Electricity Saving Tips For Homes And Offices

Team

Abhishek Jain

Abhishek worked with Deloitte Consulting for almost 10 years before starting Bijli Bachao. During his stint with Deloitte, he managed several large scale business transformation projects with various Fortune 500 companies with work spanning multiple countries and continents. A technology enthusiast, amateur photographer and musician, he likes doing everything creative. He got interested in electricity savings when he came back from US and started setting up his house in India. Rising electricity costs in Mumbai and high consumption by neighbours got him thinking that there is lot of scope of helping others reduce their electricity bills. He also realized that by helping others reduce electricity bills will also do well to environment. He thereby decided to use his technology skills to help people reduce their electricity bills. Abhishek graduated from IIT Bombay with B.Tech in Chemical Engineering.

Along with Bijli Bachao, he is also part of two more initiatives: Villcart (www.villcart.com) where the team works towards generating sustainable livelihood in rural India and Science ABC (www.scienceabc.com) which is a portal for sharing fun and interesting science facts.

Manisha Jain

Manisha has been energy professional for more than 7 years with work experience in the field of clean energy, climate change and sustainable development. Having worked with organizations like TERI (The Energy and Resources Institute), she has deep insights into residential energy efficiency and regulatory & policy aspects of the electricity sector in India. She has also co-authored a book titled Managing Power Demand – A case study of the residential sector in Delhi. Manisha is M.Tech in Energy Systems from IIT Bombay and is currently pursuing her Ph.D. in Climate Studies at IIT Bombay.

The short URL of the present article is: http://bgli.in/tZ4ov

79 comments

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1
Karanvir Singh

Hello there! the area of roof of my house is 1400sq. fts. (1000 sq. fts. available area) and i want to use the solar power . So what would be the cost of solar power system(including all necessary components) for 5 kW power?Waiting for your answer.

Thanks.

2
Abhishek Jain (Mod)

Hi Karanvir,

Typically a 1 kW offgrid solar PV system costs about 1-1.25 lakhs (inclusive of everything)

3

Hi, i just wanted to know , i want to rent out few rooms in my house , should i need to have commercial connection, my location is kanpur KESCO

4
Abhishek Jain (Mod)

You do not need commercial connection for renting flats.

5

Dear Abhishek Jain

Yes exactly I want to know power consumption to figure out how much load to be added for 500 VA inverter. Example as for split AC 1.5 ton 3 star rating Power Consumption is 1735 watt. then what is the power consomption of 500 VA inventer with single 12 volt Battery. Await your reply.

Saba Iqbal

6
Abhishek Jain (Mod)

On a 500 VA inverter it will be safe to put 500 x 0.75 = 375 watts of load.

7

Pl let me know electricity consumption of 500 VA inverter with one 12 volt battery. I mean to say wattage consumption. Await your reply.

8
Abhishek Jain (Mod)

What is the Ah rating of the battery?

9

Hey i am planning to buy a new water heater my requirement is of 50 ltr but I am confused between elctric and gas gysers . Which one would be cheap in terms of energy consumption most of the electric gyser are of 2kw hence it consumes 2 units if kept on for 1 hour so usage charge will be around 14 rs per day and in case of gas gyser if its consumption is around 0.5 scm/h then it would cost around 9 t0 13 rs .so am I correct. will there be huge diffrence in terms of energy consumption between the two or both will cost me same I ve heard that gas gyser will cost more per month than electric but is it true bcuz from these calculations gas one seems to be cost much less. I live in gujarat and I guess the electric charge over here are 7 rs per unit and of gas(png) is 20 to 30 per smc

10
Abhishek Jain (Mod)

Geysers have thermostat which switches them off when the water is heater to a certain temperature (set in thermostat). So a 2kW element will not consume 2 units in 1 hour. It will consume electricity till the water heats up to required temperature. Electricity consumption will depend on amount of water to be heated and not on element wattage. In fact element wattage just determines how fast it can heat water. How much water are you heating in the geyser (or what sized geyser are you buying?).

11

I am looking to buy a gyser with 50 liters capicty mostly I will go with haier. So how much units will really be consumed in a day?

12
Abhishek Jain (Mod)

Hi,

If we look at heat needed to heat 50 lts water, it will be

50 x 4.2 x (60-20) kilo joules (assuming your water heater will heat water up to 60 degrees and your tap water comes at 20 degrees ... it may be less in winters).

50 x 4.2 x 40 = 8400 kJ

Now 3600 kJ make 1 kWh or 1 unit of electricity. So 8400 = 2.33 units.

