Mastervolt

Mastervolt Alpha Pro III

£461.81
Tax included. Shipping calculated at checkout.
45513000
Advanced three-step charge regulator that turns any standard or high-performance alternator into a temperature-controlled charger. Protects batteries from overcharging, extends their life and suits 12 V and 24 V systems including lithium ion.

Available for collection or delivery in ~1 day

Pickup available at Mercury Yacht Harbour

Usually ready in 2-4 days

Description

The Mastervolt Alpha Pro III is an advanced three-step charge regulator that turns any standard or high-performance alternator into a fully temperature-controlled charger. It lets you use the boat or vehicle engine to charge service batteries quickly and safely, whether under way or at rest, while protecting both the engine and the batteries.

The Alpha Pro III measures battery temperature and voltage to prevent overcharging, and monitors engine load to reduce sound variations, wear and tear. Its smart keep-alive feature ensures reliable tachometer readings, and via MasterBus it shares rpm, alternator status and charge status to build intelligent power systems. With up to 20 amps of field current it can control alternators rated as high as 400 A, and it suits every battery type including lithium ion on both 12 V and 24 V systems.

PRODUCT DETAILS

  • Transforms any alternator into a temperature-controlled three-step charger
  • Reduces run time, saves fuel and cuts noise and emissions
  • Protects batteries from overcharging and extends their life
  • Balances engine load to reduce rpm variations
  • Controls standard and high-performance alternators including 200 to 400 A models
  • Up to 20 amps of field current capability
  • Integrated keep-alive feature for reliable tachometer readings
  • Suitable for every battery type including lithium ion
  • MasterBus compatible for simplified wiring and system integration
  • Alpha Pro III charge regulator
  • Battery temperature sensor with 6 m cable

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General specifications

Link to MasterShuntyes
Connection to Mastervolt alternatoryes
Connection to Bosch alternatoryes, using a Bosch adapter cable (product code 45510500)
Nominal battery voltage12 V / 24 V
Connection plug regulator/alternatorAlpha/Mastervolt
Coolingfanless
MasterBus poweringyes
Display/read-outLED display
Dimensions, hxwxd90 x 109 x 30 mm (3.5 x 4.3 x 1.2 inch)
Weight0.4 kg (0.9 lb)
Delivered withbattery temperature sensor with 6 m (20 ft) cable
ComplianceCE

Technical specifications

Charge characteristicIUoUo, automatic / 3-step+ for Gel/AGM/flooded/Lithium Ion
Charge voltage Bulk/Absorption/Floatdefault setting for AGM, Gel and Lithium Ion (adjustable)
Absorption time4 hours, adjustable from 2 minutes to 12 hours
Temperature compensation-30 mV / C (-17 mV / F)
DC voltage compensationvoltage drop compensation in DC cables up to 3 V
Field currentup to 20 amps
MasterBus compatibleyes

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What does the Alpha Pro III do?
It is a three-step charge regulator that takes control of an alternator and charges service batteries in a controlled, temperature-compensated way, protecting the batteries from overcharging and extending their life.
Can it be used with non-Mastervolt alternators?
Yes. It connects directly to Mastervolt alternators and to Bosch-type alternators using a Bosch adapter cable (product code 45510500). An alternator compatibility list is available in the downloads.
Which battery types does it support?
It suits every battery type, including AGM, Gel, flooded and lithium ion, on both 12 V and 24 V systems, with adjustable charge voltages.
How powerful an alternator can it control?
With up to 20 amps of field current the Alpha Pro III can control alternators with outputs up to 400 A, including high-performance models.
Can the standard engine regulator be replaced on any engine?
Replacing the standard regulator is not permitted on Euro 5 or Euro 6 engines. On other engines the Alpha Pro III optimises charging and protects against overheating and overcharging.