Mastervolt Alpha Pro III [45513000]
SKU: 46668242970

Mastervolt Alpha Pro III [45513000]

Sale price$176.85 Regular price$196.50
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Description

Mastervolt Alpha Pro III [45513000]Alpha Pro III Advanced 3 step charge regulator for standard and high performance alternators The propulsion engine of your boat or vehicles may be used to quickly charge your service batteries, either while cruising or taking a break. The advanced and powerful Alpha Pro III ensures fast and safe charging, protecting both the engine and the batteries. Building on 10 years of experience, the Alpha Pro III features a modernized look, higher power and

Alpha Pro III

Advanced 3-step charge regulator for standard and high performance alternators

The propulsion engine of your boat or vehicles may be used to quickly charge your service batteries, either while cruising or taking a break. The advanced and powerful Alpha Pro III ensures fast and safe charging, protecting both the engine and the batteries. Building on 10 years of experience, the Alpha Pro III features a modernized look, higher power and improved ease of use.

The Alpha Pro III measures the temperature and the voltage of your batteries to prevent overcharging, keeping them in perfect condition. It also monitors the engine load, thus reducing sound variations, wear and tear. The smart ‘keep alive’ feature solves a common problem causing unreliable tachometer readings. Via MasterBus, it communicates RPM, alternator status and charge status to create intelligent power systems. 

Pull the max out of your alternator

The alternator that comes with the engine is not optimally suited for charging service batteries. Designed for low cost and short charge cycles, it charges at a slow pace and is easily overheated. Replacing the standard regulator* with the Alpha Pro III optimizes this charging process, protects against overheating and overcharging and extends the lifetime of your batteries. 

(* not allowed on Euro 5/6 engines)

Super charge your system

For superfast charging at low RPM, Mastervolt recommends to combine the Alpha Pro III with a high performance alternator such as the reputable Alpha series. With 20 amps of field current capability, the Alpha Pro is the only 3-step regulator in the market capable of controlling alternators with outputs up to 400 A!

Alpha Pro III: Fast charging, anytime, anywhere. 

Features:

  • Transforms every alternator into a full temperature controlled 3-step charger.
  • Reduces run time, saves fuel, reduces noise and emissions.
  • Protects from overcharging and extends battery life.
  • Balances engine load, reducing RPM variations.
  • Compatible with standard and high performance alternators, incl. 200 A 400 A models.
  • Integrated ‘keep alive’ feature for reliable tachometer readings.
  • Suitable for every battery type, including Lithium Ion.
  • Suitable for 12 V and 24 V system voltages.
  • Masterbus compatible: simplifies wiring, saves space and weight, and creates optimal cooperation between Mastervolt products.

Applications:

Applications range from improving the performance of a standard alternator in a vehicle or boat, to generator replacement, when combined with a high performance alternator. 

WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.


