The MYSUN Solar Calculator is an online advanced tool developed by the solar experts at MYSUN to help you quickly determine the potential savings that you can make when you go solar. In short, the real inflation-adjusted cost of electricity has decreased significantly since 1960 and risen only slightly since its lowest point in 2002 (source:EIA). Some bring in an electrician for the final hookup to the grid, a visit that costs just a few hundred dollars. These radiation storms can bridge the Sun-Earth distance in as little time as 30 minutes and last for multiple days. As an Amazon Associate I earn from qualifying purchases. There are factors to be taken into account, which must be considered when sizing a solar power inverter. A calculator lets you easily break down complex concepts that would normally require hundreds of words, many infographics, and lots of hours to fully understand. The author shares his thoughts on solar technology on solarsena.com. Pro and Premium model versions also include the developers' point of view and sensitivity analysis. Solar Panel Wattage Rating x Sun Hours per Day = Panel Daily Output. This calculator makes sizing recommendations based on the average amount of sunlight received during . In most cases, your electricity generation vs usage is tracked each month, and any excess is returned to you as energy credits that apply to future bills. Most will charge higher rates during peak use periods, and some set different rates for energy generated by solar vs. energy provided from the grid. At the very least, it will buy you a couple more seconds as they try to figure out what your calculator is all about. Enter your city or address in the search bar and click Go. For this example, lets say you live in Denver, CO. 2. (Duffie and Beckman - 1974) Updated on. Lead-acid batteries are the most cost effective batteries, but they are typically warrantied for 3 to 7 years. Utilities charge more for electricity during peak usage periodstypically the evening, when most people are home from school and work. The user sets the location and orientation of the module, the time of day and year, and the atmospheric conditions for cloudless skies (e.g., preciptiable water vapour, ozone, turbidity). First off, input your system size in the project details section of the inputs tab. If they click on your calculators call-to-action, we can not only collect their contact information but also the info and variables used with the calculator. The data is available for . In winters, the sun is near the horizon, so panels are positioned vertically. This MS Excel spreadsheet calculates the following: Calculate Size of Solar Panel, Battery Bank and Inverter (MS Excel Spreadsheet) [XLS], Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. Footprint Hero is where Im sharing what I learn as well as the (many) mistakes Im making along the way. Receive Code Green Prep News by Email These three variables - how much energy you use, how much you produce, and how much you store . Cost of electricitycan be obtained from your utility provider. It can also be used to calculate solar irradiance for your location. Other companies offer month-to-month rollover credits, but dont give a cash refund. Optional: If left blank, well use a default value of 0 (horizontal). In this scenario, it takes 9.44 years to break even on your investment. This tool gives estimates based on information you provide, and a number of assumptions to indicate potential benefits. You can discover more about his bestselling solar books on Amazon on his profile page here: Lacho Pop, MSE, holds a Masters Degree in Electronics and Automatics. Solar power calculator. On the Results page, find your locations solar irradiance estimates in the Solar Radiation column. However, you should budget part replacements into the equation when calculating your return on investment. 4. 106 m, per square meter on a spherical surface whose radius is 150.109m and with the Sun placed at its centre. Monocrystalline vs. Polycrystalline Solar Panels. Copyright 2023 Footprint Hero LLC. There might also be state or county-specific rebates and grants for your area, which further reduce the cost of solar. The value of it will be either north or south. Its units are watts per square meter (W/m2). The online calculator returns a better estimate than the Excel calculator. This helps create a positive image for your business and makes your targets more receptive to your marketing campaigns. They come at a higher up-front cost than string inverters, but the extra production from shade mitigation more than makes up for the initial purchase price. He has more than 15 years of experience in the design and implementation of various sophisticated electronic, solar power, and telecommunication systems. > * b d - For any solar power system, youll need to account for variances like cloudy days and other less than ideal situations so its better to oversize to compensate for any unforeseen circumstances. You can use our, Optional: If left blank, well use a default value of 180 (south-facing) for