Mastervolt Charge Mate Pro 40 Electronic Charge Relay, 40 A, 12/24 V

The Mastervolt Charge Mate Pro 40 is an electronic charge relay for controlled charging from a single source. It connects two battery banks during charging and isolates them during discharge, while limiting charging to the secondary battery to 40 A and prioritizing the main battery.

• Suitable for charger and alternator applications in marine and mobile systems
• Two battery outlets with automatic 12/24 V detection
• Input voltage range: 9-32 V
• Secondary battery charge current limited to 40 A
• Electronic relay with a maximum voltage drop of 0.2 V
• Unidirectional operation blocks return current
• Remote switch functions: on, off, auto, and start assist
• LED monitoring for status and warnings
• Suitable for all battery types, including Lithium Ion; Lithium Ion protection requires Multi Purpose Contact, product code 77030500
• Parallel configuration supported
• IP65 protection with a corrosion-resistant casing and aluminum heat sinks
• Operating temperature range: -40 deg C to 60 deg C, or -40 deg F to 140 deg F
• Dimensions: 157 x 140 x 80 mm, or 6.2 x 5.5 x 3.1 in.
• Weight: 0.88 kg, or 1.9 lb
• Approvals: CE
• Manufacturer part number: 83304002
• UPC: 852968002981

Three fast-on connectors support optional remote switch, ground, and LED status connections. The relay is intended to help maintain prioritized charging and reduce power dips in onboard electrical networks, including applications such as service and bow-thruster battery systems.

Regulatory note: 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. See P65Warnings.ca.gov for more information.