{"id":1589,"date":"2018-03-16T22:27:09","date_gmt":"2018-03-16T22:27:09","guid":{"rendered":"http:\/\/localhost\/sigmify\/resources\/?p=1589"},"modified":"2025-03-12T06:38:04","modified_gmt":"2025-03-12T06:38:04","slug":"rooftop-solar","status":"publish","type":"post","link":"https:\/\/sigmify.com\/resources\/rooftop-solar\/","title":{"rendered":"Rooftop Solar  &#8211; why it makes sense"},"content":{"rendered":"<h1><span style=\"color: #09cfe6;\"><span style=\"color: #0ed2e8;\">Targets for Rooftop Solar<\/span>\u00a0\u00a0<\/span><\/h1>\n<p>Rooftop solar\u00a0 is the fastest-growing renewable energy sub-sector in India. It has achieved a cumulative capacity of\u00a01.3 GW\u00a0through March 2018.<\/p>\n<p>Source: Bloomberg New Energy Finance (BNEF) report.<\/p>\n<p>The per capita energy consumption in India is one third the world average and one hopes that Solar energy will improve the gap.<\/p>\n<p>The BNEF report said that India\u2019s 40-GW target for rooftop solar PV by 2022 represents a $23 billion investment opportunity. This has happened largely because rooftop solar power is now cheaper than commercial and industrial power in all major Indian states, according to BNEF.\u00a0 Costs have halved over the last five years. Overall, because of increased competition and low solar panel prices, setting up rooftop solar systems has become cheaper than the global average by between 39% and 50% in India.<\/p>\n<h1><span style=\"color: #0ed2e8;\">Rooftop Solar Financing<\/span><\/h1>\n<p>A new partnership between the World Bank and the State Bank of India (SBI),<\/p>\n<p>India\u2019s largest bank ensures that the market for rooftop solar has also begun to take off as financing is more readily available.<br \/>\n<img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-2168 alignright\" src=\"http:\/\/sigmify.com\/resources\/wp-content\/uploads\/2018\/11\/rooftop-solar-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/sigmify.com\/resources\/wp-content\/uploads\/2018\/11\/rooftop-solar-300x225.jpg 300w, https:\/\/sigmify.com\/resources\/wp-content\/uploads\/2018\/11\/rooftop-solar-768x576.jpg 768w, https:\/\/sigmify.com\/resources\/wp-content\/uploads\/2018\/11\/rooftop-solar-1024x768.jpg 1024w, https:\/\/sigmify.com\/resources\/wp-content\/uploads\/2018\/11\/rooftop-solar.jpg 1280w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>&#8220;Solar parks need land, and land is scarce in a densely-populated country,\u201d explains Simon Stolp, lead energy specialist at the World Bank in Delhi.<\/p>\n<p>\u201cRooftops, on the other hand, hold huge potential.\u201d<\/p>\n<p>The Ministry of New &amp; Renewable Energy has\u00a0<a href=\"http:\/\/www.thehindubusinessline.com\/news\/govt-proposes-rs-23450cr-scheme-for-rooftop-solar\/article9998955.ece\" target=\"_blank\" rel=\"noopener noreferrer\"><span class=\"s2\">proposed<\/span><\/a>\u00a0a new-look rooftop solar power incentive program that targets commercial, industrial, residential, and institutional consumers. Known as the Sustainable Rooftop Implementation for Solar Transfiguration of India (SRISTI), the program will have a financial support worth Rs 23,450 crore ($3.7 billion) from the government<\/p>\n<p>In a previous <a href=\"http:\/\/resources.sigmify.com\/resources\/who-are-the-solar-energy-players-in-india\/#.WqwXRRPwbUo\" target=\"_blank\" rel=\"noopener noreferrer\">Blog,<\/a> we listed the players in the Indian Solar ecosystem. Here we will look at the Solar EPC (Engineering, Procurement and Construction) companies who take up Solar Rooftop installations.<\/p>\n<p>Rooftop Solar is dependent on the following factors.<\/p>\n<h1><span style=\"color: #0ed2e8;\">Rooftop\u00a0 Construction<\/span><\/h1>\n<p>Ideal\u00a0 rooftop construction of concrete or some heavy material is ideal to take the weight of the panels and the inverter.\u00a0Rooftop solar PV plants are fairly heavy (about 30-60 Kgs\/m2).\u00a0A 100 kW off-grid\/hybrid inverter can weigh more than 1 tonne and occupy only a few square feet, creating a load of several hundred kilograms per square foot. Batteries can be heavy and may need installation on special beams or on the ground. Asbestos and other flimsy roof construction will not support the weight.<\/p>\n<h1><span style=\"color: #09bde6;\"><span style=\"color: #0ed2e8;\">Rooftop\u00a0 Area<\/span>\u00a0<\/span><\/h1>\n<ul>\n<li>Area of the rooftop that is free and available for installation of solar panels.\u00a0Typically, a 1 kWp system requires 100-130 sq.ft (or 10 sq.mt) .<\/li>\n<li>Area that is shade free . Shade reduces the efficiency of solar panels, by reducing the output from the panels.