Can I use more than one charging method at the same time?

Yes – in fact, combining charging methods often gives the best results. For example, many KickAss DCDC chargers can take input from both your vehicle's alternator and a solar panel at the same time, switching automatically between them as needed.

Do I need a DCDC charger if I already have a solar panel?

If you're charging while driving and especially if you're using lithium batteries, a DCDC charger is highly recommended. It ensures your battery receives the correct voltage and charging profile, which solar alone can't provide while the engine is running.

What's the difference between MPPT and PWM solar controllers?

MPPT (Maximum Power Point Tracking) controllers are more efficient and extract more power from your solar panels, especially in variable light conditions. PWM (Pulse Width Modulation) controllers are cheaper and simpler but don't perform as well, especially with larger or higher-voltage solar arrays.

How to Charge Your 12V Battery: The Best Options for Every Setup

Whether you’re powering a fridge during your weekend away in the bush or running a full off-grid camp setup, keeping your 12V battery charged is essential. But with so many charging options available, it can be tricky to know which one’s best for your needs. From plug-in AC chargers to solar and in-vehicle options, this guide breaks down the most common ways to charge your 12V battery and when to use them.

1. AC Battery Chargers (Mains Power)

Best for: Home charging, garage setups, caravan parks
Example: KickAss range of ACDC Chargers

An AC charger draws power from a standard 240V mains outlet and converts it to 12V DC for your battery. These chargers are ideal for topping up or maintaining your batteries before a trip, or when parked somewhere with grid power.

KickAss ACDC chargers feature multi-stage charging to maximise battery life, and they’re smart enough to safely charge AGM, lithium, and other battery types. Some models even have a recondition mode for reviving tired AGM batteries, and a lithium wake-up mode.

2. DCDC Chargers (Vehicle Charging)

Best for: Charging while driving
Example: KickAss range of DCDC Chargers

If you're running a dual battery system in your 4WD, caravan, or camper trailer, a DCDC charger is a must. Unlike basic isolators or relays, DCDC chargers provide a controlled, multi-stage charge that’s safe for lithium batteries and compatible with modern smart alternators.

DCDC chargers draw power from your vehicle’s alternator while you drive, and many (like the KickAss range) also support solar input – meaning they double as a solar regulator when you’re parked up.

3. Solar MPPT Chargers (Solar-Powered Charging)

Best for: Off-grid campsites, remote touring
Example: KickAss range of Solar MPPT Chargers

Solar is a free, quiet, and reliable way to charge your 12V batteries when you’re off the grid. An MPPT (Maximum Power Point Tracking) solar regulator ensures your solar panels operate at peak efficiency, converting every available bit of sunlight into usable power.

KickAss MPPT regulators adjust in real time to changing light conditions and can dramatically outperform older PWM-style regulators, especially in low light or partial shade.

4. PWM Solar Controllers (Basic Solar Charging)

Best for: Budget builds, small solar panels, older battery types
Example: KickAss PWM Solar Regulator

PWM (Pulse Width Modulation) solar controllers are a simpler, more affordable type of solar regulator. They work by gradually reducing the current to the battery as it reaches full charge, helping prevent overcharging.

While they’re fine for smaller systems with modest solar inputs and basic AGM or lead acid batteries, PWM controllers are far less efficient than MPPT. They don’t maximise the output of your solar panels, especially in low light, high temperature, or partial shade conditions.

If you’re using lithium batteries, want to charge quickly, or plan to run high-draw appliances like fridges or inverters, we strongly recommend stepping up to an MPPT controller for better performance and battery health.

5. Alternator-Only Charging (Without a DCDC)

Best for: Budget-conscious setups (but not ideal for lithium)
Example: Basic dual battery isolator or VSR

Some vehicles rely on a simple isolator to connect the starter and auxiliary battery. While this setup can work for AGM or lead acid batteries, it doesn’t provide the multi-stage charge required by lithium batteries and can struggle with smart alternators. It’s an outdated method, and we don’t recommend it for serious off-grid systems.

6. Solar-Ready Power Stations & Battery Boxes

Best for: Portable power and weekend getaways
Example: KickAss range of Battery Boxes and Solar Generators

For those who want a compact, all-in-one charging solution, power stations and advanced battery boxes are a great option. Many models include built-in DC charging inputs, solar MPPT regulators, and even AC charging ports. Just plug in your solar panel, vehicle, or wall charger, and let the system handle the rest.

Final Word

The best 12V charging setup depends on your battery type, how you travel, and how long you're off-grid. For most adventurers, a combination of DCDC and solar charging offers the most flexibility and reliability. And if you’re staying put at a powered site or prepping before a trip, an AC charger is a handy backup.

Need help choosing the right charger? Drop into one of our retail stores, or reach out to our team of 12V experts on (07) 3123 4715 for personalised advice.