Apsia reads the power telemetry your satellites already send and tells you what will fail, when, and what fits in every orbit.
Scroll to fly into the shadow
Thousands of eclipses a year per battery. Which one fails first, months ahead, and what fits in every orbit.
Analyse a file, freeHow many years each array keeps its load on the worst day of the year, and whether there is energy for an extension or for the end.
See GEO and MEOKnow which satellite holds before you task it. On your own network, with nothing leaving it.
See government and defenceOne pass of a CubeSat, from public flight data. Half an hour without sun, on every orbit.