{"id":296,"date":"2024-07-20T10:56:49","date_gmt":"2024-07-20T15:56:49","guid":{"rendered":"https:\/\/eosloan.com\/blog\/?p=296"},"modified":"2024-07-20T10:56:50","modified_gmt":"2024-07-20T15:56:50","slug":"how-to-calculate-the-investment-and-return-on-investment-in-solar-energy","status":"publish","type":"post","link":"https:\/\/eosloan.com\/blog\/solar-energy\/how-to-calculate-the-investment-and-return-on-investment-in-solar-energy\/","title":{"rendered":"How to calculate the investment and return on investment in solar energy?"},"content":{"rendered":"\n<p>To determine the configuration of a solar photovoltaic system to serve a house with 5 rooms, 4 residents, 4 air conditioners, 3 computers, 3 televisions, and additional smart devices like tablets, we need to estimate the daily energy consumption.<\/p>\n\n\n\n<p><strong>1. Energy Consumption Assessment<\/strong><\/p>\n\n\n\n<p>1.1 Air Conditioners<\/p>\n\n\n\n<p>Assuming each air conditioner has a power rating of 1,500 watts and is used for 8 hours daily: 4&nbsp;units\u00d71,500&nbsp;W\u00d78&nbsp;hours=48,000&nbsp;Wh\/day=48&nbsp;kWh\/day<\/p>\n\n\n\n<p>1.2 Computers<\/p>\n\n\n\n<p>Assuming each computer has a power rating of 300 watts and is used for 8 hours daily: &nbsp;3&nbsp;computers\u00d7300&nbsp;W\u00d78&nbsp;hours=7,200&nbsp;Wh\/day = 7.2&nbsp;kWh\/day<\/p>\n\n\n\n<p>1.3 Televisions<\/p>\n\n\n\n<p>Assuming each television has a power rating of 100 watts and is used for 5 hours daily 3&nbsp;televisions\u00d7100&nbsp;W\u00d75&nbsp;hours=1,500&nbsp;Wh\/day=1.5&nbsp;kWh\/day<\/p>\n\n\n\n<p>1.4 Smart Devices (Tablets, etc.)<\/p>\n\n\n\n<p>Assuming an average of 1 kWh per day for additional smart devices: 1 kWh\/day<\/p>\n\n\n\n<p>1.5 Average Energy Consumption of Residents<\/p>\n\n\n\n<p>For lighting, kitchen appliances, and other electronics, assuming an average of 3 kWh per resident per day: 4&nbsp;residents\u00d73&nbsp;kWh=12&nbsp;kWh\/day<\/p>\n\n\n\n<p>1.5 Total Daily Energy Consumption of the household<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Air Conditioners: 48\u00a0kWh<ul><li>Computers: 7.2\u00a0kWh<\/li><\/ul><ul><li>Televisions: 1.5\u00a0kWh<\/li><\/ul><ul><li>Smart Devices (Tablets, etc.) : 1\u00a0kWh\u00a0<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>Average Energy Consumption of Residents (other electric services): 12\u00a0kWh<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Total = 69.7\u00a0kWh\/day<\/li>\n<\/ul>\n\n\n\n<p>1.6 Photovoltaic System Sizing<\/p>\n\n\n\n<p>1.6.1 Solar Panels Required<\/p>\n\n\n\n<p>Assuming an average solar insolation of 5.5 peak sun hours per day in Texas (source: <a href=\"https:\/\/www.energybot.com\/solar-panels\/texas\/\" target=\"_blank\" rel=\"noopener\">EnergyBot<\/a>): Energy&nbsp;required&nbsp;per&nbsp;day = 69.7&nbsp;kWh\/day<\/p>\n\n\n\n<p>Energy&nbsp;required&nbsp;per&nbsp;peak&nbsp;sun&nbsp;hour = 69.67 Kw\/ 5.5 hours <strong>\u2248 <\/strong>12.67 kW<\/p>\n\n\n\n<p>Assuming each solar panel has a power rating of 330 watts (0.33 kW):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Rounding up, we need 39 panels.<\/strong><\/li>\n<\/ul>\n\n\n\n<p>1.7 Storage System (Batteries)<\/p>\n\n\n\n<p>To support 40% of the energy demand during the night:<\/p>\n\n\n\n<p>Energy&nbsp;needed&nbsp;at&nbsp;night=69.7&nbsp;kWh\u00d70.40 = 27.88&nbsp;kWh<\/p>\n\n\n\n<p>Assuming each battery has a capacity of 5 kWh:<\/p>\n\n\n\n<p>Number&nbsp;of&nbsp;batteries&nbsp;required = 27.88&nbsp;kWh5 \/&nbsp;kWh\/battery <strong>\u2248 <\/strong>5.6&nbsp;batteries<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Rounding up, we need 6 batteries.