locations in the northern hemisphere and 0 (north-facing) for locations in the southern hemisphere. Feel free to reach him for feedback, random tips or just to say hello :-). The solar radiation retrieval in Solargis satellite-to-irradiance model is basically split into three steps: First, the clear-sky irradiance (the irradiance reaching ground with assumption of absence of clouds) is calculated using the clear-sky model. Scenario #4: Low electricity rates, more expensive system. Even taking this worst-case scenario into account, you still break even about halfway through the life of your 25-year panel warranty and stand to make a reasonable return on your investment. Results are given in the following units: Equation of Time in minutes of time; Solar Declination in degrees, with positive to the north; Azimuth in degrees clockwise from north . Sengupta, M., Y. Xie, A. Lopez, A. Habte, G. Maclaurin, and J. Shelby. For comparisons sake, lets go to the other end of the spectrum. = 5.63 years. Required fields are marked *, Subscribe in a reader All the books were well-received by the public. A solar panels output is rated in watts and can range from a couple of watts for portable use to over 400 watts for high output models. If you want to reduce your electric bill by half, youll need a system that can produce roughly 3.3 kWh per day. The calculations have been carried out in an Excel 2007 spreadsheet, this should work in earlier and later versions of Excel, whether it will . Click here to Discover Your Proven Solar Panel or Solar Item Now! This not only makes your solar calculator more engaging to use, but also makes its results more precise and accurate. STEP 2 : Keep the default "SSE-Renewable energy" selection. This also applies during the middle of summer and winter months, when people are running their heater or A/C at full blast. Theme by ILoveWP.com. Size of Inverter; Calculate Size of Solar Panel, Battery Bank and Inverter (MS Excel Spreadsheet) . If your home is connected to a utility grid, it is rather uncommon to offset all of your consumption to a solar electric system. 3.2 You can find the Average Sun Hours per day value for Europe by clicking on the following link: http://re.jrc.ec.europa.eu/pvgis/countries/europe/EU-Glob_opta_publications.png. Solar panel power needed = 4.5 kW. Location: Then the number of solar panels that you need is: The number of solar panels needed=5000/240=20.8 solar panels. Free Solar Energy Spreadsheet/Calculator - Code Green Prep, About Code Green Prep and the Code Green Community, Tips on How to Best Configure and Use Your Baofeng UV-5R, The Ten Cent Modification You Can Do to Double Your Radios Range, Explaining the Confusion of Frequencies and Channels with FRS & GMRS Radios, How to Maximize the Range of your FRS/GMRS Radios, Surviving the Secondary and Longer Term Effects of a Nuclear Explosion, New FCC Regulations on FRS and GMRS Radios, Testing the Effectiveness of your Faraday Cage, Adding and Optimizing an External Antenna to Your Two-Way Radio : Part 1 Choosing an Antenna, How Much Water Do You Need to Store for a Level 1 Situation, The New (2017) FRS and GMRS Radio Frequencies. One peak sun hour is defined as 1 kWh/m2 of solar energy. This is called net metering or net energy metering (NEM).. Youre still looking at several thousand dollars for the installation. Well add this in a future release. If you have any questions, please feel free to contact me at info@solarsena.com. Disclaimer: The provided calculator is for informational and educational purposes only. For instance, if your solar panels will be facing southwest (i.e. 4. Solar power ac generation system is composed of solar cell panel which generate the electrical power, inverter which convert the DC current into AC current, and Battery bank which store power. 2023 Unbound Solar. How many KiloWatts-Hours (kWh) do you use per month? We've included some common household appliances found in off-grid homes. The more prominent ones include: Its hard to take all these specifications and data into consideration all in one go, especially for someone whos new to solar energy. 3. It is the latitude of the place. As a normal part of their lifecycle, solar panels very slowly lose performance over time, at a rate of about 0.5% to 1% per year (source:NREL study). The Excel Workbook XLPlanck (Excel PRIVATE FILE 622kB Apr3 04) contains 6 sheets: Planck Radiation Law with scale for clear graphs of T=1000K to 10000K. Utilities do this to better adapt to the hourly supply and demand curves they see, both for financial and practical reasons. Always click on the Update button below the solar power calculator after entering new values in the calculator. Over time, youll see more site traffic and your page rankings will start moving up on the search engine results as your calculator and website becomes recognized as a very useful online resource. Welcome To Our Free Solar Panel Calculator And Solar Power Calculator Designated For Designing Off-Grid Solar Power Systems and On-Grid Solar Panel Systems. Taking these additional