"Electric charge not generated"

[BlockBoard]

How can I generate the electric charge to antenna?

[Starman4308]

Stock KSP has both solar panels and RTGs (Radioisotope Thermal Generators), although I don't think they're unlocked at the start. Before that point, many liquid-fuel engines generate electricity when running, though obviously that consumes a lot of LF+O and moves your craft.

Fortunately, in stock, I'm pretty sure antennae only consume electricity when transmitting science; so long as you're not reckless about turning your ship and transmitting science, battery life should be enough.

[bewing]

Welcome to the forums. Besides Solar panels, RTGs, and running your engines -- there are also Fuel Cells, that convert small amounts of fuel directly into electricity.

[Duck McFuddle]

You can attach some solar panels or RTGs to your ship, just make sure you have enough for what you are powering. 

[Xd the great]

Do you have decouplers in place?

@BlockBoard check for your resource flow.