Q.Passionfruit Fruiting In Winter.
We planted a passionfruit vine and the following year we had a lot of fruit. The year after that we had 100’s of fruit. This year even more. They come all year round, but most are green coming into Winter. These don’t mature until early Spring, which means they stay on the vine for 5 mths. We run out of warm sunny weather for the fruit to ripen in 90 days. Why is my vine fruiting in Winter? And can I change it? We are in Nth Ca.

Certified GKH Gardening Expert
That is just the nature of how it fruits. Since you know that those fruits will not ripen, your best bet is to remove them. Doing so will help reroute that energy into roots and plant growth.
Here are some articles that will offer more information on the plant:
https://www.gardeningknowhow.com/ornamental/vines/passion-flower