{"product_id":"bluesolar-pwm-duo-20a-12v-24v-solar-charge-controller","title":"BlueSolar PWM-DUO 20A Solar Charge Controller","description":"\u003cdiv style=\"font-weight: 700;\"\u003e\n\n\u003ch2 style=\"color: #DD1D1D;\"\u003e☀️ BLUESOLAR PWM DUO LCD \u0026amp; USB 12\/24V 20A SOLAR CHARGE CONTROLLER\u003c\/h2\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e20A Dual-Battery PWM Solar Controller – LCD Display, Two Battery Outputs, External Temperature Sensor \u0026amp; Dual 5V USB Charging\u003c\/h3\u003e\n\n\u003cp\u003e☀️ Manage solar charging for two separate battery banks with the BlueSolar PWM-DUO LCD-USB 12\/24-20 Charge Controller – a versatile 20A PWM solar regulator designed for applications such as boats, motorhomes, caravans and other dual-battery systems.\u003c\/p\u003e\n\n\u003cp\u003eThe DUO controller can charge two separate batteries from the connected solar array, making it suitable for configurations such as a starter battery and a service or auxiliary battery. The charging-current ratio between the two battery outputs is programmable, allowing the available solar charge to be distributed according to the requirements of the installation.\u003c\/p\u003e\n\n\u003cp\u003eA built-in LCD provides system monitoring and setup, while programmable charging algorithms support AGM, GEL, flooded lead-acid and LiFePO4 batteries with an internal BMS.\u003c\/p\u003e\n\n\u003cp\u003eThe controller also includes an external temperature sensor, two 5V USB outputs with a combined maximum output of 2A, three-stage charging, reverse-polarity protection and automatic 12V\/24V system-voltage detection for applicable battery types.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e⚡ KEY FEATURES\u003c\/h3\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🔋 Charges Two Separate Batteries\u003c\/span\u003e\u003cbr\u003e\nTwo independent battery outputs allow solar charging of separate battery banks, such as a starter battery and a service or auxiliary battery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e⚖️ Programmable Charge Current Ratio\u003c\/span\u003e\u003cbr\u003e\nThe charging-current ratio between the two battery outputs can be programmed to suit the required system configuration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e☀️ 20A Rated Charge Current\u003c\/span\u003e\u003cbr\u003e\nSupports a rated solar charge current of up to 20A.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🔋 Automatic 12V \/ 24V Detection\u003c\/span\u003e\u003cbr\u003e\nAutomatically detects 12V or 24V system voltage for applicable battery types.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e⚠️ Manual Voltage Selection for LiFePO4\u003c\/span\u003e\u003cbr\u003e\nAutomatic system-voltage detection is not provided for LiFePO4 batteries according to the supplied specifications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e📟 Built-In LCD Display\u003c\/span\u003e\u003cbr\u003e\nLiquid crystal display provides convenient system-status monitoring and controller setup.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🌡️ External Temperature Sensor Included\u003c\/span\u003e\u003cbr\u003e\nA remote battery temperature sensor is supplied with the controller.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🔌 Two 5V USB Outputs\u003c\/span\u003e\u003cbr\u003e\nProvides two USB charging outlets with a combined maximum current of 2A.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e⚙️ Programmable Battery Charging\u003c\/span\u003e\u003cbr\u003e\nSupports programmable charge algorithms for AGM, GEL, flooded lead-acid and suitable LiFePO4 batteries with an internal BMS.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🔄 Three-Stage Charging\u003c\/span\u003e\u003cbr\u003e\nUses bulk, absorption and float charging stages, with programmable settings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e💡 Programmable Lighting Control\u003c\/span\u003e\u003cbr\u003e\nThe supplied feature information includes a fully programmable lighting-control function.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🔌 Programmable Load Function\u003c\/span\u003e\u003cbr\u003e\nThe supplied description includes low-voltage and manual disconnect functionality together with overload and short-circuit protection for the load function.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🛡️ Reverse-Polarity Protection\u003c\/span\u003e\u003cbr\u003e\nDesigned with protection against reverse-polarity connection of the battery and\/or solar panels.