{"product_id":"solar-controller-charger-dual-usb-3a-step-down-module","title":"Solar Controller Charger – Dual USB 3A Step-Down Module","description":"\n\u003ch2\u003eSolar Controller Charger – Dual USB 3A Step-Down Charging Module\u003c\/h2\u003e\n\u003cp\u003ePower your devices anywhere the sun shines with this compact \u003cstrong\u003eSolar Controller Charger\u003c\/strong\u003e. Designed for makers, off-grid enthusiasts, and DIY electronics projects, this step-down charging module converts solar panel input into a clean, stable 5V USB output — letting you charge two devices simultaneously with ease.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Efficiency:\u003c\/strong\u003e Up to 92% maximum power conversion efficiency — squeezing every bit of energy from your solar panel for faster, more reliable charging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual USB Output:\u003c\/strong\u003e Two USB ports deliver up to 5V\/3A (MAX) combined output, so you can charge a smartphone and a tablet at the same time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Range:\u003c\/strong\u003e Accepts 6V–40V DC input via a 5.5×2.1mm barrel jack, making it compatible with a broad range of solar panels and DC power sources.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Portable:\u003c\/strong\u003e Measuring just 50×35×12mm and weighing next to nothing, this board slips into any project enclosure, backpack, or toolbox.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Compatibility:\u003c\/strong\u003e Works with smartphones, tablets, power banks, and any USB 5V-powered device.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Rated for –40°C to +85°C, so it performs in harsh outdoor environments without skipping a beat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6V – 40V DC (5.5×2.1mm port)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V \/ 3A (MAX)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e92% (MAX)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitching Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 × 35 × 12 mm (L × W × H)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed PCB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Solar Controller Charger Module\u003c\/li\u003e\n  \u003cli\u003e1 × Wire\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Actual color may vary slightly from images due to monitor calibration and lighting conditions. Please allow ±1–2mm tolerance in measurements.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What solar panel size is compatible with this solar controller charger module?\u003c\/h4\u003e\n\u003cp\u003eA: This solar controller charger accepts any DC power source — including solar panels — with an output between 6V and 40V DC via a standard 5.5×2.1mm barrel connector. Most 10W–100W solar panels fall well within this range, making the module highly versatile for DIY solar setups.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I charge two devices at the same time with this module?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The dual USB output supports simultaneous charging of two devices. The combined maximum output is 5V\/3A, so charging speeds may vary depending on how many devices are connected and the available solar input power.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this module suitable for outdoor and off-grid use?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The board is rated for operating temperatures from –40°C to +85°C, making it well-suited for outdoor, off-grid, camping, and remote DIY electronics applications. Its compact 50×35×12mm size makes integration into enclosures straightforward.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What solar panel size is compatible with this solar controller charger module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This solar controller charger accepts any DC power source — including solar panels — with an output between 6V and 40V DC via a standard 5.5×2.1mm barrel connector. Most 10W–100W solar panels fall well within this range, making the module highly versatile for DIY solar setups.\"}}, {\"@type\": \"Question\", \"name\": \"Can I charge two devices at the same time with this module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The dual USB output supports simultaneous charging of two devices. 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