energy per day from a 5KW system?

 I am thinking seriously about installing a 5KW photovoltaic system.
It will be grid connected.
The area I live in averages 7.5 hours of sunshine per day (taken over a
100 year period.)

How much outpout in kilowatt-hours might I average per day, year round.

One reference says maybe 20kW-hours per day average over a year.

Can anyone suggest some links that might help answer the question?

  Think again on the 7.5 hours. Useful time is typically 3-4 hours unless you
gonna' track the sun.

Check sun chart calculators for real figures.

Is this a waste money project?


I am thinking seriously about installing a 5KW photovoltaic system.
It will be grid connected.
The area I live in averages 7.5 hours of sunshine per day (taken over a
100 year period.)

How much outpout in kilowatt-hours might I average per day, year round.

One reference says maybe 20kW-hours per day average over a year.

Can anyone suggest some links that might help answer the question?

 On 13/02/2010 1:20 PM, Josepi wrote:

Is this a waste money project?
Good question.
Where I live the government is providing a huge incentive.
The incentive is a gross feed in tariff at 3 times the retail price of a
kWh unit.

Why do you say useful time is typically 3-4 hours as opposed to say 4-5
hours or 2-3 hours?

 We have $0.81 / kWh incentive if the panels are located on the roof. Many
believe this is still barely a break even point. Depends on the system. What
is the investment loss on a $40K system with high maintenance costs?

3-4 hours per day is widely accepted, depending on where you want to
consider the "saw-off" point for the "worthwhile" power curve. You own
wishful stats post implies 4 hours average.

Prices have come down on panels, not much on batteries, some on management
equipment. Much depends on the system style.

Most, with experience will admit, "it's a hobby" unless from necessity (too
expensive to use grid).

Remember, the "installation experts" have something to sell.


Is this a waste money project?
Good question.
Where I live the government is providing a huge incentive.
The incentive is a gross feed in tariff at 3 times the retail price of a
kWh unit.

Why do you say useful time is typically 3-4 hours as opposed to say 4-5
hours or 2-3 hours?


On 13/02/2010 1:20 PM, Josepi wrote:
Think again on the 7.5 hours. Useful time is typically 3-4 hours unless you
gonna' track the sun.

Check sun chart calculators for real figures.
this a waste money project?

I am thinking seriously about installing a 5KW photovoltaic system.
It will be grid connected.
The area I live in averages 7.5 hours of sunshine per day (taken over a
100 year period.)

How much outpout in kilowatt-hours might I average per day, year round.
One reference says maybe 20kW-hours per day average over a year.

Can anyone suggest some links that might help answer the question?

 Try this calculator. It's been years since I have used it so not sure of the
validity, now

http://www.nrel.gov/rredc/pvwatts/


We have $0.81 / kWh incentive if the panels are located on the roof. Many
believe this is still barely a break even point. Depends on the system. What
is the investment loss on a $40K system with high maintenance costs?

3-4 hours per day is widely accepted, depending on where you want to
consider the "saw-off" point for the "worthwhile" power curve. You own
wishful stats post implies 4 hours average.

Prices have come down on panels, not much on batteries, some on management
equipment. Much depends on the system style.

Most, with experience will admit, "it's a hobby" unless from necessity (too
expensive to use grid).

Remember, the "installation experts" have something to sell.


Is this a waste money project?
Good question.
Where I live the government is providing a huge incentive.
The incentive is a gross feed in tariff at 3 times the retail price of a
kWh unit.

Why do you say useful time is typically 3-4 hours as opposed to say 4-5
hours or 2-3 hours?


On 13/02/2010 1:20 PM, Josepi wrote:
Think again on the 7.5 hours. Useful time is typically 3-4 hours unless you
gonna' track the sun.

Check sun chart calculators for real figures.
this a waste money project?

I am thinking seriously about installing a 5KW photovoltaic system.
It will be grid connected.
The area I live in averages 7.5 hours of sunshine per day (taken over a
100 year period.)

How much outpout in kilowatt-hours might I average per day, year round.
One reference says maybe 20kW-hours per day average over a year.

Can anyone suggest some links that might help answer the question?