Ultimate Passage Discount Marine Electronics
Email any questions to: Lisa@UltimatePassage.com

  • Manufacturer
  • Category
  • What's ON SALE!
  • REBATE Items
  • Site Map
  •  Garmin
  •  Raymarine
  •  Lowrance
  •  Jabsco
  •  Motorguide
  •  Taco Down Riggers
  •  Xantrex
     Garmin Mapping
     Humminbird Charts
     Lowrance Insight
     Furuno Vector Charts
     Fishing Hot Spots
  • 440-617-0025 (Ohio)
    9am to 5pm
    Fridays until 3pm
    via EMAIL Now!
  • Our Address:
    3399 Balsam Drive
    Westlake, OH 44145
    Note: NO RETURNS Accepted Here!
    Call/Email for an RMA.
  • Our Return Policy

  • Category: Xtras - Parts - Accessories


    ** Mastervolt Part Number - 83304002 **

    Our SKU# - 68306
    Click Here for Larger Image
    Mastervolt Charge Mate Pro 40 - Electronics Charge Relay
    Mastervolt Part Number:83304002
    MSRP/Retail Price:$249.70
    OUR PRICE:$167.43
    In Stock? NOT IN STOCK
    ETA: Usually Ships in 10-21 Days
    Condition: BRAND NEW
    from Mastervolt

    (NOT a "Refurb" or "Reman"!)

    Mastervolt Charge Mate Pro 40 - Electronics Charge Relay 83304002:

    Charge Mate Pro 40 - Electronics Charge Relay

    Current limited electronic charge relay with high efficiency and reverse current protection

    A secondary battery on board requires a dedicated charging solution. The Charge Mate Pro makes it possible to distribute the charger or alternator current effectively between two battery banks such as a starter and a service battery. The Charge Mate Pro connects both batteries during charging and keeps them isolated when discharging. This significantly reduces the risk of a flat starter battery for example.

    The Charge Mate Pro offers an additional advantage over mechanical charge relays, by limiting the charge current to the second battery. The primary battery, like a starter battery, is therefore charged with priority. The return current is automatically blocked even when the secondary battery has a higher voltage. An emergency start function is possible by connecting an optional bypass switch to the Charge Master Pro.

    A marine application example is the connection of a bow thruster battery to a service battery. The Charge Mate Pro ensures that the service battery is always charged with priority. The blocking of the return current from the bow thruster battery guarantees that the bow battery remains charged while the current limiting also prevents power dips of the onboard electrical network.

    The Charge Mate Pro series consist of a 40 Amp and a 90 Amp version, both suitable for charger or alternator applications.

    Charge Mate Pro: for controlled charging from a single source.


    • Leisure and professional marine and mobile applications. An effective solution for high power demand on board and/or the need of prioritised or current limited charging.


    • Electronic charge coupling with very low voltage drop
    • Makes effective dual charging possible
    • Suitable for all battery types, including Lithium Ion
    • Charge current secondary battery limited to 40 A
    • High system reliability by prioritised charging of the main battery
    • Unidirectional which blocks return current under all circumstances
    • Prevents power dips of the onboard electrical network
    • Suitable for all kinds of chargers and alternators
    • Monitoring with LED status indication
    • IP65 electronics in a corrosion resistant casing with aluminum heat sinks
    • Fast and easy installation

    General specifications

    • Remote switch functions:  on, off, auto, start assist
    • Monitoring: LED (warnings and status indication)
    • Output current: limited to 40 A
    • Number of battery outlets: 2
    • Input voltage range: 9-32 V
    • Parallel configuration: yes
    • Battery voltage: automatic 12/24 V detection
    • Dimensions, hxwxd: 157 x 140 x 80 mm / 6.2" x 5.5" x 3.1"
    • Weight: 0.88 kg / 1.9 lb
    • Approvals: CE

    Technical specifications

    • Connection possibilities: 3 x fast-on connectors (switch, ground and status) o switch: for an optional single pole ON-OFF-ON switch for remote operation o status: for an optional LED indicator
    • Power consumption: switch open: < 1 mA at 12/24 V DC
    • Battery types: all types (Lithium Ion protection via Multi purpose contact, product code 77030500)
    • Switch on voltage: 13.5 V (12 V) / 27 V (24 V)
    • Switch on delay: 5 sec.
    • Switch off voltage: 12.75 V (12 V) / 25.5 V (24 V)
    • Switch off delay: 2.5 sec.
    • Relay: electronically (mosfets with low voltage drop of max 0.2 V)
    • Temperature range (ambient temp.): -40 °C to 60 °C -40 to 140 °F
    • Protection degree: IP65

    WarningWARNING: 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.

    Retail Price: $249.70 Not in stock
    ETA: Usually Ships in 10-21 Days