{"id":459,"count":22,"description":"<p>Solar panels for self-consumption are designed for installation on the roof of a house or industrial building connected to the electricity grid. They operate at high voltages, are connected in series to form strings, and feed a grid-tied or hybrid inverter which feeds the electricity generated directly into your home\u2019s electricity consumption.<\/p>\n<h2>What is the difference between a self-consumption panel and a 12 or 24V panel?<\/h2>\n<p>Voltage and size. A typical self-consumption solar panel has between 108 and 144 cells, delivers 400 to 600 W and operates at around 30\u201345 V. By connecting several in series, the 300\u2013600 V required by a grid-connected inverter is achieved, which significantly reduces the current and therefore losses in the cabling.<br \/>\nThat is why they cannot be used to charge a 12 or 24 V battery directly: that is what <a href=\"\/en\/product-category\/solar-plates\/solar-panels-24-v\/\">24V panels<\/a> with an MPPT controller.<\/p>\n<h2>How much power should I install?<\/h2>\n<p>In Spain, the general rule of thumb is that each kWp installed produces between 1,400 and 1,700 kWh per year, depending on the province, the orientation and the tilt. A home with an annual consumption of 4,000 kWh can be reasonably covered by 3 kWp; one with 8,000 kWh by 5 or 6 kWp.<br \/>\nOver-sizing without batteries leads to diminishing returns: the energy you generate in excess of what you\u2019re currently using is fed into the grid at a price far lower than what you pay. If you\u2019re going to install more capacity than you use at midday, consider a <a href=\"\/en\/product-category\/solar-inverters\/hybrid-self-consumption-inverters\/\">hybrid inverter<\/a> with <a href=\"\/en\/product-category\/batteries\/48v-lithium-batteries\/\">batteries<\/a>.<\/p>\n<h2>How they connect<\/h2>\n<p>The panels are grouped into series strings, and the number of panels per string is determined by the inverter\u2019s voltage range. This must be calculated using the open-circuit voltage on the coldest day of the year, because cold temperatures increase this voltage and exceeding the inverter\u2019s maximum rating will damage it.<br \/>\nIf your roof has partial shade or faces in different directions, consider using optimisers or an inverter with several independent MPPT trackers.<\/p>\n<h2>What else does the installation need?<\/h2>\n<p><a href=\"\/en\/product-category\/solar-plate-structures\/\">Structure<\/a> suitable for your roof \u2014tiles, metal sheeting, decking\u2014, solar cable, connectors, <a href=\"\/en\/product-category\/electrical-equipment\/surge-protection\/\">surge protection<\/a> continuous and alternating, and the <a href=\"\/en\/product-category\/solar-inverters\/self-consumption-inverters\/\">self-consumption inverter<\/a>. We are <a href=\"\/en\/brand\/fronius\/\">Fronius<\/a> System Partner and Authorised Service Centre in Spain.<br \/>\nTell us the property\u2019s annual energy consumption, the orientation of the roof and whether you\u2019d like batteries, and we\u2019ll suggest a configuration: <a href=\"\/en\/victron-support\/\">technical advice<\/a> free.<\/p>","link":"https:\/\/fvcomponentes.com\/en\/categoria-producto\/placas-solares\/placas-solares-autoconsumo\/","name":"Self-consumption solar panels","slug":"self-consumption-solar-panels","taxonomy":"product_cat","parent":395,"meta":[],"menu_order":29,"_links":{"self":[{"href":"https:\/\/fvcomponentes.com\/en\/wp-json\/wp\/v2\/product_cat\/459","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fvcomponentes.com\/en\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/fvcomponentes.com\/en\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/fvcomponentes.com\/en\/wp-json\/wp\/v2\/product_cat\/395"}],"wp:post_type":[{"href":"https:\/\/fvcomponentes.com\/en\/wp-json\/wp\/v2\/product?product_cat=459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}