These are the best dc to dc converters I know of...you have to check them to see which ones will take the 24 and convert to 12...they are there. High quality, high efficiency.

https://samlexamerica.com/product-ca...e-converters/#



This one for example will take your 24 volts and output 12 volts at 8 amps...not sure how much you need...

https://samlexamerica.com/products/f...-idc-100b-12/#