Just bought a Dell TB16 dock with a 240w power supply for my Dell XPS 15 7590 for $85 USD. Im getting full charging capabilities and data transfer capabilities with just one
Dell Thunderbolt Dock TB16 K16A with Power Adapter HDMI VGA USB USB-C EA2405 | eBay
Dell Thunderbolt Dock TB16 K16A . | eBay
Dell TBDOCK-240W Thunderbolt Dock TB16 with 240 W Adapter - Black : Amazon.co.uk: Computers & Accessories