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 Electricity consumption, Query

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weikee
post Jul 7 2015, 03:02 PM

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QUOTE(ajai@jakes @ Jul 7 2015, 12:31 PM)
EDITED TO ADD WATER HEATER

Hi guys,

Need so input on electricity consumption. I just got my TNB bill and it costs me RM710.40 from 15 May to 15 June. What did I use that could make my bill go so high? Previously, in my old condo, my average bill was RM350.

Back ground information.

I just moved to alam impian in April
It is a 2 story intermediate.
Major electrical items:-

York inverter aircond 1hp x 3 sets = I only use 2 air conditioners from 10pm to 8am (10hours) and from 2pm to 4pm(2 hours) at temp 26c at the lowest fan.
Acson normal aircond 1hp x 2 sets = hardly use
Acson normal aircond 2hp 1 set = hardly use
Grundfos water pump 1.5hp = 1 set which I keep on 24 hours 7 days a week
Electrolux clothes dryer = +/-6 hours a week
Rubine brand built in oven which I use +/-5 hours a week
Rubine brand hood which I use everyday for +/-3 hours a day
Deep oil fryer (no brand) which I use +/- 1 hour a day
LCD 50 inch tv which is kept on from 8am to 10pm (14 hours) everyday (kids)
KDK ceiling fan I use 1 which is kept on from 8am to 11pm (15 hours)
Toshiba 700liter inverter fridge

FORGOT TO ADD:-
1 STORAGE WATER HEATER 35 LITERS
1 STORAGE WATER HEATER 50 LITERS
BOTH USED SPARINGLY

Those I think are the major electrical items which I use daily.
As for the lights in the house, I use 18watt LED downlights for the whole house.

Please help. I need to figure out what is causing such a high electricity bill.

Ajai@jakes[I]
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Lets convert to daily usage

- 2x1hp, x 12 hours usage, assuming you are using 0.4 (assuming 60% the time is off), and ac is 900watt = 8.6Kwh / day
- Grundfos, how long it usually run? Lets assume you run 1.5 hours a day. That about 700Watt * 1.5 = 1.05 Kwh / day
- Cloth dryer, what is the model? Lets assume is 2,200 Watt. you use 6 hours a week. = 6 x 2,200 / 7 = ~1.9Kwh / day
- Oven, what is the wattage? assume 2,200 watt. = 5 x 2,200 /7 = ~ 1.58Kwh / day
- Cooking, what is the wattage? how many burner you use? Lets assume average is 700watt per hours, = 700 x 3 hours = 2.1Kwh / day
- Oil fryer? how many watt? These stuff usually > 1,000 watt. Assuming is 1,00 watt. use use 1 hours. = 1kwh / day
- LCD x 14 hours, assume is 50 watt x 14 = 0.7Kwh / day
- KDK Fan, 15hours x 30watt (assume) = 0.45 Kwh / day
- Storage heater, lets assume you use total of 1.5Hours a day in total of 2 storage = 1.5 x 3,000 watt = 6.0Kwh / day

That already using 23.38 unit per day. Yet to include your fridge, lights, computer, charger, Water boiler?

If your A/C are in open area, meaning it will run longer, can be running 100% all the time too.

Did you switch off the heater when not use?

And how many burner did you wife / maid use during cooking? more burner mean more electricity.


weikee
post Jul 7 2015, 03:05 PM

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Remember, convenient and comfort come with cost.

You can first cut the use of dryer, that is one, and start switching off storage heater when not use. Also reduce the A/C usage. It help keep you healthier too.
weikee
post Jul 7 2015, 04:06 PM

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QUOTE(ajai@jakes @ Jul 7 2015, 03:52 PM)
yup. that is correct. I checked with my seller zheine from builders hardware on the grundfos usage.
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Too much of switching on and off is also wasting electricity. Pump start stop use more energy vs constant running. A pump that run 60 mins non stop use less energy than a pump that run 1 min, stop 1 min for 60 cycle.
weikee
post Jul 7 2015, 04:13 PM

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QUOTE(ajai@jakes @ Jul 7 2015, 03:40 PM)
Hi Wei Kee,

My inverter air conds are all in the bedrooms whereas my non inverter air conds are in open spaces like living room and dining room. my bedrooms are +/-250 square feet, hence I am assuming the York inverter 1hp should suffice. I am using the inverters in the bedrooms on a daily basis for about 12 hours a day.

as for the storage water heater, I only switch on when I intend to use and will switch off after taking a shower. it is never on 24 hours 7 days a week.

the only item which is switched on 24 hours 7 days a week is the grundfos water pump. but the water pump, after talking to zheine, only switches on when the taps are open and will auto switch off when the taps are closed.

in terms of burner, my hob is a 3 burner but uses gas, not electricity, so I do not think there is any electrical consumption going on.

