What did you do?
I changed the beacons to use four times the modules while reducing their distribution effectivity by a factor of four.
data.raw.beacon["beacon"].module_specification.module_slots = 8
data.raw.beacon["beacon"].distribution_effectivity = 1./16.

What happened?
The beacon tooltip ...

1. What did you do?
I created a mod with a new reactor entity.
energy_source =
{
type = "electric",
usage_priority = "secondary-input",
emissions = 0.0,
}


2. What happened?
Although the entity is connected to an electric network with enough power, it shows the "not connected to power ...