Now 50 lts water heater have highest standing losses (heat lost to external environment) of about 1 unit a day (for BEE 5 star rated water heaters). So if you leave hot water in the water heater for a day or keep the water heater on 24 hours, then you loose 1 unit of electricity. So all in all you use 3.33 units + per day with a 50 lts water heater.

13

Hi abhishek,

Panasonic gives me one year warranty and ifb gives four years warranty. I am confused between both I need a 7kg model front loading of either pls suggest confused in terms of warranty and after sales support. Does Panasonic has a good after sales support network. Thanks

14
Abhishek Jain (Mod)

Hi Lt Amit,

I think IFB is a safe bet for you. As it is a local indian brand and will have larger service network (in case you get transferred frequently).

15

Hi abhishek,

Lt Col amit bector this side, sorry I forgot to mention that we are a family of four pls advice on the capacity of the machine also.

16

Hi abhishek,

I purchased an hitachi ac on your advice and I am fully satisfied. Now I have to buy a washing machine earlier I had whirpool top loading fully automatic washing machine h65 model. I bought it in 2008 but only an year after the repair cycle started and I was posted in Madhya Pradesh where after sales service was very poor. I am an army officer and get posted all over the country where there is hard water, scarcity of water, less pressure of water etc. I have been reading your posts they are very informative. Pls advice as to which washing machine I should go for , I have shortlisted some brands like Panasonic , ifb and bosch. I find Panasonic and bosch to be good but I am worried about their after sales service also the warranty is only of an year whereas ifb provides four years warranty. Also Panasonic and bosch are a little expensive but it is not a major factor if you advice them over ifb. Pls suggest alongwith the model number. Thanks in advance?

Regards,

Lt col amit

17
Abhishek Jain (Mod)

Hello Lt Col Amit,

I would suggest you going fro IFB as being an indian brand and a popular one it will have a larger sales network. Comparatively bosch will have service centers in select cities. Panasonic will be better than Bosch but IFB will be a safe bet. In fact LG and Samsung will also be quite safe. For a family of 4 you would need 6-6.5 kg washing machine. What is your budget like for the washing machine?

18

hi abhishek ,

thanks for the reply. My budget is around 35k to 40 k. i need a long lasting product with good sevice network. After reading your reply i feel ifb is good but does panasonic have a good service network and how often these machines go faulty be it ifb or panasonic, Bosch i can understand will not have that good a network. pls suggest a 7kg model.

19
Abhishek Jain (Mod)

Hello Lt Amit,

Panasonic has two models NA-127VB3W01 and NA-107VC4W01, both front loading 7 kg. Both are good. You can go for anyone of them. In fact I would rate panasonic higher in washing machines.

20

Pl let me know electricity consumption of 500 VA inverter with one 12 volt battery. I mean to say current consumption. Awaiting your reply.

21
Abhishek Jain (Mod)

Hi Saba,

Your question is not very clear to me. Current is the electricity that runs through the wire and is noted in Amp. Voltage is the potential difference between two points. And units or kWH is the total electricity consumed or energy consumed. All are very different. Can you please be a bit more specific or tell me why you need that value? You may need amperes to find out the thickness of wires that can handle the current. Or you may want to know energy consumption to figure out how many extra units will add up on your electricity bill.

22

I am Gananath from Mysore. Karnataka. I need a small help. Am looking for rechargeable battery to be used in gas lighter, clock,TV remote etc. I understand that the Ni-MH one is good. Is that so? Also, which brand is good?Any more relevant info on these ?

Thanks in advance.

23

Hello Abhishek and Manisha,

I would like to start by copiously congratulating you in this effort. I am sure the website and the cause will soon be as big as you want it to be.

I am a Dual Degree (i'm sure you understand the term) graduate in Mechanical Engineering with MTech in Energy Technology from IIT Madras. I currently work in the oilfields in upstream oil exploration and production. I am a huge believer in the cause for energy efficiency and have done internships and projects in this regard. Though I have some limited exposure, I have never been blown away to the extent I am now by just browsing the website. This is something I would love be a part of. Your experience and specialty fit snugly to what I seek - a strong learning attitude with 'the' noble cause :)

I am sure you will reply to this mail with just as much enthusiasm as the other posts. It is just incredible the diligence you show towards this.

On another note, I am curious as to how you make money from this (if any). If its just nurturing a passion of yours with no monetary reward, I would have interacted with an otherworldly creature.

Looking forward to your reply,

Sincerely,

Manohar

24

Thank you very much Abhishek for responding to all my queries. Now, even if buy an immersion rod, it is going to be an informed decision.

Happy to have found BijliBachao.com :)

25
Abhishek Jain (Mod)

I am glad that Bijli Bachao was of help to you.

26

Which is better? An instant water heater or immersion rod?

27
Abhishek Jain (Mod)

Instant Water Heater.

