DC-DC Voltage Reducers

DC-DC Voltage Reducers: 24V to 12V Power Solutions.

If you are operating a heavy commercial vehicle, tractor, or a large marine vessel, you likely have a 24V battery system. However, the vast majority of RV and marine accessories—such as fridges, LED lights, and charging ports—are designed to run on 12V. A DC-DC Voltage Reducer (or converter) is the essential link that allows you to safely operate these 12V appliances from your 24V bank without damaging your equipment or unbalancing your batteries.

At RV World, we supply robust, high-performance voltage reducers from industry leaders Redarc and Enerdrive, built to handle the demanding electrical environments of New Zealand’s commercial and marine sectors.

Why Use a Dedicated Voltage Reducer?

While it may be tempting to "tap off" 12V from just one of the batteries in a 24V series, this causes a significant imbalance that will lead to premature battery failure. A dedicated DC-DC converter ensures a clean, stable 12V output while drawing power evenly across your entire battery bank. Key benefits include:

• Equipment Protection: Provides a constant 12V nominal output (usually set at 13.8V) regardless of the fluctuations in your 24V input.
• High Efficiency: Modern switch-mode technology ensures minimal heat generation and power loss during the conversion process.
• Compact & Rugged: Designed to withstand the high vibrations of trucks and heavy machinery.

Charge Equalizers vs. Reducers

In addition to standard reducers, we stock specialized Redarc Charge Equalizers. These are designed for more complex setups where you may have a mix of 12V and 24V loads. The equalizer ensures that both batteries in a 24V bank receive an equal charge from the alternator, even if you are drawing power for 12V accessories, effectively doubling the life of your batteries by preventing overcharging and undercharging cycles.

Finding the Right Amperage for Your Needs

When selecting a voltage reducer, it is vital to calculate the total current draw of the appliances you plan to run simultaneously. We offer various capacities, such as the Enerdrive 25A Reducer, which is perfect for running a 12V compressor fridge and lighting circuit, or more compact 10A units for basic electronics. Browse our selection today and ensure your 24V vehicle is fully equipped with the 12V comforts you need.