gwaring Flux is a slightly unusual tariff, because your cheapest grid import rate is always more expensive than your daytime export rate.
Your objectives should be:
1) minimise grid import, ideally none during the peak period
2) maximise self consumption
3) maximise export during the peak period
Check you have all the settings on this page correct, the daily use at the bottom of the page is important to you, as you'll be using this to help minimise grid import.
https://app.wonderwatt.com/settings
You want your batteries to charge from solar as much as you, rather than grid, and any xs will get used by the house or exported. Make sure in your Giv settings you have Eco ON.
Next, you want to create a peak export schedule. This is how you're going to maximise returns, something like this:
You may want to adjust these settings, depending on your evening consumption.
It's import to leave enough in your batteries to last at least until 2am.
I would suggest running washing machine, dishwasher etc either during the day when it's sunny, or during your cheap(ish) period.
Hope that helps a little.
If you're still struggling, it would help if you could tell us your inverter size/type and some info about your solar set up.
