Is It Time To Replace Or Upgrade Your Solar System?


So, you jumped on the solar system band-wagon early and now you’re wondering if it might be time to upgrade or even replace your system. Whilst solar system prices have dramatically decreased over the years, you shouldn’t go upgrading or replacing your system without understanding and knowing whether your current system is performing how it should.

How to check if your solar system is performing how it should

Solar Panels Blue SkyA typical solar system will perform at its best on a sunny 25-degree day. Lucky enough in Australia these aren’t too rare! On a day like this check how much power is being generated by your solar system. Don’t expect to see a 6kW system to be generating 6000 watts of power. Through the setup, wear and tear and many other factors, an expected production in good conditions should be around 60%-80% of the systems rated output. It’s also important to note that to keep your solar system functioning to its best abilities the Clean Energy Council recommends a routine inspection from your installer every 5 years.

After conducting the above test, you should be left with one of the below scenarios.

Scenario 1

Underperforming system

If this is the case, it’s time to contact your original installer. If your system is still under warranty and the issues with the system are legitimately under the warranty, then you should not need to pay for a replacement. You may, however, decide after your system has been fixed that you still want to upgrade, which will then put you in the two below scenarios.

Scenario 2

The solar system is performing well but you want to increase its size

Best Solar Installers AustraliaIf your current system’s inverter has the capacity to add more panels and your roof has the space to cater for additional panels, this will be your best option to increase your generated energy. This will cost less than if you were to upgrade your inverter or install an additional solar system.

If your current inverter is at its capacity and cannot add additional panels your two options as mentioned above are to:

  • Upgrade the inverter and add more panels
  • Install an additional solar power system

Warning: increasing the capacity of your system could affect the terms and conditions within the contract you’ve signed with your Energy Retailer. This may impact your current Feed-in Tariff rate, so make sure to contact your Energy Retailer when deciding to increase the size of your system or add an additional system.

Scenario 3

The solar system is performing well, you have excess energy and want to add battery storage

Solar Power DiagramAdding a battery to your system will allow you to store any excess energy generated from your system, for you to use when your system is not generating energy (when the suns not out). For a battery to be useful and store excess power your current solar system must be generating more energy than you are consuming daily.

While this provides more energy independence from the grid a battery won’t benefit everyone’s current financial situation like a solar system will. Today’s current prices (if your State does not offer subsidies or incentives for battery) could have you looking at an expected return on investment in 15 years. As technology advances and batteries become more accessible it is expected prices will drop, similar to how they have for solar systems.

Ready to upgrade or want to receive quotes to compare prices and options?



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Understanding Batteries

Off-Grid Systems

For some households a battery system can be of great benefit and minimise a home’s reliance on the grid. However, it’s important to understand for a battery to be useful your solar system needs to be generating excess energy for the battery to store, which you can then use at night or when the sun is not out.

When selecting a battery, you’ll want to invest in a system that is most suited to your home and can drive the best return on investment (ROI). Despite a larger upfront cost, a higher quality battery may significantly increase your ROI.

    Battery systems start from $6,000 and costs can vary greatly based on the following factors:

  1. Cycle Life-Time

    The number of times a battery can fully charge and discharge.

  2. Battery Power (kW)

    How fast it can be charged or discharged.

  3. Storage Capacity (kWh)

    The maximum amount of energy a battery system can store.

  4. Battery Management System (BMS)

    An electronic ‘smart’ system that gathers data and manages the battery ensuring it does not overload or operate outside of its safe functioning zone..

  5. Inverter

    Battery systems require their own inverter if your solar system does not have a hybrid inverter.

  6. 'All-In-One Unit’

    A system which includes the battery, BMS and an inverter all in one unit.

  7. Warranty

    Length of time or cycles the battery system is under guarantee.

  8. Blackout Protection/Backup

    It’s important to note this is not a common feature of a battery system and could cost thousands of dollars to include. Blackout protection not only requires additional components but also a specialised installation and rewiring. For grid-connected homes, the cost for blackout protection can outweigh the benefit.

Additionally, if your purpose for adding battery is to go Off-Grid and become completely independent from the grid you will need to ensure your solar system can generate enough energy to power your home and your battery system is large enough to store this energy. For homes in metro areas going Off-grid is not cost effective and is only recommended for those in remote areas with limited access to the grid. Off-grid solar systems with battery start at approximately $30,000.

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