I look forward to your next posts in the series! I'd start by skipping the inverter and using a car USB-C charger instead, then fussing with power settings to

I look forward to your next posts in the series! I'd start by skipping the inverter and using a car USB-C charger instead, then fussing with power settings to drive down the quiescent power of the laptop. Everything after that starts to feel like actual work, like changing the serving software or actively aiming the solar panel. You might be able to find some single board computer with a modern CPU and no graphics silicon whatsoever.