About these itemsCompatible with both lead-acid and lithium batteries, these DC to DC chargers work seamlessly with various alternator types. Ideal for RVs, trucks, and boats, they ensure efficient charging for standby batteries.Equipped with built-in protections including over-voltage, under-voltage, reverse polarity, and high-temperature safeguards, these on-board chargers deliver reliable and uninterrupted operation. Isolated input/output design prevents system interference.Featuring advanced multi-stage charging, these chargers support LifePo4 with 2-stage and lead-acid batteries with 3 to 5 stages depending on the model. This intelligent process optimizes charging and prolongs overall battery lifespan.Compact and practical, each unit is housed in a durable aluminum alloy case with pre-drilled mounting holes. This makes installation simple and suitable for different vehicle or marine setups, saving time and effort.Equipped with lithium battery activation, these chargers can revive idle or deeply discharged batteries. This function ensures your standby batteries are always ready, providing consistent performance when you need them most.Key DifferencesSDC-20A delivers 20A current, 250W output, supports 3-stage charging for lead-acid, and includes 2 fuses.SDC-30A provides 30A current, 375W output, supports 3-stage charging for lead-acid, and includes 3 fuses.SDC-40A offers 40A current, 500W output, supports 4-stage charging for lead-acid, and includes 4 fuses.SDC-60A is the most powerful with 60A current, 750W output, supports 5-stage charging for lead-acid, and includes 4 fuses.SpecificationsSDC-20AInput Voltage: 12VInput Battery Voltage Range: DC 8Vâ16VCharging Current: 20ACharging Voltage Range: 13.2Vâ14.7V (Lead-acid), 12.6Vâ14.6V (Lithium)Maximum Output Power: 250WCompatible Battery Type: Lead-acid & LithiumCasing Material: Aluminum AlloyOperational Temperature: 4â to 122â / â20â to 50âNet Weight: 2.65 lbs / 1.2 kgSDC-30AInput Voltage: 12VInput Battery Voltage Range: DC 8Vâ16VCharging Current: 30ACharging Voltage Range: 13.2Vâ14.7V (Lead-acid), 12.6Vâ14.6V (Lithium)Maximum Output Power: 375WCompatible Battery Type: Lead-acid & LithiumCasing Material: Aluminum AlloyOperational Temperature: 4â to 122â / â20â to 50âNet Weight: 2.65 lbs / 1.2 kgSDC-40AInput Voltage: 12VInput Battery Voltage Range: DC 8Vâ16VCharging Current: 40ACharging Voltage Range: 13.2Vâ14.7V (Lead-acid), 12.6Vâ14.6V (Lithium)Maximum Output Power: 500WCompatible Battery Type: Lead-acid & LithiumCasing Material: Aluminum AlloyOperational Temperature: 4â to 122â / â20â to 50âNet Weight: 3.31 lbs / 1.5 kgSDC-60AInput Voltage: 12VInput Battery Voltage Range: DC 8Vâ16VCharging Current: 60ACharging Voltage Range: 13.2Vâ14.7V (Lead-acid), 12.6Vâ14.6V (Lithium)Maximum Output Power: 750WCompatible Battery Type: Lead-acid & LithiumCasing Material: Aluminum AlloyOperational Temperature: 4â to 122â / â20â to 50âNet Weight: 4.33 lbs / 1.96 kgPackage ContentsSDC-20A1 x DC to DC Charger2 x Fuses1 x User ManualSDC-30A1 x DC to DC Charger3 x Fuses1 x User ManualSDC-40A1 x DC to DC Charger4 x Fuses1 x User ManualSDC-60A1 x DC to DC Charger4 x Fuses1 x User Manual40A
