Renogy 12V 40A DC to DC On-Board Battery Charger Temperature Control?:No The DC-DC battery charger will

The DC-DC battery charger will charge your house batteries from the starter battery by 3-stage charging (Bulk

For a standard 400/450mm roof light you'll need 6 of these in total so that's why we sell them in packs of 6

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

Travel light with solar

8x Hinges

Renogy 12V 40A DC to DC On-Board Battery Charger Temperature Control?:No The DC-DC battery charger willCompatible 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