My lights are the square 6 inch LED 18 watt downlights. I have about 30 plus but I don't switch on all of them at the same time.

What can I do to cut down my RM710 tnb bill?
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250sqft with 1 hp? Underpower lah. My master bedroom is 20x12, and using 1.5hp. Just ok only.

Ignore the stove, since is using gas.

Also hood also take up some consumption. Hot water? Especially Instant Hot water dispenser take lots of usage too.

Vacuum cleaner?

weikee
post Jul 7 2015, 04:15 PM

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QUOTE(ajai@jakes @ Jul 7 2015, 04:12 PM)
I cant do much about this Wei Kee as the grundfos pump is designed that way. everytime a tap opens, the pump switches on. everytime a tap closes, the pump switches off.

For example, when I open the tap to wash my hands, I can hear the pump switching on and when I close the tap, I could hear the pump becoming silent.
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For me, i usually switch it off, until need to use like bath, and wash toilet. Don't need to use pump just for washing hand right? or bidet? Problem i faced when the pump remain on for long is the hose also burst. Frequently switching off actually save more money because less replacement of hose, and electricity.
weikee
post Jul 7 2015, 04:25 PM

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QUOTE(ajai@jakes @ Jul 7 2015, 04:18 PM)
I supplement the York inverter 1hp aircond (26c and lowest fan) by using the normal ceiling KDK fan.
the hood is a 1500 watt hood. I guess you are right. that would take up electricity especially if I use it all the time for cooking.
no instant hot water dispenser. I do have those electric kettles plus a deep oil fryer. both of which I think takes up a lot.
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Maybe is only me. I find the room cooler without Fan.
weikee
post Jul 7 2015, 04:26 PM

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QUOTE(idoblu @ Jul 7 2015, 04:24 PM)
i think my biggest makan letrik appliance is the aircon
then comes the washer/dryer
fridge is next

but man i wish i can on all my aircon 24x7 for a fixed amount of money macam all you can eat buffet
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Hmm... Possible but not in legal wah cool2.gif
weikee
post Jul 7 2015, 05:05 PM

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QUOTE(ajai@jakes @ Jul 7 2015, 04:34 PM)
you have a point here. but the thing is, the air conditioners are only switched on at night from 10pm onwards, I doubt whether the heat from the sun could result in the room being difficult to cool down at 10pm at night. but I could be wrong.
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The heat build up in the room during day time will need some energy to cool it down. For me, I have a ventilation fan that usually switch it on to suck the cooler air from outside to my room, than to the roof. This way I cool the roof, and also cool the room before switching on the AC.

If rainy season, I just switch on the open up the windows, Vent + Fan, this will be very cooling.
weikee
post Jul 7 2015, 05:11 PM

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QUOTE(ajai@jakes @ Jul 7 2015, 04:31 PM)
same here. I think the biggest culprit is the aircond. I am trying to figure out how to manage it.
the dryer not so bad not since I am on landed property so usage have cut down by 90%.
Fridge only 1 700+ liter fridge. but inverter tech.
I will have to monitor my meter lah like this.
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Inverter or not, if its open frequently it will take up energy. 700L is consider a big fridge.
weikee
post Jul 7 2015, 05:46 PM

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QUOTE(idoblu @ Jul 7 2015, 05:25 PM)
mine cannot do la.... blush.gif
500L fridge ok or not? i can't seem to find how much my fridge consume

one thing about LED bulbs, I tend to leave it on nowadays thinking "aiyah its only 7 watt each"  blush.gif
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Tak tahu tuan. Semak menu smile.gif

7x744=5208

This post has been edited by weikee: Jul 7 2015, 05:50 PM
weikee
post Jul 7 2015, 06:09 PM

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QUOTE(billylau @ Jul 7 2015, 05:59 PM)
Last month 1813 kwh, RM916.92..
I was suspecting it is my York inverter aircond, the compressor broke down 3 months back, and despite that I still turned it on, and it was not really cooling, so I had to turn on like 24 hours. Do you think this is the culprit?

I do have 5 adults living in the unit tho. 1 being my maid. But on weekdays, all 4 of us are not at home till 5pm onward.
Things that 24/7 on are my wine chiller, fridge, water dispenser(coway).
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24hours Ac, what's temperature setting? And HP?

Depend of your Ac running non stop because of setting or is really the faulty unit.

This post has been edited by weikee: Jul 7 2015, 06:11 PM
weikee
post Jul 7 2015, 07:15 PM

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QUOTE(billylau @ Jul 7 2015, 06:42 PM)
2.5 hp, setting at 18 celcius, and it just blowing wind. not inclusive gst.
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18c sure lah. How can you achieve 18c, even inveter will run forever. Usually 23 is good. If run full-time for a month, you for to pay almost 700 bucks.you running server room?

