Not sure what a drop shipper is..., Bimbles a company that originally ran festival bars, and then ran a festival bar with solar, they still do Glastonbury with a solar powered bar and sound system. They started to sell panels, and then the rest of the caboodle around it. Their customer service and deliveries always deteriorated towards festival season, to the point that it was hardly worth buying in June, July and August.
They are now much bigger, but customer service hasnt necessarily got bigger with it.
Yes, you can buy good stuff, yes, you can get kits, but just check the specs of the kits will actually work together safely rather than relying on their say so.