SKU: 51141611225

Mastervolt Isolated DC Master DC-DC Converter (24V In / 12V 3A Out)

Sale price$93.21 Regular price$103.57
Save 10%

Pay in installments of $25.89 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 29 - Sep 3

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Mastervolt Isolated DC Master DC-DC Converter (24V In / 12V 3A Out)The Mastervolt DC Master is a DC DC charger which is designed to provide quick and safe charge to the service battery, providing stabilised voltage to protect the battery and the equipment it powers. This is an isolated model which has galvanic protection between the input and the output, as well as interference supression for sensitive equipment. Traditionally, a service battery is linked to the starter battery via a charge relay. The starter battery

The Mastervolt DC Master is a DC-DC charger which is designed to provide quick and safe charge to the service battery, providing stabilised voltage to protect the battery and the equipment it powers. This is an isolated model which has galvanic protection between the input and the output, as well as interference supression for sensitive equipment.

Traditionally, a service battery is linked to the starter battery via a charge relay. The starter battery will be located near to the alternator and receives most of the charge current. However the service battery is usually further away. The long cables used to connect it up cause a voltage drop, leading to slower charging, which can result in failing appliances and premature failure of the battery.

Modern, fuel efficient engines are equipped with smart alternators, following regulations such as Euro 5 and Euro 6. Instead of a constant output, smart alternators provide a variable voltage; after a brief charging period, voltage is reduced and the charging stops. Furthermore, the energy produced by regenerative braking leads to voltage peaks. Service batteries coupled in the traditional way will receive hardly any charge and may be damaged by these peak voltages.

To solve these issues, Mastervolt offers the DC Master chargers, which monitors the service battery and compensates the voltage loss. There is no fan so operation of the charger is silent and these units also have 2 minutes of extra capacity, perfect for if you need a quick power boost. The DC Master unit is supplied complete with mounting bracket, screws and fasteners.

General specifications

o Nominal output voltage : 13.6 V

Max. output power: 82 W

Nominal output power: 41 W

Max. output current (for 2 min. intervals): 6 A

Continuous output current: 3 A

Nominal input voltage: 24 V

Input voltage range (max.): 20-32 V DC (35 V)

Galvanic isolation: yes

Stabilised: yes

Dimensions, hxwxd: 89 x 87 x 50 mm (3.5 x 3.4 x 2.0 inch)

Weight: 0.29 kg (0.6 lb)

Compliance: CE, E-mark 

Technical specifications

DC consumption: < 15 mA

Connections: fast-on

Temperature range (ambient temp.): -25 °C to 80 °C, derating > 30 °C (-13 °F to 176 °F)