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🌡️ Over-Temperature Protection\u003c\/span\u003e\u003cbr\u003e\nIncludes controller protection against excessive operating temperature.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #80FF00;\"\u003e🔩 Large 16mm² Terminals\u003c\/span\u003e\u003cbr\u003e\nSupports cable sizes up to approximately 16mm² \/ AWG6 at the specified terminals.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔋 DUAL-BATTERY SOLAR CHARGING\u003c\/h3\u003e\n\n\u003cp\u003eThe key feature of the BlueSolar PWM DUO is its ability to charge two separate batteries from a solar installation.\u003c\/p\u003e\n\n\u003cp\u003eA typical application could include:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e🚗 Vehicle or boat starter battery\u003c\/li\u003e\n  \u003cli\u003e🔋 Auxiliary or service battery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis can simplify solar charging in systems where maintaining both a starting battery and a separate house or service battery is required.\u003c\/p\u003e\n\n\u003cp\u003eThe charge-current ratio between Battery 1 and Battery 2 is programmable, providing greater flexibility than a conventional single-output solar regulator.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e⚖️ PROGRAMMABLE CHARGE CURRENT RATIO\u003c\/h3\u003e\n\n\u003cp\u003eThe DUO controller allows the available charge current to be distributed between its two battery outputs according to a programmable ratio.\u003c\/p\u003e\n\n\u003cp\u003eThis provides flexibility where one battery requires a greater share of the available solar charging than the other.\u003c\/p\u003e\n\n\u003cp\u003eFor example, a system may prioritise a larger service battery while still maintaining a separate starter battery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Configure the charge distribution and battery settings to suit the batteries and electrical system being used.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e📟 BUILT-IN LCD DISPLAY\u003c\/h3\u003e\n\n\u003cp\u003eThe integrated liquid crystal display provides convenient controller monitoring and setup without requiring a separate display.\u003c\/p\u003e\n\n\u003cp\u003eThe supplied features describe the LCD as supporting:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSystem status monitoring\u003c\/li\u003e\n  \u003cli\u003eController setup\u003c\/li\u003e\n  \u003cli\u003eBattery charging configuration\u003c\/li\u003e\n  \u003cli\u003eProgrammable operating functions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔄 THREE-STAGE BATTERY CHARGING\u003c\/h3\u003e\n\n\u003cp\u003eThe BlueSolar PWM DUO uses a three-stage charging process:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e⚡ Bulk\u003c\/li\u003e\n  \u003cli\u003e🔋 Absorption\u003c\/li\u003e\n  \u003cli\u003e🟢 Float\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe charge parameters are programmable, allowing the controller to be configured for the supported battery type.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔋 AGM, GEL, FLOODED \u0026amp; LIFEPO4 BATTERY ALGORITHMS\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied product information lists programmable charging algorithms for:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e🔋 AGM batteries\u003c\/li\u003e\n  \u003cli\u003e🔋 GEL batteries\u003c\/li\u003e\n  \u003cli\u003e🔋 Flooded lead-acid batteries\u003c\/li\u003e\n  \u003cli\u003e🔋 LiFePO4 batteries with an internal BMS\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: LiFePO4 use is specified for batteries with an internal BMS. Always configure the charge controller according to the battery manufacturer’s charging requirements.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e⚠️ LIFEPO4 SYSTEM VOLTAGE NOTE\u003c\/h3\u003e\n\n\u003cp\u003eThe controller normally provides automatic 12V\/24V system-voltage detection.\u003c\/p\u003e\n\n\u003cp\u003eHowever, the supplied specifications specifically state that automatic system-voltage detection does not apply to LiFePO4 operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: When using a compatible LiFePO4 battery, ensure the correct system voltage and charging configuration are selected as required rather than relying on automatic voltage detection.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🌡️ EXTERNAL BATTERY TEMPERATURE SENSOR INCLUDED\u003c\/h3\u003e\n\n\u003cp\u003eA remote external battery temperature sensor is included with the BlueSolar PWM DUO.