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kwh cost

R

Rob

Jan 1, 1970
0
just wanted to make sure i'm computing this correctly. i just bought one of
those kill-a-watt energy monitoring devices and plugged in my honeywell air
cleaner that runs 24/7. it shows a kwh usage of .11. so i checked my
electric bill to figure out my rate. it doesn't show one rate, just a
breakdown.

distribution charge .02448
transition charge .00632
tramsmission charge .00624
energy conservation .00250
renewable energy charge .00050

total i get is .10022. does 10 cents per kwh sound right? if so, then my
air cleaner running on low costs me

..11 * .10022 * 24 *30 = 7.937424 a month. yes?
 
S

SQLit

Jan 1, 1970
0
Rob said:
just wanted to make sure i'm computing this correctly. i just bought one of
those kill-a-watt energy monitoring devices and plugged in my honeywell air
cleaner that runs 24/7. it shows a kwh usage of .11. so i checked my
electric bill to figure out my rate. it doesn't show one rate, just a
breakdown.

distribution charge .02448
transition charge .00632
tramsmission charge .00624
energy conservation .00250
renewable energy charge .00050

total i get is .10022. does 10 cents per kwh sound right? if so, then my
air cleaner running on low costs me

.11 * .10022 * 24 *30 = 7.937424 a month. yes?

I get 0.04004 using your numbers. Seems to me you miss placed the charge
for the energy. You have shown all of the stranded costs, not including
taxes which can be substantial in some places.
How long did you monitor the air cleaner? Run the recording for at least 24
hours. Makes the math easier.
Other than noted your math is right.
 
W

William P.N. Smith

Jan 1, 1970
0
Rob said:
so i checked my
electric bill to figure out my rate. it doesn't show one rate, just a
breakdown.

Take the total amount they bill you for and the total number of KWHR
you used and do the math. Trying to parse and allocate all the
bizarre charges will just give you a headache.
does 10 cents per kwh sound right?

Not wrong for many places, though the details will vary. Keep your
meter plugged in for a few days and see what the results are.
 
D

Danno

Jan 1, 1970
0
Rob said:
just wanted to make sure i'm computing this correctly. i just bought one
of those kill-a-watt energy monitoring devices and plugged in my honeywell
air
cleaner that runs 24/7. it shows a kwh usage of .11. so i checked my
electric bill to figure out my rate. it doesn't show one rate, just a
breakdown.

distribution charge .02448
transition charge .00632
tramsmission charge .00624
energy conservation .00250
renewable energy charge .00050

total i get is .10022. does 10 cents per kwh sound right? if so, then my
air cleaner running on low costs me

.11 * .10022 * 24 *30 = 7.937424 a month. yes?


I also have a Kill-A-Watt meter, I think the KWH measure is imperfect.
Most products have to be measured useing the VA rating, not the WATT
rating, to see their true consumption, which leads me to believe the KWH
reading may be suspect as well.
I'd say it is estimating low, but an easy way to check that would be to
compare the WATT reading against the VA reading and see if they are
similar. Things like lights and heating coils are, things like electronics
are not, in my experience.
 
M

m II

Jan 1, 1970
0
Danno said:
I also have a Kill-A-Watt meter, I think the KWH measure is imperfect.
Most products have to be measured useing the VA rating, not the WATT
rating, to see their true consumption, which leads me to believe the KWH
reading may be suspect as well.
I'd say it is estimating low, but an easy way to check that would be to
compare the WATT reading against the VA reading and see if they are
similar. Things like lights and heating coils are, things like electronics
are not, in my experience.


Well, as far as I know, residential meters read only watts. If your
power factor (watts/va) is bad, you don't pay a penalty. The power
company hates that, they have to supply the amperes but don't get paid
properly for doing so.

They have a point, though. On large installations, losing twenty
percent of income hurts. They penalize commercial users if the power
factor stinks.

