I was reading up on various advanced space power sources such as solar cells and radio-isotope-generators (RTG); as well as their more modern counterparts, Advanced Stirling Radioisotope Generators (A-SRG). And yea, while I was reading I decided to compare a typical A-SRG to a 12 V car battery, because they seem to weigh about the same (20 kg).
Here's where things got complicated. I realized that every day electrical power sources (like chemical batteries) have a LOT of units used to describe them. There's volts, amps, ohms, and coulombs. Very few batteries offer up power (watts) or energy (joule) values.
I'm just wondering, why do space programs not give out any of these values for their space power sources? They seem to be more sophisticated, being all nuclear and stuff, yet they give us far less info. I'd be very curious to know the voltage or amperage of a typical A-SRG. (Or the coulomb even, but I only half understand that one...)