Submeter Concern - Mga Electrical Engineers, Help!!!

[sh1kamaru]

Nababadtrip lang ako sa landlord namin. Ayaw maniwala na may problema. Nakasubmeters kasi kami pero yung total reading sa meralco meter (nasa bill) is too high compared sa sum total ng submeter readings. around 120kWh ang difference. Tama ba yun?

[joma_s]

give us a descriptive picture of the installations. for example, from meralco meter, how many are submeters? how are the submeters connected to the main meter?

can you have picture as well?

[sh1kamaru]

Correction. Around 170 kWh pala ang difference. Maraming apartments po pero bigay ko lang yung sa row namin na may 10 apartments.

Apartments 1-5, may tag-isang submeter tapos may master meter which is the meralco meter.
Same is true with Apartments 6-10. 5 submeters again tapos may main meralco meter din for those submeters.

Yung landlord, sa ibang bahay nakatira at may sariling kuntador yun.

Nung dumating yung meralco bill para sa main meralco meter na naka-assign sa apartments 1-5, ang total ay 448 kWh.

Pero nung total ng may-ari ang konsumo naming lima, 275 kWh lang ang total. Sa isang buwan, eto ang reading:

Submeter 1: 88 kWh
Submeter 2: 68 kWh
Submeter 3: 68 kWh
Submeter 4: 6 kWh
Submeter 5: 45 kWh
Total: 275 kWh

Habang kasi lumalaki ang difference, lumalaki din ang multiplier namin (o per kWh charge) namin.

Bill: P5233.50
Multiplier: P5233.50 / 275 kWh = P19.03
Babayaran ko: 88 kWh x P19.03 = P1674.64

Whereas pag malapit lapit sa reading ng meralco ang total ng submeters (let's assume na 430 kWh), eto lang ang babayaran ko lang:

Bill: P5233.50
Multiplier: P5233.50 / 430 kWh = P12.17
Babayaran ko: 88kWh x P12.17 = P1070.96

Pero bago lumayo sa topic, ang gusto ko lang malaman muna e tama ba na ganun kalaki ang difference ng total ng submeters sa nakikita sa meralco meter?

Ang hinala ko, di calibrated ang mga meters o kaya e sira ang meter sa 4th apartment kasi for 1 month, 6 kWh lang. May electric fan naman sila, may TV, may ilaw. Possible din na di alam ng may-ari na may nakajumper sa connection naming lima o kaya, baka yung ilaw sa hallway e sa min pala napupunta ang konsumo.

[agave]

Short answer is no, if it is a simple split. Something is wrong, or it is not a simple split, or both.

In addition to the possible causes you mentioned, another is timing of the readings. Were the meters read at the same time, at both the beginning and end of the month or whatever the measurement period is? They should be read at the same time or within as short a time as possible.

Try doing readings over a shorter time period to measure and reproduce the discrepancy, like a few hours or one day.

To test whether hallway lights, etc. are being powered by a particular submetered circuit, turn off/unplug everything in that apartment and see what the submeter does when the hallway lights or whatever are turned on/off.

If shared devices like hallway lights, etc. are being powered by one or more submetered circuits, then there should be no discrepancy, but it could be unfair.

If shared devices are not being powered by any submetered circuits, then that would cause a discrepancy, but it could be fair for everyone to share in the cost of the 'discrepancy'. If shared devices are the only cause of the 'discrepancy', then computing each tenant's bill by Total Bill x (Tenant-KWh/Sum of Tenant-KWh) is probably the simplest way and more or less fair. In the example, P5,233.50 x (88/275). One problem with this formula is it has no fixed-charge component, whereas the total bill has fixed-charge components that should really be shared equally, not in proportion to individual consumption.

I'm curious to know how other apartments or submetered situations compute their tenants' bills.

[joma_s]

ang principle is what comes in = comes out (minus 3-5% for losses)

so sa case ng description mo, meron load na hinde namemetrohan. 170 ang difference, that is almost 2 apartment-load!

