Mastervolt Charge Mate Pro 90 Battery Isolator and Charger Relay

Charge Mate Pro 90

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

A secondary battery onboard 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 ChargeMaster 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 consists of a 40 Amp and a 90 Amp version, both suitable for charger or alternator applications. The Charge Mate Pro 90 ensures a higher charge current for example when charging Lithium-Ion batteries. It is also perfectly suitable for large automotive alternators up to 180 A and can be used in parallel operation with a 225 Amp alternator to fulfill even higher continuous power demands of your equipment on board.

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 onboard and/or the need for prioritized or current limited charging.

Features:

• Charges two battery banks from a single source.
• 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 or 90 A.
• High system reliability by prioritizing charging of the main battery.
• Unidirectional which blocks return current under all circumstances.
• Prevents power dips in 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:

• Monitoring: LED (warnings and status indication)
• Output current: limited to 90 A; > 25 C derating power
• Number of battery outlets: 2
• Input voltage range: 9-32 V
• Parallel configuration: Yes
• Battery voltage: Automatic 12/24 V detection
• Remote switch functions: On, off, auto, start to assist
• Dimensions, hxwxd: 157 x 140 x 80 mm/6.2 x 5.5 x 3.1 inch
• Weight: 0.88 kg/1.9 lb
• Compliance: CE

Technical Specifications:

• Connection possibilities: 3 x faston connectors (switch, ground, and status) switch: for an optional single-pole ON-OFF-ON switch for remote operation 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 Multipurpose Contact Output, 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 a low voltage drop of max 0.2 V)
• Temperature range (ambient temp.): -40 C to 60 C/-40 F to 140 F
• Protection degree: IP65

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

The Mastervolt Charge Mate Pro 90 is a high-efficiency electronic charge relay designed for effective dual battery management in marine and mobile applications. It facilitates the distribution of current from a single charging source, such as a charger or alternator, to two separate battery banks—like a starter and a service battery. This setup ensures that the primary battery receives priority during charging while maintaining isolation during discharging, reducing the risk of a dead starter battery.

Constructed with advanced electronic components, the Charge Mate Pro 90 offers features such as low voltage drop, reverse current protection, and a dedicated charge current limit of up to 90 amps. It automatically blocks return current from the secondary battery, even if it has a higher voltage, ensuring the main battery remains charged and ready to start. Its compatibility with all battery types, including Lithium-Ion, makes it versatile for various onboard power systems. Additionally, the device includes monitoring LED indicators for status updates and is built with IP65-rated electronics housed in a corrosion-resistant casing with aluminum heat sinks for durability and reliable operation in harsh environments.

The Charge Mate Pro 90 is suitable for large automotive alternators up to 180 amps and can be used in parallel configurations with higher power sources, such as a 225-amp alternator, to meet demanding power needs. Its quick and straightforward installation process allows for seamless integration into existing electrical setups, making it suitable for both professional and leisure marine applications. This device is ideal for systems requiring prioritized or limited current charging, especially when managing high power demands or ensuring system stability during operation.

Designed for a wide temperature range from -40°C to 60°C (-40°F to 140°F), the Charge Mate Pro 90 maintains performance in extreme conditions. Its compact size and lightweight design make it easy to install without occupying excessive space. With CE compliance, the device meets international safety and quality standards, providing peace of mind for critical onboard electrical systems. Whether used with various chargers or alternators, the Charge Mate Pro 90 ensures efficient, reliable, and controlled battery charging, safeguarding your power management system.

Features:

• Charges two battery banks from a single source

• Electronic charge coupling with very low voltage drop

• Makes effective dual charging possible

• Suitable for all battery types, including Lithium-Ion

• Charge current for secondary battery limited to 90 A

• High system reliability by prioritizing main battery charging

• Unidirectional design blocks return current at all times

• Prevents power dips in onboard electrical network

• Compatible with all chargers and alternators

• Monitoring with LED status indication

• IP65 rated electronics in corrosion-resistant casing with aluminum heat sinks

• Fast and easy installation