UPDATE May 18, 2013
Sa mga nag tatanung about sa calculator, meron po akong ginagawang bago para po mas matulungan ko kayo sa pag compute ng submeter ninyo. Ito po ay maaring gamitin online or offline at pag sisikapan ko din po na magawa ang mobile version para po mas madali ninyong gamitin ang calculator na ito.
Maari nyo po subaybayan at mag bigay ng mga kumento sa ating official facebook page.
http://www.facebook.com/PinoyElectricSubmeterCalculator
offline
http://liit.co.nr/?teaf3
"how to compute sub meter in meralco"
common search in Google. I wrote an desktop application once and this application keeps history of your electric bills and also compute submeters.
Desktop version is also available. Download in my DropBox http://liit.co.nr/?1fi5r
a little story
Anyway .. I once had an internet cafe, and I am renting a small space, enough to fit 14 PCs. My main concern is electrical bill of course especially I am using a sub meter. I researched and I asked how to compute our bill but turns out that a lot of people are confused and asking the same. So I researched for more information and I stumble upon in Maralco site and they shown a way to compute submeters. I forgot the link and I cannot find it anymore though. Anyway, that gave me an idea how to compute and I wrote an app for it but never released to public but instead, I wrote a blog post about Disecting Electrical Bill and from my Google Analytics, it was regularly visited like everyday.
I decided now to write a simple Windows 8 metro application which computes sub meters and you can see the image preview above.
support
If you were not satisfied with the calculator or you think it's lacking something, kindly please email me your concern and feedback. The purpose of the application is to help you compute your sub meters so if you think it's lacking something, please let me know by sending me an email: jayson.d.ragasa@gmail.com
info about calculations
Here's a little info about the application which shows how those values are computed.
Click to show the larger picture (2275x715 resolution)
video
Confusions
I noticed there were some confusions about how things are computed, so I made another pictutorial how to compute your electric bill with submeters with two different meter setups
I'll try to update the calculator soon to support both setups. Currently, the calculator supports Setup #2