Let’s find out the accurate solar system size your property requires. For this you’ll be needing your electricity bill along with you. Let’s begin.
The Solar System Size depends on the:
- Electricity Usage & Future Needs
- Available Sunny Roof At Your Property
- The frequency of sunlight in your region
- Your budget, for sure.
(Note: If you prefer not to calculate this yourself, you can easily contact a trusted solar expert from Arise Solar by clicking here.)
Understanding Solar System Size
The solar system size refers to the total production capacity of the panels and is usually measured in kilowatts (kW). A panel’s generation capacity, on the other hand, is measured in watts (W).
- 1 kW = 1,000 Watts
Keep in mind that a single solar panel generally generates around 350 watts. Now, let’s calculate the solar system size specifically for your property.
Step 1: Electricity Usage
Step 1: Understanding Your Electricity Usage
To determine the right solar system size for your property, start by understanding your daily energy needs. Your electricity bill is a helpful tool for this. Here’s how you can calculate it step-by-step:
1️⃣ Find Your Total Energy Bill Amount
Look for the “Total Energy Bill” section on your electricity bill.
2️⃣ Calculate Your Daily Spending
Divide the total bill amount by the number of days in the billing period (usually 90 days).
Example:
- Total energy bill: $600
- Billing period: 90 days
- Daily spending: $600 ÷ 90 = $6.67 per day
3️⃣ Determine Your Daily Energy Requirement
To calculate how much energy you use daily, divide your daily spending by the average grid energy cost per unit (around $0.30 per kWh).
Example:
- $6.67 ÷ $0.30 = 22 kWh per day
4️⃣ Calculate Your Solar System Size
Now, divide your daily energy requirement by the average number of sunlight hours your property receives in a day (typically 4 hours).
Example:
- 22 kWh ÷ 4 hours = 5.5 kW system size
Since most systems come in standard sizes, you would need around a 6.6 kW solar system to cover your daily energy needs efficiently.
Inverter Size
A 6.6 kW solar system is typically paired with a 5 kW inverter. However, the exact inverter size may vary based on the brand and model. It’s best to consult an expert before making a decision.
Step 2: Available Roof Area
Most Australian homes receive 4-6 hours of sunlight daily. If your roof has enough space to accommodate the required number of panels, you’re ready to proceed.
If space is limited, you may need to:
- Reduce the number of panels.
- Consult with an Arise Solar expert for alternative solutions.
Step 3: Consider Your Budget and Future Requirements
Trusted solar retailers like Arise Solar offer up to 30 years* of panel performance warranties, ensuring consistent performance.
If you anticipate increased electricity consumption in the future or plan to add more appliances, opt for a larger system than currently required.
Tip: Share your future plans with a Clean Energy Council (CEC)–)-approved solar retailer like Arise Solar to get an accurate quote tailored to your needs.
Read More: Calculate the Cost of Installing a Solar Panel System and the ROI
