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Su posible ahorro consiste en comprar electricidad barata y utilizarla cuando comprarla sería más caro. La diferencia debe cubrir las pérdidas, los gastos adicionales y la inversión: almacenar energía no la produce.",{"type":623,"value":626},"\n\n",{"type":614,"tag":628,"attrs":629,"children":631},"h2",{"id":630},"funcionamiento-sin-placas",[632],{"type":623,"value":633},"Qué necesita una batería sin placas",{"type":623,"value":635},"\n",{"type":614,"tag":619,"attrs":637,"children":638},{},[639,641,650],{"type":623,"value":640},"Además de la batería, hacen falta un inversor-cargador compatible, protecciones, medición y un control que programe las cargas. El ",{"type":614,"tag":642,"attrs":643,"children":647},"a",{"href":644,"target":645,"rel":646},"https:\u002F\u002Fwww.victronenergy.com\u002Fmedia\u002Fpg\u002FEnergy_Storage_System\u002Fen\u002Fess-introduction---features.html","_blank","noopener noreferrer",[648],{"type":623,"value":649},"manual ESS de Victron",{"type":623,"value":651}," contempla sistemas sin generación fotovoltaica. Esa posibilidad técnica no implica que cualquier modelo o configuración comercial sirva.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":654,"children":655},{},[656,658,664],{"type":623,"value":657},"Pide que el presupuesto confirme carga desde la red, potencia disponible y funcionamiento cuando falla internet. Revisa la ",{"type":614,"tag":659,"attrs":660,"children":661},"nuxt-link",{"to":202},[662],{"type":623,"value":663},"documentación de instalación",{"type":623,"value":665}," con el profesional responsable; añadir placas posteriormente exige comprobar también la compatibilidad del conjunto.",{"type":623,"value":626},{"type":614,"tag":628,"attrs":668,"children":670},{"id":669},"tarifa-y-margen",[671],{"type":623,"value":672},"El margen depende de tu contrato",{"type":623,"value":635},{"type":614,"tag":619,"attrs":675,"children":676},{},[677],{"type":623,"value":678},"Utiliza los precios que realmente pagas en las horas de carga y evitas en las de descarga. Deben incluir los componentes variables aplicables, incluidos peajes, cargos e impuestos, con un criterio consistente. El precio mayorista por sí solo no representa ese coste.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":681,"children":682},{},[683,685,691],{"type":623,"value":684},"Comprueba cuotas, servicios, revisión de precios y permanencia. La ",{"type":614,"tag":642,"attrs":686,"children":688},{"href":687,"target":645,"rel":646},"https:\u002F\u002Fwww.cnmc.es\u002Ffacil-para-ti\u002Fque-hace-la-cnmc-para-consumidores\u002Fcomercializacion-y-suministro-electrico",[689],{"type":623,"value":690},"CNMC explica cómo comparar contratos",{"type":623,"value":692}," y acceder a su comparador desde el QR de la factura. Para una batería, completa la comparación con tu curva horaria y el consumo adicional de la carga.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":695,"children":696},{},[697],{"type":623,"value":698},"Con un mismo precio positivo durante todo el día, comprar electricidad para devolver menos después aumenta el gasto energético. Una tarifa variable puede ofrecer diferencias aprovechables, pero estas deben repetirse cuando tengas capacidad para cargar y consumo para descargar.",{"type":623,"value":626},{"type":614,"tag":628,"attrs":701,"children":703},{"id":702},"ejemplo-arbitraje",[704],{"type":623,"value":705},"Ejemplo: cuánto queda después de las pérdidas",{"type":623,"value":635},{"type":614,"tag":619,"attrs":708,"children":709},{},[710],{"type":623,"value":711},"Supongamos que entregas 6 kWh a la vivienda por operación, con un rendimiento total de ida y vuelta del 90 %. Compras a 0,10 €\u002FkWh y evitas compras a 0,25 €\u002FkWh. Son precios completos variables e hipótesis ilustrativas, no una oferta actual ni prestaciones garantizadas.",{"type":623,"value":635},{"type":614,"tag":714,"attrs":715,"children":716},"table",{"class":714},[717,741],{"type":614,"tag":718,"attrs":719,"children":720},"thead",{},[721],{"type":614,"tag":722,"attrs":723,"children":724},"tr",{},[725,731,736],{"type":614,"tag":726,"attrs":727,"children":728},"th",{},[729],{"type":623,"value":730},"Concepto por operación",{"type":614,"tag":726,"attrs":732,"children":733},{},[734],{"type":623,"value":735},"Cálculo",{"type":614,"tag":726,"attrs":737,"children":738},{},[739],{"type":623,"value":740},"Resultado",{"type":614,"tag":742,"attrs":743,"children":744},"tbody",{},[745,746,765,766,784,785,803,804,822],{"type":623,"value":635},{"type":614,"tag":722,"attrs":747,"children":748},{},[749,755,760],{"type":614,"tag":750,"attrs":751,"children":752},"td",{},[753],{"type":623,"value":754},"Energía necesaria para