> 400 milliwatts per square meter
About two orders of magnitude weaker than solar panels, even over 24 hours.
E = (T2-T1) / T2
>400 milliwatts per square meter of mechanical power with a potential for >6 watts per square meter.
Yes, but it works at night!
Not sure if you can get the MTBF on Stirling engines higher than on LFP batteries, though.
>400 milliwatts per square meter of mechanical power with a potential for >6 watts per square meter.