Fundamentals
Ohm's Law
Voltage, current & resistance
Inverter Calculator
Power & battery sizing
Voltage Divider
Resistor divider circuits
Pull-up / Pull-down
Digital logic resistors
Components
Resistor Color Code
Decode band colors
SMD Resistor Code
Surface-mount markings
Capacitor Code
Find capacitance values
LED Series Resistor
Current-limiting resistor
Wire & Networks
AWG Wire Gauge
American standard
SWG Wire Gauge
British/Indian standard
Star-Delta Conversion
3-phase networks
Power & Battery
Battery Backup Time
How long will it last
Battery Charging Time
Estimate charge time
Inverter Matching
Right inverter & battery
AC Load Calculator
Home power & cost
DC Load Calculator
Off-grid DC loads
Solar Calculator
Panel & battery sizing
Calculate the required inverter capacity (VA) and battery size (Ah) based on your appliance load and desired backup time.
Add the devices you want to run during power backup
Ceiling Fan
75W / each
Table Fan
50W / each
Room Cooler
250W / each
Laptop
65W / each
Desktop PC
250W / each
Printer
150W / each
LED Bulb
9W / each
Tube Light
40W / each
CFL
25W / each
Refrigerator
200W / each
Washing Machine
500W / each
Microwave Oven
1200W / each
Iron
1000W / each
Water Purifier
60W / each
LED TV (32")
80W / each
LED TV (40")
100W / each
LED TV (55")
150W / each
Set Top Box
25W / each
Music System
100W / each
AC (1 Ton, 3 Star)
1200W / each
AC (1.5 Ton, 3 Star)
1700W / each
AC (2 Ton, 3 Star)
2300W / each
AC (1 Ton, Inverter)
1100W / each
AC (1.5 Ton, Inverter)
1600W / each
AC (2 Ton, Inverter)
2100W / each
WiFi Router
15W / each
Mobile Charger
10W / each
CCTV System
50W / each
Exhaust Fan
40W / each
Water Pump (0.5 HP)
375W / each
Water Pump (1 HP)
750W / each
Mixer Grinder
750W / each
Set your desired run time and system parameters