Does the method you're using the wake the machines allow you to issue console commands after maintenance is complete?
If so, you can try issuing this command after everything is done:
%windir%\System32\rundll32.exe powrprof.dll,SetSuspendState Sleep
If the machine ends up going into Hibernate, you may have to turn it off.
Source: MS KB 555569
(article is for XP but I just checked on my W7 machine - probably works on W8 too)
2600K @ 4.8GHz; XSPC Rasa/RX240/RX120 Phobya Xtreme 200; Asus P8Z68-V Pro; 16GB Corsair Vengeance 1333 C9; 2x7970 OC w/ Razor 7970; Force GT 120GB; 3x F3 1TB; Corsair HX750; X-Fi Titanium; Corsair Obsidian 650D; Dell 2408WFP Rev. A01; 2x Dell U2412m