PowerNet rider Josh Atkins won last year's Tour, and Blackgrove thought having a team that knew how to defend the yellow jersey could prove invaluable.
The team time trial was a close affair, with PowerNet finishing narrowly ahead of Calder Stewart and Subway Pro Cycling. Blackgrove, while happy to be back in yellow, admitted there was a long way to go.
"It doesn't change much, it was only 4km in what is a long week, but it's a great way to open up the legs and get the nerves out of the system."
Fellow PowerNet rider Myron Simpson will go into stage one leading the under-23 classification, while Calder Stewart's Michael Vink picked up the sprint ace jersey.
Tour director Bruce Ross said this year's field signalled a "changing of the guard".
"There are some very good riders in this field," he said. "I think Blackgrove is looking good, he's had a pretty solid year by all accounts. The Bissell team, they're not coming here for a holiday and they are led well by Jeremy Vennell.
"There are some good development riders coming through and they are stamping their mark nationally and internationally, which is exciting. New Zealand is producing some good riders."