3kW Solar Panel: How Many Units Can It Generate Per Day?

3kW Solar Panel - Unit Generation
May 09, 2025

Since the launch of the PM Surya Ghar Muft Bijli Yojana, many Indians have adopted rooftop solar solutions to reduce their electricity bills. A small family home with moderate electricity usage (including one air conditioner) typically requires a 3kW solar panel system to bring their energy bills close to zero. High-quality solar panels, such as those from APS, are environmentally friendly and cost-effective, allowing you to recoup your investment in about three years. Additionally, government solar subsidies have made the transition to solar energy more affordable and accessible for residents.

Understanding the Technicalities of a 3kW Solar Panel System

A 3kW solar panel system usually consists of 8 to 10 solar panels mounted securely on the roof. These panels are aligned with the solar inverter and smart meter that your electricity provider has recommended. To install a 3kW solar panel system, you will need approximately 250 to 300 square feet of rooftop space.

The performance of the solar panels can vary based on several factors, including the type of panel selected, the angle and direction at which they are installed, and the conversion capacity of the inverter.

How Many Units Can a 3kW Solar Panel System Generate?

Despite the technical factors mentioned above, a 3kW solar system can generate a substantial amount of energy daily. Typically, a 3kW solar panel system can produce approximately 12 to 13 units of electricity per day. If the solar system receives direct sunlight for 8 to 9 hours each day, it may generate between 14 to 15 units in the summer. This translates to around 400 units per month, effectively reducing your electricity bill to nearly zero. Additionally, bifacial solar systems can generate more energy as both sides of the solar cells can absorb sunlight.

How to Calculate Your Energy Consumption

  1. Check your electricity bill.
  2. Look for the “Total Units Consumed” in the meter details section.
  3. Divide this number by 60, as bills are usually issued bi-monthly.
  4. The result will show your daily energy usage in units.

For reference, 1 kW of APS solar panels generates an average of 4.5 units per day. If your household consumes 10.2 units per day, a 3.25 kW solar system could meet your energy needs.

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