{"product_id":"12v-20a-dc-to-dc-battery-charger-for-rv-van-boat-off-grid-lithium-lead-acid-batteries","title":"12V 20A DC to DC Battery Charger for RV, Van, Boat, Off-Grid | Lithium \u0026 Lead-Acid Batteries","description":"\u003cdiv\u003e\n\u003ch1\u003eEquipment Type and Primary Applications\u003c\/h1\u003e\n\u003cp\u003eThis 12V 20A DC-to-DC battery charger transfers energy from a vehicle’s 12V electrical system to an auxiliary battery at up to 20A. It is designed for RV, van, boat, and off-grid electrical systems 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; operating range 10–16V DC.\u003c\/li\u003e\n\u003cli\u003eOutput: 20A rated current; operating current range 18–22A; 250W rated output power.\u003c\/li\u003e\n\u003cli\u003eInput current limiting: ≤34A.\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\u003eCompatible alternators: smart and conventional.\u003c\/li\u003e\n\u003cli\u003eOptional RJ11 temperature sensor supports adaptive charging compensation for lead-acid batteries.\u003c\/li\u003e\n\u003cli\u003eDimensions: 8.4 × 7.4 × 3.1 in; net weight: 4.0 lb.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eSafety Features and Certifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBattery isolation protection prevents reverse current between starter and auxiliary batteries.\u003c\/li\u003e\n\u003cli\u003eProtection against over-voltage, over-temperature, and reverse polarity.\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 requires a 12V DC vehicle electrical system, connection to the auxiliary battery, and D+ ignition control. The optional RJ11 temperature sensor is intended for lead-acid battery charging compensation.\u003c\/p\u003e \u003ch2\u003eWarranty and Service Information\u003c\/h2\u003e \u003ch2\u003eBranding\/References\u003c\/h2\u003e\n\u003cp\u003eProduct reference: 12V 20A DC-to-DC Battery Charger for RV, Van, Boat, and Off-Grid applications. Package dimensions are 11 × 9 × 5 in, with a gross weight of 5 lb.\u003c\/p\u003e \u003ch2\u003eDifferentiators\u003c\/h2\u003e\n\u003cp\u003eSelectable lithium and lead-acid charging profiles, smart-alternator compatibility, engine-controlled activation, and optional temperature-adaptive charging combine in one 20A DC-to-DC charger.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Rich Solar","offers":[{"title":"Default Title","offer_id":45362828083315,"sku":"RS-DC20","price":95.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/9969\/3939\/files\/CD-20_12V_20A_DC-DC_Charger_20250806.jpg?v=1789948120","url":"https:\/\/ampereauthority.com\/products\/12v-20a-dc-to-dc-battery-charger-for-rv-van-boat-off-grid-lithium-lead-acid-batteries","provider":"Ampere Authority","version":"1.0","type":"link"}