28

Could you please explain why?

29
Abhishek Jain (Mod)

Here is the reason:

1) Energy consumption of any water heating method will depend on three things: a) amount of water to be heated b) temperature difference to which it has to be heated c) insulation of the method (it should not loose heat).

2) In case of immersion rod and heating on gas stove the insulation will not be good. As you heat water, it will loose some heat to the environment. Secondly you will not be able to control the temperature of the heating and thus you may heat extra leading to a) extra hot water (more hot water than required) b) some water may get converted to steam if heated extra. So immersion rod and gas stove are certainly not energy efficient.

3) In Instant Water Heater and Storage Water heater, the body of the water heater contains good insulation so that heat is not lost. They also have a thermostat so that heating is controlled. One factor that can go against a water heater is that you can potentially leave some hot water in the water heater which may loose heat through out the day (even with best insulation, there is some heat loss although quite less). But that heat loss is quite small as compared to the amount of energy used for heating water. Now in instant water heater, the storage volume is quite less and thus potential of heat loss is also less.

An ideal solution will be one where there is no extra heating, no excess water heated, and there is no heat loss (perfect insulation). But that is not possible in real life situation. So the best option is to buy an instant water heater with adjustable thermostat. On which you set the temperature to ideal requirement (say 40 degrees) and then take out the right amount of water from it (switch it off as soon as you are done).

30

I do understand this website is about saving electricity but does it also talk about the cost savings (upfront or running costby end user.

I mean if I pay say Rs. 5000 extra on AC A compared to AC B, then how much time will it take for me to recover the cost differnce. This difference can be between AC A, AC B, the AC with average cost & the cheapest available AC. This will help people to choose the right AC.

Same can be done for Heater, Geyser, TV, etc.

If you are already doing it, apologies, please let me know where will I find this kind of information.

Now, coming to my specific problem. I am looking for cheapest solution for heating water for bucket bath.

For each bath we would be using lukewarm water, say around 25 liter. And this is required for two person - 25 liter twice in a gap of 30 around minutes or more.

Possible methods I can think of are - Instant Water heater, Storage Water heater, Heating on Gas stove, Immersion Rod.

Being a Bijli Bajao website, I think heating on gas stove is something you'll never cover. I have seen information about storage & instant water heater at your website but there is no information about immersion rods. Can you please help me here ?

Are immersion rods efficient in running ? Exactly how do they compare with other solutions ? What will you suggest me in this particular case ?

Thanks in advance :)

31
Abhishek Jain (Mod)

Hello Vikasu,

We do talk about payback especially for ACs. However the payback is specific to a person because it depends on model selected, usage of the appliance and electricity tariffs applicable. And thus you can see responses to comments (by individuals) talking about payback.

Now to your question: We do have a post on gas vs electricity comparison: https://www.bijlibachao.com/appliances/cooktop-comparison-gas-electric-and-induction.html

However amongst the methods you have mentioned: purely in terms of energy savings, Instant Water Heater will be most efficient. And here are the reasons I can think of:

1) Energy consumption of any method will depend on three things: a) amount of water to be heated b) temperature difference to which it has to be heated c) insulation of the method (it should not loose heat).

2) In case of immersion rod and heating on gas stove the insulation will not be good. As you heat water, it will loose some heat to the environment. Secondly you will not be able to control the temperature of the heating and thus you may heat extra leading to a) extra hot water (more hot water than required) b) some water may get converted to steam if heated extra. So immersion rod and gas stove are certainly not energy efficient.

3) In Instant Water Heater and Storage Water heater, the body of the water heater contains good insulation so that heat is not lost. They also have a thermostat so that heating is controlled. One factor that can go against a water heater is that you can potentially leave some hot water in the water heater which may loose heat through out the day (even with best insulation, there is some heat loss although quite less). But that heat loss is quite small as compared to the amount of energy used for heating water. Now in instant water heater, the storage volume is quite less and thus potential of heat loss is also less.

An ideal solution will be one where there is no extra heating, no excess water heated, and there is no heat loss (perfect insulation). But that is not possible in real life situation. So the best option is to buy an instant water heater with adjustable thermostat. On which you set the temperature to ideal requirement (say 40 degrees) and then take out the right amount of water from it (switch it off as soon as you are done).

Now gas is cheaper as compared to electricity, and there are gas based instant water heaters available in the market. So from all possible scenarios, gas based instant water heaters are most optimal in terms of running cost (electricity or energy cost and not capital cost). But the overall economics (payback) of any method will depend on 1) You usage of hot water 2) Rate of electricity applicable to you as per your usage of electricity 3) Cost at which you get gas in your house and 4) Cost of these appliances.

