4WD Electrical Perth
Dual Batteries, Solar & 12V Setup Experts

Got big plans for your 4×4? Don’t let your electrical system be the weak link. At Coastals 4×4, our 4WD electrical experts in Perth can design and install the ideal 12-volt setup for your needs. We handle everything from dual battery systems to run your fridge, to solar charging for extended trips, to installing UHF radios and lighting. As a combined mechanical and auto-electrical workshop, we offer a one-stop solution to power your adventures. With top brands like Redarc, Projecta, and Century on our shelves, you’re guaranteed reliable performance whether you’re touring the outback or camping off-grid.

Dual Battery Systems

One of our most popular upgrades is adding a dual battery system. This involves installing a second deep-cycle battery (usually in your engine bay or tub) dedicated to running accessories so you don’t drain your starting battery. We are Perth’s specialists in dual battery setups, offering:

  • DC-DC Chargers: We strongly recommend using a DC-DC charger (battery isolator/charger) to manage the charge to your auxiliary battery. We stock models like the Redarc BCDC line and Ctek D250SE, which ensure your second battery charges efficiently and safely from the alternator and even solar input. These smart chargers handle modern smart alternators and multi-stage charging, extending your battery life.
  • Battery Options: We offer deep-cycle batteries including AGM, Gel and Lithium (LiFePO4) in various capacities (50Ah up to 200Ah+). AGM batteries are a cost-effective reliable choice for most setups, while lithium batteries are gaining popularity for their light weight and usable capacity (great for running fridges long-term). We’ll help size the battery (or batteries) based on your power usage – e.g., a 110Ah AGM can typically power a 12V fridge and camp lights for 1-2 days without charging.
  • Professional Installation: Our auto-electricians securely mount the second battery with a bracket or battery box, run heavy-gauge cables with proper fusing, and connect a dash-mounted battery monitor or volt gauge if desired. The install is neat, with attention to vibration resistance and heat shielding. When done, you’ll have a turnkey dual battery system that automatically charges while you drive and isolates when parked, so you can run a fridge, camp lighting, or chargers without fear of a flat main battery.

12V Accessories & Installations

 Beyond dual batteries, we supply and fit a wide range of 12-volt accessories to make your 4WD more capable and comfortable:

  • Fridge & Accessory Outlets: We can wire up merit plugs, cigarette lighter sockets, USB outlets or Anderson plugs in your cargo area so you can easily power a fridge, air compressor or other devices. Tidy outlet panels in the rear of your wagon or canopy make plugging in accessories a breeze. We use quality marine-grade wiring to ensure durability.

  • Solar Panels & Chargers: For those who camp for days at a time, adding solar panels keeps your batteries charged. We offer fixed rooftop solar panels as well as portable folding solar kits. Combined with an MPPT solar regulator or integrated in a Redarc charger, solar will top up your batteries whenever the sun is out. Enjoy free, silent power – perfect for remote campsites in WA where the sun is abundant.

  • Inverters: Need to run 240V appliances off-grid? We can install a pure sine wave inverter to power things like laptops, camera chargers, or even a coffee machine. Our range includes compact 300W inverters up to heavy-duty 2000W units for bigger gear. We’ll advise on the right inverter and ensure your dual battery setup can support it.

  • Lighting: A good lighting setup makes life easier at camp and on tracks. We fit LED light bars and spotlights for night driving (connected via proper relays and switches). We also install camp lights like LED strip lights inside canopies, awning lights, or rock lights around your vehicle. All switches can be neatly integrated into your dash or a switch panel.

  • UHF Radios & Comms: Stay connected on the trails – we supply GME and Uniden UHF radios including both in-car units and handhelds. We’ll mount your UHF in a convenient spot, route the antenna onto a bullbar or roof bracket, and tune the system for optimal range. Communications are critical in convoy or emergency situations, and our expert installs mean loud and clear reception across Perth and beyond.

  • Other Accessories: Dash cams, reversing cameras, trailer brake controllers, central locking upgrades – you name it, our qualified technicians can wire it up. We love custom projects too, like complete canopy/tourer fitouts with fuse blocks and control panels. All work is done to auto electrical standards for safety and reliability.

Why Choose Coastals for 4WD Electrical?

 Electrical work on 4x4s can be complex – but our team has decades of experience building robust 12V systems. Here’s what sets us apart:

  • Expertise: Our staff includes licensed auto-electricians who specialize in 4×4 and camping setups. We understand the unique demands of off-road travel – vibrations, heat, dust and long hours of usage. We design systems accordingly, using quality components and proper routing to avoid faults.

  • Quality Components: We don’t cut corners. From Redarc dual battery isolators (renowned for reliability) to Narva fuses and Deutsch connectors, we use parts that meet or exceed OEM specs. This means your electrical upgrades will be as dependable as your vehicle itself.

  • Integration: Already have some gear? We can integrate new upgrades with your existing setup. For example, connecting solar into an existing dual battery, or adding extra outlets to a pre-wired canopy. We troubleshoot and ensure all components play nicely together, giving you a seamless electrical system.

  • Safety: Messy wiring can lead to shorts or even fires. Our installations are safe, with all circuits properly fused and insulated. We route cables away from sharp edges and hot areas, and provide clear labeling. We can also supply fire extinguishers and cut-off switches for added safety in your rig.

  • Support: After installation, we walk you through the setup. We’ll explain how your dual battery works, what to do and not to do (for instance, not overloading your inverter), and how to monitor your system. We stand by our work – if you ever have an issue on the road, you can call us for support, and we’ll make things right.

With a well-designed 12V system, you’ll have the freedom to run a campsite fridge indefinitely, charge devices, light up the camp and more – all off the grid. No more melted ice or dead phone batteries in the bush!

Ready to Upgrade
Your 4WD Electrical?

Use our Contact Form or call us on (08) 9417 9930.

To visit our store head over to 68 Cutler Rd, Jandakot WA.

Our team is ready to help you!