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: 46668242970

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Collin M.
Fort Morgan, US
★★★★★ 5
Fun Dog Toy, Relatively Durable, Looks Great, and Squeaker Isn't Annoying!
Color: Deep Green, Size: 10 IN
This is a fun and well-made dog toy that’s held up better than expected, especially considering my dog usually makes quick work of stuffed toys. He’s not the most aggressive chewer, but he’s definitely skilled at tearing things up over time, and this one is still going strong so far. The plush armadillo design is adorable and comes in a variety of color options, which is a nice bonus. It has your standard fluff type filling, and I really appreciate that the squeaker has more of that low grunting sound (like a pig), rather than a sharp, high-pitched one. It’s much less annoying to listen to during playtime. The 10" size was just right for my 45 lb dog, offering a good size for tugging and carrying around. Comfortable to hold, seemingly durable so far, and cute design. Seems to be a winner, would recommend!
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Reviewed in the United States on June 28, 2025
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Verified Purchase
AmazonBob407
Lowell, US
★★★★★ 5
Perfect size, cute, reasonably durable, and my dog loves it.
Color: Pink, Size: 8 IN, Color: Pink, Size: 8 IN
I ordered this for my 2year old, 55lb Staffy Pitt mix. She’s usually pretty rough on toys. She seems to either destroy them after 15 minutes, or, in a few instances, decides that she likes them enough to treat them more gently, in which they last for months or longer. I have no idea how she chooses, but in this case, she pretty much immediately ripped off part of an ear, but then, and since that time, has played and chewed on it without causing further damage. The toy is pretty adorable and looks and feels well made. It’s not constructed with a super durable material like some toys made for aggressive chewers are, but it’s also not marketed as a toy for aggressive chewers, so the material used is appropriate. The fabric feels dense and of a high quality, and the stitching looks to be of a high quality as well. I chose the 8-inch version in pink, and I’m happy with this size. It’s not too big, nor too small, and is easily portable. It arrived smashed up in a small bag, and I thought maybe it would be deformed when I took it out, but it wasn’t. It unfolded right away and then maintained its normal shape perfectly. Happy with this product, and after receiving it, I ended up ordering another, this time the 6-inch version, and while that is also a nice option, I like, and feel that the 8-inch version is a better deal. If this toy continues to last for a few more months, I would order another one, as my dog enjoys playing with it. It’s not her go to toy, but it is one of the few she keeps in playing rotation on a regular basis.
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Reviewed in the United States on September 12, 2024
P
Verified Purchase
princeton von d
Draper, US
★★★★★ 5
Luxurious Feel, Durable Build… but Full Rotation Privileges Have Been Revoked 💙🦴 🐾
Color: Blue, Size: 6 IN, Color: Blue, Size: 6 IN
🐾 Hi, I’m PVD; toy curator, plush critic & occasional chew sommelier. This armadillo arrived beautifully packaged and immediately met my standards for texture, squeak clarity and cuddle factor. I originally gave it 5 stars for quality; and still do! But today I’m updating the review to reflect my current toy lifestyle rotation. 😌 What impressed me from day one: ✔️ High-end plush feel; soft enough to nap on, tough enough for energetic zoom bites and great relief from teething ✔️ Strong stitching; survived multiple “stress tests” (I chewed with intention) ✔️ HQ squeaker; not tinny or annoying, more of a honk ✔️ 6in is perfect size for small breeds; easy to carry during dramatic hallway walks Why it now gets 4 stars from a seasoned toy collector: ✘ As my luxury toy collection expanded, this one gets grabbed less often ✘ Simple design; I now favor more interactive or complex textures ✘ Still “keep-worthy,” just no longer VIP spot on the chaise lounge Best For: • Pups who enjoy soft comfort toys or emotional support snuggles • Light to moderate chewers • Dogs who like to carry their plushes around proudly • Ideal as a teething toy or thoughtful gift 🚫 Not ideal for: power chewers or highly stimulation-driven pups (like me now; my taste evolved) 📝 Final Re-Barks: Still recommend for pups who love cuddly squeaky companions. Great starter plush and great quality; just know that ultra-picky toy enthusiasts may rotate it out once newer models (or squeakier friends) arrive. — PVD (Plush Aficionado, Toy Rotation Director & High-Maintenance Household Icon) 🐶💁🏻‍♂️✨
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Reviewed in the United States on September 17, 2025
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sandy
Los Angeles, US
★★★★★ 5
Hollypet Gray is excellent
Color: Gray, Size: 14 IN
This GrayHollpet comes down the assembly line that produces a good product. It is tough and stays together Don't buy the brown one, it started to fall apart in less than 30 days. These can be a good product!
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Reviewed in the United States on February 3, 2026
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Verified Purchase
Melissa Overton
Birmingham, US
★★★★★ 4
Super cute
Color: Gray, Size: 8 IN
Super cute in person. Didn’t last two weeks with our aggressive chewer but he sure had fun with it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

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