SKU: 49382569251

Mastervolt Mass 24/25-2 25 AMP 24V Battery Charger [40020256]

$611.55 $679.50
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Description

Mastervolt Mass 24/25-2 25 AMP 24V Battery Charger [40020256]Mass 24 25 2 25 AMP 24V Battery Charger The right choice for demanding conditions Mass battery chargers are designed for the toughest conditions for professional, semi professional, and recreational purposes. Even under the most extreme conditions, the products from the Mass series operate faultlessly, giving you round the clock output when necessary. The sustainability and technologies underpinning the Mass concept have long been proven. With an MTBF

Mass 24/25-2 25 AMP 24V Battery Charger

The right choice for demanding conditions

Mass battery chargers are designed for the toughest conditions for professional, semi-professional, and recreational purposes. Even under the most extreme conditions, the products from the Mass series operate faultlessly, giving you round-the-clock output when necessary. The sustainability and technologies underpinning the Mass concept have long been proven. With an MTBF of 180,000 hours at full capacity and 24/7 use, the Mass products are ideal for the toughest tasks and any situation that requires a reliable power supply. 

Powerful selling points:

  • Designed for the most difficult conditions.
  • Lightweight, stainless steel, anodized aluminum casing.
  • Coating of internal components prevents damage from dampness or condensation to ensure a longer lifespan.
  • Insensitive to electromagnetic effects from other devices.
  • Suitable for every type of battery, it also charges flat batteries.
  • It is delivered as standard with a temperature sensor.
  • Full power at temperatures of up to 45 degrees.
  • Load capacities from 80 to 1000 Ah or more.
  • Stable and ripple-free power supply, even without batteries. 
  • The Current Control function prevents the breakdown of fuses when the voltage drops.
  • Parallel switching is possible using multiple battery chargers.
  • Connections in accordance with CE, ABYC A-31 and IEC60945.
  • GMDSS models and panels available.
  • Certified by RRR, RMRS (does not apply to 24/75 120 V).  
  • Certified by DNV GL (only 24/25, 24/50, 24/75, 24/75 (120 V), 24/100 models).

GMDSS Compatible

The Mass series are designed for the most demanding situations. To help you comply with SOLAS regulations, all Mass battery chargers are GMDSS compatible. GMDSS stands for Global Maritime Distress and Safety System and allows users to monitor various alarm functions. GMDSS versions of the Mass 24/25 DNV, Mass 24/50, Mass 24/75, Mass 24/100, and Mass 24/100-3ph are available.

A separate remote panel is available, which is compatible with all Mass battery chargers.

A single front display with GMDSS remote panel is available for:     

  • Mass 24/25-2 DNV
  • Mass 24/50-2
  • Mass 24/75, Mass 24/100, Mass 24/100-3ph

Charging Lithium Ion batteries

Although Lithium Ion batteries are increasingly popular, there can be a lack of clarity when it comes to the charging process. This is not a problem with Mastervolt as the Mastervolt battery chargers communicate directly with the Lithium Ion battery via the integrated MasterBus (or have been adapted to the required charging voltages).

MasterBus compatible

Mass battery chargers can be easily connected to a MasterBus network with only one cable and one connection. You can also choose central, local, or remote monitoring, configuration, and control of your system.

Made tough by smart design 

The certified Mass battery chargers are very strong and designed to withstand heavy vibrations and shocks. Their premium quality components meet the highest possible specifications, while the smart and extra robust mounting adds to the professional end result.