\u003c\/p\u003e\n\n\u003cp\u003eThe supplied temperature-compensation specifications are:\u003c\/p\u003e\n\n\u003cp\u003e12V system: -30mV\/°C\u003c\/p\u003e\n\n\u003cp\u003e24V system: -60mV\/°C\u003c\/p\u003e\n\n\u003cp\u003eThis allows the controller to account for battery temperature when applying applicable temperature-compensated charging parameters.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e⚡ DEFAULT ABSORPTION VOLTAGE\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied default absorption charging voltages are:\u003c\/p\u003e\n\n\u003cp\u003e12V system: 14.4V\u003c\/p\u003e\n\n\u003cp\u003e24V system: 28.8V\u003c\/p\u003e\n\n\u003cp\u003eThe supplied information notes that alternative voltage settings are available and should be referenced in the controller manual.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🟢 DEFAULT FLOAT VOLTAGE\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied default float charging voltages are:\u003c\/p\u003e\n\n\u003cp\u003e12V system: 13.7V\u003c\/p\u003e\n\n\u003cp\u003e24V system: 27.4V\u003c\/p\u003e\n\n\u003cp\u003eAlternative charging voltage settings are available according to the supplied documentation.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔌 TWO 5V USB CHARGING OUTPUTS\u003c\/h3\u003e\n\n\u003cp\u003eThe controller includes two convenient 5V USB outputs.\u003c\/p\u003e\n\n\u003cp\u003eCombined maximum USB output current: 2A\u003c\/p\u003e\n\n\u003cp\u003eThese outputs can provide convenient low-voltage USB power for compatible devices within the limits of the controller.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: The 2A rating is the combined maximum across both USB outputs, not 2A per USB port.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e💡 PROGRAMMABLE LIGHTING CONTROL\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied feature list includes a fully programmable lighting-control function.\u003c\/p\u003e\n\n\u003cp\u003eThis can provide additional flexibility in suitable solar installations requiring controlled operation of connected lighting or loads.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔌 LOAD CONTROL \u0026amp; LOW-VOLTAGE DISCONNECT\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied feature description lists programmable load control with low-voltage and manual disconnect capability.\u003c\/p\u003e\n\n\u003cp\u003eAn automatic load-disconnect voltage is also supplied:\u003c\/p\u003e\n\n\u003cp\u003e12V system: Approximately 10.5V\u003c\/p\u003e\n\n\u003cp\u003e24V system: Approximately 21V\u003c\/p\u003e\n\n\u003cp\u003eThe supplied feature information also states overload and short-circuit protection for the load output.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ SPECIFICATION NOTE: The detailed supplied specification table identifies the load output as “2 USB ports 5V\/2A”, while the general product feature list separately describes programmable load and lighting functions. These supplied descriptions have been retained without assuming additional output-terminal specifications that were not provided.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🛡️ REVERSE-POLARITY PROTECTION\u003c\/h3\u003e\n\n\u003cp\u003eThe BlueSolar PWM DUO includes protection against reverse-polarity connection of the solar panels and\/or battery according to the supplied information.\u003c\/p\u003e\n\n\u003cp\u003eThe detailed specifications identify battery reverse-polarity protection as fuse protected.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Protection features should not be treated as a substitute for correct wiring. Always verify polarity before connecting the battery or solar array.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🌡️ OVER-TEMPERATURE PROTECTION\u003c\/h3\u003e\n\n\u003cp\u003eOver-temperature protection is included as part of the controller’s supplied protection features.\u003c\/p\u003e\n\n\u003cp\u003eThe specified operating temperature range extends from approximately -35°C to +55°C at full load.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e☀️ SOLAR INPUT VOLTAGE\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied maximum solar voltages are:\u003c\/p\u003e\n\n\u003cp\u003e12V system: Maximum approximately 28V\u003c\/p\u003e\n\n\u003cp\u003e24V system: Maximum approximately 55V\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Do not exceed the controller’s maximum permitted solar input voltage.