





40A 12v DC DC Charger MPPT Solar Battery to Battery Smart Charge Relay Camper UK
40A 12v DC DC Charger with MPPT Solar Battery to Battery Smart Charge Relay APXDC40A
- Intelligent 40A DC-DC Charger with MPPT Solar Management
- Suitable for all Standard Lead Acid, Gel, AGM, Calcium and LiFePo4 Batteries.
- Suitable for battery setups between 50AH to 1200AH
- Our 3 stage smart charging DC-DC Chargers take power from the factory alternator and charge up leisure batteries in your RV, Caravan, Motorhome, Boat, 4×4 and more. A DC-DC Charger is a must have for all modern vehicles that use a smart alternator as they require sensitive electronics to efficiently and safely charge batteries. Our DC-DC Charger is super simple to use and setup display. Plug in the cables and select the battery type and you’re ready to go.
- Our DC-DC Charger is capable of outputting up to 40A in to your leisure battery. Meaning a standard 80Ah battery can be charged from empty to 100% in around 2 hours! The built-in BMS protection for lithium batteries means that it won’t charge unless the correct conditions are met like temperature and voltage.
The built-in solar MPPT systems allows for solar panel connection, meaning your batteries stay charged while parked up or at camp. Never wake up to a flat battery again with our smart 40A DC-DC Battery charger.
Features:
- Input/output reverse polarity protection
- Input/ output over-voltage protection
- Over temperature protection
- Over-charge protection
- BMS protection for Lithium Battery
- 3 stage charging to maximise the lifespan of your batteries
Specs:
Max Charging Current: 40A
Solar Input Voltage: 9-32 Volts
Solar Input Capacity: 600 Watts
Vehicle Input Voltage (From Vehicle Alternator/ Battery): 12.5-15.4 Volts (Should be between 14.4-15.4V)
Recommended Fuse Size: 40 Amps
Standby Consumption: Less than 10 mA
Operating Temperature: -20 to +50 oC
Charge Type: 3 Stage
FREE DELIVERY INCLUDED - Or collect from Apex4WD Ltd, SG5 4NZ
APXDC40A
Pairs well with
Dispatch Within 1-2 business days.
UK Based Customer Service
Over 3000+ 5 Star Reviews
Collect From Apex4WD Warehouse

40A 12v DC DC Charger MPPT Solar Battery to Battery Smart Charge Relay Camper UK
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Orders are dispatched within 1-2 business days. Items are usually sent with next day courier services (DHL, FedEx, Royal Mail) - Next day service is not guaranteed, but we try our best. - Larger items like bumpers, canopies, roof racks, awnings etc.. Are sent with a specialist large item courier and can take 3-5 business days for delivery.
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Customer Support
Not sure what you need? Want some advice? After sales support? Our friendly team of 4x4 and camping experts are here for you! Drop us a contact form with your order number or product SKU and we would be happy to help.
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FAQ’s
We try our best to answer any of your questions upfront. Listings should contain all the information you need.
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Contact Us
Still can't find the answer to your question? That's ok. We can help. The best way to contact us is via email: sales@apex4wd.co.uk
Delivery & Collection Information
UK Mainland Delivery ONLY — Contact us for delivery options outside this area. - Scotland, N.Ireland, Channel Islands & Isles Incur Extra Delivery Fees.
Next Day Delivery On All Small Items
Large Items Require Specialist Delivery - Oversized packages can take 3-5 working days as standard. We do offer express next day delivery as an option; get in contact with us to learn more.

Family Values, Big Service, Huge Value
At Apex4WD, we're more than a 4x4 and camping retailer; we're part of the community. Built around our shared passion for off-roading, overlanding and outdoor pursuits; we're here to help more people experience the adventures we love.
From winches and hard top canopies to roof tents and camping accessories, we offer quality 4x4 parts and outdoor gear at fair, affordable prices. Because we believe your money should go towards your next adventure, not unnecessary mark-ups.
Our family, friends and customers are at the heart of everything we do. As we grow, we're committed to supporting the UK 4x4 and overlanding community, giving back and making the outdoors more accessible for everyone.
Apex4WD - built around adventure, driven by community.
UK Based Warehouse Stock
All information and photos are for general guidance only and the parts you receive may vary depending on your specific application. Whilst we go to every effort to show the correct part in the photos, this is not always possible. Sometimes, other parts may be visible which are not included in the price.
FAQs
Please read our FAQs page to find out more.
How can I pay?
Ordering on our website is the best and easiest way to buy products. Orders are processed automatically and dispatched directly to your delivery address.
We also offer collection from our warehouse in Bedfordshire, where you can pay Cash, Card or Bank Transfer.
We can also setup orders directly via invoice for business customers.
How long will it take to receive my order?
UK MAINLAND:
For items that are in stock and ready for dispatch; usually next day! (If ordered before 10am)
Some items are subject to more complex handling and oversized deliveries; such as winch bumpers and canopies - these can take 3-5 days for standard delivery.
Scottish Highlands, Northern Ireland, Isles and Channel Islands:
Slightly longer than standard UK delivery. Usually only 2-3 days on top of standard delivery.
International Orders:
EU customers can see delivery times on average of 5-10 days.
The rest of the world sees delivery times vary largely on locations. But on average, can see times of 10-20 days.
If you are in doubt, or on a time limit; please message us.
How can I find my tracking number?
You will receive an email with your order confirmation upon ordering. Once dispatched, you will also receive a dispatch email with a tracking number with the chosen courier. - Tracking numbers can also be found under your "Order History" on your account.
Can I return my item?
Yes! We offer a 14 day, no questions asked, returns policy.