Hinde tama na ganoon kalaki ang descripancies

i would conclude the following;
- tama ka, all submeters to be calibrated.
- tama ka, possible na may jumper AFTER the meralco meter
- 4th meter is (not functioning properly)

You bring the matter to your landlord, along with your fellow tenants. Kung may mali - iko-correct, if may jumper, aalisin.

[sh1kamaru]

@ agave

Thanks. I want to make a correction though regarding sa first post ko. it's not that ayaw nila maniwala na may problema. di lang siguro nila gaanong naintindihan ang mga pinagsasasabi ko that after bring this matter up to them the last time, parang wala lang silang concern. ganun na naman ang nakita ko sa latest na computation for november consumption.

It is a simple split off. Di ko pa nakukuhanan yung sa latest na computation pero here is the proof of the computation from October:



First image is the meralco bill.
Total kWh = 419
Total charge = 4321.35



For the second image:
Note: Yung 8456.40 / 799 sa taas ng image is a part of the computation sa isang group naman ng apartment.

1. first column = previous reading
2. second column = the present reading that time.
3. third column = difference (may mali pa nga sa result for second apartment kung tutuusin pero napansin na nya at abonohan na lang daw nya since maliit lang naman)



The third image, shows the charge for each apartment after multiplying 16.18 to individual consumption. It is clear na based lang sa consumption naming lima ang computation.

Sana mali ako about the shared electrical devices kasi yung lights na sinabi ko, nasa tapat ng 8th apartment yun. kung ano ano na kasi iniisip ko na pwedeng panggalingan ng missing na kWh.

[sh1kamaru]

@joma_s

Thanks din ng marami sa yo.

i'd like to know sana if pareho kayong electrical engineers?

Here is the reason:

I was an ECE graduate and I also know know the basic concepts with regard to electricity. But since I am not an electrical engineer and I really don't know that much about submetering, i still don't have the guts para makipag-argue sa landlord namin.

Nung sinabi ko yang what comes in = comes out and that I understand the losses but it should be minimal lang, at sinabi ko na tinanong ko ito sa isang electrical engineer, ang sagot ba naman sa kin e mali daw ang electrical engineer na napagtanungan ko. Iba daw ang ikot ng submeters sa meralco meters. Para naman kasi sa akin at sa pagkakaalam ko, the submeter that we use is also designed to read in kWh and I don't see any reason how it could be any different with the meters used by meralco.

I started to have doubts na macoconvince ko yung may-ari at yung electrical engineer nya kaya I am gathering statements from electrical engineers to have enough grounds to back me up.

matanong ko na rin. di ko gaanong nakuha yung statement mo na possible na may jumper pero "AFTER" the meralco meter.

regarding sa 4th meter, are we in the same page na it's possibly not functioning properly dahil parang mahirap tanggapin na 6kWh lang ang consumed nila sa isang buwan?

at madagdag ko lang. kasi yung nagbabasa sa min, basta nagreread lang anyday siguro between the 28th to 30th or 31st of the month. di ba dapat sundin nila yung period na sinasabi sa meralco bill (e.g. 28th of previous month to 28th of current month)?

ang principle is what comes in = comes out (minus 3-5% for losses)

so sa case ng description mo, meron load na hinde namemetrohan. 170 ang difference, that is almost 2 apartment-load!

Hinde tama na ganoon kalaki ang descripancies

i would conclude the following;
- tama ka, all submeters to be calibrated.
- tama ka, possible na may jumper AFTER the meralco meter
- 4th meter is (not functioning properly)

You bring the matter to your landlord, along with your fellow tenants. Kung may mali - iko-correct, if may jumper, aalisin.