Typically we suggest going for as small storage water heater as possible. In case of bucket bath, a single bucket is about 10-15 lts. If you use multiple buckets then you may end up using 25 lts. Again the 25 lts is at 38-39 degrees (as in your case). A storage water heater without thermostat may heat water to 60-70 degrees and you will have to mix cold water to it. But in a model in which you can set thermostat temperature, you can set it low and directly get optimally hot water from it (and save energy as well).

Now even for storage a lot matters on which city you live. If you are in North where temperature in winters is really cold, water is very cold in winters and thus you need a larger sized water heater (15 lts or so) to get 25 lts of lukewarm water. But if you are in place like Mumbai where it is not much hot but more humid and even the water from tap is not too cold, you can do with a 6 lts water heater as well.

So the suggestion will depend on the city where you live.

Hope this helps.

32

What a detailed response, thanks a lot.

If I compare storage water heater and immersion rod, both have issues unless I be careful.

In case I use immersion rod & heat water just enough, will it be more efficient than storage water heater ? And, in this case how will it compare with instant water heater ?

I stay in Delhi where it becomes too cold in winters.

33
Abhishek Jain (Mod)

Now suppose in winters you are getting water at 10 degree centigrade. To heat 15 lts of it to 40 you need: ( 15 x 4.2 x (40-10) )/3600 = 0.525 units of electricity.

A BEE 5 star rated 15 lts water heater has a standing loss of 0.5 units/day. So if you leave a full tank of hot water in a storage water heater of BEE 5 star, it will loose a lot of heat by next day. Suppose you have a water heater with thermostat where you keep temperature to 40, then it will be cold by the next day. If you keep thermostat at 70 then it will be some hot but not completely hot next day (assuming that you have switched off the water heater).

Correspondingly Immersion rod will be better if you do not heat excess water or waste hot water. If you waste 1 bucket of hot water (about 15 lts) at 40 degrees, then it will be the same. In case you use immersion rod just enough, then it will be better to use it (as chances of leaving hot water in water heater are more). But immersion rod has its own risks and inconvenience.

34

Thanks a lot Abhishek.

I somewhere read that instant water heater can't give very hot water, can we in Delhi use the instant water heater ?

What is the meaning of having 3 litre storage in instant water heater ?

Do you think a 3 litre instant water heater makes more sense than a 1 litre (if instant can be used) ?

When I am buying (instant or storage) water heater, what all numbers I should consider to make final decision ?

35
Abhishek Jain (Mod)

Instant water heaters are high wattage water heaters. Which means they provide high amount of instantaneous heat. There are 3 kW instant water heaters, and there are 4 kW instant water heaters. Difference is that the intensity of heat is more in 4 kW and thus it will heat faster.

Now again assuming that you get water which is at 10 degree centigrade. And you have a 3 lts water heater.

Energy that 3 lts would need to heat up from 10 to 40 would be = (3 x 4.2 x 30)/3600 = 0.105 kWH.

A 4 kW heating element will provide that in (0.105/4)x60 = 1 mins 40 seconds
A 3 kW heating element will provide that in (0.105/3)x60 = 2 mins and 6 seconds.

If you have a 1 lts water heater then it would need (1 x 4.2 x 30)/3600 = 0.035 kWH.

A 4 kW heating element will provide that in (0.035/4)x60 = 30 seconds
A 3 kW heating element will provide that in (0.035/3)x60 = 42 seconds.

But if you keep the water flowing, then it would not get that much time to heat up. And that is why people complain that instant water heater does not give very hot water. In other places where temperature is not slow, it may work well.

Well I would typically suggest people to go for storage water heater and use it properly (i.e switch it off before last usage). In your case if you use 25 lts hot water per bath, then you need at least 15 lts storage water heater. If you switch it off before last use, then you would not waste much energy. Alternatively you may also use immersion rod if you want and use it in ideal way.

36
P. Karan Singh, Advocate

I was looking for 10 best inverter ACs in .75/.8 ton category [at least in electricity consumption scales] but unfortunately couldn't find in your website. Could you please help asap. [Ph. 9830444202]

37
Abhishek Jain (Mod)

There are not many ACs in that size range. You can look at these models:

Daikin FTKM25PRV16
Sharp AH-XP10LV
Mitsubishi MSY-GE10VA
OGeneral ASGA09JGCA

38

Hi Abhishek,

First of all, let me congratulate you for taking your precious time to answer all our queries and maintain such a brilliant site.

I'm contemplating on buying 3 AC's, while doing some initial market research people advised me to go for Daikin, Blue Start AC's. I'm still not convinced and started googling :). Here is my requirement

Ground floor bedroom (West Facing) 11"X13", west facing window 4"X4.5" and another south facing window 4"X4.5". Planning for a fixed motor AC, as we plan to use it only in summer.