VA is not indicative of true consumption. Watts are. Unfortunately,
the wires supplying the current have to be big enough for the VA load,
not just the Watt load.

http://www.kvarnrg.com/whatiselectricity/power_factor_optimization.htm


mike
 
J

James Baber

Jan 1, 1970
0
Jim Baber chipped in with:
I get 0.04004 using your numbers. Seems to me you miss placed the charge
for the energy. You have shown all of the stranded costs, not including
taxes which can be substantial in some places.

Actually I'll bet he just forgot to list the energy cost of .06018, which would
sound within reason and would then add to his total of .10022. Not a great rate,
but a lot better mine. PG&E is the worst in US.
How long did you monitor the air cleaner? Run the recording for at least 24
hours. Makes the math easier.
Other than noted your math is right.

I agree it looks OK.

--
Jim Baber
Email [email protected]


1350 W Mesa Ave.
Fresno CA, 93711
(559) 435-9068
(559) 905-2204 (A no charge Verizon IN cellphone to other Verizon IN accounts)
See our 10kW grid tied solar system at "www.baber.org"
 
J

James Baber

Jan 1, 1970
0
I think he should have said it uses .11 kW (this is a common misunderstanding of
terms)

a kWh is the Amount of power consumed in 1 hour.
Electric power is charged to the customer at so much per kWh. In this case he
says he is charged at a rate of $0.10022 for each kWh he uses in his home (assumed).

a kW is the rate that a device is using energy at any momentary point in time.
I believe that the Kill-A-Watt device is a Wattmeter, and Rob should have
stated that it was showing that it indicated .11 kW, which is equivalent to
110W. Just barely more than a 100W light bulb, not a refrigerator.
Is that 0.11Kwh per hour??
(Ouch.. That's enough juice to run another frig.)

A more accurate method is to let it run for a few hours

I believe he said it runs 24/7?
and then divide out the cumulative energy usage by the run time.




Hmmm, adding your numbers up all I get .040004.

I suspect you are missing a few things like
fuel and capacity costs..

Give your power company a call.. they'll supply the missing details.




You're getting close, but don't forget to add on the taxes.

An alternate method....Take your monthly energy bill, subtract out
any fixed customer charges, and then divide the result by the energy
usage.

--
Jim Baber
Email [email protected]


1350 W Mesa Ave.
Fresno CA, 93711
(559) 435-9068
(559) 905-2204 (A no charge Verizon IN cellphone to other Verizon IN accounts)
See our 10kW grid tied solar system at "www.baber.org"
 
J

James Baber

Jan 1, 1970
0
Danno wrote:
I also have a Kill-A-Watt meter, I think the KWH measure is imperfect.
Most products have to be measured useing the VA rating, not the WATT
rating, to see their true consumption, which leads me to believe the KWH
reading may be suspect as well.
I'd say it is estimating low, but an easy way to check that would be to
compare the WATT reading against the VA reading and see if they are
similar. Things like lights and heating coils are, things like electronics
are not, in my experience.

Jim Baber interjected:
This opens up a capability I was unaware of in the Kill-A-Watt meter I did not
know that it could do both the VA and the Watt measurements. It would be
interesting to which your utility is using to charge you, because you can see
the difference with the meter. that difference is the power factor for the
device and opens up a whole new ball game.

Email [email protected]


1350 W Mesa Ave.
Fresno CA, 93711
(559) 435-9068
(559) 905-2204 (A no charge Verizon IN cellphone to other Verizon IN accounts)
See our 10kW grid tied solar system at "www.baber.org"
 
M

Mike Swift

Jan 1, 1970
0
I have a "kill-a-watt" meter, and it reads volts, amps, kW, kWh, Vars,
and time. The one I have is very accurate. It reads within two or
three watts of a lab unit I tested it against. When Rob said it showed
a kWh usage of .11 kWh he did not specify over what time the measurement
was taken. If this unit is one of those that sit on a table top, and
have a small fan, then it may be about 5 watts. This would give about
..11 kWh per day.

Mike
 
M

Mike Swift

Jan 1, 1970
0
Sorry Tim, I did not have my Kill-A-Watt in front of me, and forgot
those measurements. The Kill-A-Watt meter is a fantastic instrument.
The only thing I wish it did that it doesn't is allow 220V measurements.

Mike
 
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