July 22, 2025

Investing in a solar system is a huge step toward energy independence and long-term savings. But to truly maximise your investment, it’s worth understanding how to keep your system performing at its best, not just in year one, but over the full 20 to 30 years that it’s designed to last.

In this article, we will discuss how solar PV works and explore effective, practical ways to get the most out of your solar system.

1. Understand How Solar Panels Work

Solar panels absorb daylight to generate direct current (DC) electricity. That electricity then flows through an inverter which acts as the brain of the system, where it is converted into alternating current (AC) electricity which can power the appliances in your home.

If you have battery storage, electricity can be stored for later use, such as in the dark evenings or when daylight is low. This electricity can also be paired with a hot water diverter to power your immersion heater, charge an electric vehicle (EV), or exported back to the grid.

Understanding how your solar system works help you to make better use of it, especially when it comes to timing your electricity use.

2. Orientation and Positioning Matter

Your system’s design plays a key role in its performance. In Ireland, a south-facing roof with a tilt of around 30-35 degrees tends to produce the highest yield. However, that’s not the only viable option, east-west split arrays and flat roof systems also perform well with good planning and high quality equipment.

Minimising shade is also important. Trees, chimneys and neighbouring buildings can cast shadows, reducing the amount of daylight the panels are exposed to and in turn reducing their output.

Read this article to learn more about the importance of orientation and positioning.

3. Keep Panels Clean and Clear

Solar panels are designed to be low-maintenance, but dirt, dust, bird droppings or moss can gradually impact efficiency. In Ireland’s climate, rainfall usually takes care of most debris, but it’s still a good idea to visually inspect the panels once or twice a year.

If your panels look dirty or you notice a reduction in their performance, consider a gentle clean using water and a soft brush.

Read this article to learn more about the best practices for solar panel maintenance and cleaning.

4. Monitor Your System Regularly

Most modern solar systems come with an app or online portal that lets you track performance in real-time. Checking this regularly can help you to catch any problems early.

Keep an eye on daily production trends and seasonal variations. If output drops significantly without a clear reason, such as the weather or availability of daylight, it might be time to book a service with your installer.

5. Maintain Your System Over Time

Just like a car, a solar system runs best when it’s well-maintained.

Solar systems generally need little attention, but it’s worth having your system checked by a qualified installer every 3-5 years. They will inspect the connections, check for any wear and tear, and ensure that the inverter is still performing well.

Preventative maintenance is usually quick and affordable, compared to waiting for a full failure.

This is not just a performance check, it’s also a safety check.

6. Use Your Electricity Wisely

Solar PV generates electricity during daylight hours. Using your home appliances during those daylight hours can dramatically increase your self-consumption.

Where possible, you should run washing machines, dishwashers and other home appliances in the morning or afternoon, before the sun starts to set. Smart plugs, timers, or smart home energy management systems can automate this for you, helping you get the most out of your investment.

If you have battery storage, this adds even more flexibility by allowing you to store self-generated solar electricity for use at night and during periods of low daylight.

7. Consider Add-ons and Upgrades

Making the most of your self-generated electricity is the most effective way to make the most of your investment, lower your electricity bills and reduce your payback period. This is due to rising electricity costs from energy providers. As well as this, microgeneration export rates are typically lower than retail electricity rates, making battery storage a better option.

Even if you didn’t install a battery from day one, the addition can help you store more of your self-generated electricity.

Similarly, a hot water diverter can be used to power your immersion heater, allowing you to maximise your self-generated electricity usage, while also reducing your water heating costs.

If you drive an EV or are considering purchasing one in the future, a smart EV charger can ensure your car charges using your solar electricity.

These upgrades don’t suit every home, but for some, they make a huge difference in cutting energy bills and reducing reliance on the grid.

8. Improve your BER, add value to your home and access grants

Solar systems don’t just reduce your bills, they also improve your home’s Building Energy Rating (BER). If you’re planning to sell or rent your home in the future, BER matters.

Homes with solar panels installed can increase their value by up to 4%, in comparison to similar homes without them (source: Energy Efficiency).

It can also open up access to grants and incentives, such as those from the SEAI, especially for system upgrades or retrofits.

Even a simple solar diverter or battery retrofit might qualify for support, so it’s worth checking your options.

9. Consistent Habits, Better Returns

The good news is that you don’t need to micromanage your solar system. Just keeping an eye on it, cleaning when needed, and building a few smart energy usage habits can lead to long-term savings and better system performance.

10. Final Thoughts

Getting the most out of your solar panels isn’t complicated. It comes down to understanding how the system works, paying attention to performance, and making small adjustments in how and when you use electricity.

Whether you’ve just installed a system or have had one for years, these best practices can help you maximise your return, while reducing your carbon footprint and boosting your home’s efficiency.

Ready to Take the Next Step?

If you’re thinking about going solar, we can help make the process stress-free. Complete the form below to get a free home solar quote and consultation.