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power setups for under hood cabin and topper

Power Setups for Under-hood, Cabin and Topper.  

In this blog, REDARC delve into one of the numerous approaches to setting up power under the bonnet, in the cabin or in your topper. The products have been categorized into basic, better, and ultimate solutions, making it easier for you to find your ideal setup.


Under-hood Power Setup

An under-hood setup often works better in older vehicles that have space in the engine bay or in more typical 4x4 vehicles. The advantage of having a dual battery system under the hood is that it provides more room, and you can just ‘set and forget’.

Basic - SBI12

The Smart Start Battery Isolator range protects your primary battery by using your alternator to charge your auxiliary battery. REDARC’s Dual Battery Isolators are compact in size and easy to install under-hood. Not to mention, they have a sophisticated fault detection system that warns of over-voltage, voltage drops and excessive draw conditions. Run all your 12V accessories including a fridge, compressor, UHF. They are considered REDARC’s basic option as they cannot be monitored.

Better – BCDC

This rugged battery charger can withstand temperatures up to 50 degrees. REDARC’s BCDC not only charges an auxiliary battery when the vehicle is running, but can easily connect to a portable solar panel or blanket via an Anderson plug for added charge. This BCDC option is considered better than the SBI, due to its optimum charging every time and suitability for all battery types including lithium, AGM, GEL standard lead acid and calcium.

Ultimate - BCDC and SBI12

For the ultimate set up, pair the REDARC Smart Start Battery Isolator with a BCDC. The benefit of the DC charger and Smart Start Battery Isolator running in unison is that if your vehicle has a flat battery, the SBI can jump start it at the touch of a button.

With all this power and the ability to withstand the harshest conditions, you can count on this Ultimate REDARC set up for your next adventure. Shop 12V battery isolators at REDARC with free shipping in the contiguous US.

Cabin Power Setup

Having a cabin power setup means that you have easy access to connecting 12V accessories and there’s typically more room for larger battery systems.

BCDC with Dual Battery Gauge

REDARC reccomend the REDARC BCDC paired with a dual battery gauge, as the ultimate cabin power setup, as it creates visual and audible alerts of your battery voltage. REDARC’s Dual Battery Gauge is a quick and easy way to check everything's running smoothly in the truck, monitoring both the start and auxiliary battery. REDARC's dual battery gauge monitors your battery voltages and has customizable warnings and lighting colors.

Topper Power Setup

Run anything from a dual battery charger like a BCDC, Manager30 Battery Management System and a RedVision TVMS in your topper to keep your batteries charged.

Most commonly trucks and 4x4 vehicles are built with just one starting battery, hence it’s a good idea to install a second battery for auxiliary purposes. Increased battery capacity enables loads to run when the vehicle is turned off. Topper installs are perfect for a lithium battery, as they are unable to be installed in the engine bay. With the auxiliary battery in the topper, you can arrange your REDARC power products around it to suit your travel needs.

Basic - BCDC

Enhance the capabilities of your vehicle, by incorporating REDARC's BCDC Dual Input Battery Chargers. Fit this device in the topper to prevent any voltage drop issues and charge your auxiliary battery to 100%. We recommend the BCDC to be mounted within 1-metre of the auxiliary battery, for optimal performance of the charger.

The BCDC is a lithium battery, protected from water, dust, humidity, mud and heat. It also protects your start battery from excessive discharge, while ensuring optimum performance from 12V gear. Additionally, it serves the purpose of safeguarding your start battery from excessive discharge, while also ensuring optimal performance from your 12V equipment.

The REDARC BCDC includes built-in Green Power Priority and will select solar charging first, meaning less load on the alternator. Suitable for 12 or 24V systems, the unit will also work with either standard or variable/smart alternators.

Better - Manager30

Compact in size and designed with installation in mind, a vehicle battery monitoring system will take your adventure a step further. REDARC’s Manager30 installed in the topper, keeps your batteries charged by taking power from the vehicle’s alternator, as well as solar and mains power. This means that no matter whether you are parked up or on the road, there’s always charge going back into the batteries. The Manager30 operates like 6 separate products, it charges an auxiliary battery from the vehicle while on the move, it’s a 240-volt charger, a solar regulator, a battery isolator, a load disconnect controller, all with a remote colored RedVision battery monitor, making it market-leading.

Ultimate - Manager30 with RedVision Prime or Rogue

REDARC’s Combo RedVision System is the ultimate off-grid power solution, manage your power anywhere, anytime with RedVision from REDARC. Combining the smarts of the TVMS Rogue or TVMS Prime and the power of the Manager30, this product allows you to manage your power requirements and control your 12V circuits with the touch of a button.

Not only do you have six dedicated tank level sensor inputs, two ambient temperature inputs and a voltage sensor, but also two configurable analogue sensors to use for anything from water levels, temperature, or voltage. It’s a one stop shop for control and monitoring.

The Combo RedVision System includes everything you need to power your next build, just add batteries, cables, and fuses. Control all accessories from your smartphone* and get battery vitals with the Manager30, monitor water levels, temperature etc.

With two RedVision color displays, one on each side of the topper, all accessories can be controlled from multiple points around the vehicle, as well as through the RedVision smartphone app.


*TVMS Rogue Configurator app is now available for both iOS and Android, it’s only required for initial installation and setup.

Easy to install and use in the topper along with all your other 12V gear. Having all this gear in one place makes it easy, providing a centralized and organized location for your power equipment and making it easier to access and manage.


Free up valuable space in the cabin or under the bonnet and allow for a convenient and clutter-free interior.


To learn more about taking the next step up for your off road travel - please read out blog Weekend 12 Volt Guide.

Here at REDARC we have a “customer is king” policy, if you require any further assistance REDARC’s Tech Support Line will always be happy to assist you, phone REDARC at (+1 (704) 247-5150) or visit the REDARC website