Price difference in flexible solar is astounding.

Hi all! Im trying to navigate buying panels to keep my 4 x 245 ah AGM house bank topped off and keep my fridge etc running on the mooring. I'm off of Lahaina so plenty of sun year round and am running day charters so should be used on the regular. Currently, I top up the batteries every couple days with the generator but would love to reserve that for running the air-conditioning. I had a bimini built and the canvas is about to be installed. The inverter store is offering 230 watt mono semi flexible pannels for 199.00 while custommarineproducts.com is offering 200 watt mono semi flexible pannels for 978.00. I kind of figure there are 3 big factories pumping these out and everyone is putting their stamp on them but maybe im wrong. Any advice would be great. Not many services over here after the fire and sailed to Oahu last week thinking i could go grab them off the shelf but west marine had 2 panels total in the whole store so... please advise. Many thanks Salty Dog Sailing Maui.