<\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong>Configuration Summary<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar Panels: 39 panels of 330 W each<\/li>\n\n\n\n<li>Energy Generated Daily: Approximately 69.7 kWh<\/li>\n\n\n\n<li>Batteries: 6 batteries of 5 kWh each, providing a total storage capacity of 30 kWh<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"574\" src=\"https:\/\/eosloan.com\/blog\/wp-content\/uploads\/Savings-from-using-solar-energy-1024x574.jpg\" alt=\"\" class=\"wp-image-298\" title=\"\" srcset=\"https:\/\/eosloan.com\/blog\/wp-content\/uploads\/Savings-from-using-solar-energy-1024x574.jpg 1024w, https:\/\/eosloan.com\/blog\/wp-content\/uploads\/Savings-from-using-solar-energy-300x168.jpg 300w, https:\/\/eosloan.com\/blog\/wp-content\/uploads\/Savings-from-using-solar-energy-150x84.jpg 150w, https:\/\/eosloan.com\/blog\/wp-content\/uploads\/Savings-from-using-solar-energy-768x430.jpg 768w, https:\/\/eosloan.com\/blog\/wp-content\/uploads\/Savings-from-using-solar-energy.jpg 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>2. Investments assessment to implement the system<\/strong><\/p>\n\n\n\n<p>To estimate the investment required for a solar photovoltaic (PV) system in Texas, USA, with the configuration mentioned, we need to consider the costs of solar panels, inverters, batteries, mounting structure and cables, labor and installation, and other expenses. Let&#8217;s break down each component<a href=\"#_ftn1\" id=\"_ftnref1\">[1]<\/a>:<\/p>\n\n\n\n<p>2.1 Solar Panels<\/p>\n\n\n\n<p>Quantity: 39 panels of 330 W each<br>Price per panel: $250<br>Total cost of panels: 39 x $250 = $9,750<\/p>\n\n\n\n<p>2.2 Inverters<\/p>\n\n\n\n<p>Required power: 12.67 kW (considering a margin of safety, using 13 kW inverters)<br>Price per 13 kW inverter: $3,000<br>Total cost of inverters: $3,000<\/p>\n\n\n\n<p>2.3 Batteries<\/p>\n\n\n\n<p>Quantity: 6 batteries of 5 kWh each<br>Price per 5 kWh battery: $3,500<br>Total cost of batteries: 6 x $3,500 = $21,000<\/p>\n\n\n\n<p>2.4 Mounting Structure and Cables<\/p>\n\n\n\n<p>Estimated cost (approximately 10% of the cost of panels): 0.10 x $9,750 = $975<\/p>\n\n\n\n<p>2.5 Labor and Installation<\/p>\n\n\n\n<p>Estimated cost (approximately 15% of the total cost of equipment):<br>Total equipment cost: $9,750 + $3,000 + $21,000 + $975 = $34,725<br>Labor and installation cost: 0.15 x $34,725 = $5,208.75<\/p>\n\n\n\n<p>2.6 Other Expenses (Design, Homologation, Taxes, etc.)<\/p>\n\n\n\n<p>Estimated cost: $2,500<\/p>\n\n\n\n<p>Summary of Costs<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar Panels: $9,750<\/li>\n\n\n\n<li>Inverters: $3,000<\/li>\n\n\n\n<li>Batteries: $21,000<\/li>\n\n\n\n<li>Mounting Structure and Cables: $975<\/li>\n\n\n\n<li>Labor and Installation: $5,208.75<\/li>\n\n\n\n<li>Other Expenses: $2,500<\/li>\n<\/ul>\n\n\n\n<p><strong>Total estimated cost:<\/strong> $42,433.75<\/p>\n\n\n\n<p>This estimate provides a comprehensive view of the investment required for the solar PV system, considering the average costs in Texas. Adjustments might be necessary based on specific project conditions and current market prices.<\/p>\n\n\n\n<p><strong>3. Pay back assessment<\/strong><\/p>\n\n\n\n<p>To estimate the payback period for a solar photovoltaic (PV) system in Texas, we need to consider the cost of electricity, the household&#8217;s energy consumption, and the savings generated by the PV system.<\/p>\n\n\n\n<p>3.1 Annual Energy Consumption<\/p>\n\n\n\n<p>Based on the previous estimate, the daily energy consumption is 69.7 kWh.<\/p>\n\n\n\n<p>Annual energy consumption: 69.7 kWh\/day \u00d7 365 days\/year = 25,440.5 kWh\/year<\/p>\n\n\n\n<p>3.2. Average Electricity Price in Texas<\/p>\n\n\n\n<p>Electricity prices in Texas vary depending on the utility and the consumption tier. Let&#8217;s assume an average price of $0.12 per kWh (source: <a href=\"https:\/\/www.energybot.com\/electricity-rates\/texas\/index-v-a.html\" target=\"_blank\" rel=\"noopener\">EnergyBot<\/a>).<\/p>\n\n\n\n<p>3.3 Annual Savings with the PV System<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Annual savings:<\/strong> 25,440.5 kWh \u00d7 $0.12\/kWh = $3,052.86<\/li>\n<\/ul>\n\n\n\n<p>3.4 Calculating the Payback Period<\/p>\n\n\n\n<p>The estimated total cost of the PV system is $42,433.75.<\/p>\n\n\n\n<p>Payback period (in years): Total cost \/ Annual savings = $42,433.75 \/ $3,052.86 \u2248 13.9 years<\/p>\n\n\n\n<p><strong>Considerations<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Price Variation: Electricity prices may change over time, affecting the payback period.