AH! Figured it out. Apologies, was reading the graph wrong.

will build more solar fields. anyway to get this flagged as "I'm an idiot" so the devs don't get bothered with it?

Additionally, thank you all for your help!

it takes multiple days for them to fully charge, but for the most part they handle it fine between the nights where they suddenly drop.

But I will expand my solar fields and see if the problem stops.

the accumulators shouldn't need to be fully charged to work. partial charges that build over days ...

I have 160 accumulators set up to try to avoid dirty power and make sure I have energy for attacks if they happen (currently the haven't been). They are currently being powered by 100 or so solar panels (I'm working on expanding that).

During the night, when the accumulators are powering my base ...