How Much Power Does 3kW Solar System Produce?

How Much Power Does 3kW Solar System Produce?

Wondering how much power or electricity will a 3kW solar panel produce? So you my friend have come to the right place.

This is going to be a thorough guide on how much DC and AC power output you can expect from a 3kW solar system according to your location.

Also, I'm gonna share some tips on how you can get the maximum output from your solar panels.

Need a simple solution? Use my free online solar panel output calculator to find out the power output of your solar system. Or use the chart below to find out the estimated output

Solar Panel Output Calculator

Total Solar Panel System Size
Peak Sun Hours (Per Day)
Output in (Per Day, Month, Or A Year)

Note: Peak sun hours are not the total daylight hours. Click here to read about peak sun hours

How Much Power Does a 3kW Solar System Produce?

3kW solar system will produce about 12kWh of electricity or power per day, 360kWh per month, or 4,380kWh per year. Considering 5 hours of average peak sunlight per day.

Now let's discuss how many hours of peak sunlight your location receives and how to calculate.

How To Calculate Peak Sun Hours?

Peak Sun Hours

Only under standard conditions, solar panels will produce their rated wattage output.. which includes, 1kW/meter2 of sunlight intensity, 25oC temperature, no wind, and direct tilt angle.

That is why we consider peak sun hours as the baseline when estimating the solar system output.

The intensity of the sunlight will be different throughout the day like for example.

  • Noon: 1000 watt/meter2 sunlight intensity (1 peak sun hour)
  • late evening: 200 watt/meter2 sunlight intensity (0.2 peak sun hour)

To find out the total number of peak sun hours your location receives using this calculator.

Step 1: Enter Your Address

Step 2: Click Results

After selecting the result session you'll be able to see the number of peak sun hours per day, month by month.

These are the result from Florida city where i live. As you can see the average number of peak sun hours is about 5.87 or 5.87kWh/meter2 of solar radiations per day.

Average Solar Panel Output

you have a 3kw solar system so it should produce 3kWh in 1 peak sun hour? well, not exactly.

Yes, sometimes you'll receive 3kW of power output from your solar system but it will last for a few minutes.

Some days you may get more power output and some days it'll be lower. This will totally depend on the weather conditions.

and also there will be some power losses in DC cables and in charge controller.

Speaking from experience. on average, i receive about 70-80% output from my 400-watt solar panels per peak sun hour. This conclusion is based on 30 days of output data.

Related Post: Solar Panel Output Calculator – Average Solar Panel Output?

DC vs AC Output

Watch this video to understand the difference between DC and AC current

All the numbers which i have talked about above are DC output (Direct current).

Solar panels produce power in DC and also batteries store power in DC, in simple words lower voltage.

but most of our household appliances required AC (alternating current). so to convert DC into AC we use an inverter.

As nothing is perfect when it comes to solar power or electricity in general. Solar power inverters are not 100% efficient.

This means there will be some percent power loss when converting DC into AC. Most solar panels are about 90% efficient.

This means a 10% of power loss will occur when converting DC - AC.

Related Post: Solar DC Watts To AC Watts Calculator & Formula

How To Calculate Power Output Of The Solar System?

Here are simple steps to calculate the power output from your solar system.

i would take a 3kW solar system and my city as an example (Florida city). Which receives on average 5.8 hours of peak sunlight per day.

5.8 * 3000 = 17,400Wh

Now multiply the value by 0.8 to subtract the power losses.

17,400 * 0.8 = 13,920Wh (DC) 

Now let's convert the DC watt into AC, considering a 90% efficient inverter.

13,920 * 0.9 = 12,520Wh (AC)

in Florida, on average you'd receive about 14kWh DC and 12.5kWh AC power output from a 3kW solar system per day.

Related Post: What Can a 3kW Solar System Run?

3kW Solar System Output State By State - Chart

Here's a chart on how much power output you can expect from a 3kW solar system in your state.