cargar",{"type":614,"tag":750,"attrs":756,"children":757},{},[758],{"type":623,"value":759},"6 ÷ 0,90",{"type":614,"tag":750,"attrs":761,"children":762},{},[763],{"type":623,"value":764},"6,67 kWh",{"type":623,"value":635},{"type":614,"tag":722,"attrs":767,"children":768},{},[769,774,779],{"type":614,"tag":750,"attrs":770,"children":771},{},[772],{"type":623,"value":773},"Coste de la carga",{"type":614,"tag":750,"attrs":775,"children":776},{},[777],{"type":623,"value":778},"(6 ÷ 0,90) × 0,10",{"type":614,"tag":750,"attrs":780,"children":781},{},[782],{"type":623,"value":783},"0,67 €",{"type":623,"value":635},{"type":614,"tag":722,"attrs":786,"children":787},{},[788,793,798],{"type":614,"tag":750,"attrs":789,"children":790},{},[791],{"type":623,"value":792},"Compra evitada",{"type":614,"tag":750,"attrs":794,"children":795},{},[796],{"type":623,"value":797},"6 × 0,25",{"type":614,"tag":750,"attrs":799,"children":800},{},[801],{"type":623,"value":802},"1,50 €",{"type":623,"value":635},{"type":614,"tag":722,"attrs":805,"children":806},{},[807,812,817],{"type":614,"tag":750,"attrs":808,"children":809},{},[810],{"type":623,"value":811},"Margen energético",{"type":614,"tag":750,"attrs":813,"children":814},{},[815],{"type":623,"value":816},"1,50 − (6 ÷ 0,90 × 0,10)",{"type":614,"tag":750,"attrs":818,"children":819},{},[820],{"type":623,"value":821},"0,83 €",{"type":623,"value":635},{"type":623,"value":635},{"type":614,"tag":619,"attrs":825,"children":826},{},[827,829,835],{"type":623,"value":828},"Con 250 operaciones idénticas al año, el margen sería ",{"type":614,"tag":830,"attrs":831,"children":832},"strong",{},[833],{"type":623,"value":834},"208,33 € anuales",{"type":623,"value":836},", calculado sin redondear los pasos intermedios. Si un servicio de control añadiese 60 € al año, quedarían 148,33 € antes de recuperar la inversión y de otros gastos. Las 250 operaciones son un supuesto: hay que justificarlo con datos horarios, capacidad, potencia y disponibilidad.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":839,"children":840},{},[841,843,848],{"type":623,"value":842},"Por cada kWh entregado, el margen es: ",{"type":614,"tag":830,"attrs":844,"children":845},{},[846],{"type":623,"value":847},"precio de compra evitado − precio de carga ÷ rendimiento",{"type":623,"value":849},". Con el ejemplo anterior, el umbral energético es 0,1111 €\u002FkWh; aún faltan desgaste y gastos. Si ambos precios fueran 0,20 €\u002FkWh, cada operación de 6 kWh perdería aproximadamente 0,13 € antes de esos gastos.",{"type":623,"value":626},{"type":614,"tag":628,"attrs":852,"children":854},{"id":853},"desgaste-y-garantia",[855],{"type":623,"value":856},"Los ciclos y la garantía también cuentan",{"type":623,"value":635},{"type":614,"tag":619,"attrs":859,"children":860},{},[861],{"type":623,"value":862},"Una operación parcial no equivale necesariamente a un ciclo completo. Para estimar ciclos equivalentes, divide la energía acumulada medida por la capacidad de referencia en el mismo punto de medida. Respeta la definición utilizada por el fabricante.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":865,"children":866},{},[867,869,875],{"type":623,"value":868},"Revisa años de cobertura, capacidad retenida, energía total admitida y usos autorizados. La ",{"type":614,"tag":642,"attrs":870,"children":872},{"href":871,"target":645,"rel":646},"https:\u002F\u002Fenergylibrary.tesla.com\u002Fdocs\u002FPublic\u002FEnergyStorage\u002FPowerwall\u002FGeneral\u002FWarranty\u002Fen-emea\u002FPowerwall-Warranty-EN.pdf",[873],{"type":623,"value":874},"garantía europea de Powerwall",{"type":623,"value":876},", por ejemplo, diferencia aplicaciones y límites de funcionamiento. No extrapoles sus condiciones a otra batería: la garantía no promete mantener la capacidad inicial ni recuperar el dinero invertido.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":879,"children":880},{},[881,883,889],{"type":623,"value":882},"El ",{"type":614,"tag":642,"attrs":884,"children":886},{"href":885,"target":645,"rel":646},"https:\u002F\u002Fwww.victronenergy.com\u002Flive\u002Fdrafts:dynamic_ess",[887],{"type":623,"value":888},"manual Dynamic ESS",{"type":623,"value":890}," incorpora un coste de uso de la batería al decidir operaciones. Si utilizas un coste por kWh para repartir su compra entre ciclos, evita contabilizar esa misma inversión dos veces en la evaluación final. Incluye degradación, consumos en espera y posibles sustituciones.",{"type":623,"value":626},{"type":614,"tag":628,"attrs":893,"children":895},{"id":894},"respaldo-y-potencia",[896],{"type":623,"value":897},"El respaldo tiene un valor diferente",{"type":623,"value":635},{"type":614,"tag":619,"attrs":900,"children":901},{},[902,904,909],{"type":623,"value":903},"Una ",{"type":614,"tag":659,"attrs":905,"children":906},{"to":49},[907],{"type":623,"value":908},"batería doméstica",{"type":623,"value":910}," no garantiza suministro durante un apagón. El sistema necesita una función de respaldo adecuada, aislamiento de la red y circuitos definidos. Pide potencia continua, capacidad reservada y tiempo de conmutación.