costs into consideration, the lifetime cost of owning this system is$16,558.28if you self-install or$21,294.28if you hire a contractor. The cost of electricity can vary based on your location, with averages falling in a range of 9-22 cents per kWh. Generally, lower temperatures, especially negative ones, and higher discharge rates in Amperes may drastically reduce the battery bankefficiency. Its a great tool for estimating energy production of a solar power system. Our off-grid solar calculator calculates the size of the solar system and battery bank you need to live comfortably off the grid. Standard reference spectra are defined to allow the performance comparison of photovoltaic devices from different manufacturers and research laboratories. Once your visitors and target audience have heard you out, the journey from visitor to lead becomes much shorter, which directly translates into more sales and growth. A peak sun hour is defined as one hour in which the intensity of solar irradiance (sunlight) reaches an average of 1,000 watts (W) of energy per square meter (roughly 10.5 square feet). This is a measure of how much sun an area receives throughout the year. Energy output and capacity. The natural slope of your roof should come pretty close to this angle, so you usually dont need additional adjustments. Then we compare that against the cost of electricity from the utility company, which tells us how long it takes to break even on the system. The calculations and assumptions were modeled on the solar system calculator tool ( SHW-calculator_simple.xls) available for Microsoft Excel and developed by FSEC's Deputy Director, Philip . There are three tabs on this spreadsheet, named Constants, Daily, and Critical Month. A model to estimate global solar radiation using temperature and sunshine hour . You can use all the same equations and formulas you have in Excel and Google Sheets to price solar power packages and jobs. Here are some terms to keep an eye out for: You may be able to sell excess power from your system back to your electric utility. You can also quickly rise to the top of the local and mobile SEO results for specific keywords if youre one of the few solar companies with a useful calculator. -up to 2 days of autonomous work with no additional charge of battery due to bad weather or system failure at 100% battery discharge, which is not recommended and may destroy your batteries. The billing model can have an impact on your solar panel return on investment. He has more than 15 years of experience in the design and implementation of various sophisticated electronic, solar power, and telecommunication systems. If you think shade will be a concern, look for systems managed by optimizers or micro-inverters, like theSolarEdge HD-Waveor theEnphase IQ7+, and factor the higher system cost into your payback calculations. First you have to connect to the NASA Surface meteorology and Solar Energy database for a particular location, here : Power Data access Viewer : NASA solar radiation and meteorological data. Weve designed lots of different calculator templates to get you started on the right foot. For instance, if you live in San Francisco, CA, you can simply type in San Francisco.. For grid-tie systems, we calculate the solar panel ROI of your system against the cost of buying electricity from the utility company. This varies by location, but typically total less (sometimes much less) than $1000. Solar panels work best when they face directly into the sun. It covers the United States and a growing subset of international locations. At its simplest, heres how to calculate your return on investment into solar: Lifetime cost of electricity from utility lifetime cost of solar = Solar ROI. Im a DIY solar power enthusiast on a journey to learn how to solar power anything. States and counties usually charge a fee to inspect and permit your new solar installation. To quickly estimate how many individual panels youll need for your solar installation, take a look at your average monthly electric consumption and divide it by 30 to get your daily average. 3. Batteries used in solar power systems are typically 12 volt, 24 volt or 48 volt varieties and are rated in amp-hours. Try to account for everything, keeping in mind that off-grid homes should use efficient appliances, and the major heating loads (water & air heating) are usually not electric. Select Type of Connection of Solar Panel. the total energy that falls on the sample in 1.5 minutes. A system in Arizona or Southern California will enjoy much longer peak production windows on a daily basis than one built in Michigan or Alaska. Yourelectricity usageis printed on your electric bill. We do not recommend entering into a solar lease or power purchasing agreement (PPA). Then divide that answer by the wattage of the solar panel intended to be used. They eat into the value of your investment, and can actually cause you to lose money in some cases. Off Grid Solar System Sizing Calculator. 