If only blowing wind, not cool air very likely gas not enough. Time to service and check.
weikee
post Jul 7 2015, 08:38 PM

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QUOTE(idoblu @ Jul 7 2015, 08:30 PM)
if blowing air only, most of the time its the capacitor. got one big ass cap at the compressor end that kicks start the compressor.
if service men sure charge Rm250 to fix. I go buy from aircon shop only like Rm12. I then call the service people to clean my aircon. pay them 60 to clean and replace the cap for free.  laugh.gif
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If cap faulty, compressor won't run and will not drain energy.
weikee
post Jul 7 2015, 08:41 PM

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QUOTE(nanan75 @ Jul 7 2015, 08:33 PM)
something with digital tnb meter causing high reading or is it just me?  the reading keep increasing with same numbers of appliances, over time. 

Anyway to check the tnb meter calibration?  Im on ~700-750kWh per month and its already painful.  Big ticket items are 2.0hp and 1.0hp normal Daikins each 5hrs per night.  Others are per normal people.
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Not really, mine using digital almost 4 years, reading always the same.
weikee
post Jul 7 2015, 08:46 PM

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QUOTE(idoblu @ Jul 7 2015, 08:24 PM)
my room aircon 2HP i put 26C also cold like anything
my living and dining room also i put 24C only

mine are panasonic inverters given by the developer. recently both my living and dining aircon leaking gas. when the two indons (developer side) came and service, they told me must set it to 16C then only cold. i said you gila ka? mau saya jadi ais batu?" And they set everything to Auto (louvers, fan speed etc) - the cold air takes damn long to come on
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No way to reach 16c if sizing are correct or just bit oversize. Unless outside is super cold like <24c, and room are seal tight.
weikee
post Jul 7 2015, 08:53 PM

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QUOTE(idoblu @ Jul 7 2015, 08:51 PM)
i know no way, but these buggers set it to 16C so it gets the coldest and I don't complain them lor.
btw i use this Econavi thing. It can detect where you are and got activity or not etc and then adjust the settings accordingly. see la my next month bill how

my induction, oven and hood not use yet summore.
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I switch off that function. If sleep it didn't detect movement it increase the temperature at least 2points. Making my room stuffy.
weikee
post Jul 7 2015, 09:00 PM

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QUOTE(idoblu @ Jul 7 2015, 08:55 PM)
i think it detects infra red as well not only movement
so far mine ok with econavi turn on
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Mine, nope. It make room stuffy.
weikee
post Jul 8 2015, 08:19 AM

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QUOTE(MonsterPips @ Jul 8 2015, 07:38 AM)
Do note that tariff increase exponentially. If aircond consume 100kwh and heater also 100kwh,but when total up, you have to pay differently.
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Kawan, yours is old rate.

New Rate is on the Right side. http://www.tnb.com.my/residential/pricing-...riff-rates.html
- 301Kwh - 600Kwh is RM 0.516 + 6% GST
- 601Kwh - 900Kwh is RM 0.54.60 + 6% GST


weikee
post Jul 8 2015, 08:21 AM

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QUOTE(kimsim @ Jul 8 2015, 08:07 AM)
Like s'pore would be different all flat charge
                                                                           
                              Bill Summary Jun 2015                             
Your current account balance of $150.21 will be due on 14.07.2015               

  Usage Comparison
                        Your Usage                All Neighbours            National Average       
                                                  Usage*                    Usage**                 
Electricity Usage      470 kWh                         
Water Usage            16.5 Cu M                     

We have 3 units Aircon for 1hp x2 units turn on 8 hrs per night, also 1.5hp for around 5 hrs per dally.
Water storage tank 25L turn on around 3-4 hrs per day, dryer heat pump daily + FL washer daily + hair dryer + Pana inverter fridge 600L & the rest bla bla.

Actually like auto gate non DC & water pump + 2.5hp Aircon may cost you more than average usage
Also non LED lighting too
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Autogate don't use much electric, where you get the autogate uses lots of energy? A backup battery can last up to 2 days, if it eat energy, you need a car battery for it.

Non LED, CFL is way better efficiency compare to LED. Lumen / Watt, LED no where close to CFL. And did you factor in Switching power losses?
weikee
post Jul 8 2015, 08:33 AM

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QUOTE(kimsim @ Jul 8 2015, 08:27 AM)
Not too sure my close to 10 yrs old auto gate non DC type may drink more energy, has few time the fuse broken end out put few copper wires added for extra power, till now never broken fuse already.

If not mana boreh tahan, each time come to servicing and pay for Rm80 just change fuse only
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That is motor issue, noting to do with AC or DC autogate, even DC if motor have issue you will blow the circuit board. My mom house using AC sliding Autogate with two AC motor. Everyday using so many round no issue, and hardly notice any high consumption.

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