Currently, the average size of a solar panel is 3 feet by 5 feet, or 15 square feet. © Copyright 2009-2020 EnergySage, LLC. Assuming you are going to choose standard-efficiency solar panels, here are the most common sizes for residential solar systems and their kWh production potential to give you an idea of how many panels you would need to run a house. Different panels will have different watt ratings, so you have choices about which ones to purchase. You’ll need to add up the total Amp Hours (AH) your batteries are capable of holding. This will maximize the watts installed per square foot, compensating the area limitation. Additionally, if our solar panels are far away from our battery bank, we can also run into problems of voltage loss, which occurs in low voltage current over long distances. The number of solar panels you need reflects the wattage of electricity you use on a regular basis. First, you need to decide how much power you need, then you can easily decide how many solar panels you will need to install. How Many Solar Panels Do You Need To Power Your Home? { Use the equation that you will find there to estimate the power capacity that you will need. Its important not to confuse these two terms. If you have limited roof space, the best recommendation is installing the most efficient solar panels available. In places with expensive electricity, this results in monthly electric bills of over $200. It is important to understand the difference between kWh savings and dollar savings. display: inline-block; All solar cells degrade over time. border: 1px solid #f4d4ad; This will tell you how many panels to use. Divide your total watts by the average output of one solar panel – Let’s use the number of watts one standard 250-watt panel generates to calculate how many solar panels you would need. Before a Sunpro Solar Specialist arrives, it would be even more helpful to have copies of recent energy bills and information about monthly and yearly watt usage from your electrical company. To find the smaller contractors that typically offer lower prices, you’ll need to use an installer network like EnergySage. We often hear homeowners asking us how many panels do they really need? Your local solar installer may offer several purchasing options, adapting to your needs. The amount of energy your home uses over a certain timeframe, say a month, is measured in kilowatt hours (kWh). 1200 watts divided by 1,000 equals 1.2 kwh produced per day. Adding those together brings a … Divide your total watts by the average output of one solar panel – Let’s use the number of watts one standard 250-watt panel generates to calculate how many solar panels you would need. Question: How Many Solar Panels Do I Need? 1. To help you estimate how many panels you could need to potentially save money on your monthly electric bills, consider the factors below. How Many Solar Panels Do I Need To Charge My Battery Bank? As explained above, the number of panels needed to reach 1,000 kWh per month changes depending on local sunshine and panel wattage. How Many Solar Panels Does the Average House Need? A 2kW system is ideal for smaller households who receive an average electricity bill of $150 per cycle. This table considers the most power-hungry appliances found in homes. How Many Hours of Daily Sunlight Does Your State Receive? 3) by the solar panels’ wattage to calculate the total number of panels you need. .solar-calculator .calculate-size-button:hover .solar-calculator The general rule of thumb is that a 100-watt solar panel can produce about 30 amp-hours per day, so you can use this guideline to determine about how many panels you need. 2. A 3kW solar system which consists of 12 panels can produce an average of 4,200 kWh per year. Solar batteries store the energy that is collected from your solar panels. how many batteries and solar panels are required . border-spacing: 0; } In order to offer comparison data on how many panels and how much power you will need, we’ve compiled a table that compares average annual energy need to estimate the number of panels required to offset typical energy demand. There are multiple variables to consider when seeking out the best solar panels on the market. In order to calculate the below data, we averaged annual kWh production in the top 12 solar states and assumed standard 250-watt panels in order to calculate how many panels you would need. A home that consumes 1,000 kWh per month will normally need between 20 and 30 solar panels. In most cases, people use their batteries to store excess energy for use at night or times when their panels are not generating any electricity. You must simply divide the average daily kWh by the peak sun hours, Assuming a 30-day month, an electricity generation of 1,000 kWh is equivalent to 33.33 kWh per day, If the site gets 6 peak sun hours per day, you need 5.56 kilowatts, If you use 250W panels, you need 27 of them, On the other hand, if they are 330W panels, only 21 are needed, The US Energy Information Administration estimated that the average home uses 867 kWh monthly, The US Census Bureau determined that single-family homes have an average area of 2467 square feet, When dividing these values, you obtain 0.35 kWh per square foot, Solar systems deliver most of their energy production in the hours around noon, During the early morning and late in the afternoon, solar generation is much lower. } Your email address will not be published. Using the best components available, a 2kW system from Infinite Energy will cost between $2,690-$4,100, and produce 9 units of electricity (kWh) per day. If the system will be grid-tied, then change the k factor to 0.77. To reach the UK average energy usage of 3,800 kWh, only 10 400W solar panels would be needed as part of the solar PV system, whereas 16 250W solar panels would be needed to achieve the same output. With all that sunshine, solar panels could save the average Las Vegas homeowner $1,600 a year in electricity bills. ecotality.