This is largely out of date. They changed how power works a few years ago.

When i try to use it the reactor never activates when i test my ship and then it runs off battery power and never brings the reactor online to charge the batteries.

Trying it out on my new Tier 1 build. seems to be working ok. :)

Hmm I'm trying to use this, but when my reactor is off/not outputting, the battery array doesn't appear to supply power...any thoughts? Is there something I'm missing for changing modes?

Nice! This is the powergrid I always needed for my subs and edits!! Thanks a lot! You Rock !