[real madrid]

nabasa mo ba ang sinabi ni agave tama yung explanaton nya its all about timing. tagalog na lang para magkaintindihan tayo. yung panahon na nag-reading ang meralco at sa panahon na nagbasa o nag-reading ang may ari ng bahay ay di sabay. kaya di pwedeng sabihin na dapat magpareho ang reading nila kasi di naman sila nag sabay. ang meralco di pareperehong date ang punta para mag-reading ang may-ari ng bahay ay may sarili syang date na sinusunod. kung uno ng bwan at katapusan mag-reading ang may ari ay yun ang ililista nya, at kung ano yung sisingilin ng meralco sa inyo yun ang papartehin nya sa iyo. kung ìpag pilitan mo na parehong reading ng meralco at ngmay-ari dapat same date eksakto silang mag-reading. kaya nga tig-isa kayo ng metro para may basehan ang may-ari sa sisingilin sa iyo hindi magic. kung same date silang dalawa nag-reading at di sila nagparehas ay problema kayo. dito pumapasok yung sina bi dito na AFTER the meralco meter, ito yung gumagamit sila ng koryente na di dumadaan sa meter nila direct sila sa meralco meter kaya sa meralco meter ang patak ng metro.

about sa sinabi sa iyo ng electrical engineer na di pareho ang ikot pwede din sabihing dahilan yun. now sabi mo ECE ka ngayon sabay kayong mag reading ang meralco sa loob ng tatlong bwan kahit di pa magkatugma yung reading mo then compute mo ratio ang proportion na lang para simpleng computation lang dapat magtugma yan.

simple lang naman na intindihin di kelangan ng electrical engineer.

[agave]

@ agave
It is a simple split off.

By 'simple split', I was referring to the way the Meralco meter and the submeters are wired. If the input terminals of the submeters are connected in parallel with the output terminals of the Meralco meter, and there are no other loads connected to the output of the Meralco meter, then it is a simple split. Otherwise, it is not.

You are not in a position to assert that it is a simple split because based on what you have said so far, you do not know how the wiring was done.

As far as non-submetered (e.g., shared) loads are concerned, did you ask the owner if there are any? Did you ask how the hallway lights, etc. are wired?

You can estimate the energy (KWh) used by a load by Energy = Power x Time. For example, if the hallway lights are 100 W total and are used 8 hr every day, then they would consume (0.1 KW)(8 hr/day)(30 day) = 24 KWh in one month.

The basic principle is conservation of energy.

It may help to think of electric wiring like water pipes, and electric energy like water. The electric meters are like water meters for measuring volume of water that has flowed past a point over a period of time. Electric power (watts) is like water flow speed (cubic-meters/sec). The meters behave like car odometers. You have to read all the water meters simultaneously, both at the beginning and end of a measurement period, otherwise the volume of water that you calculate (by taking the difference in 'odometer' readings) will be over different periods and cannot be compared or expected to 'add up'.

If the reading times differ by seconds or minutes, it probably won't matter so much. But if the mismatch is days, it probably will. It all depends on how fast the water is flowing and the consumption pattern.

There is no such thing as 'ibang ikot' of the submeters vs. the main meter. A meter is a meter. Either it measures energy accurately or it does not. (Sometimes, meters may have different 'multipliers' but I doubt that is the case here. Normally, meters for residential use have a multiplier of 1.)

One more possibility not yet mentioned is that the Meralco meter itself is inaccurate. Because this is a possibility, I suggest that you get help from Meralco. If they have good customer service, they should be able to help by 1) checking the accuracy of their meter and 2) giving expert/credible advice and explanations to you and the owner and the owner's engineer. They probably see this kind of dispute all the time and have experience in helping to resolve it.

I'm curious to know if Meralco offers checking/calibration of non-Meralco meters, either for free or for a fee. If not, who offers meter check/calibration service and for how much?

[joma_s]

@joma_s

Thanks din ng marami sa yo.

i'd like to know sana if pareho kayong electrical engineers?

Here is the reason:

I was an ECE graduate and I also know know the basic concepts with regard to electricity. But since I am not an electrical engineer and I really don't know that much about submetering, i still don't have the guts para makipag-argue sa landlord namin.

