SKU: 35058392249

Mastervolt Non Isolated DC Master DC-DC Converter (48V In / 12V 20A Out)

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Description

Mastervolt Non Isolated DC Master DC-DC Converter (48V In / 12V 20A 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 a non isolated model which has an electrical connection between the input and the output, making it suitable to applications with negative earthing. It is also compact and efficient, with low heat generation. Traditionally, a service battery is

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 a non isolated model which has an electrical connection between the input and the output, making it suitable to applications with negative earthing. It is also compact and efficient, with low heat generation.

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: 326 W

Nominal output power: 272 W

Max. output current (for 2 min. intervals): 24 A

Continuous output current: 20 A

Nominal input voltage: 48 V

Input voltage range (max.): 40-62 V DC (65 V)

Galvanic isolation: no

Stabilised: yes

Dimensions, Height: 217mm x Width: 87mm x Depth: 50mm (8.5" x 3.4" x 2.0")

Weight: 0.77 kg (1.7 lb)

Compliance: CE, E-mark 

Technical specifications

DC consumption: 25 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.
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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: 35058392249

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4.3 ★★★★★
Based on 22 reviews
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Verified Purchase
SofaKing
Whiting, US
★★★★★ 5
Great fit and comfort!
Size: 10 Wide, Color: Black Leather/Black
Happy with these new Cole Haan dress shoes. Have been buy this brand for many yrs now as They are one of the most comfortable daily dress work shoe. I try to get the wide size when I can as I have more of a high instep and the wide shoe helps alleviate the tight fit along the top of the shoe. Have had this shoe for a few weeks now and is breaking in nicely.
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Reviewed in the United States on May 12, 2026
R
Verified Purchase
Rose kennly pierre
Dallas, US
★★★★★ 4
Comfortable and Stylish Shoes
Size: 8.5, Color: British Tan/Ivory
These shoes are very comfortable and stylish. The quality feels great, and they fit perfectly. I can wear them for a long time without discomfort. They look elegant with both casual and dress clothes. Definitely worth the price and I would recommend them to others. ⭐⭐⭐⭐⭐
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Reviewed in the United States on May 8, 2026
J
Verified Purchase
Josh R.
Chelsea, US
★★★★★ 5
Great Shoe
Size: 10.5 Wide, Color: Black Leather/Black
Great shoe! Especially for those that are on the move in a professional setting for a lot of the day. The only issue I’ve had with these so far are my shoe laces are warping. The shoe itself is holding up great.
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Reviewed in the United States on June 11, 2026
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Verified Purchase
G. Mays
Belleville, US
★★★★★ 5
A great purchase
Size: 10.5, Color: British Tan/Ivory
These shoes are very comfortable and attractive. Lots of people noticed them when I first wore them. I would not consider them the most dressy shoes you can buy, but they work for "business casual" and most other outfits (but not shorts).
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Reviewed in the United States on April 24, 2026
S
Verified Purchase
Shahbaz
New York, US
★★★★★ 4
All-Day Comfort for 10+ Hour Workdays. Finally Found a Pair That Holds Up
Size: 12, Color: Black Leather/Black, Size: 12, Color: Black Leather/Black
After years of trying different “comfortable” dress shoes, this is the first pair I’ve owned that I can wear for a full 10+ hour workday without counting down the minutes to take them off. For context, I’m a retail district manager. I’m on my feet most of the day walking stores, standing in conversations, moving constantly. I’ve owned Clarks, Rockport, and even higher-end dress shoes, and while some started out comfortable, none of them held up for an entire day without foot fatigue setting in. These Cole Haan shoes are different. What stands out: All-day comfort: No mid-day foot pain, even after long shifts. Solid construction: Genuine leather that takes and holds a polish well. Supportive sole: Noticeably helps with impact from constant walking. Great value: Performs better than shoes I’ve paid significantly more for. I also appreciate that they hit a nice middle ground stylistically; more business casual than formal, but still sharp enough for most professional environments. For additional context, I am a heavier individual and tend to wear down the outer (lateral) edge of my shoes first. That pattern holds true here as well. The only drawback: After about two months of wearing them 5 days a week (purchased January 7th), the sole shows more wear than I would expect at this point. It’s not a dealbreaker, but it’s the reason I’m giving 4 stars instead of 5. I’ll be including a comparison photo between the worn pair and a new pair for reference. That said, I still expect to get around 8–10 months of use out of them, which at this price point is more than fair. Bottom line: If you need a comfortable, reliable, and reasonably priced work shoe for long days on your feet, these outperform just about everything else I’ve tried, and that’s why I bought a second pair.
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Reviewed in the United States on March 24, 2026

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