{"product_id":"12v-40a-dc-to-dc-battery-charger","title":"12V 40A DC-DC Battery Charger for RVs, Vans, Boats \u0026 Off-Grid Systems | Lithium \u0026 Lead-Acid","description":"\u003ch2 class=\"MsoNormal\"\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e40A DC-DC Charging: Delivers up to 40A charging current from a 12V vehicle electrical system to the auxiliary battery.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMulti-Battery Ready: Compatible with 12V AGM, Flooded, Gel, LiFePO₄, and Lithium batteries with selectable charging modes.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSmart \u0026amp; Traditional Alternator Compatible: Works with both smart and conventional alternators for reliable charging.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2-Stage \u0026amp; 3-Stage Charging: Uses 2-stage charging for lithium and 3-stage charging for lead-acid batteries to maximize charging performance.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBattery Isolation Protection: Prevents reverse current between the starter and auxiliary batteries.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eComprehensive Circuit Protection: Protects against over-voltage, over-temperature, and reverse polarity.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eD+ Ignition Control: Charges only when the engine is running to help protect the starter battery.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTemperature-Adaptive Charging: Supports an optional RJ11 temperature sensor for automatic charging compensation on lead-acid batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003eInput\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Input Voltage: \u003c\/strong\u003e12V DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage Range:\u003c\/strong\u003e 10–16V DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput current limiting:\u003c\/strong\u003e ≤68A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOutput\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Output Power:\u003c\/strong\u003e 500W\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Output Current:\u003c\/strong\u003e 40A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Current Range: \u003c\/strong\u003e37–43A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Compatibility: \u003c\/strong\u003eAGM, Flooded, Gel, Sealed, LiFePO₄ (LFP), Lithium-ion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGeneral\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharging Mode:\u003c\/strong\u003e 2-Stage (Lithium) \/ 3-Stage (Lead-Acid)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak Efficiency: \u003c\/strong\u003e\u0026gt;85% (@14V DC, 30% Load)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNet Weight: \u003c\/strong\u003e4.9 lb\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions: \u003c\/strong\u003e10.3 × 7.4 × 3.1 in\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications: \u003c\/strong\u003eCE, RoHS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions: \u003c\/strong\u003e13 × 9 × 5 in\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGross Weight: \u003c\/strong\u003e6 lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"United Global Solar","offers":[{"title":"Default Title","offer_id":53542294618293,"sku":"UGS-DC40","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1004\/6744\/1845\/files\/RS-DC4040ADC-DCCharger_1.jpg?v=1792241147","url":"https:\/\/unitedglobalsolar.com\/products\/12v-40a-dc-to-dc-battery-charger","provider":"United Global Solar","version":"1.0","type":"link"}