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BANGKOK 20 August 2019 00:05
Kenny202

Electricity bill up 35% this year

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20 hours ago, Vacuum said:

Just save the bills.

Or enter into an Excel every month.

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Posted (edited)

Apologies, I noticed my last spreadsheet didn't work. Made some changes - this one is OK (I hope!)

 

Electricity Bills 2.xlsx

Edited by MartinL

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2 hours ago, observer90210 said:

I was refering to the EU Energy label and if interested, below it will be better explained. Obviously, it is not the norm here in Thailand.

 

https://en.wikipedia.org/wiki/European_Union_energy_label

 

And for a specialist on the topic as you seem to be, I am convinced that this article in the Economic Times could be of some humble interest.

 

https://economictimes.indiatimes.com/industry/energy/power/five-ways-to-keep-your-power-bills-low/articleshow/46418945.cms?from=mdr

 

ridiculous milkmaid comparisons by non-tech savvy Indian journalists are no guide lines for anybody. it goes without saying that a new inverter is more energy efficient than an old conventional unit with fixed rpm compressor. 

Quote

Used 5 hours a day, the approximate bill for an old AC in a year: Rs 27,372 - Inverter AC: Rs 16,670

Quote

Don’t stuff your fridge full, there won’t be enough space for air to circulate inside, reducing the efficiency of the unit. Ice accumulation impacts energy consumption, so defrost regularly.

who owns nowadays fridges that need defrosting?

Quote

Annual power bill without unplugging appliances: Rs 24,000
After unplugging appliances: Rs 23,550
Potential savings: Rs 450 a year

saving "potentially" the princely sum of US-Dollars 0.54 monthly.

 

i rest my case Your Honour :coffee1:

 

 

 

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On the outdoor freezer, try the opposite of the Indian recommendation. Increase its thermal mass by making sure it is full- water bottles or plastic bins as ice blocks. This reduces compressor cycling and improves efficiency. You might also put it on a timer so the compressor just runs at night; it likely isn’t very efficient when running in 35C weather. If you can, get a temperature logger to make sure everything stays sufficiently cold during the day.  Avoid opening it frequently- the humidity adds a lot of cooling energy. 

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On 6/26/2019 at 11:19 AM, sometimewoodworker said:

But the increase on a specific 533 units is from the old bill at 2,230 to the new bill 2,255 or just under 1% on the total charge.

Yes, about 1% increase from May.

Every four months the so called "fuel surcharge" (Ft) is determined based on energy prices.

 

What also comes as a surprise to some: unit price rises depending on consumption.

Unit price rises at 150 and 400 units.

Our last bill: 2078.91 Baht for 493 units (4.22 Baht per unit).

Unit price can raise to about 4.4 Baht.

 

Pretty amusing how many threads about huge rise in power prices have come up recently :smile:

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On 6/26/2019 at 9:04 PM, Naam said:

solar is much more expensive than public grid (return on investment is abysmaly low). 

Panels at 10B/W, grid-tie inverters about the same on Lazada. If you DIY, that puts you around a 3-year payback. I would only put in enough to offset your daytime use unless you want to talk to PEA, but that is a 12% rate of return assuming just a 12-year life. 

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2 hours ago, tjo o tjim said:

Panels at 10B/W, grid-tie inverters about the same on Lazada. If you DIY, that puts you around a 3-year payback. I would only put in enough to offset your daytime use unless you want to talk to PEA, but that is a 12% rate of return assuming just a 12-year life. 

if you look at my electricity bill (page 2) you see 4,922 kWh/month consumption = 164kWh/day = estimated usage during photovoltaic efficient sunshine hours fluctuating between 7 and 15kWh per hour.

 

therefore case closed marked "mission technically impossible / financially a wet dream".

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Naam, with a grid-tie inverter even putting in just a 4kW array will reduce your bill and pay for itself in three years. After that, it is like one month free electricity. 

 

Going off-grid would be expensive and not economically justifiable, but being under the radar with potentially just a little energy export is easy enough. 

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1 hour ago, tjo o tjim said:

Naam, with a grid-tie inverter even putting in just a 4kW array will reduce your bill and pay for itself in three years. After that, it is like one month free electricity. 

 

I would be very interested where your numbers came from. I always come out at more than twice that.

 

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Crossy— was doing math in my head, so I did round down, looks closer to 4 years.  I did a quick check on Lazada, but 335W panels for 3,600B and a 1.5kW inverter at 15,000B.  I didn’t check “balance of system” component costs, but (as a DIY project) you should be able to stay around 25B/W.  PVWatts gives 5,454kWh (AC) per year with default parameters, at 4.4B/kWh you generate 6B/W per year.  Not endorsing any of the products below, just picked fairly randomly. 

 

https://www.lazada.co.th/products/new-astronergy-poly-solar-panel-335w-5bb-i340296622-s659752907.html?spm=a2o4m.searchlist.list.2.1e33448fHPXpSO&search=1

 

https://www.lazada.co.th/products/green-home-grid-tie-inverter-15kw-invt-5-solar-cell-solar-panel-i316812936-s592024961.html?spm=a2o4m.searchlist.list.20.660b1a2aL2e2he&search=1

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