Help with how much my appliance costs?
Comments

Gerry1 said:HuCliveOfIndia said:TractorFactor said:Krakkkers said:TractorFactor said:
Could you link to any LED Christmas tree lights (300 or less) that would use more than 32p a day based on a 0.27p per kwh charge?
£0.27 is 27p.
£1.27 is one pound 27p surely?
As the poster above says, a number can't have two decimal points?OK, fair enough, that was just to illustrate the fact that "pounds and pence" can be expressed in decimals which don't exist in the real world for all practical purposes, as far as Joe Public is concerned.Gerry1 said:A quantity cannot have two decimal points !Whether it's realistic or practical to express it as such in everyday life is arguable  nuclear physicists probably express quantities down to many, many decimal places all the time due to necessity, but your average Joe Public buying apples or petrol or gas or electricity doesn't need such a level of accuracy.The big oil companies probably (I don't know for sure) do go down to 3 or 4 or maybe even 5 decimal places when trading, but then you're into the realms of multibilliondollar deals where a small difference in price can make a big difference in profit/loss.0 
It's a carp App for an energy monitor smart plug probably.
My Meross smart plugs show:
>>> for one string of 200 led lights with a transformer wall wart (not switched mode so more energy hungry) Current Power: 21.76 Watts. Energy used today 0.031 kWh (31 Wh) and 0.165 kWh/day on average.
>>> for another string of 100 leds, nominally 6 Watts it shows: Current 5.31 Watts, 0.021 kWh today and an average of 0.043 kWh per day.
They are on timers, so not on all day long.
Both sets are around 1/5 th of a kWh per day which at my 28p per unit is less than 6 pence.
My 2200 Watt kettle will consume more energy in 6 minutes of operation. That's probably less than two pots of tea for the two of us, We drink more than that every day . Then put the induction hob, grill or oven on, washer or dryer... Modern led Fairy lights are well down in the noise for electric use!!
0 
CliveOfIndia said:Gerry1 said:A quantity cannot have two decimal points !
@CliveOfIndia Decimal POINTS are completely different to decimal PLACES !
4 
Gerry1 said:CliveOfIndia said:Gerry1 said:A quantity cannot have two decimal points !
@CliveOfIndia Decimal POINTS are completely different to decimal PLACES !
Time and again we see kW and kWh misunderstood. Throw misrepresenting decimal coinage into the mix and total confusion rules. Much to be said for good old pounds, shillings, and pence. Not to mention ha'pennies and farthings!
I’m a Forum Ambassador and I support the Forum Team on the In My Home MoneySaving, Energy and Techie Stuff boards. If you need any help on these boards, do let me know. Please note that Ambassadors are not moderators. Any posts you spot in breach of the Forum Rules should be reported via the report button, or by emailing forumteam@moneysavingexpert.com.
All views are my own and not the official line of MoneySavingExpert.
0 
victor2 said:Gerry1 said:CliveOfIndia said:Gerry1 said:A quantity cannot have two decimal points !
@CliveOfIndia Decimal POINTS are completely different to decimal PLACES !
Time and again we see kW and kWh misunderstood. Throw misrepresenting decimal coinage into the mix and total confusion rules. Much to be said for good old pounds, shillings, and pence. Not to mention ha'pennies and farthings!0 
Gerry1 said:victor2 said:Gerry1 said:CliveOfIndia said:Gerry1 said:A quantity cannot have two decimal points !
@CliveOfIndia Decimal POINTS are completely different to decimal PLACES !
Time and again we see kW and kWh misunderstood. Throw misrepresenting decimal coinage into the mix and total confusion rules. Much to be said for good old pounds, shillings, and pence. Not to mention ha'pennies and farthings!🍺 😎 Still grumpy, and No, Cloudflare I am NOT a robot 🤖BUT my responses are now out of my control they are posted via ChatGPT or the latest AI1 
debitcardmayhem said:Gerry1 said:victor2 said:Gerry1 said:CliveOfIndia said:Gerry1 said:A quantity cannot have two decimal points !