First floor kids bedroom (east faing) 12"X10", east facing window 4"X4.5" and another south facing window 4"X4.5". There is another floor on top of this room. Planning for a fixed motor AC, as we plan to use it only in summer.

Master bed (west facing) 17.5"X13", west facing window 4"X4.5" and another south facing window 4"X4.5". There is another floor on top of this room. I plan to go for a inverter of this room as usage is going to be high.

Please can you suggest the tonnage for each room and also suggest a good brand that is economical to run and has good after sales service.

Thanks in Advance.

Regards,

Dinesh.

39
Abhishek Jain (Mod)

Hello Mr Dinesh,

Which city is this for?

40

Hi Abhishek,

It's Hyderabad city.

Dinesh.

41
Abhishek Jain (Mod)

Hello Mr Dinesh,

You need:

1.2 tons cooling for ground floor bedroom
1 ton cooling for kids bedroom
1.8 ton inverter AC for master bedroom

You can look at these ACs:

1.2 ton AC:
Hitachi RAU514IUD or RAU514EUDA
Whirlpool 3D Cool Platinum V or Magicool Platinum V
Voltas 155 CY

1 ton AC:
Samsung AR12HC3USNB or AR12HC3USUQ or AR12HC3ESLW or AR12HC3TFUR
Hitachi RAU412HTD or RAU412KTDP or RAU312HUD or RAU312HUDP
Daikin FTC35PRV16
Whirlpool 3D COOL DELUXE III

1.8 ton inverter AC:
Daikin FTKP60PRV16
Daikin FTKM60PRV16
Sharp AH-X21RET
LG BS-Q246C8R3
LG BS-Q246C8A2
Samsung AR24HV5NBWK

42

By the way, all measurements are in feets.

43

Hi,

I am an M.Arch student of Environmental Planning in Architecture, Rachana Sansad, Mumbai.

I have been reading and referring to your site. I first looked into the website for picking out a Refrigerator and then being a student keep looking into it for more helping links and information. Love the concept of the website great going!

44
Abhishek Jain (Mod)

Thanks a lot Vrinda. I am glad that you found the website useful.

45

Hi sir ,

I am disorganization.webs.com engineeringl student. My friends and I have formed a group named YUVA and we have taken up a project named Light up Revolution where dark villages will be provided with solar lighting system. We have already installed to around 60 houses. We will be shortly lighting 250 houses this diwali. I would like to know about the subsidy for solar lighting system. If I purchase solar panels, battery from MNRE approved company and the charge controller and lights are produced by ourselves which all together forms a kit, then will I get subsidy for the panels and battery separately. Or should I purchase the whole kit from the company. Because we work out the kit for 1700 and the same one we get for 3200 from company. So if we can get 40% subsidy on 1700/- then we could light more lives. Please assist us with this.

Thank you

http://www.yuvaorganization.webs.com

46
Abhishek Jain (Mod)

Hi Akhil,

A typical statement I hear from most system integrators (vendors) is that subsidy has stopped. The thing is that there is no official statement on that, but for many people the subsidy papers are not getting processed. And so getting subsidy is getting difficult. There is no sure shot solution that I know of getting subsidy so I cannot help you much on this.

47

Hi,

I would like to purchase a frost free double door energy efficient refrigerator (300-350 ltr) which is having relevantly lesser size freezing compartment as we do not use the same that much and we need more space to preserve different items. Iam also confused either to purchase double door fridge or bottom door fridge. Further, my previous Godrej fridge ( back compressor) got damaged due to rat biting and the rat mesh was not provided by the manufacturer. Keeping in view of my concerns, kindly suggest best frost free double door energy efficient fridges with rat mesh.

48
Abhishek Jain (Mod)

Hello Mr Ravi Shankar,

You can look at any of these models:

Brand Name Model Number Gross Volume(Litres)   Electricity consumption (unit per year) Star Rating Market Price
LG GL-314PNGE4 310   386 4 29222
WHIRLPOOL NEO IC355 Royal 340   271 4 34888
SAMSUNG RT36HDRZESL/TL 345   265 4 37500
SAMSUNG RT33HDRZESL/TL 321   261 4 33000
LG GL-P372RPJM 335   260 4 38300
LG GL-P372RSJM 335   260 4 37600
LG GL-D372RLJM 335   253 4 33700
LG GL-D372RPHM 335   253 4 36200
LG GL-D372RSHM 335   253 4 36600
LG GL-D372RPJM 335   253 4 40890
LG GL-D322RPJL 310   247 4 32800
LG GL-M322RATL 310   247 4 35290
LG GL-M322RLTL 310   247 4 28800
LG GL-P322RPJL 310   247 4 31700
LG GL-D322RPJZ 310   198 5 36590

Samsung brand gives the size of freezer and refrigerator section separately so I know Samsung RT36HDRZESL/TL has a better ratio as per your needs. But others do not provide the information on their tech specs, so I cannot comment on others. Also same for the rat mesh, none of the manufacturers provide this information.

