# house energy use?

Page 2 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.

#### PlasmaBomb

##### Lifer
At 0.5 HP the pump will draw maybe 500 W per hour of operation (Work done = 373 W). How long is it on for each time it cycles?

Assuming 30 secs per 2 minutes, thats 15 minutes work per hour. 4 Large 12 V 12 Amph batteries should give about 4hrs running. If that running time is correct the pump should only kill 3 kWh per day or 90 kWh per month?? Continuous operation would be 360 kWh per month (or I'm crediting it with far too much efficiency?)

#### ncage

##### Golden Member
Originally posted by: PlasmaBomb
At 0.5 HP the pump will draw maybe 500 W per hour of operation (Work done = 373 W). How long is it on for each time it cycles?

Assuming 30 secs per 2 minutes, thats 15 minutes work per hour. 4 Large 12 V 12 Amph batteries should give about 4hrs running. If that running time is correct the pump should only kill 3 kWh per day or 90 kWh per month?? Continuous operation would be 360 kWh per month (or I'm crediting it with far too much efficiency?)

Well buddy i will know soon if your calculations are accurate; when i get the kill-a-watt. Haha you know a lot more than i do because i didn't know how to turn h/p into watts. To tell the truth i REALLY don't need a 1/2 HP unit. I just bought it because i've had a few pumps go bad and i wanted something heavy duty. A 1/3 HP would be just fine. Maybe that would save me a lot. I don't know.

Ncage

#### BassBomb

##### Diamond Member
Just because you bought appliances in the last 5 years does not mean they are efficient at all, there is still a great parity between appliances.

Do you have the Energy Guide in USA too?

#### duragezic

##### Lifer
1 HP = 746 W

I'm not sure how the 1/3 HP would affect the cost to run it, even assuming it was the same efficiency. Would it need to run more often?

Anyway I moved into the first place I've ever had with A/C, and damn if my usage/bills are like some of you, I'm turning that crap off the rest of the summer!

Your 900+ kwh use by 1 or 2 people is not much less than four of us would use in college.

#### 0roo0roo

##### No Lifer
Originally posted by: ncage

OK some info about me so you can guage:
single
small house (1100 square feet).
3 computers (1 home server always on, 1 mostly in sleep but 3 hours a night, and 1 in hybernate but 3 hours a day)
1 DVR
50 in plasma tv (2 hours a night)
couple fans running throught the day (box & ceiling)
2 refrigerators (made within the last 5 years) 1 in basement where its always cool
1 deep freeze (2 years old) - in basement where its always cool
electric dryer (probably 3-4 loads a week)

killawatt? how much is the server sucking down. if its running 24/7 it matters. i use an old laptop for my home server needs, since they are made to use 30-40 watts. mine spends its time at 30. many regular pc's idle at ~100

use clothes line after a few minutes in the dryer to get rid of wrinkles, don't fully dry with dryer. hang clothes up with hangers since you already have to use hangers its not much harder.

killawatt would tell you if somethings like computer speakers were suckign down power even when off. many do...9-20 watts 24/7 i've found, logitech..klipsch, if that sub stays warm its suckin it down

#### CrimsonChaos

##### Senior member
I have a 3300 square foot house with central air throughout.

In winter months, my usage is in the 700's.
In the summer months my usage is in the 1100's.

Just giving you something to compare to.

#### Vette73

##### Lifer
Yea a sump pump should not need to run that much.

Have you also checked the check valve? Soem have it built into the pump, but my house it is int he water pipe like. Just a flap that lets the water pump out but not come back in.

Also is the pump adjusted correct? Turn the pump off and see if the water keeps coming up. I can get mine to run every 30minutes if I set the float level to low. But right now it only runs maybe once a day and then maybe every hour during a rain storm.

#### NoShangriLa

##### Golden Member
check the kw rating of all devices in your home then bring back the report.

Correct pump sizing is 120 sec run time vs pit size during high water table/raining season. Pump lifespan will greatly reduce if the it is over size due to high cycling rates (and increase energy usage). Check the float to make sure that it is adjust properly.

It might be wise to get a plumber to take a look at the pump & have it correctly size (pump curve vs. rate of fill & pit volume).

good luck!