I agree, but only because the exact same materials could be used to make a solar panel, and the two currently aren't even COMPARABLE in power generation.
The way it is now, you'll only get stable power generation in the post-game. During the 14 days the "advanced power generation" research tree is nothing but a big disappointment and you're better off just building two batteries and two biofuel generators and using that to hold your power supply up overnight.
Since this was here, let me ask this, is there a process to get the RTG to even work? I see that it puts out 5GEN at times, but it is very inconsistent, and from what I see it doesn't work at night what so ever.