So, you made the jump to solar a while ago, and you’re looking at your system and deciding whether itis time to replace your solar system for something newer. How do you know when it is time to replace your solar panels and inverter? Shouldyou replace your system or upgrade it?
Over the 10+ years your solar panels may have been on your roof, they havebeen there in rain, hail, or shine and continued to produceenergy over time. Here are a few ways to know if it’s time to replace or upgrade your solar system.
Solar Panel Efficiency Degradation
Solar panels typically have warranties from 20-25 years, but over time theylose their efficiencywhich reduces your return-on-investment as time continues.
Each year that passes, a solar panel can lose around 0.5-1% efficiency (depending on the age), and older panels can lose the majority oftheir output capability. (Good-quality, modern solar panels can retain up to 90% of their efficiency over the course of their lifetimewith approximately 0.5% reductions each year).
Check your Solar Analytics
Depending on when your solar system was installed, you may have access to some sort of solar analytics to see insightful analytics ofyoursystems’ overall performance. This would be a good way to visualise the production trends your solar system is heading in, whetherit is a stable decline, or a dramatic one.
You can keep an eye on your energy performance and if you'reunsatisfied with the system’s output, it can be an indication toupgrade your system, or replace itentirely.
How to know when it'sTime to Upgrade your solar panels?
If you have had your system for years on end, there will be a chance that your solar panels have been damaged in some way. The lastgeneration of solarpanels are more prone to damage as they lack the modern protection technology that new panels have.
Newer and some older solar panels are designed to withstand decades of abuse but suffer invarious types of weather, and other variouselements such as wind, humidity, UV, or thermal stress.
Thermal Stress
Thermal cycling amongst others is a common form of deterioration, especially in Australia’s summer exposing the panels to harshsunlight. The heat forces the panels’ metal components to expand and contract as everyday goes past, and over a decade it can really addup.
High-Wind
With high wind, the dynamic mechanical load capacity can force the panels to warp and bulge in the middle.
Trina conducted a test of their 530 W and670 W panels here.
UV Radiation
UV Radiation can cause damage to the passivation layers over time, with maximumdegradation rates of 0.12% - 0.73% per year.
Humidity
Humidity is closely joined to thermal cycling where older panels expand, allowing moisture to get inside the panels where it can causemetal corrosion, delamination, and increased overall degradation.
Okay so we’ve identified if your system needs upgrading, but what do you do now? How do we fix it?
Do you Add to your Solar System Instead?
You’ve had a look at your solar system analytics, and from what you can see there isn’t a huge decrease in system performance, but you’rewanting to recoup the reduced performance and get it back to where it used to be.
You can considerextending your existing solar system by adding more panels. It’s a simple strategy, but it would allow you to generateclose to your existing system’s original output and wouldn’t cost you as much to replace the entire system.
However, there might be some system compatibility issues in combining modern with older technology. We visit quite a lot of propertieswith older systems where some panel and inverter brands have been liquidated and no longer exist. Investing in newer, more reputablecompanies will ensure proper honoured warranty and long-lasting quality.
Your Panels May Just Need a Clean
If your panels aren’t that old but you see a significant decline in performance, this could possibly be because your system hasn’t beencleaned. We recommend cleaning your solar panelsonce every 6-months to ensure your system is as productive as possible. We made a full guide on how to clean your solar panels here.
If you’re still unsure on what your next step should be, don’t over-think it! We provide solar healthcheckups and free consultation on how you can get the most of your system and property.
Expand Solar Systemvs.Battery Energy Storage
The good news is that you definitely have options. We genuinely would like to help in finding the best solution for you, your budget, andyour property. If you’d like to have a chat, we provide completely free consultation on finding the optimal energy solutions.
Below are some options simplified into 4 categories. We created an article around this that you can readhere.
Full Replacement
You could also completely replace your entire solar system by replacing your solar panels,mounting, and inverter for a top-of-the-line system that will last another 25-30 years.
Upgrade
The cheapest way to upgrade your system would be to add more solar panels. Dependingon your systems’ size, you could add a few more panels to increase your overall production.
Add a Battery
Add a solar battery to store excess solar power throughout the day. Whether your solarsystem is at its original installation capacity or an older system, depending on your consumption you may still be producing more thanyou’re using.
Join Amber
In addition to adding a battery, you can not just save money with your battery, but earn it.We recommend looking at Amber and how they can make your battery into a money-making-machine.
Get an Experts' Opinion on Solar & Battery Investments
If you've read all of this and are still unsure on if your solar panels need replacing, send us a message, and we can walk you through on ifit is time and how to proceed. We won't try to sell you something you don't need. Let's chat.
Every property will have its own features and history and depending on when the solar panels were installed,it is important to check the panelsa couple of times a year to ensure your system is running to maximum capacity.
If you feel your solar system isn't old enough to replace but needs a professional totake a look, we provide solar health checks which involves a member of our team coming out to analyse your solar system and ensure it isrunning correctly.
Frequently Asked Questions
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