{"product_id":"12v-40a-dc-dc-battery-charger-for-rvs-vans-boats-off-grid-systems-lithium-lead-acid","title":"12V 40A DC-DC Battery Charger for RVs, Vans, Boats \u0026 Off-Grid Systems | Lithium \u0026 Lead-Acid","description":"\u003cdiv\u003e\n\u003ch1\u003e12V 40A DC-DC Battery Charger for RVs, Vans, Boats and Off-Grid Systems\u003c\/h1\u003e\n\u003ch2\u003eEquipment Type and Primary Applications\u003c\/h2\u003e\n\u003cp\u003e12V DC-to-DC battery charger delivering up to 40A from a vehicle electrical system to an auxiliary battery. Designed for RV, camper van, boat, and off-grid power installations using AGM, flooded, gel, sealed, LiFePO₄ (LFP), or lithium-ion batteries.\u003c\/p\u003e \u003ch2\u003ePerformance Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInput: 12V DC nominal; 10–16V DC operating range.\u003c\/li\u003e\n\u003cli\u003eOutput: 500W rated power; 40A rated current; 37–43A operating current range.\u003c\/li\u003e\n\u003cli\u003eInput current limiting: ≤68A.\u003c\/li\u003e\n\u003cli\u003eCharging modes: 2-stage for lithium batteries and 3-stage for lead-acid batteries.\u003c\/li\u003e\n\u003cli\u003ePeak efficiency: \u0026gt;85% at 14V DC and 30% load.\u003c\/li\u003e\n\u003cli\u003eAlternator compatibility: smart and conventional 12V alternators.\u003c\/li\u003e\n\u003cli\u003eTemperature-adaptive charging is supported through an optional RJ11 temperature sensor for lead-acid batteries.\u003c\/li\u003e\n\u003cli\u003eDimensions: 10.3 × 7.4 × 3.1 in; net weight: 4.9 lb.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eSafety Features and Certifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBattery isolation prevents reverse current between starter and auxiliary batteries.\u003c\/li\u003e\n\u003cli\u003eOver-voltage, over-temperature, and reverse-polarity protection.\u003c\/li\u003e\n\u003cli\u003eD+ ignition control enables charging only while the engine is running.\u003c\/li\u003e\n\u003cli\u003eCertifications: CE and RoHS.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation and Maintenance Requirements\u003c\/h2\u003e\n\u003cp\u003eInstallation uses a 12V DC vehicle electrical system and D+ ignition control. Select the charging mode matching the connected battery chemistry, then connect the optional RJ11 temperature sensor when temperature compensation is required for lead-acid charging. Charger dimensions are 10.3 × 7.4 × 3.1 in; package dimensions are 13 × 9 × 5 in.\u003c\/p\u003e \u003ch2\u003eWarranty and Service Information\u003c\/h2\u003e \u003ch2\u003eBranding\/References\u003c\/h2\u003e\n\u003cp\u003eReference product: 12V 40A DC-DC Battery Charger for RVs, Vans, Boats \u0026amp; Off-Grid Systems | Lithium \u0026amp; Lead-Acid.\u003c\/p\u003e \u003ch2\u003eDifferentiators\u003c\/h2\u003e\n\u003cp\u003eSelectable 2-stage lithium and 3-stage lead-acid charging, combined with smart-alternator compatibility and D+ ignition control, supports mixed vehicle and auxiliary-battery configurations in one charger.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Rich Solar","offers":[{"title":"Default Title","offer_id":45362828116083,"sku":"RS-DC40","price":127.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/9969\/3939\/files\/RS-DC4040ADC-DCCharger_1.jpg?v=1789948124","url":"https:\/\/ampereauthority.com\/products\/12v-40a-dc-dc-battery-charger-for-rvs-vans-boats-off-grid-systems-lithium-lead-acid","provider":"Ampere Authority","version":"1.0","type":"link"}