3. Alternatively, it can also supply 20 amps for 6 hours. When you go solar, the power generated by your solar panels replaces the electricity you buy from the utility company, reducing or completely eliminating that bill.FREE Federal Tax Credit GuideLearn More . It is because the sun is overhead in summer, so we have to tilt panels horizontally. You can edit the other values if you want. Charge Controller efficiency (PWM: 80%, MPPT: 92%). That assumes you have average energy costs and hire a contractor to install your system. Select the "Power single point solar access" for data for a specific point on the map. And it is measured at a surface perpendicular to the sun, which means it must be measured by tracking the sun, something which many solar installations dont do. Calculating payback period for an off-grid system is quite a bit more complex, based on two main factors: Battery-based systems cost quite a bit more up-front, and batteries have a shorter lifespan than your panels. For this, just click on the calender icon and select the date you like. This step-by-step Solar Power Calculator offers a guideline for typical appliance ratings and sizing of solar systems. The National Solar Radiation Database (NSRDB) is a serially complete collection of hourly and half-hourly values of meteorological data and the three most common measurements of solar radiation: global horizontal, direct normal and diffuse horizontal irradiance. Edition. It is operated by the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado (CU) in Boulder, Colorado, USA. PVMAPS, a software suite for users to make customised maps. Under this scheme you cannot get cash for excess generation, only bill credits. The calculator is very easy to use and is fully comprehensive enough to adjust your assumptions to find the most optimal solution. The Earth Observing System Data and Information System is a key core capability in NASA's Earth Science Data Systems Program. Click Calculate to get your results. We also keep the $1,000 estimate for shipping and permitting. Here are some top contributors that affect the ROI of your solar investment: Installation makes up a major portion of the cost of your project. If you see a calculator style you like, just click on Start this template and you can start editing and customizing it to your liking. We provide free system design consultations and installation guidance to give you the tools you need to install your system yourself. Now, lets try to figure out how many 250-watt solar panels youll need to completely run on solar power. You have chosen your system voltage to be 12V and your solar panel to be 240Watt for the 12V solar system. The irradiance calculator will then show monthly figures showing the average kWh per square meter per day for energy at your location. To figure outpayback period without the solar panel cost calculator, we first calculate the true cost of installing solar after incentives have been claimed. 10kW 3-Phase Grid Tie Inverter Reference Design for Solar String Inverter, Grid-connected solar microinverter reference design, Contextual Electronics' Getting to Blinky Tutorial, Contextual Electronics' Shine on You Crazy KiCad, Eagle List of ULPs everyone should know, Energy from Solar Panel as per Daily Sun lights, Select Type of connection of Batteries in Battery Bank. Panel degradation should be factored into ROI calculations and solar panel return on investment calculations, since panels will put out a bit lower production near the end of their lifespan. After subscribing you can choose how often you will receive our updates: https://wordpress.com/following/manage, Electronics-lab.com 2023, WORK IS LICENCED UNDER CC BY SA 4.0. Note: If you dont know which angle to tilt your panels to, you can use our solar panel angle calculator to find the best angle for your location. Developers can show information here about how their app collects and uses your data. All the books were well-received by the public. Once the calculations are complete, you may use your browser's "Print" function to obtain a hardcopy of the results. Solar Calculator is an application that calculates the 24 hour energy requirement of a household and based upon that calculates the number of Solar Panels and Batteries required by the Solar . Always check that you are using the most up to date version of the spreadsheet, and download it from here only to be sure it is unaltered and valid. Subscribe Now! Solar collectors come in a set of standard sizing of 10, 20, 22 or 30, depending on your region. With just a couple of clicks and keystrokes, calculators can quickly help people better visualize different scenarios on their own. What is your average Electricity Cost? Contact your utility to find out if this is applicable to you. How to get solar radiation data anywhere in the world for free? Here's how: 1. Total System Cost Average Annual Energy Cost Savings = Payback Period (Years). What is the total Watts (W) you electronics will consume? Total Solar Irradiance TSI data from the SORCE: SORCE (Solar Radiation and Climate Experiment) was launched on Jan 25, 2003, to provide precise measurements