFePO4 Caravan Battery Installation

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

Before changing from AGM or lead-acid batteries to lithium, the following should be checked:

Solar-regulator compatibility
DC-DC charger charging profile
Plug-in charger compatibility
Battery-management-system requirements
Cable size and terminal condition
Fuse and circuit-breaker ratings
Battery isolation
Mounting and restraint
Expected loads and peak current
Battery-monitor configuration

Suitable lithium work may include:

LiFePO4 battery supply and installation
AGM-to-lithium caravan conversions
Battery-bank upgrades
Battery monitor and shunt installation
Protection and isolation upgrades
Charging-profile configuration
High-current cable and terminal improvements

Caravan DC-DC Charger Installation

Modern tow vehicles may use smart alternators that do not provide a stable charging voltage through a basic cable connection. A correctly selected DC-DC charger can manage vehicle charging and provide the required battery profile.

DC-DC charging work may include:

DC-DC charger supply and installation
Smart-alternator compatible systems
Ignition-trigger and control wiring
Solar-input DC-DC chargers
Vehicle-to-caravan cable upgrades
Anderson-plug circuit upgrades
Input and output fuse protection
Voltage-drop testing under charging load
Charger mounting and cooling assessment
Lithium and AGM charging-profile setup

The tow vehicle’s starter battery, alternator operation and existing wiring should be assessed as part of the complete charging system.

Battery Monitors & Power Management

Battery voltage alone does not always provide an accurate indication of remaining usable capacity, particularly with lithium systems.

Suitable monitoring and management upgrades may include:

Current shunts
State-of-charge monitors
Remote displays
Bluetooth battery monitoring
Low-voltage protection
Battery isolators
Emergency disconnects
DC distribution improvements
Fuse and circuit-breaker upgrades

A monitoring system must be correctly installed and configured to provide useful information.

Caravan Inverters & High-Current DC Supply

Inverters can place a significant load on a battery system. The battery capacity, cable size, protection, expected appliance load and available charging capacity must be considered before installation.

Our suitable low-voltage work may include:

Battery-capacity and load assessment
12-volt or 24-volt inverter supply circuits
High-current battery cable
Battery-side fuses and circuit breakers
DC-side isolation
Voltage-drop testing
Connection-temperature checks
Integration with suitable lithium systems

Fixed 240-volt caravan wiring, power points, switchboards and mains-side connections require an appropriately licensed electrical contractor.

Tow-Vehicle & Caravan Charging Integration

A well-designed caravan system can still underperform when the tow-vehicle side is inadequate.

We can assess suitable connected systems involving:

Alternator and starter-battery condition
Smart-alternator control
Vehicle cable sizing
Anderson-plug circuits
Earth connections
Charging voltage under load
DC-DC charger input
Trailer connections

This provides a complete path from the vehicle charging source through to the caravan battery bank.

Upgrade Work Versus Fault Repairs

This page is intended for customers wanting a larger, better or more capable touring power system.

Customers experiencing an existing fault such as a flat battery, failed charger, intermittent wiring problem or low solar output should first use our CARAVAN AUTO ELECTRICAL REPAIRS service.

Testing the existing system first may reveal that a repair or configuration correction is more appropriate than replacing the complete system.

Related Caravan & RV Services

Frequently Asked Questions

Do you install caravan solar systems in Gladstone?

We provide suitable caravan solar-system inspections, upgrades and low-voltage installation work across Gladstone, Calliope and surrounding areas.

Can you convert my caravan from AGM to lithium?

Suitable AGM-to-lithium conversions are available after the chargers, regulators, protection, wiring and expected electrical loads have been assessed for compatibility.

Do I need a DC-DC charger?

That depends on the tow vehicle, alternator behaviour, battery type, cable run and expected charging performance. Testing and system assessment should determine the correct setup.

Can I just add another solar panel?

Not always. The regulator capacity, battery type, existing wiring, roof space, shading and expected loads must be checked before additional panels are added.

Do you install caravan battery monitors?

Yes. Suitable shunt-based and compatible battery-monitoring systems can be installed and configured.

Do you work on motorhome solar and lithium systems?

Yes, where the system, vehicle size, access and required work suit our automotive low-voltage capability.

Do you install fixed 240V caravan wiring?

Fixed 240-volt wiring and mains-side electrical work require an appropriately licensed electrical contractor.