EV charging time formula
wall kWh = battery kWh x SOC change / charging efficiencyCharging time divides wall energy by charger power. Cost multiplies wall energy by electricity price.
Kit de planejamento de energia doméstica
Planeie painéis solares, carregamento VE, baterias de reserva, geradores e melhorias energéticas com calculadoras online simples. Calcule tempo de carga, retorno solar, autonomia, potência de gerador, poupança de medição líquida, custos de bomba de calor e mais.
Diretório de calculadoras
Use estas calculadoras para comparar tempo de carga, tamanho de painel solar, autonomia de bateria e energia de reserva antes de escolher carregadores, painéis, baterias ou estações portáteis.
Notas de fórmulas
wall kWh = battery kWh x SOC change / charging efficiencyCharging time divides wall energy by charger power. Cost multiplies wall energy by electricity price.
runtime hours = capacity Wh x usable percent x inverter efficiency / load WStandby draw is included because small always-on loads matter during long outages.
solar kW = daily kWh / (peak sun hours x performance factor)Panel count rounds up from array watts divided by the selected solar panel wattage.
coverage days = usable battery kWh / max(0, daily load kWh - daily solar kWh)Solar production uses a conservative real-world performance factor for inverter and weather losses.
Cenários
Compare Level 1, Level 2, and DC fast charging assumptions before buying an EV charger.
Estimate whether a portable power station can run a refrigerator, router, CPAP, or workstation.
Size a rooftop solar array and battery bank before requesting installer quotes.
Model blackout coverage before buying batteries, panels, inverters, or generator backup.
Perguntas frequentes
Most estimates only need values you can find on an EV, charger, solar panel, battery label, or electricity bill: capacity, power, load, price, peak sun hours, and efficiency.
Charging has conversion losses, and real vehicles often taper charging near high state of charge. This calculator models the main loss factor and is best for planning estimates.
It is useful for early sizing. Real output depends on roof angle, shade, weather, inverter clipping, utility rules, and local permitting.
Yes. The calculators are designed for early planning and comparison. Always check product manuals, installer recommendations, utility rules, and local electrical codes before purchasing or installing equipment.