wgdanson Posted June 27, 2019 Share Posted June 27, 2019 20 hours ago, Vacuum said: Just save the bills. Or enter into an Excel every month. Link to comment Share on other sites More sharing options...
MartinL Posted June 27, 2019 Share Posted June 27, 2019 Apologies, I noticed my last spreadsheet didn't work. Made some changes - this one is OK (I hope!) Electricity Bills 2.xlsx Link to comment Share on other sites More sharing options...
Naam Posted June 27, 2019 Share Posted June 27, 2019 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 Link to comment Share on other sites More sharing options...
tjo o tjim Posted June 28, 2019 Share Posted June 28, 2019 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. Link to comment Share on other sites More sharing options...
KhunBENQ Posted June 28, 2019 Share Posted June 28, 2019 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 Link to comment Share on other sites More sharing options...
tjo o tjim Posted June 29, 2019 Share Posted June 29, 2019 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. Link to comment Share on other sites More sharing options...
Naam Posted June 29, 2019 Share Posted June 29, 2019 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". Link to comment Share on other sites More sharing options...
tjo o tjim Posted June 29, 2019 Share Posted June 29, 2019 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. Link to comment Share on other sites More sharing options...
Crossy Posted June 29, 2019 Share Posted June 29, 2019 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. Link to comment Share on other sites More sharing options...
tjo o tjim Posted June 30, 2019 Share Posted June 30, 2019 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 Link to comment Share on other sites More sharing options...
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