I'm pretty sure that at least some large satellites are deployed with their batteries charged so that they can initialize themselves, get their own attitude and position, and possibly establish some communication and even change their orbit without needing time to charge their batteries from the solar panels.
I remember reading that most cubesat launch providers have fairly strict rules about stored energy. Cubesats usually can't contain highly reactive chemicals, very strong and tightly wound springs, or fully charged batteries. Possibly even the real-time clock is not running?
Have I got this basically right?
Sherpa is a really interesting system. It carries a substantial supply of charged batteries. A good discussion of it's structure and operation can be found in this answer.
- Separation from the upper stage
- Power-up; avionic system initiated & start mission sequence
- 30 minute coast – no SHERPA activity
- Start payload deployment sequence
- 45 minute payload deployment time - detailed position/timing information of each event stored and relayed to ground
- Continue telemetry to ground until end of battery life approximately 10 hours post SHERPA separation.
Conceivably, Sherpa could pass a little bit of juice (electrical power, not Tang) to some of the cubesats, and even the correct time, position, and attitude of each deployment (but that's really a separate question). However I don't know if the cubesat standard even provides for the necessary electrical connections to do this, or if Sherpa can afford to give away much power.
So, Are cubesats deployed with fully discharged batteries? Even those on Sherpa?
note: Sherpa can host a variety of small satellite shapes and sizes. I'm primarily interested in the batteries of those that meet the cubesat standard, or are at least considered cubesats.