<\/li>\n\n\n\n<li>Maintenance and Performance: Proper maintenance and the efficiency of the solar panels over time will also impact the savings.<\/li>\n\n\n\n<li>Tariffs and Incentives: Check for any tax incentives, subsidies, or financing options that could reduce the initial investment cost.<\/li>\n<\/ul>\n\n\n\n<p><strong>Summary<\/strong><\/p>\n\n\n\n<p>Based on the estimated consumption and the average electricity price in Texas, the payback period for the investment in a solar PV system for the described household would be approximately 13.9 years. After this period, the savings generated by the system represent a significant financial return, in addition to contributing to environmental sustainability.<\/p>\n\n\n\n<p>The figures shown are estimates based on average market prices and may vary depending on the location, specific project conditions, and chosen vendors. It is always recommended to get detailed quotes from specialized companies for a more accurate analysis. Choosing the right equipment for your needs and the best contractors and investment solutions, make sure your integrator is registered on the EOS platform that makes your investment in solar energy more accessible and attractive (EOS Loan, 2024).<\/p>\n\n\n\n<p><strong>References<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"1\">\n<li>Defend Solar. Available at: <a href=\"https:\/\/defendsolar.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/defendsolar.org\/<\/a><\/li>\n\n\n\n<li>Electricity for Texas. Available at: <a href=\"https:\/\/electricityfortexas.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/electricityfortexas.com\/<\/a><\/li>\n\n\n\n<li>EnergyBot. Available at: <a href=\"https:\/\/www.energybot.com\/electricity-rates\/texas\/index-v-a.html\" target=\"_blank\" rel=\"noopener\">https:\/\/www.energybot.com\/electricity-rates\/texas\/index-v-a.html<\/a><\/li>\n\n\n\n<li>EnergyBot (Solar Panels in Texas). Available at: <a href=\"https:\/\/www.energybot.com\/solar-panels\/texas\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.energybot.com\/solar-panels\/texas\/<\/a><\/li>\n\n\n\n<li>EOS Loan. https:\/\/eosloan.com\/<\/li>\n\n\n\n<li>Solar Energy Industries Association (SEIA). Available at: <a href=\"https:\/\/www.seia.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.seia.org\/<\/a><\/li>\n\n\n\n<li>U.S. Energy Information Administration (EIA). Available at: <a href=\"https:\/\/www.eia.gov\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.eia.gov\/<\/a><\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><a href=\"#_ftnref1\" id=\"_ftn1\">[1]<\/a> Price base July 2024<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To determine the configuration of a solar photovoltaic system to serve a house with 5 rooms, 4 residents, 4 air conditioners, 3 computers, 3 televisions, and additional smart devices like tablets, we need to estimate the daily energy consumption. 1. Energy Consumption Assessment 1.1 Air Conditioners Assuming each air conditioner has a power rating of [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":297,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-296","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-energy"],"_links":{"self":[{"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/posts\/296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/comments?post=296"}],"version-history":[{"count":1,"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/posts\/296\/revisions"}],"predecessor-version":[{"id":299,"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/posts\/296\/revisions\/299"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/media\/297"}],"wp:attachment":[{"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/media?parent=296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/categories?post=296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eosloan.com\/blog\/wp-json\/wp\/v2\/tags?post=296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}