Top 8 DC to DC Charger UK – Car Battery Charging Units

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1. Victron Energy


Victron Orion Smart 30A 12V DC to DC charger with Bluetooth connectivity

Victron Energy #ad - Perfect for solar charging systems with a high solar input, where a capable dual battery solar charge controller is expensive or difficult to procure or perfect for charging a 12V leisure battery system from the vehicle alternator depending on target battery for battery to battery charging.

Multi-stage intelligent charging program protects both batteries, allowing for unattended automatic charging. Charged by solar / battery bank from another 12V battery / mains/ alternator. E. G. Can take power from an starter battery to charge a leisure or auxiliary battery. Scroll down to Product Details for more information.

Intelligent battery-to-battery charger, designed to automatically charge one 12V battery / battery bank with its own energy source e. G. Bluetooth connectivity lets the charging be monitored and settings adjusted from the Victron Connect mobile app. Can be easily integrated or retrofitted into any 12V system, allowing the user to transform a single battery system into a dual battery charging system.
BrandVictron Energy #ad
ManufacturerVictron #ad
Height8 cm (3.15 Inches)
Length13 cm (5.12 Inches)
Weight1.8 kg (3.97 Pounds)
Width18.6 cm (7.32 Inches)
Part NumberVOS1212-30NI

2. Ring


Black, Ring rscdc30 Charger 12 V, 30 A to DC

Ring #ad - 3 stage smart charge output to optimize battery charging performance. Programmable for most types of batteries. It can also act as a solar controller, providing a series controlled power supply of solar panels up to a maximum of 360 watts. Particularly suitable for use on commercial vehicles, vans, caravans and boats where electricity is required away from the civil network.
BrandRing #ad
ManufacturerRing Automotive Limited #ad
Height21.25 cm (8.37 Inches)
Length25.84 cm (10.17 Inches)
Weight1.27 kg (2.8 Pounds)
Width12.24 cm (4.82 Inches)
Part NumberRSCDC30

3. Optimate


OptiMate TM-500 DC To DC 12V Motorcycle Automatic Battery Charger Optimizer

Optimate #ad - Input: 12-16 v, 2. 7a max,. Weatherproof battery lead, standard battery clip set & fused battery clip set included. Charge your 12v battery from another 12v battery! no ac power required!recharge your trailered motorcycle, ATV or speed boat’s battery on the way to the venue! Save: low volt start of 1v; charGING AMPS: 2A. Model tm-500 ideal for: std, agm & gel 12v batteries from 3 – 96Ah. Use: indoor / -20°c; style: weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 6ft / outdoor  lowest temperature: -4°F / 180cm charge lead ending in SAE connector.
BrandOptimate #ad
ManufacturerOptiMate #ad
Height6.5 cm (2.56 Inches)
Length16.7 cm (6.57 Inches)
Weight0.6 kg (1.32 Pounds)
Width4.6 cm (1.81 Inches)
Part NumberTM-500
Warranty3 Year limited warranty



CTEK 4mtr D250SE 12V 20AMp Dual DC-DC Battery to Battery Charger Kit with 70amp 10mm² Cable D250SA/K4

CTEK #ad - Solar mPPT. Ctek d250se battery to Battery Charger. 12v 20amp dc/dC Charging. Suitable for all vehicles including Euro 5 & Euro 6 with smart Alternators.
BrandCTEK #ad
ManufacturerSimply Split Charge #ad
Height15 cm (5.91 Inches)
Length3 cm (1.18 Inches)
Width0.4 cm (0.16 Inches)
Part NumberD250SE

5. Sealey


Sealey DCBC30 30A 12V DC to DC Battery Charger

Sealey #ad - Can be used in conjunction with a solar panel when the vehicle is switched off. 2 year guarantee. Protected against short circuits, output reverse polarity, over charging, open circuits, over current and overheating. Dc to dc battery charger ideal for charging an auxiliary battery in vehicles such as camper vans and caravans. Will charge your second battery whilst driving and will be linked to the ignition switch to avoid draining your main battery. Rated at iP65 water resistance. Suitable for 12v gel, agM, Calcium and conventional Lead Acid batteries.
BrandSealey #ad
ManufacturerSealey #ad
Part NumberDCBC30
Warranty1 Year

6. ciciglow


Automatic Charging, On-Board Battery Charger for Flooded, Solar Controller, 12V 30A DC to DC Battery Charger, Multi-Stage Charging

ciciglow #ad - App connection: an external bt module not included can be connected, and mobile APP can be connected to the charger to display various charging parameters, historical data and fault information in real time.

