{"id":375,"count":26,"description":"<p>AGM batteries (<em>Absorbent Glass Mat<\/em>) are sealed lead-acid batteries in which the electrolyte is absorbed into a fibreglass mat. This eliminates the risk of leakage and allows them to be installed in any position. They represent the most advanced lead-acid technology: maintenance-free, with greater resistance to vibration than flooded lead-acid batteries, and compatible with any conventional charger or MPPT regulator.<\/p>\n<h2>What is the difference between AGM, gel and open-lead batteries?<\/h2>\n<p>All three are lead-acid batteries and share the same chemistry; what differs is how the electrolyte is contained.<\/p>\n<ul>\n<li><strong>Open (flooded) lead:<\/strong> Liquid electrolyte. Cheaper per ampere-hour, but requires water topping up, ventilation and must be kept strictly upright. It still makes sense for large, fixed installations where maintenance is carried out.<\/li>\n<li><strong>AGM:<\/strong> Glass-fibre-bound electrolyte. Maintenance-free, it can handle high charge and discharge currents thanks to its low internal resistance, and withstands vibration well. It is the ideal choice for marine, motorhome and backup power systems.<\/li>\n<li><strong><a href=\"\/en\/product-category\/batteries\/gel-batteries\/\">Gel<\/a>:<\/strong> gel-filled electrolyte. It withstands deep discharges and sustained heat better, but allows a lower charging current. It is best suited to remote installations with low cycling rates and in hot climates.<\/li>\n<\/ul>\n<h2>How many cycles does an AGM battery last?<\/h2>\n<p>The cycle life of a lead-acid battery depends directly on the depth of discharge, and the relationship is not linear: discharging to 50 % rather than 80 % does not just give a slightly longer life, it gives well over double the life.<\/p>\n<p>The <strong>AGM Deep Cycle<\/strong> Victron cells guarantee a minimum of 500 cycles at 50 % discharge. The <strong>AGM Super Cycle<\/strong>, with thicker plates, achieve 750 cycles at 80 % discharge: a 50 % increase in service life, even when discharged much more deeply.<\/p>\n<p>In practical terms: if you\u2019re going to cycle it every day, size the bank so that it doesn\u2019t fall below 50 % and the battery will last for years. If you only need occasional backup, you can push it a bit further.<\/p>\n<h2>What AGM capacity do I need?<\/h2>\n<p>Take your daily consumption in ampere-hours and divide it by the depth of discharge you intend to allow. If you consume 60 Ah a day and want to stay within 50 %, you need at least 120 Ah of usable capacity, not 60.<\/p>\n<p>And add the factor that is most often overlooked in lead: the <strong>capacity depends on the discharge rate<\/strong>. A 100 Ah battery rated at C20 (20-hour discharge rate) does not deliver 100 Ah if you discharge it in 5 hours; it delivers considerably less. If your usage is intensive and short-term \u2014 such as an inverter powering heavy loads \u2014 you need to select a battery with a higher capacity than the catalogue specification.<\/p>\n<p>We have the following in our catalogue: <strong>AGM Deep Cycle batteries from 22 Ah to 240 Ah at 12 V<\/strong> y <strong>AGM Super Cycle in 125 Ah, 170 Ah and 230 Ah<\/strong>, all from <a href=\"\/en\/brand\/victron\/\">Victron Energy<\/a>.<\/p>\n<h2>How do you charge an AGM battery correctly?<\/h2>\n<p>With a three-stage charger and a specific AGM profile: <strong>bulk<\/strong> at constant current, <strong>absorption<\/strong> at a constant voltage for as long as it takes to complete the charge, and <strong>flotation<\/strong> reduced voltage for maintenance.<\/p>\n<p>The recommended charging current is between 10 % and 20 % of the rated capacity: for a 200 Ah battery bank, between 20 A and 40 A. Charging too quickly heats up the battery; charging too slowly prevents full absorption and causes the plates to sulphate.<\/p>\n<p>The <strong>temperature compensation<\/strong> It is not optional in south-eastern Spain: at temperatures above 25 \u00b0C, the absorption voltage must be reduced, otherwise the battery will gas and lose electrolyte, which cannot be replenished in a sealed AGM battery. The <a href=\"\/en\/product-category\/battery-chargers\/\">Blue Smart chargers<\/a>The <a href=\"\/en\/product-category\/solar-charging-regulators\/mppt-regulators\/\">SmartSolar MPPT controllers<\/a> and the MultiPlus and Victron inverters come with pre-configured AGM profiles and support a temperature sensor.<\/p>\n<h2>Should I choose AGM or lithium for my system?<\/h2>\n<p>The AGM continues to perform better in three scenarios: tight budgets, use as a backup with low cycling, and sub-zero temperatures where lithium batteries cannot be charged without a heater.<\/p>\n<p>The <a href=\"\/en\/product-category\/batteries\/12v-lithium-batteries\/\">lithium<\/a> It outperforms in every other respect: three to five times as many cycles, half the weight, it allows for almost complete discharge and can handle much higher charging currents, which, in a solar installation, means making better use of the middle of the day.<\/p>\n<p>Our approach: if the battery is cycled daily, the cost per lithium cycle works out lower, even if the initial investment is higher. If it\u2019s a backup system that operates four times a year, the AGM is the more sensible choice. Would you like us to work it out using your figures? Our <a href=\"\/en\/victron-support\/\">technical equipment<\/a> advises you.<\/p>","link":"https:\/\/fvcomponentes.com\/en\/categoria-producto\/baterias\/baterias-agm\/","name":"AGM Batteries","slug":"agm-batteries","taxonomy":"product_cat","parent":340,"meta":[],"menu_order":37,"_links":{"self":[{"href":"https:\/\/fvcomponentes.com\/en\/wp-json\/wp\/v2\/product_cat\/375","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\/340"}],"wp:post_type":[{"href":"https:\/\/fvcomponentes.com\/en\/wp-json\/wp\/v2\/product?product_cat=375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}