How to Choose the Right 12V/24V Wireless Phone Charger for Your Van or Boat

A dedicated wireless charger for vans and boats is one of the most effective ways to ensure your phone is always charged and within easy reach. In many ways, it's become a vital accessory, as smartphones are now an essential part of everyday life.

A wireless charger is an excellent solution because you won't have to fumble with a USB cable while driving. Many models also feature clamping jaws that securely hold your phone in place, keeping it charged and easily accessible without the risk of it falling overboard.

However, not all wireless charging systems use clamps — some feature storage cubbies, while others have a borderless design. Wireless charging technologies also vary, meaning the wrong charger may charge your device slowly, fail to charge it altogether, or even cause it to overheat.

How Does Wireless Charging Work — and Why Compatibility Matters

There are two things many people misunderstand about wireless chargers: where they get their power and how they work. The truth is, they do not draw power from thin air, nor is the technology behind them particularly futuristic.

Although manufacturers often make wireless charging sound like a new "invention", it is simply based on electromagnetic induction. Faraday discovered electromagnetic induction — the principle that a magnetic field can generate an electric current — in 1831. Later, in the 1890s, Tesla demonstrated that electricity could be transmitted wirelessly by tuning circuits to the same electrical frequency.

Using these principles, wireless chargers are able to transfer energy invisibly to your phone through electromagnetism and electromagnetic induction.

• Electromagnetism: When you connect a wireless charger to a power source, its transmitter coil becomes energised and generates a magnetic field around it.
• Electromagnetic induction: When this magnetic field reaches the receiver coil inside your mobile device, it induces electrons to flow, generating electrical energy.

Therefore, for wireless charging to work, you need a wireless charger with a transmitter coil and a phone with a receiver coil. The transmitter and receiver coils must be designed to the same standard; otherwise, charging may not function properly.

Different wireless charging standards have different power profiles, magnetic field ranges, operating frequencies, thermal characteristics, and other performance parameters. For example, the Qi wireless charging standard used by most smartphones operates at approximately 85–360 kHz and supports an electromagnetic range of up to 4 mm. By comparison, NFC charging operates at 13.56 MHz with a range of up to 20 mm.

What to Look for in a 12V/24V Wireless Phone Charger

As mentioned earlier, an incompatible wireless charging technology may charge your phone slowly, fail to charge it, or cause excessive heat buildup. Even if the charger and phone are compatible, shortcomings in other areas can still result in a poor charging experience.

So, let's quickly go through everything you should consider before choosing a wireless charger for your setup.

Your charging needs

Like with any other system, the very first step in choosing a wireless charger for your van or boat is identifying your needs. Consider the three Ws: Why, Where, and What.

• Why — Why do you need a wireless charger? Do you want to eliminate charging cables, charge your phone while using it for navigation, or keep it charged while stowed away?
• Where — Where do you want to install the charger? The cockpit area, living space, or sleeping area?
• What — What do you want to charge wirelessly? Obviously, it's a phone, but what's its make, size, battery capacity, et cetera.

Design type: pocket, active-grip or open-surface

Once you have determined your wireless charging needs, consider the functionality you want on your charger. The three main designs available are:

• Wireless charging pockets — These chargers feature a built-in storage compartment that charges your phone while keeping it out of sight. For example, the Cove 3 Coil 15W Wireless Charger incorporates an open-front storage cubby.
• Active-grip wireless chargers — These chargers include a mechanical clamping system that securely holds your phone while it charges. A good example is the popular ROKK Edge 10W Wireless Phone Charging Mount.
• Open-surface wireless chargers — These are the simplest wireless chargers, featuring neither clamping jaws nor a storage compartment. Take the Treklo Tri-Coil 15W Wireless Charger Pad, for instance. It has a flat charging area that accommodates phones of various sizes.

Physical dimensions

Regardless of which type of wireless charger you choose, ensure it fits your intended mounting location. The mounting footprint must be small enough to allow all mounting points to be secured properly. Then, there should be sufficient clearance around the charger to allow easy docking and undocking of the phone.

Phone-size compatibility

In addition to space requirements, your new wireless charger should accommodate all the phones you intend to charge. This is important because some chargers are designed primarily for smaller phones, while others can securely hold and charge larger devices.

Input electrical rating

What is the voltage of the leisure battery or starter battery that will power your wireless charging system? Different chargers support different input voltage ranges, so you must ensure the model you choose is compatible with your boat's or adventure vehicle's electrical system.

Surface-mounted vs recessed installation

Choose a wireless charger with a mounting style that suits both your preferences and your camper's layout. This is a critical consideration, as wireless chargers are available in either surface-mounted or recessed-mounted designs.

• Surface-mounted wireless chargers — These mount directly onto the surface, leaving the entire unit exposed. Installation typically requires a wiring hole and small pilot holes for mounting screws.
• Recessed-mounted wireless chargers — These mount within a cut-out cavity in the surface, leaving only the front face visible. As a result, installation requires slightly more effort and tools, such as a hole saw — as with our 12V Pop-Up Wireless Phone Charger — and, in some cases, a jigsaw.