Nung sinabi ko yang what comes in = comes out and that I understand the losses but it should be minimal lang, at sinabi ko na tinanong ko ito sa isang electrical engineer, ang sagot ba naman sa kin e mali daw ang electrical engineer na napagtanungan ko. Iba daw ang ikot ng submeters sa meralco meters. Para naman kasi sa akin at sa pagkakaalam ko, the submeter that we use is also designed to read in kWh and I don't see any reason how it could be any different with the meters used by meralco.

I started to have doubts na macoconvince ko yung may-ari at yung electrical engineer nya kaya I am gathering statements from electrical engineers to have enough grounds to back me up.

matanong ko na rin. di ko gaanong nakuha yung statement mo na possible na may jumper pero "AFTER" the meralco meter.

regarding sa 4th meter, are we in the same page na it's possibly not functioning properly dahil parang mahirap tanggapin na 6kWh lang ang consumed nila sa isang buwan?

at madagdag ko lang. kasi yung nagbabasa sa min, basta nagreread lang anyday siguro between the 28th to 30th or 31st of the month. di ba dapat sundin nila yung period na sinasabi sa meralco bill (e.g. 28th of previous month to 28th of current month)?

Because you asked, I am sure I am an ElectEngr.

Meralco reading 448
Apartmt reading 275

By logic, unang magbabasa ang Meralco kesa sa LandLord. So by the time na magrecord si LLord, you expect na malaki kesa 448 ang reading mo, correct? But it is not. So, papaano ipapaliwanag ng LLord ang extra load?

Ang charge sa inyo ay MeralcoCharge/AptReading. Unfail yan, kasi naitatago na nya ang unexplained extra load. Dapat ang charge is (MeralcoCharge/MeralcoRead)xAptReading.

Its not ok to say you consulted with EE's kasi you cant bring them to the discussion table. You have to pick up the cudgel or bring someone who can sit with you and the Landlord.

[sh1kamaru]

@agave

pasensya na po. di ako EE at di ko alam na term pala yan na ginagamit sa wiring. namis-interpret ko lang yung simple split off na term nyo at akala ko e you are referring to the way our landlord divides the charges which is simply based sa nakikita sa submeter readings. my bad.

baka lang po mali na naman pagkaintindi ko. if it is not a simple split off, you mean it's a simple split off with other loads connected to the output of meralco meter, tama po ba?

basta tinanong ko na noon yung may-ari. may iba bang nakakabit sa meralco meter na possible na nagpapalaki ng reading ng meralco? o kaya baka may jumper?

ang sagot nya e kaming limang apartment lang kaya nga limang submeter readings lang ang nasa computation. di lang talaga daw pareho ang ikot ng submeters sa meralco meters kaya wala sila magagawa kung malaki man deperensya. in the end, kami pa rin ang kelangan magbayad kaya yung total ng submeters ang kinonsider nila sa computation. tinanong ko meralco, di raw nila hawak mga submeters.

di sinabi na may shared loads. sa linya naman kasi naming lima, yung mga ilaw sa labas sa tapat ng pinto namin e sa kanya-kanya din naming connection nakasakay. walang common electrical devices na pinakikinabangan naming lima.

*** ilaw na sinabi ko na baka nakasakay sa connection namin e sa isang tenant ata yun ng next group of apartments. di ko lang alam sure kasi nakabukas sya pag madilim sa tapat nila. di naman siguro sa ming lima ikakarga ng may-ari yun kung yung next group of apartments naman ang nakikinabang sakaling shared nga sya?

pumasok na din sa isip ko yang baka nagloloko ang meralco meter pero inisip ko na lang, di naman siguro. ang inisip ko na lang e yung mga nakita ko dito. like sa 4th apartment. August- 2kWh, Sept- 47kWh, Oct- 19kWh tapos *****, 6kWh lang ata ang nakita ko kasi nung november 23, check ko meter nika, 3.9 kWh pa lang ang nakita ko.