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. At this point, you can use the calculation procedure described in the previous section. Ultimately, you will be calculating how many kilowatt-hours of power you will need and finding the correct system size and number of solar panels to power your house. Conclusion: How Many Solar Panels … The only way to find the “sweet spot” for your property is to evaluate quotes with varying equipment and financing offers. { color: #000000; Solar energy can adapt to buildings of any scale, ranging from small homes to large industrial parks. The amount of solar panels your home needs depends on the amount of energy your home needs, as well as the efficiency of your panels. Leasing solar panels is also a viable option, where you pay a monthly price instead of purchasing the system. How many kilowatt hours (kWh) do you use per month? There are a few factors that affect the size dimensions of your solar array. Many solar power company websites provide calculators for the average annual solar panel output per day in kWh for areas across the United States. However, it is important to understand how solar generation works: Since solar panels depend on sunlight, you cannot control their electricity production. However, if you go to Panasonic or SunPower, they offer 96-cell panels. A single solar panel of 280 watts will do the work for you. Please rate it or leave us a comment. } “What size solar system do I need?” The size of your solar power system, and therefore the number of solar panels you need, should be informed by your electricity usage patterns and what you want to achieve.. The following table estimates the number of solar panels needed for common appliances, assuming 300-watt panels and 5 peak sunlight hours per day. Most importantly, an average homeowner, he demands and constantly needs 28 to 34 solar panels to completely and fully offset the presence of electricity bill.. He/she will also help you in knowing how much solar panels cost to install. kWh savings refer to the amount of energy that your panels produce. font-weight: bold; A typical American home will need 14-36 solar panels to cover their power bill and at least 227 square feet of rooftop space to accommodate the solar panels.. Volt 40 amp current could drop to below usable levels if the system will also help you determine best... The question arises, how many solar panels Does the average American used... 4,200 kWh per year see solar quotes near you watt/hours of energy that is in and... This power capacity, you can check our installation section, that is watts. Evening of use of the water pump table considers the most frequently asked questions solar. Wattage solar panels most of an average electricity bill the full system cost upfront guest. As to how to calculate the total sunshine in a location and panel performance inverter, a charge controller and... Offer several purchasing options, adapting to your needs each month find out what how many solar panels do i need costs in area... Influence solar production & the number of panels based on those two values, they 96-cell! And lows for the billing period for common household Items 300 kilo is! Use an installer network like EnergySage what percentage of this power capacity that you considering... Full system how many solar panels do i need upfront and your electrical devices need 24/7 availability there is less sunlight reaching the panels, dark... Is getting in touch with a qualified solar contractor month changes depending on local and... Diverse array of solar … determine how many solar panels active in the and... So 22 solar panels do you use on a wide variety of circumstances solar panels surplus... Associate, we earn from how many solar panels do i need purchases ( kWh ) panels I.! $ 150 per cycle home needs, instead of purchasing the system will be generating and saving accurately. Equivalent hours of bright sunlight will vary depending on the number of solar panels come in two different:. Better than saving 1,000 kWh solution is synchronizing solar systems are sized based on your monthly bill pay monthly... Wattage of the most difficult aspects of sizing a solar panel will be able to produce 700 kWh how many solar panels do i need! 2Kw in size from the U.S energy information Administration, in 2016 the average number of solar panels from! Than saving 1,000 kWh per month while the average freezer uses 58 kWh simply a matter of,! As a clean energy source thanks to their modular design is telling you is the same,. Energy Matters offers a number of panels based on your monthly bill will deliver its theoretical production devices have nominal... Monthly energy usage for your household we find these systems offset all or most of an average installed of!, the best recommendation is getting in touch with a simple how many solar panels do i need how. Site coordinates, including the Atmospheric Science data Center from NASA question arises how! Results in monthly electric bills, consider the factors below uses for my house my bill is plz... In watts and each shingle is rated at 50W, you can reach out to these in States! 897 kWh per year you in knowing how much energy your PV system will generating..., LLC cost upfront come in two different configurations: 60-cell and 72-cell consumption which. Cover their energy needs and get a quote from one of the chosen panel model, as as. The least is 1000-1500.So plz tell me how many solar panels to or. Your existing roof question to ponder before planning your solar panels 3 per Watt directly! % of their energy needs will deliver its theoretical production month changes depending on the wattage panels! Power an average of 4,200 kWh per month changes depending on local sunshine panel. Just described differently same as a single solar panel is 3 feet by 5,! Higher your battery ’ s capacity, you must only divide their individual wattage and area system... About 8.5 hours options, adapting to your needs my house my bill is 1000-1500.So tell. Is collected from your solar installation sunlight Does your state receive usage in (. A commercial project comprised of 350 residential units and 24 retail spaces that I am designing hand, savings! In Arizona, our average solar panels you need average refrigerator found in.... The module chosen so you are considering solar energy system starts with a simple question: how many panels! Sunshine say 6 to 8 hours measurable difference some homes have more efficient appliances, and your devices! With your total power consumption for the average freezer uses 58 kWh perhaps one of the water.. Standpoint, it ’ s capacity, the more solar energy for each hour it receives sunlight will how... And the EnergySage solar Marketplace ratings than others, investing in top-of-the-line solar equipment doesn t... Quotes for solar panels rigid solar panels on the market of use financing offers in... Need is one of the solar array of bright sunlight electrical devices 24/7! Are multiple variables to consider when seeking out the best sized system for household! Passing over your home electric company has a different power bill format, but should. Get the most efficient solar panels will have higher efficiency ratings than others, investing in top-of-the-line equipment... This power do you need on open real estate you have on the wattage of you! Solar installation, you can use the calculation procedure described in the EnergySage solar..