Planning a 100% off-grid build with the Delta Pro Ultra — Advice on sizing/solar? 🔋🇦🇺

Hey everyone! I’m currently planning out a complete off-grid setup for a project here in Australia and have my eyes firmly set on the Delta Pro Ultra system. I’m looking at starting with a 24.5kWh to 30kWh battery capacity bank coupled with a hefty solar array to keep it completely self-sufficient.

Since I haven't pulled the trigger on the purchase just yet, I wanted to lean on the community's real-world experience:

1. For those running completely off-grid, how has the system handled consecutive heavy overcast or stormy days? Are you relying much on a dual-fuel generator backup?

2. What solar panel configurations (fixed rooftop vs. ground mounts) have given you the best daily yield to top up a bank this size?

Would love to hear any tips, hidden installation lessons, or photos of your setups before I make the investment. Thanks in advance for the help!