How Much Power Does A 4.5 kW Solar System Produce? (kWh Calculator)

4.5kW is one of the more popular solar system sizes. As with any solar system, you will probably want to know how much power does a 4.5kW solar system produce. This is pretty easy to figure out; we will show you how to do it. To make things even easier, we have prepared these two very useful resources for 4.5kW solar system output production:

  1. 4.5kW Solar System kWh Calculator. The only input we need here is the peak sun hours. Based on that, the calculator automatically determines how many kWh will a 4.5kW solar system produce per day, per month, and per year.
  2. 4.5kW Solar System Power Production Per Day, Month, And Year Chart. We have calculated the 4.5kW electricity production per day, per month, and per year for both the sunniest locations (8.0 peak sun hours; think Arizona) to the cloudiest location (3.0 peak sun hours; think Alaska), and all in between. All the results are gathered in a chart further on.

Quick solar production ranges (detailed results are in the chart):

  • A 4.5kW system will produce anywhere from 13.50 to 36.00 kWh per day.
  • A 4.5kW system will produce anywhere from 405 to 1,080 kWh per month.
  • A 4.5kW system will produce anywhere from 4,928 to 13,140 kWh per year.
How Much Power Does A 4.5 kW Solar System Produce
4.5kW solar system usually consists of 15 300-watt solar panels. This system is able to generate 405 to 1,080 kWh per month, depending on the location (sun exposure).

Alright, estimating how much electricity can a 4.5kW system generate comes down to pretty much a single factor:

  • How much sun do you get?

We can describe our climate as “sunny”, “pretty sunny”, “cloudy”, “sunny in the summer, no sun in the winter”, and so on. To figure out the power generation of a 4.5 kilowatt system, we need to quantify how much sun you get. We do that by expressing “how much sun do we get” in terms of peak sun hours per day.

Peak sun hour is basically the amount of sunlight we have to get during the day to produce the solar panel specified amount of electricity. Across the US, we get (12-month average) anywhere from 3 (Alaska) to 7 (Arizona, New Mexico, Nevada) peak sun hours per day.

Here is how much electricity does a 4.5kW system generate, given different amount of sunlight (expressed by peak sun hours):

  • If you get 1 peak sun hour per day, 4.5kW solar panels will generate 4.5kW of electricity per day.
  • If you get 2 peak sun hours per day, 4.5kW solar panels will generate 9.0kW of electricity per day.
  • If you get 3 peak sun hours per day, 4.5kW solar panels will generate 13.5kW of electricity per day.
  • If you get 4 peak sun hours per day, 4.5kW solar panels will generate 18.0kW of electricity per day.
  • If you get 5 peak sun hours per day, 4.5kW solar panels will generate 22.5kW of electricity per day.
  • If you get 6 peak sun hours per day, 4.5kW solar panels will generate 27.0kW of electricity per day.
  • If you get 7 peak sun hours per day, 4.5kW solar panels will generate 31.5kW of electricity per day.
  • If you get 8 peak sun hours per day, 4.5kW solar panels will generate 36.0kW of electricity per day.

Get the gist of it? Now, by understanding these peak sun hours, we can quite easily determine the daily, monthly, and yearly kWh output of the 4.5kW system using these equations:

4.5kW Solar System Daily kWh Production = 4.5kW × Peak Sun Hours

4.5kW Solar System Monthly kWh Production = 4.5kW × Peak Sun Hours × 30 Days

4.5kW Solar System Yearly kWh Production = 4.5kW × Peak Sun Hours × 365 Days

Quick Example: Let’s say you want to install a 4.5 kW solar system in the great state of Florida. You need to check how many peak sun hours you get; you can look at this state-by-state average sunlight chart or consult the National Renewable Energy Laboratory irradiation maps here. Per state irradiance chart tells us that Florida gets 5.67 peak sun hours per day (yearly average). Let’s input that in these 3 equations like this:

4.5kW Daily kWh Production (Florida) = 4.5kW × 5.67 Peak Sun Hours = 25.52 kWh Per Day

4.5kW Monthly kWh Production (Florida) = 4.5kW × 5.67 Peak Sun Hours × 30 Days = 765.45 kWh Per Month 

4.5kW Yearly kWh Production (Florida) = 4.5kW × 5.67 Peak Sun Hours × 365 Days = 8,312.98 kWh Per Year

As we can see, the average kWh production of a 4.5kW solar system in Florida is 25.52 kWh per day, 765.45 kWh per month, and 8,312.98 kWh per year.

