Renogy REGO 12V 40A DC-DC Battery Charger Multi-Stage for Lithium/AGM/Gel

About this item

• 𝐈𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭: 𝐀𝐥𝐭𝐞𝐫𝐧𝐚𝐭𝐨𝐫-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 – 𝐍𝐎 𝐬𝐨𝐥𝐚𝐫 𝐢𝐧𝐩𝐮𝐭. 𝐅𝐨𝐫 𝐑𝐕𝐬/𝐯𝐚𝐧𝐬/𝐛𝐨𝐚𝐭𝐬 𝐰𝐢𝐭𝐡 𝐚𝐮𝐱𝐢𝐥𝐢𝐚𝐫𝐲 𝐛𝐚𝐭𝐭𝐞𝐫𝐲 (𝐧𝐨𝐭 𝐟𝐨𝐫 𝐬𝐭𝐚𝐧𝐝𝐚𝐫𝐝 𝐜𝐚𝐫𝐬). 𝐔𝐬𝐞 𝟖 𝐀𝐖𝐆 𝐜𝐚𝐛𝐥𝐞 ≤ 𝟑𝐦 𝐟𝐨𝐫 𝟒𝟎𝐀 𝐨𝐮𝐭𝐩𝐮𝐭 (𝐥𝐨𝐧𝐠𝐞𝐫 𝐜𝐚𝐮𝐬𝐞𝐬 𝐬𝐡𝐮𝐭𝐝𝐨𝐰𝐧). 𝐁𝐓-𝟐 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐝 𝐟𝐨𝐫 𝐜𝐮𝐫𝐫𝐞𝐧𝐭 𝐚𝐝𝐣𝐮𝐬𝐭𝐦𝐞𝐧𝐭.
• 【Alternator Detection – Starter Protection】12V DC to DC battery charger features built-in alternator running detection, ensuring charging only occurs when the engine is running – protecting your starter battery from over-discharge. The charger instantly adjusts its mode during vehicle startup, guaranteeing no harm to your starter battery. For smart alternator vehicles, connect the included IGN signal wire for proper operation.
• 【4-Stage Smart Charging – AGM/GEL/Flooded/LiFePO4】 Renogy Rego DC battery charger delivers a complete 4-stage charging algorithm (Bulk → Boost → Float → Equalization) optimized for your battery type. The DC to DC charger 12V automatically selects the ideal profile via front-panel button. LiFePO4 batteries use Bulk + Boost only – float and equalization are disabled for lithium safety. LiFePO4 must have a built-in BMS.
• 【Compact Wall-Mount – Corrosion-Proof & Safe】Renogy Rego 40A DC-DC battery charger features a second-generation wall-mount design with corrosion-resistant construction – suitable for boat cabins and humid environments. Its internal layout keeps input and output terminals safely spaced to prevent short circuits. Note: Not waterproof – mount in a dry, shaded location away from water and direct sunlight.
• 【Complete Electronic Protection】DC to DC LiFePO4 charger adopts advanced protection against overload, short circuits, over-temperature, over-voltage, and reverse polarity. In high-temperature environments, it intelligently reduces output power for safe and efficient charging.
• 【Bluetooth Monitoring – BT-2 Sold Separately】Add the BT-2 Bluetooth module (sold separately) to adjust charging current, monitor real-time data via the Renogy DC Home app, and access up to 365 days of historical logs.