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# having trouble figuring cost of kwh for a solar panel setup

## having trouble figuring cost of kwh for a solar panel setup

#1
10-16-14, 04:12 PM
Member
Join Date: May 2012
Posts: 14
having trouble figuring cost of kwh for a solar panel setup

In Seattle, we pay about 10 cents per kwh. I pay about \$100 a month for electricity, which gives me 1000 kwh a month used, right? Then these solar panel deals, they all start at around 10-12 panels, giving around at least a total of 300 kwh a day, which would give me 9000 kwh a month, which seems way too much. But I think my bill is average for Seattle. So why do these solar arrays all seem to generate so much more power than I need? I am confused!

#2
10-16-14, 04:21 PM
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 15,988
giving around at least a total of 300 kwh a day, which would give me 9000 kwh a month, which seems way too much.
I assume thats based on 24 hours of sun? Account for how many hours of sun a day. The panels only make peak power at certain times of day. Account for cloudy days. so many hours of sun..etc.

You have to do the math.

IMO you will pay the lease on those, and your electric bill, then your be paying more then \$100 a month..

#3
10-16-14, 05:08 PM
Member
Join Date: May 2012
Posts: 14
Actually the 300 kwh output is based on 5 hours of sun a day.

#4
10-16-14, 05:14 PM
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 15,988
whats the rental cost?

You dont get c recs(sp) right?

Do you get credits back end of yr from electric company?

Or do you just get off your bill monthy?

Do you think you will have a 0 electric bill?

Look on your bill it will tell you avg killowatts used in a month or what you used that month...

#5
10-16-14, 05:25 PM
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 64,605
12 panels at 250 watts average per panel is 3Kw per hour or 3KWH.
If you have 10 GOOD sunny hours per day then that's 30KWH for the day. Not sure where the 300 came from.

The 3Kw installation would be a fairly common size for an average home.
The 300KWH figure would be a more monthly estimate.

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