The charge equalizer, also known as a even charger operates in a two battery 24 volt DC negative earth system
The Charge Equaliser balances the charge rate of two 12 volt batteries in series by monitoring the voltage at the terminals of the two batteries, and dividing the charging/discharging current equally between the two to ensure equal charging/discharging of both batteries.
It can also be used to maintain a charge in a separate 12 volt auxiliary battery Capable of 12v 30 amp continuous output
Current limited to prevent overloading
Note this is the 13.8 volt output model better for charging batteries
Yes charge your 12 volt house batteries from your 24 volt starting battery