49

Dear Abhshek,

Really great initiative from you & your team. Congratulations from my end.

This is to request for your kind help regarding the following scenario:

We are staying in a rented flat in Hooghly, West Bengal and being a newly construction flat ,the utility service provider had visited the flat to do a load survey for new domestic connection of our flat and informed us that the sanctioned load will be 5KW. They had then presented the landlord with a bill of Rs. 17000 to submit as a quotation amount whereas other flat owners in the same complex with almost the same kind of appliances were asked to submit Rs. 6000 - 7000.

Really could not understand the justification. Could you please help in this regard?

Krishnandu

50
Abhishek Jain (Mod)

Hi Krishnandu,

If the type of connection (single/three phase) and connected load is the same, then the security deposit/other charges should be same. Can you check with your neighbors and figure out what is their connected load and connection type?

51

I am in the process of taking help from Abhishek here. I have been slapped with higher bills since some time now. However other than that, interacting with him helped me realize my own consumption too.

This is a great initiative, and the promptness with which you reply to the people who post queries is remarkable. I am really touched by your selfless actions.

52

Hi,

I was just doing a Google search on how power consumption works and landed up on your page. Then I just started browsing around the site and read a bunch of articles. I must say, I am very impressed and almost touched by the wealth of information you provide in your articles and more importantly the diligence with which you reply to almost every comment. I think you deserve immense credit for making such a difference in the lives of so many middle-class Indians. Or just about any section of society from anywhere. Bookmarking this site for sure and your poster on the time taken for common appliances to consume 1 unit is going up on my office desk. Thank you and cheers to your effort and initiative.

53
Abhishek Jain (Mod)

Hello Mr Selvam,

Glad to know that you liked the site and found it useful. Your good words motivate us to do better :).

Regards,
Abhishek

54

Thanks

sachin

55

Sir, please guide to choose Ac

My room size is 10x10x10

only roof is opened to direct sunlight,

& my budget is 40,000/- & I want to use AC during summer (night appr 6hrs)

Iam living in Gulbarga ( Karnataka state ), where temp during the summer reach up to 47 degree,

Which ac to buy inverter Ac or 5 star rated ?

56
Abhishek Jain (Mod)

You should go for BEE 5 star rated 1 ton AC for your room. You can look at these:

Godrej GSC 12 FG 6 WNG or GSC 12 FG 6 BNG
Mitsubishi MS-GK10VA
Whirlpool 3D Cool Climate Control
Panasonic CS-XC12QKY

57

Hi ,

I am not sure if I am posting this on correct forum.

I am staying in a house which is 3 story, out of which I have rented out 2 floors and have fixed submeters on each floor to see how much electricity is used by each tenant. I have a digital 3 phase meter with 5 KVA load.

KESCO Officials came to my house for inspection and they are imposing section 126 of electricity act on me which says unauthorized use of electricity,and calculated load of 20KVA just by counting the equipments in the house however the MD in meter shows only 7 KVA. I am ready to pay penalty and can increase the load to 10KVa, but they are asking for Rs 2.5Lac penalty or Rs 50k bribe.

Can you please guide me what should I do?

Thanks,

Pankaj

58
Abhishek Jain (Mod)

Hello Mr Pankaj,

Last year UP Electricity Regulatory commission started putting penalty on exceeding connected load even in residential connections. This was done immediately after the grid failure couple of years back. The single most reason for grid failure 2 years back and power cuts in Delhi this year is excessive demand during peak hours. It is like if huge trucks and big cars come on a highway, even a broad highway gets jammed. Similarly when lot of power is drawn by industries and houses (more than that allotted), then the grids get jammed and they fail. So that was the reason UP started imposing penalty on increasing the load (so for e.g. if there is any such reporting in transport department where you have to tell what vehicle you will take on road so that they can plan the road width, and you tell that you will take a scooter, but instead you take a car, then there will be a penalty.). Now the penalty clause as per UPERC says like this (ref: http://www.uppcl.org/uppcllink/documents/11062013043528Tariff_2013_14_Final.pdf page 4):

if the maximum demand in any month of a consumer having TVM/ TOD/ Demand recording metres, does not exceed the Contracted Demand beyond 10% then such excess demand shall be levied at normal rate as charged for exceeding contracted demand..

