BLUETTI D40 DC-DC Battery Charger

Name: BLUETTI D40 DC-DC Battery Charger
Brand: Bluetti
SKU: A-BM-D40-UF-O9V15V4
Price: 199.0 USD
Availability: InStock

by Bluetti

SKU: A-BM-D40-UF-O9V15V4

$199.00

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BLUETTI D40 DC-DC Battery Charger Enhance Your Power Flexibility and Reliability

Are you tired of limited power sources during your camping, RV, or marine adventures? The BLUETTI D40 DC-DC Battery Charger is your ultimate solution to expanding your energy independence with seamless, efficient, and safe charging capabilities. Designed to perfectly complement the BLUETTI AC200L power station, this compact yet powerful charger ensures you stay powered up wherever your journey takes you.

The BLUETTI D40 DC-DC Battery Charger is engineered to provide effortless and reliable charging for your 12V batteries, including lithium iron phosphate (LiFePO₄), AGM, gel, lead-acid, and calcium types. Whether you're in an RV, on a boat, or off-grid in nature, this device is built to meet your diverse power needs. Its plug-and-play design makes installation straightforward—no complicated setup, just connect and start charging.

Don’t let limited power sources hold you back. The BLUETTI D40 DC-DC Battery Charger is the perfect addition to your mobile and off-grid power setup. Whether you're enhancing your RV's energy system, maintaining your marine batteries, or preparing for emergency power, the D40 delivers dependable, efficient charging with peace of mind.

BLUETTI D40 DC-DC Battery Charger Features

Universal Battery Compatibility for All Types

Supports LiFePO₄, AGM, gel, lead-acid, and calcium batteries, making it perfect for any RV, boat, or off-grid project. Easily charge your different batteries with one reliable device, saving time and money.

Fast and Efficient Charging Power

With a maximum output of 400W and 12V / 30A current, the D40 quickly charges your batteries. It saves time and ensures your power system is ready for use, even during long trips or off-grid adventures.

Safe Operation with Advanced Protections

Built with modern safety features like overcurrent, overvoltage, and reverse polarity protection. These ensure your batteries and devices stay safe while charging, giving you peace of mind during all your outdoor activities.

Easy Plug-and-Play Installation

Designed for simple setup, just connect the D40 to your power sources and batteries. No complicated wiring needed. It’s quick, easy to use, and perfect for anyone wanting reliable power without technical hassle.

Versatile Power Sources for Flexibility

Charge from multiple sources including your AC200L, solar panels, or vehicle starter batteries. This flexibility means you can generate power from solar, mains, or your vehicle, keeping your batteries charged anywhere.

Compact and Durable Design

Small and sturdy, the D40 fits easily into tight spaces and withstands outdoor conditions. Its rugged build makes it suitable for camping, boating, or RV use, so you can trust it in all outdoor environments.

Real-Time Power Monitoring and Control

Clear LED indicators show charging status and system health. User-friendly controls let you manage your power easily. Keep informed about your batteries and ensure optimal use with just a glance.

BLUETTI D40 DC Warranty

BLUETTI provides a 1-year limited warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.

What's Included

1 x BLUETTI D40 DC-DC Battery Charger

BLUETTI D40 DC-DC Battery Charger Specifications
Charging Power	400 W
Weight	Approx. 2 kg / 4.4 lbs
Dimensions (L × W × H)	232.7 mm × 180.7 mm × 69.2 mm / 9.2 in × 7.1 in × 2.7 in
Working Temperature	-20°C to 45°C / -4°F to 113°F
Storage Temperature	-20°C to 50°C / -4°F to 122°F
Working Humidity	10% to 90%
Noise	43 dB Max
Working Altitude	Up to 2,000 m / 6,561 ft
Protection Grade	IP20
Current	30A Max.; 20A Max. (AC200L and other BLUETTI portable power stations)
Voltage	Lead-acid: 14.4V Max.LiFePO₄: 14.4V Max.AGM / Gel: 14.7V Max.Calcium: 15.4V Max.
Load Mode	12V / 20A (AC200L and other BLUETTI portable power stations)
48V DC	45V to 60VDC
PV / Starter Battery	12V to 36VDC, 20A Max.

BLUETTI D40 DC-DC Battery Charger Manual

This is my second Delta Pro Ultra! Bought to expand our home backup. Both units are connected to the Smart Home Panel 2

Best Price In Town

I do lots of research and Outbound Power had the best deal on what I needed. Surprise surprise. It shipped from the same warehouse as the manufacturer and the warranty works exactly the same. Glad to have found the site.

Hi RG,
Thank you for the kind words! We’re glad your research led you to us and that everything worked out as expected—from pricing to shipping to warranty coverage. We truly appreciate your support and hope you enjoy your new battery pack.

Works perfect!