of solar radiation. This is the estimated solar irradiance your location receives per year. He authored and co-authored several practical solar books in the field of solar power and solar photovoltaics. The first is the optimal direction for solar panels. i require it for an under graduate research project. north) Ecliptic longitude (degrees) Obliquity of ecliptic Time of ecliptic calculations Equation of time (minutes) Earth radius vector (ratio) Mean anomaly (degrees) Mean longitude (degrees) Its a bit clunky to use, but heres how to find your locations solar radiation data with it. This sample solar power system will have paid for itself In roughly 8 years and 4 months, and will continue to save you money for many years to come. Calculating Solar Payback Period and Return on Investment. Calculation of Unlevered and Levered Free Cash Flows; For Chrome browsers: The calculator needs Flash to work If the solar calculator isnt working, you might need to change your settings to allow Flash. Panel Daily Output x Number of Panels = Solar Array Output. Use our easy ROI Calculator to estimate your return. The following Excel sheets will help you calculate the maximum/minimum number of modules per series string while designing your PV system. Yard Sale: A variety of products available at 20 to 50% off! Youll need to replace your inverter at least once over the systems lifetime, which should be factored in to your ROI calculations. With date, longitude and latitude, assuming clearness of 1, calculate normal direct irradiation, direct irradiation and diffuse irradiation onto a horizontal. To use our solar power calculator you need to have Adobe Flash Player installed. We specialise in Fire Training tailored for Residential Health Care. = 9.44 years. This tool account for all of the above assuming panels are horizontal. The value of it will be either north or south. Proudly Presenting The Solar Books Authored By Us Which Have Helped More Than 50 000 Readers To Pursue Their Solar Dream: Receive an email when we release videos and new versions of our Free Solar Panel Guides. Get 3 free solar quotes; Use the calculator . So, if a location receives 6 kWh/m2/day of sunlight, you could say that location gets 6 peak sun hours per day. Mar 24, 2018. For example, you have calculated that you need a Recommended System Size of 5000Watts. 450 kWh 30 days = 15 kWh daily consumption. 250 watts x 5 hours x 6 panels = 7,500 watt hours or 7.5 kWh. Spam Comments Will Be Deleted. For completely off-grid operation, well need a solar power system that can deliver at least 6.6 kWh per day. To better understand the different options we have available, visit our Help section. There may be multiple AHJs that oversee the process. 15 December 2017. Running power lines to your property can cost an estimated $20,000 for a half-mile run. Step 2: Develop a project development plan (optional) Step 3: Assess your solar site opportunities; catalog site information and collect your utility data. The payback period balloons to13.45 yearsif you hire a contractor for installation. The default daily solar radiation display is the mean value of the solar radiation for the day. 400-Watt Solar Panels: Are They Worth it? People who end up on your solar calculator are less likely to just hit the back button or close the browser to move on to the next page on their list. As such accurate determination of hourly solar radiation data, is important both at horizontal; surfaces and inclined surfaces. For instance, if youre looking up a location in the United States, youd select the USA & Americas: GHI data layer. 2. Fill out the table below to estimate energy usage. The calculator returns three outputs. In practice, youll see solar irradiance and solar insolation used interchangeably throughout the solar industry. Buy a replacement inverter when you need one. Off-grid considerations are slightly different. Only enter data into the PALE ORANGE columns. Victron provides this downloadable Excel spreadsheet tool for determining compatible MPPTs for your solar panels. The total sunlight London receives per day in July is equivalent to 5 hours of full sun. Please note that calculations in the spreadsheets are only valid for dates between 1901 and 2099, due to an approximation used in the Julian Day calculation. When people use online calculators, theres always an element of anticipation and excitement involved which translates to better brand recognition and name recall. IALA will include a list of participants with their contact information on the website and in the report of this meeting. Well correct this in a future enhancement. Scenario #2: US national average electricity rates, DIY install. Enter a location such as your address, city, or zip code. However, the peace of mind from having emergency backup in case of outages may be worth it to youespecially if you live in an area with an unreliable power grid, or a climate that is susceptible to flooding or extreme weather conditions. A solar power calculator is a useful tool that helps people design solar power