{"product_id":"mastervolt-mac-plus-12-48-15-12v-to-36-48v-15a-bi-directional-dc-dc-battery-charger","title":"Mastervolt Mac Plus 12\/48-15 12V to 36\/48V 15A Bi-Directional DC-DC Battery Charger","description":"\u003cp\u003e\u003cstrong\u003eMac Plus 12\/48-15\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBoost Your Service Battery\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eToo often, service batteries dont get the charge they need. This is a problem made worse by smart alternators and start\/stop systems, which result in slow and insufficient charges. The Mac Plus 48V and 36V solve that problem. With brand-new bi-directional technology, the Mac Plus can use each side as an input or output, delivering a reliable and consistent charge to both service and starter batteries.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProven Mastervolt Quality\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Mac Plus uses the proven Mastervolt 3-step+ charge algorithm, delivering a quick and easy charge, even to completely flat batteries. By knowing when the engine is running and providing charge, you can also be sure that the Mac Plus will never drain your starter battery.\u003c\/p\u003e\u003cp\u003eA robust design holds up in even the harshest conditions, with battery temperature-optimized charging and high-quality aluminum housing to ensure superior protection against dust and water ingress. The power-efficient design also allows the Mac Plus to operate silently and without a fan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTotal Power Flexibility\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eWith a wide DC input range, the Mac Plus allows all DC sources and can charge two batteries from a single alternator or charger. It supports a full range of chemistries and battery types, including lithium. It also functions seamlessly with modern alternators such as Euro 5 and 6, ensuring proper charging by providing constant power, even when the alternator is inactive.\u003c\/p\u003e\u003cp\u003eParallel configuration of up to ten units will provide over 100 amperes. And advanced high-frequency technology with modern microprocessors ensures minimal power loss when switching from 36\/48V to 12\/24V and vice versa.\u003c\/p\u003e\u003cp\u003eAnalog voltage sense ports are also available to compensate for voltage drops and maintain proper charging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSuperior Monitoring  Control\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCompatibility with CZone, NMEA 2000, and MasterBus delivers truly superior monitoring and control and ensures Mac Plus integrates easily into complete systems. Achieve the best performance possible via various controllers and high-quality MOSFETs. And configure the Mac Plus with ease via MasterAdjust, the CZone configuration tool, or even via the on-board DIP switches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBi-directional technology\u003c\/li\u003e\n\u003cli\u003eGet either 48V or 36V power from a single unit\u003c\/li\u003e\n\u003cli\u003eFast and safe charging, even during short trips\u003c\/li\u003e\n\u003cli\u003eFanless design for silent operation\u003c\/li\u003e\n\u003cli\u003eSuitable for flooded, Gel, AGM, and Li-Ion batteries (incl. LiFePO4)\u003c\/li\u003e\n\u003cli\u003eEven charges fully depleted batteries\u003c\/li\u003e\n\u003cli\u003eEngine run detection protects the starter battery\u003c\/li\u003e\n\u003cli\u003eAdjustable current limits to meet Euro 5\/6 requirements\u003c\/li\u003e\n\u003cli\u003eVoltage stabilization protects sensitive equipment, lights, and loads\u003c\/li\u003e\n\u003cli\u003eParallel operation to obtain charging capacities well over 100 Amps\u003c\/li\u003e\n\u003cli\u003eMasterBus, CZone, and NMEA 2000 compatible, with intelligent system monitoring and automation\u003c\/li\u003e\n\u003cli\u003eTemperature compensation and voltage sense for an optimal charging result\u003c\/li\u003e\n\u003cli\u003eE-Mark\/R10 certification for mobile applications\u003c\/li\u003e\n\u003cli\u003ePower supply mode offers stable power for sensitive loads\u003c\/li\u003e\n\u003cli\u003eHeavy-duty connections for easy installation and quick setup via DIP switches\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eGeneral Specifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBattery Voltage Sense: Yes\u003c\/li\u003e\n\u003cli\u003eStatus indicator: Yes, 3 color double LED\u003c\/li\u003e\n\u003cli\u003eCommunication protocol: MasterBus, CZone  NMEA 2000\u003c\/li\u003e\n\u003cli\u003eOutput voltage: 30-60 V DC\u003c\/li\u003e\n\u003cli\u003eNominal output voltage: 36\/48 V\u003c\/li\u003e\n\u003cli\u003eOutput voltage stabilization: 2 % at extremes of temps, load, and input\u003c\/li\u003e\n\u003cli\u003eOutput voltage ripple (peak-peak): Max. 1 %\u003c\/li\u003e\n\u003cli\u003eMax. output power: 900 W\u003c\/li\u003e\n\u003cli\u003eMax. output current: 15 A\u003c\/li\u003e\n\u003cli\u003eNominal input voltage: 12 V DC\u003c\/li\u003e\n\u003cli\u003eInput voltage range: 8-16 V\u003c\/li\u003e\n\u003cli\u003eMax. input current: 60 A\u003c\/li\u003e\n\u003cli\u003eGalvanic isolation: No\u003c\/li\u003e\n\u003cli\u003eEfficiency: \u0026gt; 95 % (at nom. input voltage, full load); 97 % peak\u003c\/li\u003e\n\u003cli\u003eParallel configuration: Yes, up to 4\u003c\/li\u003e\n\u003cli\u003eAlarm contact: Yes, through MasterBus, CZone, DIP Switch, or remote switch\u003c\/li\u003e\n\u003cli\u003eEngine run signal input: Yes (active high\/active low)\u003c\/li\u003e\n\u003cli\u003eDIP switches: Yes, for basic setup\u003c\/li\u003e\n\u003cli\u003eDimensions, hxwxd: 255x165x66 mm, 10.0 x 6.5 x 2.6 inch\u003c\/li\u003e\n\u003cli\u003eWeight: 