Solar power and air conditioning can work particularly well together in NSW homes, especially when air conditioning is used during daylight hours when rooftop solar is generating electricity.
Rather than your air conditioner being directly “powered by solar”, the electricity generated by your solar system contributes to your home’s overall electricity needs. When solar generation is high enough, this can reduce the amount of electricity your home needs to draw from the grid while the air conditioner is running.
How much of your air conditioning use can be covered by solar depends on factors such as the size of your solar system, the efficiency of your air conditioner, other household electricity use and the time of day.
This guide explains how solar and air conditioning work together, what affects the potential savings, and how Hunter Valley homeowners can make better use of their solar generation when heating and cooling their homes.
Why Solar and Air Conditioning Work Well Together
Air conditioning can be one of the larger electricity loads in a home, particularly during hot weather. Rooftop solar can help offset some of this electricity use when your system is running while your panels are generating power.
The key is timing.
During daylight hours, electricity generated by your solar panels is available to meet your home’s electricity demand. If you run your air conditioner at the same time, some or potentially all of its electricity use may be supplied by your solar generation, depending on how much power is being produced and what else is using electricity in the home.
This can:
Increase the amount of solar electricity you use within the home.
Reduce the amount of electricity you need to purchase from the grid during those peaks.
Make daytime heating or cooling a practical way to take advantage of available solar generation.
For Hunter Valley households, where air conditioning demand can be high during summer, coordinating air conditioning use with periods of strong solar generation can help make better use of a rooftop solar system.
How It Works: Solar Meets Air Con
Solar panels and your air conditioner don’t operate as separate systems. The solar system generates electricity for your home, while your air conditioner draws from the electricity available at the time. Here’s a simple overview of how the process works.
Step 1: Solar Panel Production
Solar panels on your roof capture sunlight and convert it into DC (direct current) electricity.
Step 2: Inverter Conversion
That electricity is sent through an inverter, which converts DC to AC (alternating current) – the type of power your home (and air conditioner) uses.
Step 3: Powering Your System
The electricity generated by your solar system contributes to the electricity being used throughout your home, including by your air conditioner. If your home is using more electricity than the solar system is producing, the additional power is drawn from the grid. If your solar system is producing more than your home is using, the excess may be exported to the grid or stored in a battery, if you have one.
This is why running your air conditioner while your solar panels are generating strongly can help increase your use of self-generated electricity.
What Affects Your Potential Savings?
The amount you may save by using air conditioning alongside solar varies from home to home. The greatest benefit generally comes from using more of your own solar generation while it is available, reducing the amount of electricity you need to purchase from the grid.
Factors that can influence the potential benefit include:
The size and output of your solar system.
The energy efficiency and power requirements of your air conditioner.
How much electricity the rest of your household is using at the same time.
When you run your air conditioner.
Your electricity tarrif and solar feed-in tarrif.
Whether your home has battery storage.
A household with strong daytime solar generation and an efficient air conditioner may be able to cover a significant portion of its daytime cooling demand with self-generated electricity. However, the result will vary depending on the home and how both systems are used.
Environmental Benefits
Using more of your own solar-generated electricity can reduce the amount of electricity your home needs to draw from the grid while your air conditioner is running. This can help reduce the environmental impact associated with household heating and cooling.
Combining rooftop solar with an energy-efficient air conditioner can be one part of a broader approach to reducing household energy consumption, alongside good insulation, sensible temperature settings and regular system maintenance.
For more ways to reduce the energy used for home cooling, see our eco-friendly cooling tips for Hunter Valley homes.
Choosing an Energy-Efficient Air Conditioner for a Solar Home
You don’t need a special type of air conditioner to make use of solar-generated electricity. However, choosing an energy-efficient system that is correctly sized for your home can help reduce the amount of electricity required for heating and cooling.
Inverter Technology
Inverter air conditioners can adjust their output as heating or cooling demand changes, rather than simply operating at full capacity whenever they are running. This can help provide more efficient and consistent temperature control.
Energy Efficiency
Compare the energy ratings of suitable air conditioners when choosing a new system. A more energy-efficient model will generally require less electricity to provide the same level of heating or cooling, helping you make better use of the solar electricity available during the day.
If you’re comparing different models, our guide to air conditioner energy ratings explains how to interpret efficiency labels and make a more informed comparison.
Correct System Sizing
Bigger isn’t necessarily better when it comes to air conditioning. The system should be sized according to factors such as the area being conditioned, insulation, ceiling height, windows and the layout of your home. Correct sizing helps avoid unnecessary energy use while maintaining comfortable temperatures.
An appropriately sized, energy-efficient air conditioner can make it easier to maximise the benefit of the solar electricity your home generates during the day.
Smart Controls Can Help You Use Solar More Effectively
Smart controls, timers and scheduling features can help you align more of your air conditioning use with the times your solar system is generating electricity.
Schedule heating or cooling during daylight hours when solar generation is available.
Use timers or schedules to avoid unnecessary running.
Control individual zones where your system supports zoning.
Adjust compatible systems remotely using Wi-Fi or app-based controls.
The features available vary between air conditioning systems and controllers, but using automated controls effectively can help reduce unnecessary energy use and increase the opportunity to use your own solar-generated electricity.
Our Local Approach for Hunter Valley Homes
Homes across the Hunter Valley vary considerably in age, construction and energy efficiency. A renovated weatherboard home in Maitland may have very different heating and cooling requirements from a newer home in Lochinvar or a rural property around Greta or Branxton.
When selecting an air conditioner, factors such as insulation, room size, ceiling height, window orientation and the way different areas of the home are used all affect the system size and type required.
For homes with rooftop solar, these same considerations remain important. Choosing an appropriately sized, energy-efficient air conditioner helps minimise electricity demand, making it easier to take advantage of the solar electricity available during daylight hours.
Make Your Home Work Smarter, Not Harder
Solar and air conditioning can work particularly well together when heating or cooling is used during periods of daytime solar generation. While the potential savings vary from home to home, good timing, efficient equipment and sensible system operation can help you make greater use of the electricity your solar system generates.
Choosing an appropriately sized, energy-efficient air conditioner is an important part of the equation. A system suited to your home can reduce unnecessary electricity demand while providing reliable heating and cooling throughout the year.
If you’re considering a new air conditioning system for your Hunter Valley home, contact Carrick Air Conditioning for advice on choosing an efficient system suited to your property.