Multiple protection: the automatic battery charger has overheat, overvoltage, short circuit and wrong connection protection to ensure safe and reliable operation. Automatic charging: in order to continuously charge the battery, the controller can always connect the car battery. Automatic wakeup: when the lithium battery BMS is protected for some reason, the controller charger can automatically wake up the BMS and continue to charge the lithium battery.

Main purposes: car dc to dc charger can charge the main living battery through the car generator and starting battery, or the main battery can be charged by the solar panel some models. When the charging energy stops, the battery will not discharge in reverse direction.
Brandciciglow #ad
Manufacturerciciglow #ad
Part Numberciciglowsgtbvoa43w

7. Renogy


Yachts, Cars, Boats, Renogy 12V 50A DC-DC On-board Battery Charger with MPPT for Gel, and Lithium Batteries Using Multi-Stage Charging, AGM, in RVs, Recommended to Match with 60A ANL Fuse

Renogy #ad - Compatible with multiple deep cycle battery types: AGM, and Lithium. Recommended to match with 60a anl Fuse: The Renogy ANL fuse will protect your controller, and battery from overcurrent. Multi-input for battery chargingrenogy dc-dc on-board battery charger is designed to charge service batteries from a starting battery linked to an alternator, GEL, or by utilizing solar panels connected directly to the unit, Flooded, offering multiple charging options and ensuring your battery stay fully charged.

Multiple protections renogy dc-dc on-board battery charger has multiple intelligent protections includes battery isolation, battery temperature protection, reverse current protection, overheat protection, over-voltage protection, solar panel and alternator reverse polarity protection, over-current protection, guaranteeing charging safety and protecting you batteries.33-phase mppt charging technology with built-in maximum power point tracking mppt, providing 3-phase charging Bulk, renogy dc-dc On-Board Battery Charger will charge your service batteries with maximized solar power, Boost and Float to regulate the whole charging and ensure the batteries will be accurately charged at the correct voltage levels to 100%.

Light & small, 5. 7in in height, renogy dc-dc on-board battery charger is ready to be installed and adapt to any tiny narrow installation space, and 3. 13lbs in weight, Ready to be Set UpWith only 9. 6in in length, resolving your concern from limited room in you vehicle. Rj45 communication port featured bluetooth monitoring ready! exclusively available with the bt-2 bluetooth module accessory and Renogy DC Home App available on the IOS and Google Play Stores, wire, you can monitor this device remotely and simply through your phone and stay constantly updated.
BrandRenogy #ad
ManufacturerRenogy #ad
Height24.4 cm (9.61 Inches)
Length7.7 cm (3.03 Inches)
Weight1.42 kg (3.13 Pounds)
Width14.6 cm (5.75 Inches)
Part NumberRBC50D1S

8. KFD


KFD DC to DC 12V-24V Vehicle Charger Car Cigarette Lighter Adapter for ResMed AirSense 10 Autoset/Autoset for HER/AirSense S10 Elite/AirSense 10 CPAP BiPAP Machine Car Charger DC 24V 3.75A

KFD #ad - Note: this charger does not work for Resmed S9 series, which needs a 3pin connector. Input: dc 12v/24v used on all kind of vehicles; output: dc 24v 3. 75a | charging cable is 3 meters=9. 85 feet // passed ce fcc rosh EN50498 certification. Resmed airsense 10 autoset/autoset for her/airsense 10 elite/AirSense 10 CPAP BiPAP Machine/ ResMed S10 CPAP.
BrandKFD #ad
ManufacturerKFD #ad
Part NumberDPT-1148-UK