{"product_id":"victron-bluesolar-pwm-lcd-usb-duo-dual-battery-12","title":"Victron Energy - 12\/24V - 20A - BlueSolar PWM - LCD \u0026 USB (DUO Dual Battery) - Solar Charge Controller","description":"\u003ch2\u003eVictron BlueSolar PWM-DUO LCD\u0026amp;USB 12\/24V 20A: Dual Battery Solar Charge Controller with Intelligent Load Management\u003c\/h2\u003e\n\u003ch3\u003eProfessional-Grade Solar Regulation for Independent Dual Battery Charging\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eVictron BlueSolar PWM-DUO LCD\u0026amp;USB 12\/24V 20A\u003c\/strong\u003e is a sophisticated \u003cstrong\u003ePWM solar charge controller\u003c\/strong\u003e engineered to charge two separate battery banks from a single solar array. Unlike standard single-bank controllers, the DUO model features a programmable charge current ratio, allowing precise distribution of available solar energy between a primary service battery and a secondary starter or auxiliary battery. This makes it an ideal solution for \u003cstrong\u003e4WD dual battery systems\u003c\/strong\u003e, \u003cstrong\u003emarine installations\u003c\/strong\u003e, \u003cstrong\u003ecaravans\u003c\/strong\u003e, and \u003cstrong\u003eoff-grid setups\u003c\/strong\u003e where maintaining both a deep-cycle house battery and a cranking battery is critical.\u003c\/p\u003e\n\u003cp\u003eWith automatic 12\/24V system voltage detection, a backlit \u003cstrong\u003eLCD display\u003c\/strong\u003e for real-time monitoring, and dual integrated \u003cstrong\u003e5V 2A USB ports\u003c\/strong\u003e for direct device charging, this controller combines essential power management functions in a compact, IP20-rated chassis. The included remote battery temperature sensor enables voltage compensation based on actual battery temperature, promoting longer battery life and safer charging in fluctuating environmental conditions.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual battery charging\u003c\/strong\u003e with programmable current ratio for independent management of two battery banks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-stage charging\u003c\/strong\u003e (bulk, absorption, float) with fully adjustable voltage setpoints for lead-acid and lithium (LiFePO4) batteries\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated LCD display\u003c\/strong\u003e for clear visibility of system status, battery voltage, and charge current\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 5V 2A USB outputs\u003c\/strong\u003e for convenient charging of phones, tablets, and other USB-powered devices\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable load output\u003c\/strong\u003e with low-voltage disconnect and manual control, protected against overload and short circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive electronic protections\u003c\/strong\u003e: reverse polarity (battery and solar), over-temperature, and lightning surge protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded remote temperature sensor\u003c\/strong\u003e for accurate temperature-compensated charging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLighting control function\u003c\/strong\u003e with fully programmable timer for dusk-to-dawn or timed lighting applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvanced Dual Battery Management\u003c\/h3\u003e\n\u003cp\u003eIn many mobile and off-grid power systems, a single solar array must service both a deep-cycle battery for appliances and a starter battery for engine cranking. The BlueSolar PWM-DUO addresses this by allowing the user to set a custom charge current split (e.g., 80% to house battery, 20% to starter battery). This prevents overcharging of the starter battery while ensuring the service battery receives the bulk of available solar energy. The controller automatically detects 12V or 24V nominal system voltage, simplifying installation and reducing the risk of misconfiguration.\u003c\/p\u003e\n\u003ch3\u003eIntelligent Charging and Load Control\u003c\/h3\u003e\n\u003cp\u003eThe controller employs a \u003cstrong\u003ethree-stage charging algorithm\u003c\/strong\u003e (bulk, absorption, float) that can be fully programmed via the onboard LCD interface and push buttons. This allows precise tailoring of charge voltages to suit flooded lead-acid, AGM, gel, or LiFePO4 battery types. The load output terminal can be configured for low-voltage disconnect to protect batteries from deep discharge, or used as a programmable lighting controller with dusk-to-dawn functionality. The dual USB ports provide a regulated 5V output independent of the load terminals, enabling direct charging of mobile devices without additional adapters.\u003c\/p\u003e\n\u003ch3\u003eRobust Protection and Reliability\u003c\/h3\u003e\n\u003cp\u003eVictron's BlueSolar PWM series is built for demanding environments. The DUO model includes electronic protection against reverse polarity connection of both the solar array and battery, preventing damage during installation. Over-temperature protection ensures safe operation up to 55°C ambient at full load, while the common negative grounding simplifies integration with existing vehicle or marine electrical systems. The IP20 enclosure is designed for indoor or protected mounting, with 16 mm² (AWG6) terminals that accept substantial cable sizes for low-loss connections.