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How to Determine the Size of Your Solar Panel System

How big should your solar panel system be? Figuring out what size PV array to install isn’t easy.

You want your PV system to produce enough energy to meet your household needs and offset your monthly electricity bills. On the other hand, you’re concerned about costs – and though prices for solar panels have dramatically dropped in recent years, you don’t want to pay for more than you need.

As you make plans to install a new solar panel system, you’ll need to consider the following to determine the right size for your PV array.

1. Examine Your Electricity Bills

Pull out your electricity bills from the past year or take a look at them online. The amount you’re paying now helps to establish the basis of your energy production goal. After all, if your monthly costs average S$100, for example, you don’t need to install a PV array that produces S$200 worth of power.

2. Look At Your Household Energy Use

While you’re checking out your electricity bills, find your energy usage, which is listed in kilowatt-hours (kWh). This is a separate consideration because life circumstances – such as having kids, building a home addition or investing in energy-efficiency upgrades — could cause this figure to increase or decrease. Factoring in your future energy needs is crucial to correctly sizing your PV system.

3. Account For The Weather Conditions

How much direct sunlight does your part of house receive per day? Do you have a lot of cloudy days? Weather plays a large role in determining PV system size, as the conditions affect energy production.

4. Evaluate Your Available Rooftop Space

For maximum sun exposure, a PV system in Singapore should face east. Rooftops that face west can work, but more solar panels may be necessary. Along with angle, you also need to consider the amount of space you have available and whether shade from obstructions like trees, skylights, chimneys or vents may interfere with energy production.

If you live in Singapore, schedule a site evaluation and solar panel system installation estimate with the professional team at Solar Era.

A trusted Singapore PV industry leader for over a decade, Solar Era has extensive experience designing efficient, cost-effective PV arrays that offer optimal energy production. Contact us for a free, no-obligation consultation to discuss solar panel system installation today.

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