What is your source of power is that solar or it is residential Electricity?
What exactly are your current ASIC miners?
I think you better read this link below it should answer your needs if I'm right.
- https://bitcointalksearch.org/topic/first-timesmall-miner-reference-for-getting-started-4636521
If you are looking for profitable ASIC units today then check this one https://www.asicminervalue.com/
Thanks for your reply, this is really helpful. I currently have 22 S9J's and a whatsminer M20S so my plugs are 12 with 20amps circuit breakers. L7's seems more profitable but you never know what's going on with scrypt algo so i assume i'll stick with 140XP's.