How Many Solar Panels Do I Actually Need?
- Jacob Foster
- Feb 15, 2021
- 6 min read
How Many Solar Panels Do I Actually Need?
We get a lot of questions from potential clients about how many solar panels are needed for their homes. Unfortunately, the answer isn’t cut-and-dried. How many solar panels to use on your house depends on your goals, your house and your budget.
Most people go solar to reduce their electric bills and to improve their environmental impact. After last summer’s crazy high temps and shockingly high electric bills, we can understand how you might be motivated to go solar. Luckily, now is a great time of year to start your decision making process.
But figuring out how many panels you need on your house isn’t necessarily an easy task. How many panels you have on your house directly impacts the cost of the system and amount of power produced.
We should say right up front that Fusion Power will do all of the relevant calculations for you when we assess your house for a new solar system. But we also know there are lots of people out there who like to educate themselves before they make a major decision like installing solar panels on a house. Here’s how to do your own rough calculations:
Calculating How Many Solar Panels You Need
First you will need to calculate your hourly electrical usage. You can find the monthly usage on your electric bill and divide by 30 to get a daily average, then divide by 24 to get your hourly average. However, we do know the average electricity consumption in Arizona is 1061 kWh per month, according to ElectricityLocal.com, making average daily usage about 35kWh and hourly use 1.45kWh. There are 1000 watts per kW, so multiply that by 1000 to get the number of watts: 1450 watts/hour.
Next figure out how much sun your panels will receive. Thankfully you won’t need to stand outside all day to calculate this number. The National Renewable Energy Lab notes peak sun lasts for about 6.5 hours a day on average in Phoenix. (That number can fluctuate greatly, from 4.5 hours in December, to 8.08 hours in June.)
Decide how much of your total power you would like to come from solar. For this exercise, we’ll say 100 percent. If you were to go with a lower number, say 80 percent, you would multiply the final number below by .8.
Now, let’s do some math! Multiply your hourly energy usage by the average peak sunlight hours, then divide that by the panel’s wattage. In this case we will assume the panel is 330 watts. 1450 x 6.5 / 330 = 28.5 panels
Solar Panel Efficiency and Cost
Please keep in mind these numbers are just to show you how to make these calculations. Obviously you will need to use your own household numbers to get a more accurate calculation. You will also need to decide how efficient you want your panels to be. Some panels cost less but you will also have lower efficiency. Higher-efficiency panels obviously will cost more. Efficiency numbers, however, will play a direct role in how long the panels will take to pay for themselves.
The other thing we will help you consider when planning your solar panel system is how many panels will fit on your roof in an efficient manner. Many different factors can contribute to this. If you have lots of different roof angles you may not be able to fit all of the panels you need to generate all of your electricity needs. Your roof may be shaded by a tree or a neighboring building.
Let Us Calculate Your Solar Needs For You
Don’t worry if you’re not comfortable with the math. It can get confusing trying to figure out what the optimal system should be. That’s why we’re here to help. Give us a call at 480-676-1433 or email contact@fusionpowerco.com and we can give you a free analysis on requirements and costs of a solar panel system for your home. situs togeltoto slotrtp slotsitus totobo togelsitus totositus totositus togelbo togelpam4dsitus togeltoto togelsitus togelsitus togelbento4dsitus togelbento4dsitus togelpam4dsitus totopam4ddaftar pam4ddaftar pam4dlogin bento4dcerutu4dcerutu4dcerutu4dsitus totositus togelsitus totositus totositus togelsitus totositus totositus togelsitus togeltoto togelsitus totositus togelsitus togel resmitoto slotsitus totositus togelsitus totositus togelsitus totositus totositus togelsitus toto slotcerutu4dsitus totocerutu4dsitus totogimbal 4ddaftar gimbal4dgimbal4dtoto slotsitus totositus totototo slotsitus totositus totototo togeltoto slotsitus togellive casinototo slottoto togelbandar togelsitus totositus totositus togelsitus totositus totobakautotositus bandar togelbakautoto situs resmi toto togelbakautoto situs toto togel terpercaya 2024monperatotomonperatotomonperatotomonperatotomonperatotomonperatotositus togelsitus totositus totositus totositus totobo toto pulsabo totobo toto pulsabo togelbo togelbo togelbo togelcerutu4dbo togelbo totositus togelsitus togelsitus totositus totositus togelbakautotositus togelbakautotositus togelsitus totositus togelbo togelsitus togelbandar toto macautogel pulsabo togelDaftar Situs Totositus totositus totositus totositus totositus totositus togelsitus togelsitus totositus tototogelsitus totositus lotre
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