SKU: 84994724016

Mastervolt Charge Mate Pro 40 - Electronics Charge Relay [83304002]

Sale price$110.70 Regular price$123.00
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Description

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

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.


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]
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SKU: 84994724016

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Melisa F
Carnegie, US
★★★★★ 3
Good quality, but hard
Color: Brown
The leather and metal seem to be of very good quality. My son bought this as his office/study chair. He is starting medical school and liked the professional look of this chair. He is 6’ tall and 200lb. There does not seem to be an issue with the chair rolling even with his weight. The chair is very ‘hard’ not that comfortable if you need to sit in it for long periods. Since my son needs to be staying awake to study, this will work for him as he won’t be able to get too comfortable and fall asleep.
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Reviewed in the United States on March 27, 2026
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Saeed Rabbanifar
New York, US
★★★★★ 5
Easy assembly and smooth movement
This chair has been a great addition to my home office. The assembly instructions are simple and easy to follow. The height adjusts smoothly, and the chair is very comfortable. I sit at my desk for about 9 hours a day, and this chair makes it easy to stay seated and work for long hours without discomfort. The cushioning and back support are solid. It spins well, and the wheels move smoothly. The build quality feels sturdy and reliable. Overall, a great value and a solid choice for anyone with a desk job. Highly recommend.
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Reviewed in the United States on April 5, 2026
J
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Jim N.
New York, US
★★★★★ 5
Great chair
Color: Brown
Love this chair. Very comfortable and supportive. Color matches my leather couch perfectly. Time consuming to put together.
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Reviewed in the United States on June 5, 2026
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Langle
Houston, US
★★★★★ 5
Beautiful and very steady office chair
Color: Brown, Color: Brown
Beautiful, Ergonomic, and very steady for this good quality leather office chair. The side armrests and the back support are very comfortable to seat. The assembly instruction and illustrated photos are quite simple to follow which make ease of assembly. I got the brown color leather which matches perfectly with my desk. Overall , I am very please with this office chair
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Reviewed in the United States on February 18, 2026
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Santiago
Dallas, US
★★★★★ 5
Excellent materials
Number of Items: 2
Incredible craft with this chair. For the price point it could definitely be over double the current price. Comfortable, easy to assemble and excellent materials.
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Reviewed in the United States on June 8, 2026

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