If we presume a $0.1400/kWh price of electricity in Florida (November 2022 EIA Florida prices), the 4.5kW system produces $3.57 per day, $107.16 per month, and $1,163.82 per year worth of electricity.

Alright, this was just one example using a bit of math. To make this calculation much easier, you can use the following 4.5kW Solar System kWh Calculator. You only need to input the average peak sun hours at your location/state (use the state-by-state chart or NREL map we referenced in the Florida example). Below the calculator, you will also find the calculated chart for 4.5kW production per day, month, and per year:

4.5kW Solar System kWh Calculator

 

This calculator is quite easy to use:

Let’s say you want to figure out how much electricity will 4.5kW solar system in California. By consulting the state-by-state peak sun hours chart, you can see that California (yearly average) gets 5.38 peak sun hours per day. Just slide the slider to ‘5.38,’ and you get the results:

A 4.5kW solar system in California will produce 5.83 kWh per day, 787 kWh per month, and 9,576 kWh per year.

Alright, let’s have a look at 4.5kW solar system production for all places; from 3.0 to 8.0 peak sun hours, summarized in this chart:

4.5kW Solar System Power Production Per Day, Month, And Year (Chart)

Peak Sun Hours: 4.5kW System Output Per Day (kWh/Day): 4.5kW System Output Per Month (kWh/Month): 4.5kW System Output Per Year (kWh/Year):
3.0 Peak Sun Hours 13.50 kWh Per Day 405 kWh Per Month 4,928 kWh Per Year
3.1 Peak Sun Hours 13.95 kWh Per Day 419 kWh Per Month 5,092 kWh Per Year
3.2 Peak Sun Hours 14.40 kWh Per Day 432 kWh Per Month 5,256 kWh Per Year
3.3 Peak Sun Hours 14.85 kWh Per Day 446 kWh Per Month 5,420 kWh Per Year
3.4 Peak Sun Hours 15.30 kWh Per Day 459 kWh Per Month 5,585 kWh Per Year
3.5 Peak Sun Hours 15.75 kWh Per Day 473 kWh Per Month 5,749 kWh Per Year
3.6 Peak Sun Hours 16.20 kWh Per Day 486 kWh Per Month 5,913 kWh Per Year
3.7 Peak Sun Hours 16.65 kWh Per Day 500 kWh Per Month 6,077 kWh Per Year
3.8 Peak Sun Hours 17.10 kWh Per Day 513 kWh Per Month 6,241 kWh Per Year
3.9 Peak Sun Hours 17.55 kWh Per Day 527 kWh Per Month 6,406 kWh Per Year
4.0 Peak Sun Hours 18.00 kWh Per Day 540 kWh Per Month 6,570 kWh Per Year
4.1 Peak Sun Hours 18.45 kWh Per Day 554 kWh Per Month 6,734 kWh Per Year
4.2 Peak Sun Hours 18.90 kWh Per Day 567 kWh Per Month 6,899 kWh Per Year
4.3 Peak Sun Hours 19.35 kWh Per Day 580 kWh Per Month 7,063 kWh Per Year
4.4 Peak Sun Hours 19.80 kWh Per Day 594 kWh Per Month 7,227 kWh Per Year
4.5 Peak Sun Hours 20.25 kWh Per Day 608 kWh Per Month 7,391 kWh Per Year
4.6 Peak Sun Hours 20.70 kWh Per Day 621 kWh Per Month 7,556 kWh Per Year
4.7 Peak Sun Hours 21.15 kWh Per Day 635 kWh Per Month 7,720 kWh Per Year
4.8 Peak Sun Hours 21.60 kWh Per Day 648 kWh Per Month 7,884 kWh Per Year
4.9 Peak Sun Hours 22.05 kWh Per Day 662 kWh Per Month 8,048 kWh Per Year
5.0 Peak Sun Hours 22.50 kWh Per Day 675 kWh Per Month 8,213 kWh Per Year
