battery drain issue

[Maxim. 2]

Few users complained that their laptops that have been slept for some time(night mostly) were discharged for half battery capacity and even more. They blame antivirus for it.
I've done some experiment and noticed that MacBook Air that was left asleep for 24 hours lost about 65% percent of a charge. Without antivirus, for the same time, it lost about 20%.

Can we set up antivirus somehow that it wouldn't consume some much energy when a laptop is on battery?