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choose correct size of solar power system for home

How can I choose the correct size solar power system for my home?


How to determine the right size solar power system?

Interested in finding the right size solar power system for your home? Understanding how to determine the optimal size is crucial. This decision will not only meet your energy requirements but also decrease your electricity bill. Here in this blog, we will explain it to you in a simple and accessible way.

Evaluate your energy consumption

The first step is to evaluate your energy consumption. Collect electricity bills for the last 12 months and calculate their average monthly energy consumption (kWh).

Calculation of average monthly energy consumption:

Collect Electricity Bills: Collect your electricity bills of the last 12 months.

Add total annual consumption: Add the total energy consumption (kWh) of all months.

Find the monthly average consumption: divide the total annual consumption by 12.

Example:

If your annual consumption is 12,000 kWh, then the average monthly consumption would be:

Average Monthly Consumption= 12000 kWH/12= 1000 kWH

Evaluate your roof space and sunlight

Next, depict the views of your rooftop space and sunlight. Selecting the appropriate size solar power system allows you to pinpoint the available roof area and the amount of sunlight your home will receive.

Roof space:

Measuring available space: Measure the available roof space to install solar panels. Do not include any obstructions such as chimneys or vents.

Importance of direction and angle: It’s essential to observe the direction your roof faces and its angle. Roofs oriented towards the south in the Northern Hemisphere, at angles between 30 to 45 degrees, typically yield optimal performance.

Sunlight:

Hours of Sunlight: Check how many hours of sunlight your area gets on average. This information can be obtained from online solar calculators or local solar installation experts.

Evaluating Shadows: Take note of the shadows cast by any trees, buildings or other structures on the roof. Shadow can reduce the efficiency of a solar panel by a large amount.

Calculate System Size

Now, use this information to calculate the right size solar power system. Use the simple formula:

System Size (kW)=Sunlight Hours per Day×30×System Efficiency/Average Monthly Energy Consumption (kWh)

Example:

  • Average Monthly Energy Consumption: 1,000 kWh
  • Sunlight Hours per Day: 5 hours
  • System Efficiency: 80% (0.8)

System Size (kW) = 1000kWh/5*30*0.8 = 1000/120 = 8.33 kW

In this example, you would need a solar power system of 8.33 kW.

Consider future energy needs

When you’re determining the size of your solar power system, also take future energy needs into account. Such as:

New Equipment or Vehicles: Are you planning to purchase an electric vehicle or add new equipment in the future?

Family Expansion: Can the number of members in your family increase?

Home Extension: Are you planning to expand your home?

Choose a slightly larger system size to account for these potential changes.

Get advice from solar professionals

Finally, consult solar professionals to get an accurate assessment and system size. They can:

  • perform a detailed site assessment
  • assess the shade of the roof,
  • recommend the best panels and system
  • assist with permits and installation.

Conclusion

Selecting the right size solar power system for your home involves careful consideration of your energy efficiency, solar capacity, system and future definition. By following the steps mentioned in this blog and getting guidance from Solar Experts, you can make an informed decision that will benefit both your finances and the environment. Adopt solar energy to power your home energy-free and sustainably for years to come!

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