Solar Load Calculator
Add your household appliances to calculate connected load, daily electricity use, approximate solar system size, panel count and inverter capacity. Designed for practical planning in Pakistan and India.
Calculate Your Solar Load
Enter appliance wattage, quantity and estimated daily running hours. The calculator separates peak connected load from daily energy consumption.
Peak sun hours vary by location, season, tilt, shading and weather. System losses are editable so you can use a value appropriate for your proposed installation.
Inverter sizing here is a planning estimate based on running load. Motors, pumps, compressors and air conditioners can have startup or surge requirements that must be checked separately.
How to Use the Solar Load Calculator
Start by listing the appliances you expect to run. Enter each appliance's power in watts, quantity and approximate daily running hours. The calculator uses these values to determine both connected electrical load and daily energy use.
Next, enter your planned solar panel wattage, local peak sun hours and an estimated system-loss percentage. These inputs are deliberately editable because solar production varies by location and system design.
Solar Load Calculation Formula
Connected load and energy use answer different questions. A 1,000-watt appliance contributes 1,000 watts to connected load while it is running, but its daily energy depends on how many hours it operates.
How the Solar System Size Is Estimated
This is a simplified planning method. Peak sun hours are not the same as daylight hours. They represent the equivalent number of hours of strong solar irradiance used for energy estimation.
For a more site-specific production estimate, location, tilt, azimuth, weather data and other system characteristics should also be considered.
How Many Solar Panels Do I Need?
The calculator rounds the result upward to a whole panel. If your estimated solar requirement is 4.1 kW and you choose 550-watt panels, the page uses enough complete panels to meet or exceed that calculated DC array size.
Solar Load Calculator for Pakistan
Pakistan users can use this calculator for common household loads such as ceiling fans, LED lights, refrigerators, televisions, air conditioners, water pumps and computers. For best results, replace the example wattages with the ratings shown on your own appliances.
Solar availability differs between cities and seasons, so the peak-sun-hours field is not locked to one Pakistan-wide value.
Solar Load Calculator for India
The same load and energy formulas can be used for homes in India. Enter actual appliance wattage and daily operating time, then use a peak-sun-hours assumption suitable for your location and proposed PV system.
This makes the calculator useful for early system planning without claiming that every Indian city has identical solar production.
Frequently Asked Questions
What is a solar load calculator?
A solar load calculator estimates the electrical load and energy use of appliances so you can make an initial estimate of solar array and inverter requirements.
How do I calculate daily electricity consumption?
Multiply appliance watts by quantity and daily running hours. Add all appliance watt-hours together and divide by 1,000 to get kWh per day.
How many solar panels do I need?
First estimate the solar array size required to supply your daily kWh. Divide the required solar watts by the wattage of one panel and round upward.
Why can I edit peak sun hours?
Solar resource changes by location, season and site conditions. An editable input is more useful than assuming one fixed value for all of Pakistan or India.
Does connected load equal daily energy use?
No. Connected load is the power of appliances that may run at the same time. Daily energy use also depends on how long each appliance operates.
Can this calculator choose my final inverter?
It provides a running-capacity estimate with editable headroom. Motors, pumps, compressors and some air conditioners can require additional startup power, so final inverter selection should be checked against equipment specifications.
Is this calculator suitable for Pakistan and India?
Yes. Appliance-load calculations are not country-specific. Solar-resource assumptions remain editable so they can be adjusted for the project location.