How To Cheat

Start any map, pause as soon as you see the energy bar. Use Cheat Engine to search for 100 as double, and select Rounded (Default). Spend around 5 energy and use decreased value, spend/gain ~5 energy and scan decreased/increased value, repeat until you have 1-2 values (real and on-screen). Change them to 100 or 200 if you have built a storage center, freeze the value(s) and use yur infinite supply of energy. The on-screen value may drop a bit, but that's because the game doesnt expect the value to be frozen.

How much energy does it take to build a blaster?

This will require a Cheat Engine, and it is recommended to pay attention to the tutorial that usually launches after installation.
Essentially, go to any (and I do mean any map) and pause it at any time. First put in the "Value" as what current energy that you have at the moment you paused and hit "First Scan".
Ok so we now have numbers! However there's too many to tell whats what, so: go back to the game and spend some of that energy for something and pause it immediately when the amount of energy has changed and put in the value what the new number is and hit "Next Scan"
Ok now we got less numbers showing up, but there's likely still too many to tell, so do the same thing again.
Now this is going to take some memory skills, you should look for Red texted numbers that show what the "value" is now, and the changed number that it was previously in "Previous" That there is what you are looking for!
Now click on that and then click on the "Value" down below and a pop-up will say "Change Value"
Insert how much you want, and return to the game and enjoy that incredible rush of "Energy"!