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.
घरेलू ऊर्जा नियोजन टूलकिट
सौर, EV और घरेलू ऊर्जा के मुफ़्त कैलकुलेटर
सरल ऑनलाइन कैलकुलेटर से सौर पैनल, EV चार्जिंग, बैकअप बैटरी, जनरेटर और ऊर्जा अपग्रेड की योजना बनाएं। चार्जिंग समय, सौर पेबैक, रनटाइम, जनरेटर आकार, नेट मीटरिंग बचत, हीट पंप लागत और अधिक।
कैलकुलेटर निर्देशिका
सही EV, सौर या बैटरी कैलकुलेटर चुनें
चार्जर, पैनल, बैटरी या पोर्टेबल स्टेशन खरीदने से पहले चार्जिंग समय, सौर आकार, बैटरी रनटाइम और बैकअप की तुलना करें।
मुख्य कैलकुलेटर
अधिक कैलकुलेटर — यात्रा, पेबैक, आकार और स्वामित्वअधिक ऊर्जा कैलकुलेटर
कैलकुलेटर खोलेंसूत्र नोट्स
हर कैलकुलेटर में पारदर्शी सूत्र
Battery runtime formula
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 panel sizing formula
solar kW = daily kWh / (peak sun hours x performance factor)Panel count rounds up from array watts divided by the selected solar panel wattage.
Battery backup formula
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.
परिदृश्य
चार्जर, पैनल, बैटरी या बैकअप खरीदने से पहले उपयोगी
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.
अक्सर पूछे जाने वाले प्रश्न
सामान्य प्रश्न
What information do I need to use these calculators?
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.
Why is EV charging time not just battery energy divided by charger power?
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.
How accurate is the solar panel calculator?
It is useful for early sizing. Real output depends on roof angle, shade, weather, inverter clipping, utility rules, and local permitting.
Can I use the results before buying equipment?
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.