I Don't read all the thread post but i have a question. How to reduce your electric bill but at the same time you frequently on your aircond. I just install 1HP aircond since January 2017 at my bedroom. At February,March i only pay RM30++ because i only set the temperate between 24-27 degree celcius. But when April's electric bill come, i shocked a lil bit because the bill shows RM90++ since i did'nt change the temperature. Fyi i only on my aircond at night only. So how to fix ?

January bill still RM30++. I've wondered if my aircond need to be service. I use SHARP Brand with inverter.