I use their App, it's got two 'smart shift' settings.
A more conservative one that kind of acts like the Tesla app, avoids using the grid as much as possible but will export from the powerwall when the FIT prices are really good. (I haven't really tried this one so can't comment too much on it)
The other option is the Earnings Optimiser, which will be more active seeking arbitrage opportunities etc and will discharge the battery up to twice a day maximum (very rare). The algo seems to get better over time but you have full manual control to override anything it is doing and do your own thing which can help get you even better profits.
I have a referral code that'll give you $30 bonus if you try it out, I'll DM you with it.