The longer the match progressed, the Silver Ferns went on to win the possession battle with 71 shots at goal compared to the Proteas 49 and can be satisfied with their first hit-out of the summer at the venue which will host the Netball World Cup in July.
Early defensive pressure helped the Silver Ferns get off to a flyer with Heffernan and Kelly Jury getting their hands on early turnover opportunities. Patience at the attacking end helped shooters Nweke and captain Ameliaranne Ekenasio hit their straps from the get-go to push out to a 10-3 lead.
The Proteas stormed back strongly to close the gap as the Silver Ferns forged a 15-11 lead at the first break.
Both teams retained unchanged line-ups on the resumption, a three-goal opening burst by the Silver Ferns producing the best of starts before the Proteas, once again, hit back with promise to hold the visitors in check.
Livewire little midcourter Bongiwe Msomi and ever-reliable shooter Potgieter were strong performers for the home side while towering young shooter Nweke, with a perfect 20 from 20 shots and defender Jury, with three intercepts, helped the women in black hit the main break with a 30-25 lead.
With only Heffernan (centre) and Nweke remaining on court, wholesale changes to the Silver Ferns did not detract from the job at hand.
Maia Wilson at goal attack and goalkeeper Sulu Fitzpatrick, with three intercepts, provided impressive contributions for the Silver Ferns during a powerful third quarter surge. Dynamic midcourter Peta Toeava made her first appearance in an offshore match for the Silver Ferns as the hosts wilted under the constant pressure.
With the change in personnel adding on-going impetus, the Silver Ferns restricted the Proteas to just five goals during the third term as they powered away to a 50-30 lead at the last turn.
In their second match, the Silver Ferns will square off against the Australian Diamonds at 5am (NZ time) on Monday.