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e☀️ SOLAR PANEL CONFIGURATION\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied panel guidance states:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFor 12V systems – use 36-cell solar panels\u003c\/li\u003e\n  \u003cli\u003eFor 24V systems – use a 72-cell solar panel or 2 × 36-cell panels connected in series\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Confirm the complete solar-array electrical specifications, including open-circuit voltage, remain within the controller’s input limits under expected operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔋 AUTOMATIC 12V \/ 24V SYSTEM DETECTION\u003c\/h3\u003e\n\n\u003cp\u003eThe BlueSolar PWM-DUO LCD-USB 12\/24-20 supports both 12V and 24V battery systems.\u003c\/p\u003e\n\n\u003cp\u003eAutomatic system-voltage detection is supplied for applicable battery configurations.\u003c\/p\u003e\n\n\u003cp\u003eLiFePO4 operation is specifically excluded from automatic system-voltage detection in the supplied technical information.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e⚡ 20A RATED CHARGE CURRENT\u003c\/h3\u003e\n\n\u003cp\u003eThe BlueSolar PWM DUO is rated for a maximum charge current of 20A.\u003c\/p\u003e\n\n\u003cp\u003eThis rating should be considered together with the connected solar-array voltage, battery-bank configuration, cable sizing and installation requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Do not exceed the controller’s rated 20A charging capacity.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔋 LOW CONTROLLER SELF-CONSUMPTION\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied controller self-consumption is approximately:\u003c\/p\u003e\n\n\u003cp\u003e10mA\u003c\/p\u003e\n\n\u003cp\u003eThis helps minimise the controller’s own electrical demand while connected to the battery system.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔩 COMMON NEGATIVE GROUNDING\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied grounding configuration is common negative.\u003c\/p\u003e\n\n\u003cp\u003eThis should be considered when integrating the controller into an existing vehicle, boat, motorhome or other DC electrical system.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🌡️ WIDE OPERATING TEMPERATURE RANGE\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied operating temperature range is:\u003c\/p\u003e\n\n\u003cp\u003eApproximately -35°C to +55°C at full load\u003c\/p\u003e\n\n\u003cp\u003eThe controller is also specified for non-condensing humidity levels up to approximately 95%.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e💧 IP20 ENCLOSURE\u003c\/h3\u003e\n\n\u003cp\u003eThe controller carries a supplied IP20 protection classification.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: IP20 does not indicate a waterproof enclosure. Install the controller in a suitable dry and protected location away from water, condensation and inappropriate environmental exposure.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🔩 16MM² \/ AWG6 TERMINAL CAPACITY\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied terminal size is:\u003c\/p\u003e\n\n\u003cp\u003e16mm² \/ AWG6\u003c\/p\u003e\n\n\u003cp\u003eUse correctly sized conductors for the current, cable length and voltage-drop requirements of the complete solar charging installation.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e🚐 IDEAL FOR DUAL-BATTERY MOBILE SYSTEMS\u003c\/h3\u003e\n\n\u003cp\u003eThe two-battery charging arrangement makes the BlueSolar PWM DUO particularly useful for compatible applications such as:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e🚐 Motorhomes\u003c\/li\u003e\n  \u003cli\u003e🚐 Caravans\u003c\/li\u003e\n  \u003cli\u003e🚤 Boats\u003c\/li\u003e\n  \u003cli\u003e🚙 Vehicle dual-battery systems\u003c\/li\u003e\n  \u003cli\u003e⛺ Camper trailers\u003c\/li\u003e\n  \u003cli\u003e🛻 Touring vehicles\u003c\/li\u003e\n  \u003cli\u003e🔋 Starter + auxiliary battery systems\u003c\/li\u003e\n  \u003cli\u003e☀️ Small off-grid solar systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e📏 COMPACT CONTROLLER DIMENSIONS\u003c\/h3\u003e\n\n\u003cp\u003eHeight: Approximately 101.5mm\u003c\/p\u003e\n\n\u003cp\u003eWidth: Approximately 184.0mm\u003c\/p\u003e\n\n\u003cp\u003eDepth: Approximately 47.1mm\u003c\/p\u003e\n\n\u003cp\u003eWeight: Approximately 0.3kg\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e📋 TECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\n\u003cp\u003eProduct: BlueSolar PWM-DUO LCD-USB 12\/24-20\u003c\/p\u003e\n\n\u003cp\u003eController type: PWM solar charge controller\u003c\/p\u003e\n\n\u003cp\u003eSystem voltage: 12V \/ 24V\u003c\/p\u003e\n\n\u003cp\u003eSystem-voltage detection: Automatic for applicable battery types\u003c\/p\u003e\n\n\u003cp\u003eLiFePO4 automatic voltage detection: No\u003c\/p\u003e\n\n\u003cp\u003eRated charge current: 20A\u003c\/p\u003e\n\n\u003cp\u003eSeparate battery outputs: 2\u003c\/p\u003e\n\n\u003cp\u003eProgrammable charge-current ratio: Yes\u003c\/p\u003e\n\n\u003cp\u003eDisplay: Liquid crystal display\u003c\/p\u003e\n\n\u003cp\u003eBattery temperature sensor: Yes – remote sensor included\u003c\/p\u003e\n\n\u003cp\u003eBattery algorithms: AGM, GEL, flooded lead-acid and LiFePO4 with internal BMS\u003c\/p\u003e\n\n\u003cp\u003eCharging stages: Bulk, absorption and float\u003c\/p\u003e\n\n\u003cp\u003eDefault absorption voltage – 12V system: 14.4V\u003c\/p\u003e\n\n\u003cp\u003eDefault absorption voltage – 24V system: 28.8V\u003c\/p\u003e\n\n\u003cp\u003eDefault float voltage – 12V system: 13.7V\u003c\/p\u003e\n\n\u003cp\u003eDefault float voltage – 24V system: 27.4V\u003c\/p\u003e\n\n\u003cp\u003eTemperature compensation – 12V: -30mV\/°C\u003c\/p\u003e\n\n\u003cp\u003eTemperature compensation – 24V: -60mV\/°C\u003c\/p\u003e\n\n\u003cp\u003eUSB outputs: 2 × 5V USB ports\u003c\/p\u003e\n\n\u003cp\u003eMaximum combined USB output: 2A\u003c\/p\u003e\n\n\u003cp\u003eAutomatic load disconnect – 12V: Approximately 10.5V\u003c\/p\u003e\n\n\u003cp\u003eAutomatic load disconnect – 24V: Approximately 21V\u003c\/p\u003e\n\n\u003cp\u003eMaximum solar voltage – 12V system: 28V\u003c\/p\u003e\n\n\u003cp\u003eMaximum solar voltage – 24V system: 55V\u003c\/p\u003e\n\n\u003cp\u003eSelf-consumption: Approximately 10mA\u003c\/p\u003e\n\n\u003cp\u003eReverse-polarity protection: Yes\u003c\/p\u003e\n\n\u003cp\u003eBattery reverse-polarity protection: Fuse\u003c\/p\u003e\n\n\u003cp\u003eOver-temperature protection: Yes\u003c\/p\u003e\n\n\u003cp\u003eGrounding: Common negative\u003c\/p\u003e\n\n\u003cp\u003eOperating temperature: Approximately -35°C to +55°C at full load\u003c\/p\u003e\n\n\u003cp\u003eHumidity: Maximum approximately 95%, non-condensing\u003c\/p\u003e\n\n\u003cp\u003eProtection class: IP20\u003c\/p\u003e\n\n\u003cp\u003eMaximum terminal size: 16mm² \/ AWG6\u003c\/p\u003e\n\n\u003cp\u003eDimensions: Approximately 101.5 × 184.0 × 47.1mm\u003c\/p\u003e\n\n\u003cp\u003eWeight: Approximately 0.3kg\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e📜 STANDARDS\u003c\/h3\u003e\n\n\u003cp\u003eSafety: IEC 62109-1\u003c\/p\u003e\n\n\u003cp\u003eEMC: EN 61000-6-1\u003c\/p\u003e\n\n\u003cp\u003eEMC: EN 61000-6-3\u003c\/p\u003e\n\n\u003cp\u003eAutomotive electrical transient standard: ISO 7637-2\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e☀️ PANEL CONFIGURATION GUIDANCE\u003c\/h3\u003e\n\n\u003cp\u003eFor a 12V installation, the supplied documentation specifies the use of a 36-cell solar panel.\u003c\/p\u003e\n\n\u003cp\u003eFor a 24V installation, the supplied documentation specifies either:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e1 × 72-cell solar panel, or\u003c\/li\u003e\n  \u003cli\u003e2 × 36-cell solar panels connected in series\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Panel cell count alone is not a substitute for checking the panel’s electrical specifications. Ensure the completed array remains within the controller’s maximum permitted solar voltage.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003e⚠️ INSTALLATION \u0026amp; BATTERY COMPATIBILITY\u003c\/h3\u003e\n\n\u003cp\u003eBefore installing the BlueSolar PWM DUO, confirm that the complete solar, battery and wiring configuration falls within the supplied controller specifications.