{"product_id":"mastervolt-charge-mate-pro-90-90a-electronic-battery-charge-relay-12-24v","title":"Mastervolt Charge Mate Pro 90 90A Electronic Battery Charge Relay, 12\/24V","description":"\u003cp\u003e\u003cstrong\u003eCharge Mate Pro 90\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCurrent limited electronic charge relay with high efficiency and reverse current protection\u003c\/p\u003e\u003cp\u003eA 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.\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eA 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.\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eCharge Mate Pro: for controlled charging from a single source.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLeisure and professional marine and mobile applications. An effective solution for high power demand onboard and\/or the need for prioritized or current limited charging.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCharges two battery banks from a single source.\u003c\/li\u003e\n\u003cli\u003eElectronic charge coupling with very low voltage drop.\u003c\/li\u003e\n\u003cli\u003eMakes effective dual charging possible.\u003c\/li\u003e\n\u003cli\u003eSuitable for all battery types, including Lithium-Ion.\u003c\/li\u003e\n\u003cli\u003eCharge current secondary battery limited to 40 or 90 A.\u003c\/li\u003e\n\u003cli\u003eHigh system reliability by prioritizing charging of the main battery.\u003c\/li\u003e\n\u003cli\u003eUnidirectional which blocks return current under all circumstances.\u003c\/li\u003e\n\u003cli\u003ePrevents power dips in the onboard electrical network.\u003c\/li\u003e\n\u003cli\u003eSuitable for all kinds of chargers and alternators.\u003c\/li\u003e\n\u003cli\u003eMonitoring with LED status indication.\u003c\/li\u003e\n\u003cli\u003eIP65 electronics in a corrosion-resistant casing with aluminum heat sinks.\u003c\/li\u003e\n\u003cli\u003eFast and easy installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eGeneral Specifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMonitoring: LED (warnings and status indication)\u003c\/li\u003e\n\u003cli\u003eOutput current: limited to 90 A; \u0026gt; 25 C derating power\u003c\/li\u003e\n\u003cli\u003eNumber of battery outlets: 2\u003c\/li\u003e\n\u003cli\u003eInput voltage range: 9-32 V\u003c\/li\u003e\n\u003cli\u003eParallel configuration: Yes\u003c\/li\u003e\n\u003cli\u003eBattery voltage: Automatic 12\/24 V detection\u003c\/li\u003e\n\u003cli\u003eRemote switch functions: On, off, auto, start to assist\u003c\/li\u003e\n\u003cli\u003eDimensions, hxwxd: 157 x 140 x 80 mm\/6.2 x 5.5 x 3.1 inch\u003c\/li\u003e\n\u003cli\u003eWeight: 0.88 kg\/1.9 lb\u003c\/li\u003e\n\u003cli\u003eCompliance: CE\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConnection 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\u003c\/li\u003e\n\u003cli\u003ePower consumption: Switch open: \u0026lt; 1 mA at 12\/24 V DC\u003c\/li\u003e\n\u003cli\u003eBattery types: All types (Lithium-Ion protection via Multipurpose Contact Output, product code 77030500)\u003c\/li\u003e\n\u003cli\u003eSwitch on voltage: 13.5 V (12 V) \/ 27 V (24 V)\u003c\/li\u003e\n\u003cli\u003eSwitch on delay: 5 sec\u003c\/li\u003e\n\u003cli\u003eSwitch off voltage: 12.75 V (12 V) \/ 25.5 V (24 V)\u003c\/li\u003e\n\u003cli\u003eSwitch off delay: 2.5 sec\u003c\/li\u003e\n\u003cli\u003eRelay: Electronically (MOSFETs with a low voltage drop of max 0.2 V)\u003c\/li\u003e\n\u003cli\u003eTemperature range (ambient temp.): -40 C to 60 C\/-40 F to 140 F\u003c\/li\u003e\n\u003cli\u003eProtection degree: IP65\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/productimageserver.com\/prop65\/6pt.png\" alt=\"Warning\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e 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 \u003ca href=\"http:\/\/P65Warnings.ca.gov\"\u003eP65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eMastervolt Charge Mate Pro 90\u003c\/strong\u003e is a current-limited electronic charge relay designed for marine and mobile electrical systems that charge two battery banks from a single charger or alternator. With a 90-amp secondary charging limit, low voltage drop, and reverse-current protection, it helps prioritize the main battery while directing controlled charging to a service, bow thruster, or auxiliary battery.\u003c\/p\u003e\u003cp\u003eThe Charge Mate Pro 90 connects the battery banks during charging and keeps them isolated during discharge. Its unidirectional electronic design blocks return current, even when the secondary battery has a higher voltage, helping protect the starter battery and reduce power dips in the onboard electrical network. The unit is suitable for all battery types, including Lithium-Ion applications, and works with chargers and alternators. It can support large automotive alternators up to 180 amps and parallel operation with a 225-amp alternator for higher continuous power demands.\u003c\/p\u003e\u003cp\u003eAutomatic 12\/24-volt detection, LED monitoring, remote switch functions, and fast installation make this battery charge relay practical for leisure and professional marine installations as well as mobile applications. The corrosion-resistant enclosure features IP65-rated electronics and aluminum heat sinks for dependable system integration. An optional bypass switch can provide an emergency-start function, while an optional LED indicator can be connected for remote status monitoring.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-battery charging:\u003c\/strong\u003e Charges two battery banks from one charger or alternator while prioritizing the main battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90-amp current limiting:\u003c\/strong\u003e Limits charging current to the secondary battery for controlled power distribution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReverse-current protection:\u003c\/strong\u003e Unidirectional electronic switching blocks return current under all circumstances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad system compatibility:\u003c\/strong\u003e Supports 9–32V systems, automatic 12\/24V detection, all battery types, chargers, and alternators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-ready monitoring and construction:\u003c\/strong\u003e Includes LED status indication, IP65 electronics, a corrosion-resistant casing, and aluminum heat sinks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mastervolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Charge Mate Pro 90\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 83309002\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput current:\u003c\/strong\u003e Limited to 90A; power derating above 77°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery outlets:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput voltage range:\u003c\/strong\u003e 9–32V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery voltage:\u003c\/strong\u003e Automatic 12\/24V detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParallel configuration:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote functions:\u003c\/strong\u003e On, off, auto, and start assist\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 6.2 x 5.5 x 3.1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.9 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e -40°F to 140°F ambient\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection rating:\u003c\/strong\u003e IP65\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance:\u003c\/strong\u003e CE\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCalifornia Proposition 65 Warning\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e 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 \u003ca href=\"http:\/\/P65Warnings.ca.gov\"\u003eP65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eChoose the Mastervolt Charge Mate Pro 90 for controlled, prioritized dual-battery charging in marine and mobile power systems.\u003c\/p\u003e\u003ch3\u003eSEO Meta Description\u003c\/h3\u003e\u003cp\u003eMastervolt Charge Mate Pro 90 electronic battery charge relay delivers controlled 90A dual-battery charging with 12\/24V support and reverse-current protection.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":44937012445273,"sku":"93492","price":274.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/93492XL.jpg?v=1789835644","url":"https:\/\/www.marinepartsonly.com\/products\/mastervolt-charge-mate-pro-90-90a-electronic-battery-charge-relay-12-24v","provider":"Marine Parts Only","version":"1.0","type":"link"}