In the next para it says ? If the demand exceeds the contracted demand by more than 10% then such excess demand shall be levied at twice the normal? ?

Now you will have to look at your electricity bills to check what has been your maximum demand in last few months to really validate what is your maximum demand. And the penalty should come on your bill. You should not be paying bribe and in fact you should report this to the Grievance Redressal Cell in KESCO. If they do not listen then you can go to the Electricity Ombudsman in UPERC (UP Electricity Regulatory Commission).

59
Saurabh Kesharwani

Hi! Abhishek,

I have been reading your articles in bijlibachao.com and found them very useful and interesting.

Well! And now I want to buy an AC only after having discussed with you.

My room size is of length=23 ft. 9 in.; breadth=13 ft. 9 in. and height=8 ft. 4 in.

My room is below terrace. And it's exposed to the Sun by 3 sides (including the terrace). My room temperature touches 32 degrees and with an air cooler I can manage to bring it down only till 29 degrees, in this extreme heat. Which is unbearable. I work from my room. So whether for work or for leisure I stay in my room for the whole day and night.

Equipments in my room are: one 14" old t.v., one music system, one computer, one tubelight, two CFLs of 23 watts, one fan and one person, which is me.

Setting up an 'split AC' is problematic as I will have to get modifications done for a clean looking fitting, which is not easy, as compared to normal installation. Therefore I want to go for a 'window AC', and I have following questions, for you to help me:

1) Would a window AC of maximum tonnage available, i.e., 2 tonn suffice in my room of the size I mentioned above?

2) If 'yes' then please also suggest me few models to choose from or one in particular, which would serve my purpose of cooling the room in such a condition.

Thanking You!

-Saurabh Kesharwani

60
Abhishek Jain (Mod)

Hi Saurabh,

Which city is this for? I would still advice to go for split AC because manufacturers have significantly reduced models for window ACs and on top of that the most efficient window ACs are 1.5 ton ACs. We hardly have a few BEE 5 star rated 1 ton window ACs. And for 2 ton window ACs, the highest BEE star rating is 2. Now window ACs have energy efficiency one level lower than split ACs, so a BEE 2 star rated 2 ton window AC is equivalent to BEE 1 star rated split AC. Also looking at your high usage, it is advisable to go for inverter technology AC and this technology is only available in split ACs. So I would suggest that you reconsider going for split ACs. And yes please let me know your city for sizing the AC.

61

Thank you for replying Abhishek!

I agree with your recommendation of split ACs, which even I had thought previously. However, making right installation arrangements at my place seemed a big headache. Like drilling, breakage, electrical points to be set, etc. And kind of a little trial-and-error to be made. So I thot I'll compromise on the economy part and go for a window AC.

Besides, I already have a 'window AC sized space' cut, made on my room's window. So a window AC is just to be bought and fit in that space. Moreover, this cut is made on one corner of the room and its towards the ceiling.

Well! My city is 'Sagar' in M.P. (which is on the way from Bhopal to Jabalpur). And here recently the temperature has touched 47 degrees, breaking the record of 20 years, in the month of June.

So please analyse as per my room's size (mentioned earlier) and tell me if I can still go (or compromise & settle) for a window AC :-)

62
Abhishek Jain (Mod)

You need about 3 tons of cooling for your room. If you cannot fit split AC then I would suggest putting 2 window ACs of 1.5 ton on opposite corner of the room (if possible). I would recommend going for nothing less than BEE 5 star rated window AC (equivalent to BEE 4 star rated split AC) for your room as you would be using it day and night. You can look at these models:

Hitachi RAV518HUD
Hitachi RAT518HUD
LG LWA5CP5F1
Hitachi RAW518KUD
Panasonic CW-KC1814YA
or any Voltas BEE 5 star rated window AC.

Voltas models may cost less than 30K a piece. I would not suggest going for 2 ton AC because there are no efficient models available in 2 ton window. Putting two 1.5 ton ACs is the best that you can do.

63
Saurabh Kesharwani

Alright! Abhishek,

Thank you for replying!

I think then I will have to make my decision of buying a 2 tonn window AC, with the highest cooling capacity, i.e., Hitachi; with my fingers crossed :-)

(There's some issue with the web page of bijlibachao.com, that I am not able to find the 'Reply' hyperlink after your previous few replies. And I have to reply by clicking on further previous 'Reply' hyperlinks. Now the messages are not coming one after another, as they were appearing initially).

I will contact you for my further queries/ discussion on appliances.

I appreciate your knowledge sharing and guidance.

Thank you very, very much.

-Saurabh

64
Saurabh Kesharwani

Hi! Abhishek,

Thank you! for sending me the brand and model wise chart comparison for window ACs.