2 kg, 4.4 lb\u003c\/li\u003e\n\u003cli\u003eCompliance: CE, E-Mark, SAE J1171, ISO 8846 ignition protected, ABYC  UKCA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBattery types: Gel, AGM, Lithium Ion, user-defined\u003c\/li\u003e\n\u003cli\u003ePower consumption: \u0026lt; 5 mA, \u0026lt; 10 mA in CZone, \u0026lt; 1 mA in MasterBus\u003c\/li\u003e\n\u003cli\u003eTemperature range (ambient temp.): - 25 C to 60 C; derating \u0026gt; 40 C\/104 F\u003c\/li\u003e\n\u003cli\u003eCooling: Natural cooling\u003c\/li\u003e\n\u003cli\u003eProtection degree: IP23\u003c\/li\u003e\n\u003cli\u003eProtections: Overload, over-temperature, DC short circuit, reversed polarity (fuse)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eMastervolt Mac Plus 12\/48-15\u003c\/strong\u003e is a bi-directional DC-DC battery charger designed to provide dependable charging between a 12-volt starter battery system and 36- or 48-volt service battery systems. It is well suited for mobile and marine applications that use smart alternators, start\/stop systems, or short engine-running periods where conventional charging may be insufficient.\u003c\/p\u003e\u003cp\u003eUsing Mastervolt’s proven 3-step+ charging algorithm, the Mac Plus delivers fast, controlled charging to supported battery chemistries, including Gel, AGM, lithium-ion, and user-defined battery types. Engine-run detection helps prevent the starter battery from being drained, while adjustable current limits support operation with modern Euro 5 and Euro 6 alternators. Its voltage stabilization and power supply mode help provide consistent DC power for sensitive equipment, lighting, and other loads.\u003c\/p\u003e\u003cp\u003eThe fanless, naturally cooled design operates quietly and uses a durable aluminum housing for protection in demanding environments. Battery temperature compensation and voltage-sense connections help optimize charging performance, while MasterBus, CZone, and NMEA 2000 compatibility enables system monitoring, configuration, and control. The Mac Plus can also be configured using onboard DIP switches, and multiple units can be used in parallel for higher charging capacity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBi-directional charging:\u003c\/strong\u003e Allows either side of the unit to function as an input or output for flexible starter and service battery charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e36V or 48V output:\u003c\/strong\u003e Provides selectable nominal output voltage from a 12V DC input system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad battery compatibility:\u003c\/strong\u003e Supports Gel, AGM, lithium-ion, including LiFePO4, and user-defined battery types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart charging control:\u003c\/strong\u003e Includes engine-run detection, adjustable current limits, temperature compensation, and voltage sensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuiet, efficient operation:\u003c\/strong\u003e Fanless natural cooling and efficiency of more than 95% at nominal input voltage and full load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem integration:\u003c\/strong\u003e Compatible with MasterBus, CZone, and NMEA 2000 for monitoring and control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\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 Mac Plus 12\/48-15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 81203205\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal input voltage:\u003c\/strong\u003e 12V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput voltage range:\u003c\/strong\u003e 8–16V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal output voltage:\u003c\/strong\u003e 36\/48V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput voltage range:\u003c\/strong\u003e 30–60V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum output power:\u003c\/strong\u003e 900W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum output current:\u003c\/strong\u003e 15A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum input current:\u003c\/strong\u003e 60A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Natural cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection rating:\u003c\/strong\u003e IP23\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommunication:\u003c\/strong\u003e MasterBus, CZone, and NMEA 2000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParallel configuration:\u003c\/strong\u003e Up to 4 units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e -13°F to 140°F, with derating above 104°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications and compliance:\u003c\/strong\u003e CE, E-Mark, SAE J1171, ISO 8846 ignition protected, ABYC, and UKCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.4 lb\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Mastervolt Mac Plus 12\/48-15 for flexible, efficiently controlled DC-DC charging in advanced 36V and 48V battery systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Mastervolt Mac Plus 12\/48-15 bi-directional DC-DC charger delivers flexible 36V or 48V battery charging from a 12V system.\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\u003ctr\u003e\u003ctd\u003eOwners Manual Url: https:\/\/productimageserver.com\/literature\/ownersManual\/102913OM.pdf\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":44937054879833,"sku":"102913","price":650.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/102913XL.jpg?v=1789837032","url":"https:\/\/www.marinepartsonly.com\/products\/mastervolt-mac-plus-12-48-15-12v-to-36-48v-15a-bi-directional-dc-dc-battery-charger","provider":"Marine Parts Only","version":"1.0","type":"link"}