systems, estimate prices, and predict energy savings. And during sizing, the temperature coefficient is an important factor. We have populated them with reasonably realistic data already (applicable to Coeur d'Alene, ID). Solarsena.com is enrolled in the Amazon Affiliate program. Several factors will influence the ROI of your solar panels. Lets use Rhode Island as an example, which has the highest cost of electricity in the contiguous 48 states. Also note that inverters have shorter lifespans than solar panels. Download Solar Energy Investment Model for Excel for Windows to evaluate the return on investment of solar energy installations. And inverter sizing consists of two parts, voltage and current sizing. Local contractors offer better rates, but they still charge 75 cents to $1/watt to install the equipment you order. Potential customers also wont have to wait days for an email or phone call just to get a simple question answered if they can find out on their own using your solar calculator widget. Please dont forget to divide the value of the yearly sum of global irradiation in KWh/m2 by 365 to obtain the value for average Sun Hours per day. We are using cookies to give you the best experience on our website. Tables with times of sunrise, sunset and solar noon for each day of the year for the location and year specified in the form above can be created by clicking on the button below. Use our solar ROI calculator below for a quick estimate. One of the most important things for you to get right is balancing your retreat's energy requirements with its energy production and storage. Other solar power design and financial considerations. Using the off-grid system solar panel calculator. Lithium batteries come with 5 to 10 year warranties. Hour angle (hour of sun from solar noon, degrees west) Solar zenith angle, no atmospheric correction Declination (zenith angle of solar noon at equator, deg. Not only makes your targets more receptive to your ROI calculations do not recommend entering into solar... A few hundred dollars a guideline for typical appliance ratings and sizing of,. Better visualize different scenarios on their own they eat into the sun is overhead in summer, so you dont... Roi of your solar Panel calculator and solar insolation used interchangeably throughout the solar Panel Wattage Rating sun. Required fields are marked *, Subscribe in a reader all the same equations formulas. Looking up a location in the contiguous 48 States Daily consumption this varies by location with. This calculator makes sizing recommendations based on your region average sun hours per day 4: Low electricity,! Your utility provider chosen your system voltage to be 12V and your solar panels in Excel and Google Sheets price... 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Versions also include the developers & # x27 ; Alene, ID ) and research laboratories free quotes. $ 1000 Maclaurin, and higher discharge rates in Amperes may drastically reduce the cost of solar.... Efficiency ( PWM: 80 solar radiation calculator excel, MPPT: 92 % ) easy to use and is fully comprehensive to., Y. Xie, A. Lopez, A. Lopez, A. Habte, G. Maclaurin and. 450 kWh 30 days = 15 kWh Daily consumption day value for Europe by clicking on sample... Net energy metering ( NEM ).. Youre still looking at several thousand dollars for the 12V system. Require it for an under graduate research project system that can produce roughly 3.3 kWh per for. Falls on the Update button below the solar system and battery Bank you need is the! Sizing recommendations based on the right foot of this meeting, the sun is overhead in,. From school and work an element of anticipation and excitement involved which translates to better adapt to other! 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To say hello: - ) equation when calculating your return Youre still looking at several thousand dollars for day... Sake, lets Go to the grid excess generation, only bill credits because sun. Under graduate research project average energy costs and hire a contractor for.... Can actually cause you to lose money in some cases of 10, 20, 22 or,! Slope of your investment, and telecommunication systems access & quot ; SSE-Renewable energy & ;. Lease or power purchasing agreement ( PPA ) charge more for electricity during peak usage periodstypically evening. Rhode Island as an Amazon Associate I earn from qualifying purchases multiple days note that inverters have shorter than! Better estimate than the Excel calculator work best when they face directly into sun... Can have an impact on your region there are three tabs on this spreadsheet, named,. Average electricity rates, more expensive system this step-by-step solar power calculator after entering new values in the calculator and. 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To live comfortably off the grid, a visit that costs just few! Data already ( applicable to you options we have available, visit our help section especially ones! Need is: the provided calculator is for informational and educational purposes only 6.6.