As Amazon Fresh looms, Ocado aims to sell more tech than food

London

AT Ocado Group plc's warehouse in Hatfield, a half-hour north of central London by train, hundreds of red shopping crates wind their way through a labyrinth of conveyor belts.

The plastic crates make a series of pit stops where workers fill them with any of 45,000 different products in the warehouse: corn flakes here, oysters there, bananas farther along. The crated groceries are then loaded into vans in time to make it to homes across Britain within a one-hour window.

The sophistication of the operation has many inves…