Specifications:

  • Nominal output voltage: 24v
  • Total charge current: 25a at 28.5v
  • Number of battery outlets: 2
  • Charge current second output: 2a
  • Battery bank size: 50-250 ah
  • Nominal input voltage: 230v (180-265v), 50/60 Hz
  • Power supply mode: Yes
  • Galvanic isolation: Yes
  • Display/read-out: LED display

Specifications:

  • Charger Input - Voltage: 230v
  • Charger Output - Amps: 25a
  • Charger Output Voltage: 24v
  • Charging Banks: 2
  • Portable: No
  • Box Dimensions: 8"H x 14"W x 17"L WT: 11.65 lbs
  • UPC: 816882020520

Owner's Manual (pdf)
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: 49382569251

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4.8 ★★★★★
Based on 8 reviews
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Product Reviews
E
Verified Purchase
Eric L.
Fort Morgan, US
★★★★★ 5
Great quality and price. Excellent value.
Style: X5206 with Two Woofers
Sounds great loud
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
M
Verified Purchase
Monchy
Houston, US
★★★★★ 5
Best karaoke speaker!
Style: X3206 with One Woofer, Style: X3206 with One Woofer
I was looking to buy a karaoke speaker and all were underpowered or overpriced. This went on sale ~100 and for that price it is THE perfect karaoke speaker. It has dual mic inputs for duets, (4) voice effects, voice echo. Each mic had it's own volume adjustment, there's also adjustment for echo, bass and treble. These are all knobs which i like a lot. The volume is push button which i don't like and would have preferred a knob also . Still, it's a lot of fun for karaoke! What I Iike a lot is the line out. Why? If I feel it needs more power, I can connect to any other speaker with a 3.5mm input. To me this is better than TWS systems that only pair with the same model(s). Speaking of power, it is ok for the size and price. It will sound good indoors at your home or backyard. It may not be the best for a larger hall. But it does have that line-out jack that will let you connect to (almost) any other speaker you want. What I have found lacking so far is the battery life. Fully charged, it was used over BT connection for music at ~50% volume for maybe 1.5 hours with lights and for podcasts at ~15% volume, no lights for 6 .5 hours before it died. So the 14 hour claim must be an exaggeration or only under very specific conditions. Also, bass is adequate, but it's not a 'booming' bass but you can tell it's there. Overall volume is good but will also depend on the device connected.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 31, 2022
E
Verified Purchase
Emilio Suarez Romero
Port Orchard, US
★★★★★ 5
Great for Karaoke Nights and Small Parties!
Style: X3206 with One Woofer, Style: X3206 with One Woofer
We used the speaker for a recent get-together with around 30 people, and it did not disappoint. The karaoke features and mic input were a big hit, and the party lights added a fun touch. It's super easy to use, and the sound quality—especially the deep bass—is impressive for its size. One thing I really appreciated is the audio-in and audio-out options. If you have a DJ setup, it's super convenient to connect the speaker directly to your deck—no hassle at all. Bluetooth connection took a bit longer than expected to pair, but nothing too bad. Once connected, it worked smoothly the whole night. Great buy for anyone looking for a solid party speaker with versatility!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 18, 2025
R
Verified Purchase
Ryan
Dallas, US
★★★★★ 1
Terrible sound quality and bass
Style: X5206 with Two Woofers
Sounds cheap, didn’t come with a charger, and the bass does not vibrate at all, so I bought got a jbl 110 the next day. The jbl is a thousand times better, the bass blew me away, and the sound is very high quality. Don’t waste your time and money on it get a jbl
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
I
Verified Purchase
Iman.
Phoenix, US
★★★★★ 4
Turn me up turbo
Style: X3206 with One Woofer
I bought this for my performances assuming well of the brand (I’m a musician). My biggest complaint is that I wish it were louder. There have been performances where they’ve asked me to turn the volume up and surely enough it’s already at its loudest volume 🥴. The battery life is pretty good, it’s never died on me and I’ve had 4hr gigs before. The light is also a nice touch (and can turn on and off per your request of hitting a button). It makes a sound when you turn it on and off which can also be muted if you can catch it in time. Pretty easy for me to carry from place to place. Im not sure I’d recommend it to a musician but depending on what it is you need it for- it’s truly not bad. For the price it’s pretty average and until I can invest in a louder option, it gets the job done pretty okay.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2026

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