kaya balak ko din kuhanin ang contact number nung electrical engineer nya para malaman kung aware sya sa nangyayaring ganito. sa ibang shared apartments namin kasi, around 20-40kWh lang madalas ang difference e mas matataas pa nga kumunsumo yung mga andun.

pero sakaling simple split off nga, walang other loads or shared devices pero ganun pa rin kalaki ang deperensya. tapos sinabi ng meralco na wala problema sa meter nila. tapos ang reading schedule, 1 day lang ang difference. do i then have enough grounds para maconvince sila na may problema nga talaga sa submeters o baka may kumabit na sa output ng meralco meter namin na di nila nalalaman kaya ganun kalaki ang nakikita ng meralco?

[sh1kamaru]

@real madrid

nabasa mo ba ang sinabi ni agave tama yung explanaton nya its all about timing.

nabasa ko naman po. pasensya na lang po kasi i don't agree na it's all about timing. there are other factors.

tagalog na lang para magkaintindihan tayo. yung panahon na nag-reading ang meralco at sa panahon na nagbasa o nag-reading ang may ari ng bahay ay di sabay. kaya di pwedeng sabihin na dapat magpareho ang reading nila kasi di naman sila nag sabay...

...kung ìpag pilitan mo na parehong reading ng meralco at ngmay-ari dapat same date eksakto silang mag-reading...

linawin ko lang po. ang punto ko lang e bakit ganun kalaki ang discrepancy. na may problema na pag ganun kalaki ang discrepancy. wala ako sinabi at di ko pinagpipilitan na dapat pareho ang readings ng ganun ganun na lang. alam ko naman po na di magpapareho yun kung di sabay ang schedule ng pagbasa.

kaya nga may tanong po ako sa previous post ko about sa billing period na nakikita sa meralco bill. kung mas mainam bang sa ganung dates din magbasa ng submeters. kung ako kasi ang may-ari, pag submeters ang ipapagamit sa tenants, it comes with a responsibility. sabi nga ni agave:

"They should be read at the same time or within as short a time as possible."

kaso sabi mo iba iba ang schedule ng meralco meter reader kaya pwede na natin kalimutan ang ang topic about schedule ng reading. kaya ko pang tanggapin ang magiging discrepancies kasi it's within 10-30kWh lang naman siguro. but to a point na umabot ng 173kWH dahil lang sa hindi sabay ang reading, mahirap tanggapin yun.

about sa sinabi sa iyo ng electrical engineer na di pareho ang ikot pwede din sabihing dahilan yun.

malamang dahil di maayos o nagloloko ang meter. basahin mo na lang sinabi ni agave na tungkol jan.

now sabi mo ECE ka ngayon sabay kayong mag reading ang meralco sa loob ng tatlong bwan kahit di pa magkatugma yung reading mo then compute mo ratio ang proportion na lang para simpleng computation lang dapat magtugma yan.

simple lang naman na intindihin di kelangan ng electrical engineer.

again, di ko pinagppilitan na dapat exactong pareho ang readings. ang pinakagoal ko rito e ipakita sa may-ari, based sa mga statements ng mga nagcontribute ng opinions nila, na may problema kaya umaabot ng ganun kalaki ang diperensya. para umaksyon sila agad at ayusin ang problema. kasi ngayon, ang sinasabi lang nila e ganyan talaga, walang magagawa. na parang normal lang na ganun kalaki ang discrepancies.

[sh1kamaru]

Because you asked, I am sure I am an ElectEngr.

Meralco reading 448
Apartmt reading 275

By logic, unang magbabasa ang Meralco kesa sa LandLord. So by the time na magrecord si LLord, you expect na malaki kesa 448 ang reading mo, correct? But it is not. So, papaano ipapaliwanag ng LLord ang extra load?