Hi Philip,
Thank you for sharing — we’re glad to hear the Alternator Charger is working perfectly for you! We truly appreciate your support and hope it continues to serve you well.

Best,
Bill

Ecoflow Wave 3 purchase

I can honestly say Outboundpower Company exceeds their mission statement. The word that defines this organization is "Outstanding". The the Quality of products they sell is Outstanding. Their recent price matching is Outstanding by exceeding my expectations and truly customer focused. They really make a difference; a refreshing find these days. Their customers are definitely the most important part and purpose of their work.

In closing, I seldom offer reviews even when asked. However, I was motivated to expend the time and effort to recommend OutBoundPower without reservation; because they truly earned my respect. R. Kaiser

Thank you so much for your incredible review. We’re truly honored by your words. Our entire team works hard to deliver exactly the experience you described, and hearing that we exceeded your expectations means the world to us.

Price beating, product quality, and personal support are core parts of our mission, and it’s deeply gratifying to know they made a real difference for you. Reviews like yours remind us why we do what we do.

Thank you for taking the time to share your experience. Your trust and recommendation are sincerely appreciated. If there’s ever anything more we can do to be of service, we’re here and ready to help.

— Bill & the Outbound Power Team

Perfect

Perfect for what I needed it for.

Hi Stephen,

Really appreciate the great review — we’re thrilled the DELTA 3 Max was the perfect fit for your needs! Thanks for choosing Outbound Power.

If you ever have questions or want to expand your setup down the road, we’re always here for you.

Anker Solix C2000 gen 2 = GAME CHANGER

Just completed a 5 day hunting trip with my new Anker Solix C2000 gen 2 and I am so happy I pulled the trigger on this purchase! I ran all camper lights, fan and charged all of my various electronics (phone, iPad, camera batteries, hand warmers, etc…..) The power station was so much easier and more convenient than my generator. I intentionally used lights and things more than normal to test battery and only charged it once during the trip. I ordered the combo with the extra battery pack but did not receive the extra battery before my trip. Didn’t need it and don’t think I will need it on my hunting trips unless I decide to run an electric heater. Also got some use out of the power station at home today. We ran out of room to cook everything in the kitchen for our thanksgiving meal so I just hooked up our deep fryer to the power station and problem solved! 😁 Love the C2000 so far, excited to try to use it with a solar panel soon.

Thank you for taking the time to leave such a terrific review of your experience with the SOLIX C2000 Gen 2. We are so glad to hear that it was so helpful during your recent hunting trip. We apologize for the delay with the extra battery, but we are happy to hear that it wasn't needed on your trip. We hope you continue to find many uses for the C2000, whether it's on your hunting trips or at home for special occasions like Thanksgiving. We appreciate you!

Best Customer Service!

Thank you for your great website and customer service. I ordered an item that didn’t meet my specific situation, so requested a return. OP responded promptly with their approval and a return shipping label. Ordered another item that met my needs and it was shipped within a week. Great job guys!

Hi Big El,

Really appreciate the awesome 5-star review! Glad we could jump on the return quickly and get you the exact setup you needed. That’s how we like to do things—fast, friendly, and zero hassle.

Thanks again for rolling with Outbound Power. If you need anything at all, we’ve got your back!

Love it

Box was banged up , but no damage due to a well packaged product.
Delivered with 30% battery,
charged it up, tried a couple of outlets, and good to go !
Note: the 400w solar panel is way larger, and heavier, than I expected! Probably because I have a smaller one ,but don't know the wattage.
I still have trouble using the solar panel bag as a stand, but it'll be fine.

Hi Joseph,

Thank you for the 5-star review! We’re thrilled to hear you’re enjoying your EcoFlow DELTA 3 Ultra. It’s an incredibly capable unit, and we’re glad it’s meeting your expectations.

If you ever have questions about setup, accessories, or expanding your system, we’re always here to help.

Thanks again for choosing Outbound Power!

EcoFlow Dual Fuel 3200W/4000W Smart Generator 4000

Hi James,

Thank you so much for the 5-star review! We’re thrilled to hear you’re happy with your EcoFlow Dual Fuel Smart Generator 4000. It’s a powerful, reliable unit — a great addition to any backup or off-grid setup.

If you ever need help, have questions, or want to explore ways to expand your system, we’re always here for you.

Another Great Experience!

I have purchased over $20,000 of solar equipment from Outbound Power over several purchases. They have the best pricing and the best hands-on customer service. I always shop other sites but always end up back at Outbound Power. They are awesome!

Thank you, Richard! We’re truly grateful for your continued trust and for choosing Outbound Power for your home energy needs. It means a lot to us that you return each time after comparing options — our goal is always to offer the best prices and the most helpful, hands-on support. We appreciate you and look forward to assisting with your next project!