I've always been dissatisfied with the fact that solar power is the only option in the early and mid tech tree, and recently had this idea. This is very simple: a sealed unit that consumes the solid fuel it comes with, presumably liberating energy from the slow burn of a long coiled fuse, or something to that effect. A total of 4000 EC can be produced at the standard fuel cell rate of 1.5/s. After use the part can only serve as an inefficient battery, and is expected to be jettisoned or replaced