Ang charge sa inyo ay MeralcoCharge/AptReading. Unfail yan, kasi naitatago na nya ang unexplained extra load. Dapat ang charge is (MeralcoCharge/MeralcoRead)xAptReading.

Its not ok to say you consulted with EE's kasi you cant bring them to the discussion table. You have to pick up the cudgel or bring someone who can sit with you and the Landlord.

Thanks joma_s. ang sarap pakinggan ng sagot mo about how they should charge us. I understand that consulting with EE's is not enough kasi pwede nila sabihin

"naniwala ka dun e pwedeng nagpapanggap lang na EE yung sumagot sa yo"?

but I hope na pag pinakita ko itong usapan natin sa electrical engineer ng may-ari, maconvince ko sya at mapaliwanag nya sa may-ari na may problema nga.

pero if yung electrical engineer mismo ang magpilit na tama lang yan, normal lang yan, wala magagawa, etc., is there a body, a government unit or offical association of electrical engineers where i can report this case to?

[joma_s]

Thanks joma_s. ang sarap pakinggan ng sagot mo about how they should charge us. I understand that consulting with EE's is not enough kasi pwede nila sabihin

"naniwala ka dun e pwedeng nagpapanggap lang na EE yung sumagot sa yo"?

but I hope na pag pinakita ko itong usapan natin sa electrical engineer ng may-ari, maconvince ko sya at mapaliwanag nya sa may-ari na may problema nga.

pero if yung electrical engineer mismo ang magpilit na tama lang yan, normal lang yan, wala magagawa, etc., is there a body, a government unit or offical association of electrical engineers where i can report this case to?

Sa DTI ang likely na tutulong. Or any consumer-right group. Im not saying that my analysis is correct. Kung andyan ako, I will check the installation visually. The descripancy is tremendous. Ang sabi nga ni agave, a meter is meter. In the beginning, if Im the owner, I would not let a submeter read LESS than what its supposed to be (read 200+ while input is 400+).

I am likely to believe that there is a jumper, kaya ang recorded sa Meralco is big while the sum of 5 is less.

Ano say ng co-group mo?

[sh1kamaru]

Sa DTI ang likely na tutulong. Or any consumer-right group. Im not saying that my analysis is correct. Kung andyan ako, I will check the installation visually. The descripancy is tremendous. Ang sabi nga ni agave, a meter is meter. In the beginning, if Im the owner, I would not let a submeter read LESS than what its supposed to be (read 200+ while input is 400+).

I am likely to believe that there is a jumper, kaya ang recorded sa Meralco is big while the sum of 5 is less.

Ano say ng co-group mo?

Thanks. I understand if you'd say your analysis may not be correct kasi mahirap magconclude kung ano ang reason behind the discrepancies if di mo pa nakikita ang installation.

Di ko pa kinakausap co-groups ko about this kasi ayoko i-question nila yung may-ari dahil lang sa na-bring up ko sa kanila ang tungkol dito. siguro they just pay their bill and that's it. either they don't know kung tama pa ba ang binabayaran nila o sobra na or wala lang sila pakialam. pwede ring nagtitiis na lang sila kasi di nila alam kung bakit mataas ang binabayaran nila.

Nagpapasalamat ako sa inyong lahat for your inputs. Ang importante e we all agree na what comes in equals what comes out and that a meter is a meter at di na pwedeng ikatwiran ng may-ari na mabagal ang ikot ng submeters kaya mababa ang reading. Mapapa-isip na sya kung ano nga ba ang dahilan bakit ganun kalaki ang discrepancy. kaya ko pang tanggapin kung ang discrepancy e mababa dahil lang sa losses at reading schedules.

[joma_s]

Your are welcome. Sana maayos mo ang gusot.

Heto ang isang paraan ng pag-check

On a particular day, i-o-off nyo ang bawat meter, sabay-sabay. Kadalasan, meron disconnect switch ang linya bago kumunekta sa sub-meter.

