Small cabin cooling: how many kWh does your AC use after sunset?

For those cooling a small off-grid cabin, how much electricity does your air conditioner actually use between sunset and bedtime, or overnight? I'm especially interested in measured kWh over a known number of hours, rather than its BTU rating or the compressor's nameplate watts.

For transparency, I maintain SolarCalc, a solar sizing tool. I don't have my own measured cabin AC dataset; I'm trying to understand where simple sizing assumptions miss real conditions.

Here is a hypothetical example to make the question concrete: an AC averaging 600 W over six hours uses 3.6 kWh. With an assumed 90% inverter efficiency and 80% usable battery capacity, that alone calls for 5 kWh of nominal battery capacity (3.6 / 0.9 / 0.8). That excludes other loads, inverter idle consumption, and a reserve for poor solar weather. It is not a claim that any particular AC averages 600 W, or a complete system design.

If you have readings, what were the AC model, cabin size and insulation, approximate outdoor temperature/humidity, indoor setpoint, and hours measured? Was the energy measured at the AC outlet or on the battery side? That distinction matters to avoid counting inverter losses twice.

Has shading, insulation, or cooling earlier while solar is available noticeably reduced your nighttime battery use? Even one hot evening's measurement with that context would be useful.