Cooling: natural cooling

Protection degree: IP53

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 51141611225

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 17 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Susan Thompson
Louisville, US
★★★★★ 5
Great Buy
Color: Gold
Very heavy duty! Also classy and matches my gold faucet perfectly. Great value!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
A
Amazon Customer
Birmingham, US
★★★★★ 4
Feels like a real upgrade, but maybe priced a little high
Color: Stainless Steel
This is one of those things you don’t think much about until you switch to a better one. Right away you notice the weight. It actually stays put when you pull a sheet instead of sliding all over the counter or tipping up, which already makes it better than most cheap holders. The spring arm does help keep the roll under control so you’re not pulling half the roll by accident. One handed use works most of the time, but it depends on the paper towels. Thinner rolls tear clean without any effort. Thicker ones can still need a second hand here and there, so it’s not perfect but still better than a basic stand. Build quality feels solid. The finish looks clean and not cheap, and it wipes down easily. It definitely looks like something you’d keep out on the counter instead of hiding. Only real downside is the price. It does what it’s supposed to do and does it well, but it’s still a paper towel holder at the end of the day. You’re paying for the weight and design more than anything. If you’re tired of flimsy ones, this is a noticeable step up. Just depends if you care enough to spend extra on something this simple.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
L
LovelyHaze♡Peace & Love
Louisville, US
★★★★★ 5
Sleek Kitchen Essential One Handed Paper Towel Dispenser
Color: Black, Color: Black
​The Ultrean paper towel holder is a countertop accessory designed for convenience featuring a sturdy stainless steel construction that wipes clean easily and blends into any kitchen or bathroom decor. It stands upright on a weighted non slip base that provides stability during use and it is equipped with a spring loaded arm intended to assist with one handed tearing. The assembly is very straightforward making it quick to set up right out of the box so you can start using it immediately for your daily cleaning tasks. ​I found this holder very easy to put together and integrate into my space and it definitely adds a nice modern touch to my kitchen counters. While it is marketed as a one handed tear dispenser I have noticed that it depends on the type of paper towels you are using. If I am using thinner cheaper rolls the tear is effortless but with my preferred thick Bounty paper towels the tension is not always enough to tear them off cleanly with just one hand so I usually end up holding it down to get a clean rip. ​The major pros of this dispenser are the weighted non slip base that keeps it from sliding around and the stainless steel finish that makes maintenance simple with just a quick wipe. The main con is that it struggles with heavy duty paper towels often requiring two hands to tear without tipping or pulling the whole roll which might be frustrating if you are expecting a true one handed experience every single time. Still it is a functional and attractive piece that keeps my kitchen organized and as long as you do not mind using both hands for the thicker brands it is a solid addition to any home.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
B
Billy
Lake Worth, US
★★★★★ 5
A Paper Towel Holder That Actually Holds Its Own
Color: Gold
This is a lot nicer than I expected for something as boring as a paper towel holder. The base has some real weight to it, so it doesn’t slide around every time you try to tear off a sheet. The spring-loaded arm also helps keep the roll from spinning freely. The gold finish looks good in person. It leans a little more bronze/brassy than bright gold, which my wife prefers in our darker colored kitchen. It feels sturdy, wipes clean easily, and doesn’t look cheap sitting on the counter. The one-handed tearing works pretty well, though it may depend on the paper towels you use. Thinner rolls tear off easily. With thicker paper towels, you may still need a second hand here and there to get a clean rip. We use the Costco branded Kirkland paper towel rolls and haven't had any issues getting just one sheet. I am guilty of yanking at our old paper towel with one hand roll to try and rip off a single sheet. My success rate has significantly increased since we started using this paper towel holder. It’s definitely more expensive than a basic paper towel holder, but it also feels like a clear upgrade from the cheap flimsy ones. Would I normally buy this? Probably not, but if I am splurging on kitchen upgrades, then I'd definitely have this on my list.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
E
Eva
Dallas, US
★★★★★ 5
Pretty gold tone color and works well
Color: Gold
This is great for lazy people like myself. Just pull back the grabber hand and drop the paper towels in, no unscrewing anything or fiddling around, I only want to spend one second installing my paper towels and this lets me do that. The gold tone works well with my decor, it has a very finely brushed gold tone metal finish trending into brass color tones that looks better in person than in the listing. Overall it looks very high end. The bottom is very heavily weighted, paper towels slip right on, and removing a towel with one hand is a snap. The grabber hand keeps the towels in place. On the bottom are 4 very effective grabby strips that keep the unit from sliding. The whole unit weighs 3 pounds but somehow it seems like it's a lot more. Checking over the listing, it looks accurate other than some of the photos make it look a little less golden than it really is. This thing is so nice. I was going to use this at work but it might be too nice looking for an industrial environment so I'll probably just use it at home instead. The downsides on this are there were a few super tiny scratches that you'd really have to squint to see. You probably would not notice but still not ideal. The other obvious issue is these are currently priced at $50. Looking around at other options, I don't see many with all the features of this unit including upscaled finish, smoothly operating grabby hand, and heavily weighted bottom but certainly there are many other towel holder options that get good reviews for less money so I would not say this unit is the best economic bang for the buck. However if you really don't care about an extra $20 or you would really like an upscale nice brushed gold/brass finish, then it might be well worth it for you because this does work really well and I am very much enjoying it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026

recommand products