Check charging system

Got a new battery. Dc dc converter is like alternator anyone know crzz

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IF you would post - in plain English - what the trouble with the vehicle is - ‘perhaps’ we can help. Had a new dc dc converter put in....for free from honda america....dealer charged me for a new 12v n is saying it isnt ima battery. They say they need to contact honda anerica for diagnosis instructions...im wondering what else it cud be because i habe a copy of the federal emissions warranty sheet n i live in MA so im good

Im sorry i have a terrible phone. Ill rephrase short n sweet 'i mean that without any hostility.' I need help and are grateful for you taking the time.... Issue.... Check charging system. Light on....as a result car only drives on 12v battery.. What ive done so far Replaced 12v battery.. Brought car to a honda dealer since in america there is warranties for the hybrid parts of the car... As a result i got a new DC/DC converter put in for free.... apparently though the dealer is stumped as to why it keeps blowing a fuse... Dealers are shady out my way because they tried to make me pay for the services until i explained i had the emissions warranty sheet and knew what was covered. Car has been in a week at the dealer. So based on all that any ideas, suggestions, or anyone know the next diagnosis step so i can stay educated. Im a middle class hard working chef. Ive dumped thousands into this car. Itz my first finance and im stuck in it