State Average Peak Sun Hours (per day)Estimated Output From 3kW Solar System (per day)Estimated Output From 3kW Solar System (per month)Estimated Output From 3kW Solar System (per year)
Alabama5.3 hrs12.7 kWh381 kWh4572 kWh
Alaska3.3 hrs7.9 kWh237 kWh2844 kWh
Arizona6.2 hrs14.8 kWh444 kWh5328 kWh
Arkansas5.1 hrs12.2 kWh366 kWh4392 kWh
California5.8 hrs13.9 kWh417 kWh5004 kWh
Colorado5.9 hrs14.1 kWh423 kWh5076 kWh
Connecticut4.7 hrs11.2 kWh336 kWh4032 kWh
Delaware4.9 hrs11.7 kWh351 kWh4212 kWh
Florida 5.6 hrs13.4 kWh402 kWh4824 kWh
Georgia5.3 hrs12.7 kWh381 kWh4572 kWh
Hawaii5.0 hrs12.0 kWh360 kWh4320 kWh
Idaho5.1 hrs12.2 kWh366 kWh4392 kWh
Illinois6.5 hrs15.6 kWh468 kWh5616 kWh
Indiana4.7 hrs11.2 kWh336 kWh4032 kWh
Iowa4.8 hrs11.5 kWh345 kWh4140 kWh
Kansa4.5 hrs10.8 kWh324 kWh3888 kWh
Kentucky4.8 hrs11.5 kWh345 kWh4140 kWh
Louisiana5.4 hrs12.9 kWh387 kWh4644 kWh
Maine4.4 hrs10.5 kWh315 kWh3780 kWh
Maryland4.9 hrs11.7 kWh351 kWh4212 kWh
Massachusetts4.3 hrs 10.3 kWh309 kWh3708 kWh
Michigan 4.2 hrs10.0 kWh300 kWh3600 kWh
Minnesota4.5 hrs10.8 kWh324 kWh3888 kWh
Mississippi5.3 hrs12.7 kWh381 kWh4572 kWh
Missouri4.9 hrs11.7 kWh351 kWh4212 kWh
Montana4.4 hrs10.5 kWh315 kWh3780 kWh
Nebraska5.3 hrs12.7 kWh381 kWh4572 kWh
Nevada5.7 hrs13.6 kWh408 kWh4896 kWh
New Hampshire4.7 hrs11.2 kWh336 kWh4032 kWh
New Jersey4.7 hrs11.2 kWh336 kWh4032 kWh
New Mexico6.4 hrs15.3 kWh459 kWh5508 kWh
New York4.5 hrs10.8 kWh324 kWh3888 kWh
North Carolina5.2 hrs12.4 kWh372 kWh4464 kWh
North Dakota4.5 hrs10.8 kWh324 kWh3888 kWh
Ohio4.5 hrs10.8 kWh324 kWh3888 kWh
Oklahoma5.4 hrs12.9 kWh387 kWh4644 kWh
Oregan4.4 hrs10.5 kWh315 kWh3780 kWh
Pennsylvania 4.7 hrs11.2 kWh336 kWh4032 kWh
Rhode Island4.7 hrs11.2 kWh336 kWh4032 kWh
South Carolina5.3 hrs12.7 kWh381 kWh4572 kWh
South Dakota5.0 hrs12.0 kWh360 kWh4320 kWh
Tennessee4.9 hrs11.7 kWh351 kWh4212 kWh
Texas5.7 hrs13.6 kWh408 kWh4896 kWh
Utah5.4 hrs12.9 kWh387 kWh4644 kWh
Vermont4.3 hrs10.3 kWh309 kWh3708 kWh
Virginia5.0 hrs12.0 kWh360 kWh4320 kWh
Washington4.8 hrs11.5 kWh345 kWh4140 kWh
West Virginia4.5 hrs10.8 kWh324 kWh3888 kWh
Wisconsin4.5 hrs10.8 kWh324 kWh3888 kWh
Wyoming5.4 hrs12.9 kWh387 kWh4644 kWh
Chart - 3kW Solar System Output State By State

How To Get The Maximum Output From Your Solar System?

Before getting into how you can maximize the output performance of your solar panels. first of all, let’s discuss what factors affect the power output.

As i have discussed earlier. Only under specific conditions, a solar panel will produce their rated power output.

Other than those conditions there are some other factors that will affect the output.

Which includes...

  • Dirt or dust on the solar panels 
  • DC cable losses 
  • Charge controller inefficiency 
  • Tilt angle 

Which in the real world is rarely gonna happen. but we can do some steps to make sure that we’re getting the most from our solar system.

Here are some things which you can do to increase the output from your solar system. 

  • Clean your solar panels from time to time 
  • Use the right size DC cables
  • Keep the shorter distance between solar panels, the charge controller, and the batteries 
  • Install your solar panels at a right tilt angle (use this calculator to find out)
  • Use an MPPT charge controller 

Watch this video to check the effect of tilt angle on solar panels output. 

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I hope this short guide was helpful to you. still, have any confusion? LEAVE A COMMENT or contact us. Thank You!

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Chris Tsitouris is a renewable energy professional with 10+ years of experience as Director of Engineering at Solar Spectrum, previously working as Project Manager at SunPower and Energy Analyst at the National Renewable Energy Laboratory. As a thought leader, Chris has authored numerous articles and research papers.

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