\u003c\/p\u003e\n\n\u003cp\u003eCheck the following:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e12V or 24V battery-system voltage\u003c\/li\u003e\n  \u003cli\u003eBattery chemistry\u003c\/li\u003e\n  \u003cli\u003eCorrect charging algorithm\u003c\/li\u003e\n  \u003cli\u003eLiFePO4 battery has an internal BMS where applicable\u003c\/li\u003e\n  \u003cli\u003eCorrect manual system-voltage configuration for LiFePO4 where required\u003c\/li\u003e\n  \u003cli\u003eSolar-array maximum voltage\u003c\/li\u003e\n  \u003cli\u003eSolar charge current remains within the 20A controller rating\u003c\/li\u003e\n  \u003cli\u003eCorrect polarity before connection\u003c\/li\u003e\n  \u003cli\u003eSuitable cable size\u003c\/li\u003e\n  \u003cli\u003eAppropriate external circuit protection where required\u003c\/li\u003e\n  \u003cli\u003eCorrect terminal tightening and connection\u003c\/li\u003e\n  \u003cli\u003eSuitable charge-current ratio between Battery 1 and Battery 2\u003c\/li\u003e\n  \u003cli\u003eCorrect location for the supplied temperature sensor\u003c\/li\u003e\n  \u003cli\u003eDry installation environment suitable for an IP20 enclosure\u003c\/li\u003e\n  \u003cli\u003eAdequate airflow around the controller\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Incorrect battery settings can result in unsuitable charging. Configure the controller according to the battery manufacturer’s requirements.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: Do not connect a solar array that can exceed the controller’s specified 28V maximum on a 12V system or 55V maximum on a 24V system.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"color: #DD1D1D;\"\u003e⚠️ IMPORTANT: This controller is IP20 and should be installed in a dry, protected location.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2 style=\"color: #DD1D1D;\"\u003e❓ FREQUENTLY ASKED QUESTIONS\u003c\/h2\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the BlueSolar PWM DUO LCD \u0026amp; USB controller?\u003c\/h3\u003e\n\n\u003cp\u003eIt is a 20A PWM solar charge controller designed for 12V or 24V battery systems and capable of charging two separate batteries.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the model number?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied model designation is BlueSolar PWM-DUO LCD-USB 12\/24-20.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat does DUO mean?\u003c\/h3\u003e\n\n\u003cp\u003eThe DUO configuration provides two separate battery outputs, allowing the solar system to charge two batteries.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan it charge a starter battery and an auxiliary battery?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The supplied information specifically gives a starter battery and service battery in a boat or mobile home as an example application.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan I control how the solar charge is divided between the batteries?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The charge-current ratio between the two battery outputs is programmable.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the maximum rated charging current?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied rated charge current is 20A.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes the controller work on 12V?\u003c\/h3\u003e\n\n\u003cp\u003eYes. It supports 12V battery systems.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it work on 24V?\u003c\/h3\u003e\n\n\u003cp\u003eYes. It also supports 24V systems.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it automatically detect 12V or 24V?\u003c\/h3\u003e\n\n\u003cp\u003eYes, automatic system-voltage detection is supplied for applicable battery types.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes automatic 12V\/24V detection work with LiFePO4?\u003c\/h3\u003e\n\n\u003cp\u003eNo. The supplied specifications specifically state that LiFePO4 does not use automatic system-voltage detection.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan it charge LiFePO4 batteries?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The supplied charging algorithms include LiFePO4 batteries with an internal BMS.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan it charge AGM batteries?\u003c\/h3\u003e\n\n\u003cp\u003eYes. AGM charging algorithms are included.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan it charge GEL batteries?\u003c\/h3\u003e\n\n\u003cp\u003eYes. GEL charging algorithms are included.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan it charge flooded lead-acid batteries?\u003c\/h3\u003e\n\n\u003cp\u003eYes. Flooded lead-acid battery algorithms are included.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat charging stages does it use?\u003c\/h3\u003e\n\n\u003cp\u003eThe controller uses bulk, absorption and float charging stages.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan the charging settings be programmed?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The supplied product information describes the charging process and battery algorithm as programmable.