thank you guys it really helped!

now i dont use that much coal in reality its nearly 0 fir steam engines

so i built some accumulator priority but it has a problem
power switch jumps from on and off like 3 times a second its like a infinite loop

i just did this:
https://imgur.com/a/UtY2sGH so yeah.. i want to do when energy is below 7.5k it will turn on steam engines while it will charge accumulators ...