@CliveOfIndia Decimal POINTS are completely different to decimal PLACES !
Time and again we see kW and kWh misunderstood. Throw misrepresenting decimal coinage into the mix and total confusion rules. Much to be said for good old pounds, shillings, and pence. Not to mention ha'pennies and farthings!Nah, wouldn't work properly, the electrons would be like the bubbles and all flow the wrong way, making the meter go bac...Oh, wait !
0 
TheElectricCow said:TractorFactor said:Here is a phot from the app:
This is a lamp with an LED bulb in it.
Today it has used 0.01 units of electric.
If I pay £0.27 per 1.00 units of electricity, then today it's used £0.27 (27p  surely not as it hasn't used 1.00kwh?) or £0.02  2p?
So the 5w lamp would cost £0.00135 (0.135p) per hour to run and the 50w lamp would be £0.0135 (1.35p).
£100.00 is one hundred pounds and no pence
£100.50 is one hundred pounds and fifty pence
£34.10 is thirty four pounds and ten pence
£1.04 is one pound and four pence
I understand petrol goes into 10th of pences, but they don't really exist  nobody goes into the petrol station to claim the tiny amount back.
I think this is why I don't understand what 0.135p is. No pounds and thirteen and a half pence? No pounds and one hundred and thirty five pence? I have always been taught in this scale of numbers, anything before a decimal point is a pound and anything after is a pence (until you get to much bigger values of course).
So when someone writes 1.35p, I only understand it's £1.35 albeit written weirdly. If it's all pence, why isn't it £0.135 (which is then understandable as zero pounds, thirteen and a half pence?).
If I kept the lamp on for weeks, months and it racked up ten pounds of cost, how would you write that when using 1.35p as a base? Because 10.1.35p isn't a value number that anyone sane would understand :P0 
@TractorFactor, your education presumably gave you an understanding of what 0.5p means, even if we don't have half pennies any more.
So, 10 of them would be 5p, or £0.05.
At the other end of the scale, £1 million is easier to read than £1,000,000.
Not difficult to understand, surely?I’m a Forum Ambassador and I support the Forum Team on the In My Home MoneySaving, Energy and Techie Stuff boards. If you need any help on these boards, do let me know. Please note that Ambassadors are not moderators. Any posts you spot in breach of the Forum Rules should be reported via the report button, or by emailing forumteam@moneysavingexpert.com.
All views are my own and not the official line of MoneySavingExpert.
2 
TractorFactor said:I think this is why I don't understand what 0.135p is. No pounds and thirteen and a half pence? No pounds and one hundred and thirty five pence?One hundredandthirtyfive onethousandths of a penny. Or, onetenth of a penny plus threehundredths of a penny plus five onethousandths of a penny.Or just less than oneseventh of a penny, if you prefer fractions to decimals.TractorFactor said:I have always been taught in this scale of numbers, anything before a decimal point is a pound and anything after is a pence (until you get to much bigger values of course).TractorFactor said:So when someone writes 1.35p, I only understand it's £1.35 albeit written weirdly. If it's all pence, why isn't it £0.135 (which is then understandable as zero pounds, thirteen and a half pence?).TractorFactor said:If I kept the lamp on for weeks, months and it racked up ten pounds of cost, how would you write that when using 1.35p as a base? Because 10.1.35p isn't a value number that anyone sane would understand :PN. Hampshire, he/him. Octopus Go elec & Tracker gas / Shell BB / Lyca mobi. Ripple Kirk Hill member.
2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 30MWh generated, longterm average 2.6 Os.Taking a break, hope to be back eventually.Ofgem cap table, Ofgem cap explainer. Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs.2
Categories
 All Categories
 343K Banking & Borrowing
 250.1K Reduce Debt & Boost Income
 449.6K Spending & Discounts
 235.1K Work, Benefits & Business
 607.8K Mortgages, Homes & Bills
 173K Life & Family
 247.8K Travel & Transport
 1.5M Hobbies & Leisure
 15.9K Discuss & Feedback
 15.1K Coronavirus Support Boards