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the default absorption voltage?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied defaults are 14.4V for a 12V system and 28.8V for a 24V system.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the default float voltage?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied defaults are 13.7V for a 12V system and 27.4V for a 24V system.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eCan those voltages be changed?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The supplied documentation states that alternative voltage settings are available and refers users to the manual.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it have an LCD screen?\u003c\/h3\u003e\n\n\u003cp\u003eYes. A built-in liquid crystal display is included for status monitoring and setup.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it include a battery temperature sensor?\u003c\/h3\u003e\n\n\u003cp\u003eYes. A remote external battery temperature sensor is included.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the supplied temperature compensation?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied values are -30mV\/°C for a 12V system and -60mV\/°C for a 24V system.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it have USB outputs?\u003c\/h3\u003e\n\n\u003cp\u003eYes. Two 5V USB outputs are included.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eHow much current can the USB ports provide?\u003c\/h3\u003e\n\n\u003cp\u003eThe two ports have a combined maximum output of approximately 2A.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eIs that 2A per USB port?\u003c\/h3\u003e\n\n\u003cp\u003eNo. The supplied specification states that 2A is the combined maximum current for both USB outputs.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it have a lighting-control function?\u003c\/h3\u003e\n\n\u003cp\u003eYes. A fully programmable lighting-control function is included in the supplied feature information.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it have low-voltage load disconnect?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied features include programmable low-voltage and manual load disconnect functionality.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat are the automatic disconnect voltages?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied figures are approximately 10.5V for a 12V system and 21V for a 24V system.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it protect against load overload and short circuit?\u003c\/h3\u003e\n\n\u003cp\u003eYes. Overload and short-circuit protection for the supplied load function are included in the feature description.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhy does the specification table call the load output the USB ports?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied information contains both descriptions: the general feature list describes programmable load and lighting control, while the detailed specification table lists “2 USB ports 5V\/2A” under load output. This listing retains both supplied statements without assuming additional terminal specifications that were not provided.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it have reverse-polarity protection?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The supplied information states that the controller is protected against reverse-polarity connection of the solar panels and\/or battery.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eDoes it have over-temperature protection?\u003c\/h3\u003e\n\n\u003cp\u003eYes. Over-temperature protection is listed in the supplied technical specifications.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the maximum solar voltage on a 12V system?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied maximum is approximately 28V.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the maximum solar voltage on a 24V system?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied maximum is approximately 55V.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat solar panel should I use on a 12V system?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied guidance specifies a 36-cell solar panel for 12V operation.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat solar panel arrangement should I use on 24V?