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":913,"children":914},{},[915],{"type":623,"value":916},"Reservar energía para emergencias reduce la disponible para aprovechar precios. Tampoco des por hecho un ahorro en potencia contratada: debe poder reducirse el contrato sin comprometer el suministro cuando la batería esté descargada. Valora estos servicios por separado del ahorro en kWh.",{"type":623,"value":626},{"type":614,"tag":628,"attrs":919,"children":921},{"id":920},"preguntas-frecuentes",[922],{"type":623,"value":923},"Preguntas frecuentes",{"type":623,"value":635},{"type":614,"tag":926,"attrs":927,"children":929},"h3",{"id":928},"rentable-sin-tejado",[930],{"type":623,"value":931},"¿Puede compensar si no tengo tejado?",{"type":614,"tag":619,"attrs":933,"children":934},{},[935],{"type":623,"value":936},"Puede estudiarse cuando existe consumo en horas caras y un margen suficiente. Compara primero el cambio de tarifa y la programación de consumos, que pueden reducir la factura con menos inversión.",{"type":623,"value":635},{"type":614,"tag":926,"attrs":939,"children":941},{"id":940},"primero-placas",[942],{"type":623,"value":943},"¿Conviene instalar primero placas solares?",{"type":614,"tag":619,"attrs":945,"children":946},{},[947,949,954],{"type":623,"value":948},"Si dispones de una cubierta adecuada, compara ambas inversiones por separado. La ",{"type":614,"tag":659,"attrs":950,"children":951},{"to":223},[952],{"type":623,"value":953},"rentabilidad de una batería con placas",{"type":623,"value":955}," depende también del valor de los excedentes solares.",{"type":623,"value":635},{"type":614,"tag":619,"attrs":958,"children":959},{},[960],{"type":614,"tag":961,"attrs":962,"children":963},"small",{},[964],{"type":623,"value":965},"Revisado el 7 de septiembre de 2026. Los cálculos son hipotéticos y deben sustituirse por los datos del contrato y del proyecto.",{"type":623,"value":635},[],[],{"div":585,"p":970,"h2":971,"a":972,"nuxt-link":973,"table":585,"thead":585,"tr":598,"th":973,"tbody":585,"td":974,"strong":975,"h3":975,"small":585},17,6,4,3,12,2,[977,986,995,1004],{"id":978,"name":222,"slug":979,"uri":223,"shortDescription":980,"readingTime":598,"image":981},121,"son-rentables-baterias-solares","Cómo evaluar el ahorro adicional de una batería solar y recalcular la compensación mensual sin atribuirle el ahorro que ya daban las placas.",{"x1":982,"x2":983,"webpX1":984,"webpX2":985},"https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F121.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F121@2x.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F121.webp","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F121@2x.webp",{"id":987,"name":234,"slug":988,"uri":235,"shortDescription":989,"readingTime":598,"image":990},118,"tarifas-indexadas-autoconsumo","Qué revisar en una tarifa indexada con placas: fórmula, horarios de compra, cuotas, compensación de excedentes y escenarios de riesgo.",{"x1":991,"x2":992,"webpX1":993,"webpX2":994},"https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F118.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F118@2x.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F118.webp","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F118@2x.webp",{"id":996,"name":201,"slug":997,"uri":202,"shortDescription":998,"readingTime":598,"image":999},112,"normativa-baterias-autoconsumo","Requisitos y documentación de una batería de autoconsumo: qué debe justificar el instalador y qué conservar al terminar la obra.",{"x1":1000,"x2":1001,"webpX1":1002,"webpX2":1003},"https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F112.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F112@2x.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F112.webp","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F112@2x.webp",{"id":1005,"name":48,"slug":1006,"uri":49,"shortDescription":1007,"readingTime":598,"image":1008},47,"baterias","Cómo elegir una batería solar en España: capacidad útil, potencia, compatibilidad, respaldo y presupuesto completo, con las condiciones de garantía a la vista.",{"x1":1009,"x2":1010,"webpX1":1011,"webpX2":1012},"https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F47.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F47@2x.jpg","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F47.webp","https:\u002F\u002Fapi.solarplus.es\u002Ffiles\u002Fpages_featured\u002F47@2x.webp"]