Does Solar Power Work During a Power Outage?

Solar panels are a great way to harness renewable energy, but many homeowners wonder: what happens during a power outage? If you’re considering solar panels for your home, this is likely a question that has come to mind.

Here’s a detailed look at how solar power systems perform when the grid goes down and how a solar panel battery system can change the game.

What Happens to Solar Panels During a Power Outage?

When the electrical grid experiences a power cut, solar panels shut down automatically. This safety measure prevents the electrical energy generated by the panels from feeding back into the grid and potentially causing harm to workers who are restoring power. 

Without a connection to the grid, the inverter, which converts the direct current (DC) electricity from the panels into alternating current (AC) electricity for home use, also shuts off, stopping the flow of electricity from the solar panels.

However, in some cases, solar panels might continue to generate a small amount of electricity if they are paired with a battery storage system. This setup allows the system to store excess energy produced during the day, which can be used during a power cut to keep essential appliances running.

Do Solar Panels Work in a Power Cut in the UK?

In the UK, solar panels alone do not function during a power cut unless they are equipped with a battery storage system, or be designed with backup capabilities (such as a Tesla Powerwall) or fitted with an extra device. This is because the system needs to be smart enough to feed power to the house while preventing any risk of discharging electricity back to the grid, which ensures safe and efficient operation without endangering grid repair work.

Why You Should Have a Battery Storage System:

A battery storage system can store surplus energy generated by your solar panels during sunny periods. When the grid is down, this stored energy can be used to power essential appliances like refrigerators, lights, and heating systems. This setup not only helps maintain power during outages but also reduces reliance on the grid and maximises the energy your solar panels generate.

5 Benefits of Solar Panel Battery Systems 

A battery storage system is an essential addition to your solar power setup, offering numerous benefits that enhance the efficiency and reliability of your renewable energy solution. Here's a detailed look at why incorporating battery storage can make a significant difference for your home.

1. Reduced Grid Dependence:

Battery storage allows you to use more of the energy generated by your solar panels, reducing your reliance on the electrical grid. This not only provides a level of energy security but also helps mitigate the impact of rising energy prices and potential supply issues.

2. Power During Outages:

With a battery system, you can keep critical devices and appliances running during a power cut. This means that even during extended outages, your refrigerator can keep food from spoiling, your lights can stay on, and you can power essential devices such as phones and laptops. In winter months, it can also ensure that your heating system continues to operate, maintaining a comfortable living environment.

3. Lower Energy Bills:

By storing excess energy, you can use it when the sun isn’t shining, effectively lowering your energy bills. Instead of buying expensive electricity from the grid during peak times, you can rely on the energy stored in your batteries. Over time, this can lead to substantial savings and a quicker return on your investment in solar technology.

4. Increased Energy Independence:

Battery storage provides greater control over your energy use, contributing to a more self-sufficient and sustainable home. With the ability to store and use your own generated energy, you become less vulnerable to fluctuations in energy prices and supply disruptions. This independence not only benefits your wallet but also aligns with broader environmental goals by reducing your carbon footprint and reliance on non-renewable energy sources.

5. Maximised Energy Utilisation:

Without a battery storage system, excess energy generated by your solar panels during the day is sent back to the grid. While this can provide some financial return through feed-in tariffs, it doesn't fully capitalise on the energy your system produces. By storing this surplus energy, you can use it when your panels are not generating electricity, such as during the night or on cloudy days. This maximises the use of your renewable energy and enhances the overall efficiency of your solar power system.

Can Solar Panels Work Independently of the Electrical Grid in the UK?

In theory, solar panels combined with a battery storage system can work independently of the electrical grid. However, due to the high costs associated with battery installation, it’s not as common in the UK as it is in some other countries. Despite the initial investment, the benefits of energy independence and reliability during power cuts can make battery storage a worthwhile consideration.

Choose Solar Panels for Power Outages

If you’re considering installing solar panels and want to ensure you’re prepared for power outages, exploring a battery storage system might be the right move for you. 

Use our solar panel calculator to estimate your needs and potential savings. For personalised advice and to discuss the best options for your home, contact us today. Our team at Make My House Green is here to help you achieve a more reliable and sustainable energy solution.