SKU: 52469676880

Mastervolt Charge Mate Pro 40 - Electronics Charge Relay

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Description

Mastervolt Charge Mate Pro 40 - Electronics Charge RelayCharge 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

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.

Applications

  • 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.

Features

  • 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

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.


Manufacturer Part Numbers: 83304002
Owner's Manual (PDF)
GRP:WRO
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SKU: 52469676880

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A
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AU household
Los Angeles, US
★★★★★ 5
Great Bible and commentary
Format: Imitation Leather
So much info in this Bible!! I love the commentary and can’t wait to continue to read it
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Reviewed in the United States on June 1, 2026
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Texas Bob
Carnegie, US
★★★★★ 5
Amazing detail and story
Format: Hardcover
We visited Chartwell in June 2023. I sure wish I had read this book prior to that visit. I was still able to scroll through my photographs and compare them with the book photos or comments. All in all the book is excellent. It manages to complete the story of Churchill in Exile and give the reader a glimpse of all the work he accomplished leading up to WWII. It also begs the question if given a leadership role earlier Churchill could have prevented the war in the first place. As someone who lost his uncle over France in 1943 that would have been nice. I highly recommend this book. A great man.
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Reviewed in the United States on December 26, 2024
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Nate Hanshaw
Grantham, US
★★★★★ 5
10/10 recommend
Format: Hardcover
Great book, especially if you're a fan on WWII or Winston Churchill! I never really dove into Churchill specifically before this book, but I was very impressed with how much influence he had leading up to the war, even when he wasn't a political official. It's also wild to think about how different things could have been if people took his warnings sooner. Overall I love the book and I think it's a very interesting read even if you're not that into history!
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Reviewed in the United States on October 5, 2025
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G Stewart
Louisville, US
★★★★★ 5
Churchill's "wilderness years" at Chartwell were perhaps the "important years" in preparing him.
Format: Hardcover
A brilliant idea for a new perspective on Churchill, and an even better execution. The author literally examines the guestbook over a ten-year period at Chartwell, Churchill's country home. Not only are the names of the guests fascinating, but the subjects of their discussions are eyebrow-raising in multitudes of ways. From Einstein to German spies, from politicians to celebrities, Churchill was not only busy maintaining connections he deemed useful, but his efforts to stay well-informed were Herculean. He did not hold an elected office during these "wilderness years," but he dictated volumes of books (no doubt improving his oratory skill), built brick walls, gardened, painted, and traveled like his life depended on it. It is fascinating to gain these new insights into the man. Depressed by his recent failure to be re-elected, he went to work instead of retiring. He imposed upon himself a strict diet of information protein, personal network building, philosophical expansion, and extraordinary production. All the visitors, discussions, and interactions ultimately resulted in the most fantastic preparation imaginable for a man destined to lead his country as Prime Minister during the greatest war the world has ever known. I found the book extremely well-written yet easy to read, finishing it in just two days.
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Reviewed in the United States on May 24, 2025
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Chris
Carnegie, US
★★★★★ 5
Excellent pre WW2 Churchill primer.
Format: Hardcover
This author has done an excellent job of explaining the role Churchill played in preparing Britain for WW2 despite being out of government for most of the 1930’s. The author is a curator and historian who has managed the collections at Chartwell, Churchill’s home during that time. Very well researched and easy to read. Anyone who studies 20th Century European history needs to read this book.
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Reviewed in the United States on February 6, 2025

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