\u003c\/p\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4WD and camping dual battery systems\u003c\/strong\u003e: Maintain starting battery charge while powering fridge, lights, and accessories from the auxiliary battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine and boating\u003c\/strong\u003e: Keep both house and engine batteries topped up from solar, with corrosion-resistant construction suitable for protected marine environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaravans and RVs\u003c\/strong\u003e: Charge the house battery bank and vehicle starter battery simultaneously during storage or off-grid camping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote off-grid cabins\u003c\/strong\u003e: Manage two separate battery banks for redundancy or different voltage requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLighting control\u003c\/strong\u003e: Use the programmable load output for automatic solar-powered lighting in sheds, signage, or security applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose Victron BlueSolar PWM-DUO?\u003c\/h3\u003e\n\u003cp\u003eCompared to generic PWM controllers, the Victron BlueSolar PWM-DUO offers superior build quality, advanced programmability, and the reliability expected from a leading power electronics manufacturer. The inclusion of a remote temperature sensor, dual USB ports, and a clear LCD interface reduces the need for additional components and monitoring equipment. Its ability to charge two batteries independently from a single solar array eliminates the complexity and cost of installing separate charge controllers or battery isolators, making it a cost-effective solution for dual battery solar charging.\u003c\/p\u003e\n\u003cp\u003eWith a maximum solar input voltage of 28V for 12V systems and 55V for 24V systems, this controller is compatible with standard 36-cell and 72-cell solar panels respectively. The 20A rated charge current supports solar arrays up to approximately 280W at 12V or 560W at 24V, providing ample capacity for most small to medium off-grid power systems.\u003c\/p\u003e\n\u003ch3\u003eTake Control of Your Dual Battery Solar System\u003c\/h3\u003e\n\u003cp\u003eEquip your 4WD, boat, or off-grid setup with the \u003cstrong\u003eVictron BlueSolar PWM-DUO LCD\u0026amp;USB 12\/24V 20A\u003c\/strong\u003e and experience reliable, programmable dual battery charging from a trusted brand. Order today to simplify your solar power management and keep both your batteries ready for action.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"product-specifications\" style=\"width:100%; border-collapse:collapse; border:1px solid #d9d9d9; table-layout:auto;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eModel\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eBlueSolar PWM-DUO LCD-USB 12\/24-20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eBattery Voltage\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e12\/24 V With Automatic System Voltage Detection [For LiFePO4 No Automatic System Voltage Detection]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eRated Charge Current\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e20 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eSecond Battery Output\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eLoad Output\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e2 USB Ports 5 V \/ 2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eAutomatic Load Disconnect\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e10.5 V \/ 21 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eMaximum Solar Voltage\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e28 V \/ 55 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eSelf-Consumption\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e10 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eProtections\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eBattery Reverse Polarity (Fuse), Over Temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eGrounding\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eCommon Negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eOperating Temp. Range\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e-35 to +55°C (Full Load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eHumidity (Non-Condensing)\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eMax 95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eCharge Voltage 'Absorption'\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e14.4 V \/ 28.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eCharge Voltage 'Float'\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e13.7 V \/ 27.4 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eBattery Temperature Sensor\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eYes, Remote Sensor [Included]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eTemperature Compensation\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e-30 mV\/°C \/ -60 mV\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eProtection Class\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eTerminal Size\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e16 mm² \/ AWG6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eDimensions (H x W x D)\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e101.5 x 184.0 x 47.1 mm [4.0 x 7.4 x 1.8 inch]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eSafety\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eIEC 62109-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eEMC\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eEN 61000-6-1, EN 61000-6-3, ISO 7637-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Victron","offers":[{"title":"Default Title","offer_id":52364341870875,"sku":"Vic-SCC010020060","price":84.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0854\/3354\/9083\/files\/Vic-SCC010020060-01.jpg?v=1781658935","url":"https:\/\/www.nbcampingequipment.com.au\/products\/victron-bluesolar-pwm-lcd-usb-duo-dual-battery-12","provider":"NB Camping Equipment","version":"1.0","type":"link"}