Renogy 12V 40A DC to DC On-Board Battery Charger Temperature Control?:No This product has as built

This product has as built in Voltage Sensing Relay so will start charging your 2nd battery once the voltage from your alternator reaches 13

8x Hinges

the Voyager is engineered to be of world-class quality

overheat protection

High solar cell efficiency : Monocrystalline 18

Renogy 12V 40A DC to DC On-Board Battery Charger Temperature Control?:No This product has as builtCompatible Multiple Battery Types: Compatible with a multitude of alternator types, the DC DC battery charger offers correct charging for AGM, Flooded, Gel, and Lithium batteries. Smart 3 stage Charging: The DC DC battery charger will charge your house batteries from the starter battery by 3 stage charging (Bulk, Boost, and Float), to make sure it optimally and automatically charge to 100%. Various Protections For Ultra Safety: Offers Over voltage