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20 votes
6 answers
3k views

Why is my background energy usage higher in the first half of each hour?

I have a smart electricity meter, which reports half-hourly readings to my supplier. I’ve noticed that when I’m not in the property, there seems to be an oscillating pattern to my energy usage: the ...
DavidH's user avatar
  • 311
0 votes
1 answer
180 views

Is it possible to make an "energy harvester" that drains old batteries? [closed]

I am currently looking at my stack of old batteries at home, did some measurements and found that most of them contain at least some energy left. I was then thinking. What is I could make a device ...
Bob Ortiz's user avatar
  • 169
6 votes
4 answers
22k views

Why has my electricity bill doubled? [duplicate]

In recent months, my electricity bill has been steadily going up, from 20% to 40% to, now, 100%. It's doubled. I don't see any appliance running continuously except several ceiling fans. All my ...
joehua's user avatar
  • 193
0 votes
4 answers
2k views

Are individual electric heaters more efficient to operate than an electric boiler?

(Edited to provide additional info) My wife is looking to buy an old house (I'm guessing 19th century) that'll need a lot of renovating, including the heating system. Renovation works will include (...
RJVB's user avatar
  • 113
1 vote
3 answers
864 views

Much higher energy use, maybe due to an old electrical heater?

We had an 100% increase of power consumption last and this year. It is mostly the night-tariff, which we now consume 27'000 kWh The day-tariff is only around 2'500 kWh. First we thought this may be ...
Tim's user avatar
  • 11
28 votes
13 answers
8k views

Locating source of excessive energy use

Background Info: My house is all electric. Last month when I got my electric bill, I flipped. It was triple that of any month prior. Now I know the cold (heating) can affect this so I decided to ...
hack3rfx's user avatar
  • 1,324