Well! If I am to go by my knowledge & understanding, I will choose Hitachi, as it has the highest cooling capacity of 6160. AND, if EER is to be considered then the highest EER is 2.83, which is of Panasonic.

However, I also feel that I shall give more weightage to 'cooling capacity' than 'EER' and choose the Hitachi model. Will I be right doing this, and is this the right way to think?

Secondly, will the 2 tonn window AC give anything below 27 degrees of cooling in the peak summer day time, in the room of the size of mine? If not, then this decision of buying one '2 tonn window AC' may not resolve my problem? :-(

Thanking You!

-Saurabh

65
Abhishek Jain (Mod)

You should go for the one with highest cooling capacity as you have a bigger room. I cannot confirm if it will work in peak summer day time, but my gut feel says that it should not be too bad.

66

Thank you for replying Abhishek!

I understand that buying a 2 tonn window AC would be a compromise in cooling as compared to 2 X 1.5tonn window ACs. However, if I still put a 2 tonn window AC please guide me further:

1) In the size of my room of length=23 ft. 9 in.; breadth=13 ft. 9 in. and height=8 ft. 4 in; will it be able to make the room temperature 25 degrees when its 47 degrees outside at at peak summer?

2) During monsoon, when it gets really 'humid' and uncomfortable, will this one 2 tonn window AC be able to remove the entire humidity and make it comfortable?

Thank you!

-Saurabh

67
Abhishek Jain (Mod)

Hi Saurabh,

1) It will not cool the whole room to 25 degrees in peak summer day time. But if you sit in front of it, it will throw cold air on you. If you sit far away from it, you may not feel cool.

2) It should work well in monsoon season.

You can look at these models:

Rank Brand Model Tonnage Cooling Capacity (in Watts) Power Consumption (in Watts) EER Ratio Star Rating
1 PANASONIC CW-UC2414YA 2.000 5950 2100.0 2.83 2
2 BLUESTAR 2W24LA 2.000 5850 2080.0 2.81 2
3 HITACHI RAV322HSD 2.000 6160 2200.0 2.80 2
3 HITACHI RAV222HUD 2.000 6160 2200.0 2.80 2
4 VOLTAS 4011121 2.000 6000 2214.0 2.71 2

68

Thank you for replying Abhishek!

Well! Please tell me if I go for a window AC of 2 tonnage, what will happen, how will it affect the result, in terms of:

1) efficiency,

2) cooling,

3) humidity, and

4) expenses.

69
Abhishek Jain (Mod)

Hi Saurabh,

Firstly the best star rating available in 2 ton window AC is BEE 2 star, which is equivalent to BEE 1 star split AC. So in terms of efficiency it will be quite low. The power consumption will run close to 2.5 units an hour.

In terms of cooling, it may fall short during summers in day time as you need 3 tons cooling. It will only provide local cooling and you will have to sit in front or close to the AC.

From a humidity perspective, it should be able to remove humidity and it should not be a problem.

From expenses perspective it will be cheaper to buy as compared to 2 1.5 ton AC. But electricity consumption would be almost the same (or may be slightly less in 2 efficient BEE 5 star rated 1.5 ton AC). However you may not get full cooling in 2 ton AC.

70

Hi Abhishek, could you please give me some more information (electricity consumption) about the LG split AC model LSA5NR3F4. I don't find it on LG website and I heard that its an one year old model but the manufacturing date written on the product is January 2014. I am bit confused. How is it compared to the model LSA5NP3F ?

71
Abhishek Jain (Mod)

Hi Santosh,

LSA5NR3F4 has power consumption of 1615 watts and cooling capacity of 5175 watts and EER of 3.2. LSA5NP3F also has exactly same specifications. It's ratings were approved by BEE in late December 2013. And thus the confusion.

72

Abhishek, why can't Power service providers like Reliance and Tata offer a web based system for consumers to monitor their electricity consumption in real time? Is any one working on this anywhere in India?

73
Energy Service & EPC Company

Dear Arpit

We are offering realtime webbased energy monitoring and management solutions, if you are interested for details shoot me a mail :[email protected]

74
Abhishek Jain (Mod)

Smart Metering is still not that popular in India. Hope new govt builds smart cities and smart meters become popular.

75

You can also approach to all north east indian state designated agency for behavior energy saving programme(nagaland,assam,tripura,manipur,meghalaya etc)

76

GEDA is looking for Behavioral energy saving programme, you can explore for the oppurtunity

77

Hi there.. I have a few question to ask.

Can I get your email?

78
Abhishek Jain (Mod)

you can write at [email protected]

Regards,
Abhishek

79

sir

need to know the contact detail of supplier who are selling spv at 32 rupees per watt

vijay

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