Sabay-sabay na off. Then tignan mo kung umaandar ang main meter. Kailangan discreet lang.

If the meralco meter stopped, then okay ang installation - ang mali ay elsewhere. If the meter keep on running, alam mo na. 15 min test lang yan or even less.

[swimbod21]

Ditto! If all else fails sa mga above suggestions regarding meter tests then sa malamang may nakajumper and most likely yung landlord mo rin yun

[happydude]

Nababadtrip lang ako sa landlord namin. Ayaw maniwala na may problema. Nakasubmeters kasi kami pero yung total reading sa meralco meter (nasa bill) is too high compared sa sum total ng submeter readings. around 120kWh ang difference. Tama ba yun?

bossing,
di po ako electrical engineer, pero meron kami paupahan, common problem ito, sakit ng ulo ng nagpapaupa at nangugupahan.

meron po kasi bracket sa billing ang meralco, na kapag tumaas ng ganito/etc ang kwh mo, may mga extra charges na. na pinagmumulan ng questions ng mga nangungupahan, kasi ang nasa isip nila, kung ano lang ang lumabas sa submeter, divide lang sa main, pero sana nga ganun kadali yun.

ang solution namin, tanggalin ang mga submeter at kabitan sila ng tig-iisang meralco meter bawat unit, ayun, masaya sila, lalo na yun mga unit na konti lang ang kuryente na ginagamit, nagkakaroon pa sila ng discount sa meralco, minsan, 100pesos lang ang binabayaran nila sa isang buwan.

kaya suggestion ko sa iyo, magpakabit ka na rin ng sariling metro, sabihin mo sa landlord mo, abonohan mo muna ang bayad sa meralco meter, bawasan na lang sa mga future payment mo sa rent. kung responsable landlord yan, papayag yan.
kapag di pumayag, hanap ka na lang ng ibang apartment na may sariling metro ng tubig at kuryente.

[joma_s]

the best alternative ang suggestion ni happydude

[sh1kamaru]

bossing,
di po ako electrical engineer, pero meron kami paupahan, common problem ito, sakit ng ulo ng nagpapaupa at nangugupahan...

tama ka po. may mga extra charges nga. ang kaso lang sa min e, kami rin ang nagbabayad nun. walang problema sa paghahati-hati ng extra charges. ang nagpapalaki lang talaga ng charge e yung discrepancy.

sample:

meralco charge: P5000
total kWh ng meralco meter: 500kWh

ideally speaking, pag tugma ang total ng meralco meter sa total ng mga submeters, ang per kWH charge is:

P5000/500kWh=P10. kahit anong bracket pa yan, kasama nang pinaghatian sa computation yung extra charge kasi P5000 na ang dividend natin which is yung mismong total charge na nakalagay sa meralco bill.

Apt 1: 100kWh
Apt 2: 100kWh
Apt 3: 100kWh
Apt 4: 100kWh
Apt 5: 100kWh

100kWh x P10= tig P1000 lang dapat. kung di maayos magbasa ang isang metro, sabihin nating yung first meter e 50kWh lang ang nagregister tapos the rest, 100kWh pa rin, eto ang ginagawang computation sa min:

P5000/450kWh=P11.11

let's say yung ibang meter din e di maayos at umabot ng 200kWh ang discrepancy, that's P5000/300kWh=16.67

kung sakaling room 5 lang ang tama ang reading at 100kWh yun, multiply by P16.67 = P1667 at sa meter na di functioning properly na let's say 50kWh lang ang nagregister. multiply it by P16.67 = P833.50. very unfair kung ang ang pinakareason why sobrang laki ang discrepancy e dahil sa may mga sakto at merong mga di saktong magbasa na submeters. marami pa namang ibang pwedeng maging cause pero kung sa scheduling lang ng readings at sa losses, para sa kin, up to 50kWh na discrepancy is matatanggap ko pa.

tama lang ang ginawa nyo na ipaconvert sa meralco meters para siguradong fair ang bayaran.