• Mastervolt Alpha Pro III
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Mastervolt

Mastervolt Alpha Pro III

Mastervolt Alpha Pro III

OM-MASTERVOLT-ALPHAPROIII-45513000

$340.54
$489.99 $340.54
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Overview

Put your boat or vehicle's propulsion engine to work charging service batteries with the Mastervolt Alpha Pro III. This alternator regulator manages charging in three steps, monitoring battery voltage and temperature to help prevent overcharging.

Key features

  • Temperature-controlled charging helps protect batteries and the alternator from overcharging and overheating.
  • More efficient charging can reduce engine run time, fuel use, noise and emissions.
  • Engine-load balancing helps limit RPM fluctuations and associated sound variations.
  • The keep alive function addresses unreliable tachometer readings.
  • MasterBus communication shares RPM, alternator status and charge status with the power system.
  • Support for standard and high performance alternators gives you options when improving service-battery charging.

Specifications

  • Brand: Mastervolt
  • Model: Alpha Pro III
  • Product type: 3-step alternator charge regulator
  • System voltages: 12V and 24V
  • Field current capability: 20A
  • Supported alternator outputs: Up to 400A
  • Alternator compatibility: Standard and high performance, including 200A and 400A models
  • Battery compatibility: All battery types, including lithium ion
  • Communication: MasterBus

Good to know

Replacing the standard regulator with the Alpha Pro III is not allowed on Euro 5/6 engines. Mastervolt recommends pairing it with a high performance alternator, such as an Alpha series model, for faster charging at low RPM.

Specifications

BrandMastervolt
Manufacturer part #45513000
UPC816882020377
Boxed dimensions4 x 4 x 1 in
Shipping weight0.09 lb
Country of originNETHERLANDS
⚠ California Prop 65 Warning: 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.

Shipping & returns

Free standard shipping

Standard shipping is free on every U.S. order — no minimum. Need it faster? Faster delivery options are available at checkout for qualifying orders. In-stock orders ship quickly with tracking; oversized and freight items may ship separately and can take a little longer. International rates are calculated at checkout.

30-day returns

Request a return within 30 days of delivery. Authorized returns are subject to a 15% restocking fee. Return shipping is paid by the buyer; items must be new and in original packaging. See our refund policy.

Genuine products

We source from authorized U.S. distributors. Every product is new, genuine and covered by the manufacturer warranty.

Genuine products

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