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied guidance specifies either a 72-cell solar panel or two 36-cell panels connected in series.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eHow much power does the controller itself consume?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied self-consumption figure is approximately 10mA.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eIs the controller common-negative?\u003c\/h3\u003e\n\n\u003cp\u003eYes. Common-negative grounding is specified.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat operating temperature range is specified?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied operating range is approximately -35°C to +55°C at full load.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat humidity can it operate in?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied specification lists a maximum of approximately 95% non-condensing humidity.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eIs the controller waterproof?\u003c\/h3\u003e\n\n\u003cp\u003eNo waterproof rating is supplied. The enclosure is rated IP20, so it should be installed in a suitable dry and protected location.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat size cable terminals does it have?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied maximum terminal size is 16mm² \/ AWG6.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eHow large is the controller?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied dimensions are approximately 101.5mm high × 184.0mm wide × 47.1mm deep.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eHow much does it weigh?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied weight is approximately 0.3kg.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat standards are listed?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplied standards include IEC 62109-1 for safety and EN 61000-6-1, EN 61000-6-3 and ISO 7637-2 for applicable electromagnetic compatibility and electrical transient requirements.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eIs this suitable for a boat?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The supplied product information specifically gives charging the starter and service batteries of a boat as an example of the dual-battery function. Installation must still be appropriate for the environment, particularly because the controller enclosure is IP20.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eIs it suitable for a motorhome or caravan?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The two-battery charging configuration is suitable for compatible mobile-home, motorhome and caravan systems where the controller’s voltage, current and environmental specifications are appropriate.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #00AAFF;\"\u003eWhat is the main advantage of the DUO version?\u003c\/h3\u003e\n\n\u003cp\u003eThe key advantage is the ability to charge two separate battery banks while programming how the available solar charge current is distributed between them.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2 style=\"color: #DD1D1D;\"\u003e☀️ SMART DUAL-BATTERY SOLAR CHARGING WITH LCD \u0026amp; USB CONTROL\u003c\/h2\u003e\n\n\u003cp\u003eChoose the BlueSolar PWM-DUO LCD-USB 12\/24-20 when you need a straightforward 20A PWM controller capable of maintaining two separate battery banks from one compatible solar installation.\u003c\/p\u003e\n\n\u003cp\u003eWith programmable dual-battery charge distribution, AGM\/GEL\/flooded\/LiFePO4 charging algorithms, three-stage charging, LCD monitoring, an included external temperature sensor and dual 5V USB outputs, it provides flexible solar charging for compatible boats, motorhomes, caravans and other auxiliary-battery systems.\u003c\/p\u003e\n\n\u003cp\u003eMatch the controller to the correct battery chemistry, solar voltage and system configuration for reliable 12V or 24V solar charging.\u003c\/p\u003e\n\n\u003c\/div\u003e\n","brand":"VICTRON ENERGY","offers":[{"title":"Default Title","offer_id":45326824767736,"sku":"SCC010020060","price":86.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/9230\/4632\/files\/1594041409_upload_documents_1600_640_q90-BlueSolarChargeControllerDUOLCDUSB12-24V-20A_top.png?v=1718327979","url":"https:\/\/www.homeof12volt.com.au\/products\/bluesolar-pwm-duo-20a-12v-24v-solar-charge-controller","provider":"Home of 12 Volt Northern","version":"1.0","type":"link"}