PV Gap

Eva Said:

How much energy does a solar panel produce?

We Answered:

A solar panel is going to produce from 5 to 10 Watts on a sunny day during peak sunlight.

Brandon Said:

How much energy does this particular solar panel produce?

We Answered:

Some great answers

123 max watts is per hour I live in an area that has 5.5 average sun hours per the solar insolation data which would give me a base of 676 watts produced per day for one panel.

That 123 watts is most likely STC or standard test conditions which is far from standard it is ideal 70 degrees Farenheit with a 1000 set flash

PTC or physical test conditions are not always on labels and are not always accurate because of varied conditions. Heat has a huge factor on PV production. The panels should be derated by for the following reason
ampacity correction or line loss
Temperature correction
PTC correction
Inverter loss
these corrections account for about 15 % on standard panels

Our 676 watts per day has been dropped to 574 watts per day per panel

Lets start with the light bulb. a standard 60 watt bulb uses 60 watts per hour. With the one panel we have chosen it would produce 5 hours and 45 minutes of illumination

If we switch to a 15w CFL we get 38 and one half hours of illumination

quite a difference yes

Central Air will use about 2000 to 2500 watts per hour.This rule is not hard and fast as units will vary as well as conditions

Lets use 2000 per hour times 8 hours of use is 16,000 watts we need 28 panels just for the ac. Probably another 28 for the rest of the house

Of course these panel must be true south at 15 degrees mounted

With a years worth of electric bills and a site visit I could come allot closer but lets say you need 60 of these panels

this system would provide 973kHw per month at my location of 5.5 sun hours per day

This would be a grid tied system as most state rebates require a grid tied system to qualify for rebates

Antonio Said:

How much energy does a 10kw solar panel produce a day?

We Answered:

In your other question (and the answer you like is totally wrong) you are confused between power and energy.

Watts are a unit of power, which is a rate of energy per second.

This is a difficult concept... look at watts as similar to miles per hour. So you can see that, just as miles per hour per hour is not too meaningful, so is watts (or kw) per hour or day or second is NOT meaningful.

Back to your question. Watts are a rate. the panel produces energy at the rate of 10000 joules per second. It does this as long as the sun hits it.

again, watts per hour or per day or per second has no meaning.



just remember:

watts (and kW) are a unit of power, energy per second, joules per second.

energy is in joules.

An alternate and confusing unit of energy is watt-hours (or kW-hours). This is watts multiplied by hours. Since watts are energy per unit time, watt-hours is similar to Joules, a unit of energy.

contact me if you still have problems.


edit, actually your original question is quite answerable, it's the addons that are incorrect. "QuestionHow much energy does a 10kw solar panel produce a day"

answer: 10 kW x 24 hours = 240 kW-hours of energy every day.
converting to Joules, that is 864 MJ. Either number is correct.


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Tracy Said:

How much energy does a 2 x 3 solar panel produce?

We Answered:

Check the manufactures specifications. The most efficient will be under 75 Watts. Even at 100% efficiency there is only about 500 watts in a panel that size. I assume your dimensions are in feet.