Aaron Strange how it reached 30% target stop SOC 30 mins earlier?
Your battery (at 10.4 kW capacity) was 100% at start of export, and your max discharge is 3.6 kWh.
70% of 10.4 = 7.28
7.28 / 3.6 = 2.02 hours.
How did it reach 30% SOC sooner? Unless your SOC is inaccurate or battery capacity degraded?