Okay, I think you're in a different part of the world to me, then - I can generate about 85kWh in a day here, mid-summer, about 34 degrees south, and that's throttled by my 10kW inverter.

I could go higher with a better inverter, but energy providers in Australia, or at least my part of it, basically drop all pretence once you go over 10kW feed-in, and the already pitiful rates they'll offer as standard asymptote towards zero.

Time of usage tariffs vary quite wildly here, but it's not uncommon to have close to 70c at peak hours, and 20c at off-peak. These fees are complicated by the daily connection charge, which is around $1.00 but varies on your location, provider, and your ToU and other schemes.

Some 'pretend to be a wholesaler' options exist here, but our wholesale pricing is bid and sold in 10m blocks, not 15m, as per your other note.

Also, we have ~6 hours a day where peak pricing is generally applied, and maybe ~9 hours where we're at off-peak pricing - so the math tends to be more compelling.