<\/li>\n<\/ul>\n<h1><span style=\"color: #0ed2e8;\">Number of Panels<\/span><\/h1>\n<p>The available rooftop solar area, decides the number of panels. Panel efficiency determines how well the panels will convert solar energy into electricity. This depends on the type and brand of panels\u00a0 installed. The higher the panel efficiency, fewer the panels needed. Clean panels regularly to maintain high efficiency. Most panels used for rooftops are Crystalline as Thin-Film modules require more installation area for the same capacity.<\/p>\n<h1><span style=\"color: #0ed2e8;\">Estimate energy generated<\/span><\/h1>\n<p>The number of panels will determine the electricity generated. The energy required depends on the wattage of the appliances normally connected.\u00a0Total energy requirement\/day (Wh) = Wattage of appliance * No. of appliances * Hours of working.<br \/>\nThe total energy requirement\u00a0 is multiplied by 1000 to get the kWh\/day rating.<\/p>\n<h1><span style=\"color: #0ed2e8;\">Decisions<\/span><\/h1>\n<p>Other equipment needed depends on what the user wants to do.<\/p>\n<ul>\n<li>Feed to the grid -this depends on the solar policy followed by each state.<\/li>\n<li>Night time usage determines set up of a battery<\/li>\n<li>Diesel generator as a backup. This means that the solar system needs to integrate with both the diesel generator and the grid.<\/li>\n<\/ul>\n<h1><span style=\"color: #0ed2e8;\">Inverter<\/span><\/h1>\n<p>Solar panels\u00a0 connect to the Inverter which converts direct current to alternating current to supply appliances. A 30-45% safety margin is used to\u00a0 calculate\u00a0 inverter size. Required Inverter size = Total Wattage of all appliances*(1+45%) . Inverters should be of good quality for maximum conversion. Most popular are solar string inverters. Inverters can also serve\u00a0 as a display and monitoring station, in which case they must be protected from rain and direct sunlight.<\/p>\n<h1><span style=\"color: #0ed2e8;\">Battery<\/span><\/h1>\n<p>A battery pack\u00a0 stores energy for night time usage and also helps in self consumption of energy.\u00a0\u201cDeep Cycle\u201d batteries\u00a0(generally lead-acid) are\u00a0 best suited for a solar PV system. They last for 5 to 10 years and are 80% efficient (can reclaim 80% of energy stored in it). These batteries\u00a0 provide electricity for long periods.<\/p>\n<h1><span style=\"color: #0ed2e8;\">Display and Monitoring<\/span><\/h1>\n<p>Inverters can serve\u00a0 as\u00a0 display and monitoring stations so they must be protected from rain and direct sunlight. Standalone monitoring and display stations\u00a0 connected to the inverter, display energy produced. They can be installed indoor for easier monitoring.<\/p>\n<h1><span style=\"color: #0ed2e8;\">Mountings<\/span><\/h1>\n<p>Rooftop solar panel mountings need to withstand wind pressure building up under the panels during storms.<\/p>\n<h1><strong><span style=\"color: #0ed2e8;\">Sources<\/span>:<\/strong><\/h1>\n<p>http:\/\/www.renewableenergyworld.com\/articles\/2017\/11\/rooftop-solar-in-india-is-a-23-billion-opportunity.html<\/p>\n<p><a href=\"http:\/\/www.solarmango.com\/rooftop-guidelines\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0http:\/\/www.solarmango.com<\/a><\/p>\n<p>http:\/\/www.worldbank.org\/en\/news\/feature\/2017\/12\/07\/india-transforms-market-for-rooftop-solar<\/p>\n<p><a href=\"http:\/\/www.eai.in\/ref\/ae\/sol\/rooftop\/cost\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.eai.in\/ref\/ae\/sol\/rooftop\/cost<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\t\t\t\tRooftop Solar is one of the fastest growing renewable energy sectors in India.\t\t<\/p>\n","protected":false},"author":6,"featured_media":2202,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"off","ocean_gallery_id":[],"footnotes":""},"categories":[22],"tags":[117,132],"class_list":["post-1589","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-industry","tag-rooftop-solar","tag-solar-installation","entry","has-media"],"_links":{"self":[{"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/posts\/1589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/comments?post=1589"}],"version-history":[{"count":10,"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/posts\/1589\/revisions"}],"predecessor-version":[{"id":7018,"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/posts\/1589\/revisions\/7018"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/media\/2202"}],"wp:attachment":[{"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/media?parent=1589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/categories?post=1589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sigmify.com\/resources\/wp-json\/wp\/v2\/tags?post=1589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}