Qi and other wireless charging standards

As mentioned earlier, effective wireless charging requires compatibility between the transmitter coil in the charger and the receiver coil in your phone. Therefore, you should confirm your phone's wireless charging technology before purchasing a charger.

Qi wireless charging is currently the most widely used standard and is supported by both iPhones and Android devices. However, it is still worth confirming whether your phone supports the original Qi standard or the newer Qi2 (MagSafe-compatible) protocol for the best charging experience.

Charging speed

The last thing you want is to leave your phone charging overnight only to find it has gained just 10% battery after eight hours. To avoid this, choose a wireless charger that can deliver sufficient power to your device. Charging performance is often expressed as output power in watts (W).

For example, a 10W ROKK wireless charger can charge a Samsung phone from 1% to 100% in approximately 2.5 to 3 hours, depending on whether the device has a 4,000mAh or 5,000mAh battery. By comparison, a 5W charger could take 4 to 5 hours to achieve a full charge.

Note: iPhone users can expect longer charging times because iOS limits wireless charging on Qi to 7.5W.

The chart below highlights the charging power of our currently available wireless chargers.

Charging efficiency and standby power draw

You should consider charging efficiency carefully, especially when relying on off-grid power systems. The first step is ensuring the charger is designed to work efficiently with your phone's wireless charging coil. Otherwise, incompatibilities can lead to excessive energy losses through electromagnetic induction and heat generation.

Secondly, make sure the charger has a low standby power draw. A charger with high standby consumption can waste a significant amount of energy even when it is not actively charging a device. This is particularly important in caravans, campervans, motorhomes, and boats, where every watt of stored power matters.

Ease of use

Most wireless chargers on the market are straightforward to use, so this is rarely a major concern. The main feature we recommend is ensuring the charger allows quick docking and undocking of your phone for those moments when your full attention is needed elsewhere.

For example, a one-handed-operation wireless charger allows you to dock or remove your phone with one hand while keeping the other on the wheel.

Construction and durability

One consistent requirement for accessories used in caravans, campervans, RVs, and boats is the ability to withstand impacts and vibrations. Therefore, choose a wireless charger made from durable materials that won't crack or shatter from minor knocks or movement.

The warranty period is a useful indicator of build quality — the longer the warranty, the greater the manufacturer's confidence in the product.

Environmental protection

In addition to a robust build, it's wise to choose a wireless charging system that can withstand environmental exposure. This is especially important if the charger will be mounted in an exposed location, such as a boat's helm station.

Some of the most important environmental protection features to consider include waterproofing, UV resistance, corrosion resistance, and thermal resistance.

Pricing and value

Lastly, make sure the wireless charger you're buying for your van, motorhome, or boat is worth your money. Compare the listed price against its features and capabilities to ensure you're not paying more for less.

DIY vs Professional Installation

While there may be others, these are the most important factors to keep in mind when choosing a wireless charger for your caravan, campervan, RV, motorhome, or boat.

At Campervan Builders, we strive to provide all of this information in our product listings to make your shopping experience as smooth as possible. If a product you're interested in appears to be missing key details, feel free to contact us and we'll be happy to help.

As for installation, all of our wireless phone chargers operate on 12V or 24V DC systems, meaning you can DIY-install them without compliance concerns. You just need to follow basic wiring practices, including using appropriately sized cables and fuses to ensure safe and reliable performance.

If you're not comfortable working with electrical wiring or tools, hire a qualified electrician to install the system.

Frequently Asked Questions

How does a wireless phone charger work?

Wireless chargers are based on electromagnetic induction. The charger's transmitter coil generates a magnetic field, and when that field reaches the receiver coil inside your phone, it induces electrons to flow, generating electrical energy. Both coils must be designed to the same standard for charging to work properly.

How long does a 10W wireless charger take to charge a phone?

A 10W ROKK wireless charger can charge a Samsung phone from 1% to 100% in approximately 2.5 to 3 hours, depending on whether the device has a 4,000mAh or 5,000mAh battery. A 5W charger could take 4 to 5 hours, and iPhone users can expect longer times because iOS limits wireless charging on Qi to 7.5W.

Can I install a 12V wireless charger in my van myself?

Yes. All of our wireless phone chargers operate on 12V or 24V DC systems, meaning you can DIY-install them without compliance concerns — just follow basic wiring practices, including appropriately sized cables and fuses. If you're not comfortable with electrical wiring, hire a qualified electrician.

What wireless charging standard should my phone support?

Qi wireless charging is currently the most widely used standard and is supported by both iPhones and Android devices. It's worth confirming whether your phone supports the original Qi standard or the newer Qi2 (MagSafe-compatible) protocol for the best charging experience.

Ready to keep your phone charged on every trip? Explore our full range of 12V/24V wireless chargers for caravans, campervans, motorhomes, and boats.