5.1 Peak Sun Hours 22.95 kWh Per Day 689 kWh Per Month 8,377 kWh Per Year
5.2 Peak Sun Hours 23.40 kWh Per Day 702 kWh Per Month 8,541 kWh Per Year
5.3 Peak Sun Hours 23.85 kWh Per Day 715 kWh Per Month 8,705 kWh Per Year
5.4 Peak Sun Hours 24.30 kWh Per Day 729 kWh Per Month 8,870 kWh Per Year
5.5 Peak Sun Hours 24.75 kWh Per Day 743 kWh Per Month 9,034 kWh Per Year
5.6 Peak Sun Hours 25.20 kWh Per Day 756 kWh Per Month 9,198 kWh Per Year
5.7 Peak Sun Hours 25.65 kWh Per Day 770 kWh Per Month 9,362 kWh Per Year
5.8 Peak Sun Hours 26.10 kWh Per Day 783 kWh Per Month 9,527 kWh Per Year
5.9 Peak Sun Hours 26.55 kWh Per Day 797 kWh Per Month 9,691 kWh Per Year
6.0 Peak Sun Hours 27.00 kWh Per Day 810 kWh Per Month 9,855 kWh Per Year
6.1 Peak Sun Hours 27.45 kWh Per Day 824 kWh Per Month 10,019 kWh Per Year
6.2 Peak Sun Hours 27.90 kWh Per Day 837 kWh Per Month 10,184 kWh Per Year
6.3 Peak Sun Hours 28.35 kWh Per Day 850 kWh Per Month 10,348 kWh Per Year
6.4 Peak Sun Hours 28.80 kWh Per Day 864 kWh Per Month 10,512 kWh Per Year
6.5 Peak Sun Hours 29.25 kWh Per Day 878 kWh Per Month 10,676 kWh Per Year
6.6 Peak Sun Hours 29.70 kWh Per Day 891 kWh Per Month 10,841 kWh Per Year
6.7 Peak Sun Hours 30.15 kWh Per Day 905 kWh Per Month 11,005 kWh Per Year
6.8 Peak Sun Hours 30.60 kWh Per Day 918 kWh Per Month 11,169 kWh Per Year
6.9 Peak Sun Hours 31.05 kWh Per Day 932 kWh Per Month 11,333 kWh Per Year
7.0 Peak Sun Hours 31.50 kWh Per Day 945 kWh Per Month 11,498 kWh Per Year
7.1 Peak Sun Hours 31.95 kWh Per Day 959 kWh Per Month 11,662 kWh Per Year
7.2 Peak Sun Hours 32.40 kWh Per Day 972 kWh Per Month 11,826 kWh Per Year
7.3 Peak Sun Hours 32.85 kWh Per Day 986 kWh Per Month 11,990 kWh Per Year
7.4 Peak Sun Hours 33.30 kWh Per Day 999 kWh Per Month 12,155 kWh Per Year
7.5 Peak Sun Hours 33.75 kWh Per Day 1,013 kWh Per Month 12,319 kWh Per Year
7.6 Peak Sun Hours 34.20 kWh Per Day 1,026 kWh Per Month 12,483 kWh Per Year
7.7 Peak Sun Hours 34.65 kWh Per Day 1,040 kWh Per Month 12,647 kWh Per Year
7.8 Peak Sun Hours 35.10 kWh Per Day 1,053 kWh Per Month 12,812 kWh Per Year
7.9 Peak Sun Hours 35.55 kWh Per Day 1,067 kWh Per Month 12,976 kWh Per Year
8.0 Peak Sun Hours 36.00 kWh Per Day 1,080 kWh Per Month 13,140 kWh Per Year

Now you can easily check how much electricity will your solar system generate if you know how many peak sun hours your location gets.

Example: You figure out that your location gets, on average, 5.2 peak sun hours per day. How many kilowatt-hours will a 4.5kW system installed there generate?

Just consult the chart: At 5.4 peak sun hours, a 4.5kW solar system generates 23.40 kWh per day, 702 kWh per month, and 8,541 kWh per year.

With the calculator above and this chart, you are now fully equipped to estimate the 4.5kW solar electricity production. If you need any help with the calculations, or if you have any suggestions for this article, you can use the comment section below, and we will help you out.

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