To find the right solar system for your house, one needs to know the daily average consumption of energy of the house. The bill will denote electricity consumption in kWh. Each kW of solar you install will produce around 4 – 4.5 kWh per day. To ascertain the size of the system you need, just divide your daily consumption by this amount.
If the daily average consumption is 28.6 kWh, then the size of the system can be calculated as : 28.6 kWh (daily average)/4.5 kWh = 6.3 (6 kW system)
We can find out the total number of panels required by the house by dividing the total kW required by the output of each panel. An average solar panel has an output range of 250 W – 265 W.
In that case the calculation would be: 6 kW / 250 W x 1000 = 24. For a 6kW system, one will have to install 24 solar panels.
Variables that determine the size of the solar system are:
• home’s energy usage
• your roof’s available square footage
• solar panel wattage
• amount of sun the solar panels will receive
Based on your energy needs, Sustain Solar custom designs a solar system for you using proprietary solar design software platform, which enables us to design a system and solar plan specifically for your home.
Your savings expectations as well as other factors such as location and installation conditions have a direct impact on the number of panels one should install on your home. Locations with more ‘daylight hours’ like Perth will require less panels to achieve the same result than areas that receive less daylight hours, such as Hobart.
Most residential solar panels have power output ratings from 250 to 400 watts, the difference is it would have either 20 250-Watt panels or 16 300-Watt panels. A solar panel’s wattage represents its potential power production under ideal conditions. The systems would generate an equal amount of power if installed in the same location.
Electricity generated by solar panel system depends on factors like:
• panel efficiency
• temperature sensitivity
• shading
• angle of your roof.
If there is an average 5 hours of direct sunlight, the panels will produce roughly 1.5kW per day. The calculation being: 5 hours of sunlight x 290 watts from a solar panel = 1,450 watts or roughly 1.5 kilowatt hours per day. Solar panels’ total wattage plays a significant part in your system’s overall cost.
Owners are left with 2 options:

  1. They can go for high efficiency solar panels which would cost more than their less efficient counterparts. It is viable if the upfront cost difference is justified by the value of generating more electricity over the lifecycle of your solar system. High efficiency panels generate more wattage which means fewer panels on your roof.
  2. They can install a smaller system and still draw some electricity from the grid. This decision will in part be affected by whether you add solar battery storage.
    Solar panels with battery storage have an added advantage. It maximizes your electricity offset from the grid and ensures that you buy a minimum amount of energy from the electric company when prices are highest, thus giving a greater control of powering your energy needs. Excess electricity produced by the panels are stored in the battery. It can be used during power failures, at nights or when we need extra power.
    Sustain Solar provides customized solar plus battery storage solutions that enables you to generate, store, and manage affordable solar energy on your terms. It generates electricity and provide a backup power solution.
    Rooftop solar and home batteries build a safer, modern and resilient power grid. Clean, sustainable solutions just make life better.
    Sustain Solarwill ensure that you have the best number and style of solar panels to optimize your rooftop’s solar power production. You can rest easy with a customized solar solution from Sustain Solar. Our systems are designed for your house structure, lifestyle, energy and financial goals.
    We have the resources and experience to maximize your solar systems’ performance. We’ll guide you every step of the way from contract through installation and maintenance. And, we’ll be there to support and guide you for many years to come.
    We provide only tier 1 solar panels from manufacturers that have Australian support for customers. Sustain Solar’s solar panels and battery can help lead Australia to a cleaner and brighter future. We’ve been building toward this energy revolution for more than 16 years. We empower you to take control of your energy costs and regain freedom from your electric bill and assure a reliable energy future for your home with solar.

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