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Do Solar Panels Work During a Blackout?

Do solar panels work during a blackout?

Solar power has become one of the most attractive energy solutions for both homeowners and businesses, offering a clean energy source that benefits the environment while leading to significant financial savings. As people continue moving toward solar energy, a question continues to pop up: will my solar powers work during a blackout? The answer isn’t as straightforward as you might think.

In theory, if panels are generating power from sunlight, you shouldn’t need to be connected to the power grid for them to work. As long as the sun continues to shine, they should continue producing electricity. However, this is not the case: your solar panels will stop generating electricity if the power goes down. So why won’t solar panels work during a blackout?

Solar Panels and the Electric Grid

Despite generating power on their own, solar panels are still partially dependent on the electric grid. A standard grid-tied system is actually designed to shut off during a blackout for a variety of technical and safety reasons. Think of it this way: your solar panels will often produce excess energy over the course of the day. This excess power is then exported back to the grid in exchange for energy credits. This is called net energy metering, or NEM. In California, the current system is NEM 3.0. Learn more about maximizing your savings under this new system.

But what happens when the grid goes down during a blackout? If your panels continued to produce electricity and sent it back to the grid during an outage, it could create dangerous situations. Utility workers who are working to restore power would be at risk of electrocution if there was power running through the lines.

Can I Go Off-Grid to Avoid Outages?

Having your solar panels stop working due to a power outage can be frustrating, especially when it feels like one of the main benefits of going solar is grid independence. This may lead you to consider going off-grid as a workaround to avoid dealing with grid outages. Going off-grid would mean that you be completely removed from the utility grid and would therefore have to produce all your own electricity. In this case, your solar panels would continue producing power if the grid went down. However, going off-grid has its own challenges.

First, you would lose the benefits of a grid-tied system. In California, under NEM 3.0, solar users receive compensation for excess energy that is exported back to the grid. If you are completely removed from the grid, your excess energy would go to waste, and you’d be unable to earn anything for any surplus energy your panels produce.

Second, if you aren’t receiving any power from the grid, you would need to be generating your own power 24 hours a day, seven days a week. Solar panels are great for producing energy during the day, but once the sun goes down, and even on cloudier days, you’ll need another source of energy. This means you’d need a large system of batteries or generators to keep your home powered consistently, and this can become expensive, as you’ll need enough to over all your power needs without any backup from the grid.

As a result, going off-grid may provide you with energy independence and the ability to avoid your solar panels being switched off during a blackout, but it may not be worth it given the added costs, effort, and maintenance it would take to keep your home powered without having the grid to fall back on.

Investing in Batteries for Backup Power

The other more practical option to navigating blackouts with a solar system is investing in backup power in the form of a battery. Batteries allow you to store the excess energy your solar panels generate during the day, allowing you to use it when you need it, including at night and during a blackout.

This cost-effective and commonsense solution has become the standard in the solar industry. Installing batteries is less expensive than an off-grid system as you won’t need as many to keep your home powered. Since you’re still connected to the grid, you can rely on your utility company to power your home when your solar panels aren’t producing enough electricity, and still have extra backup power stored in your batteries for a blackout. Having batteries will also be sufficient for powering your main home appliances, such as your refrigerator and medical equipment, in most cases for when the power goes out.

For these reasons, batteries have become a go-to solution for homeowners who want to bolster their solar systems. Popular products, like the Tesla Powerwall, Enphase IQ Battery, and the Panasonic EverVolt, offer scalable battery solutions that can be customized to your specific energy needs. In most cases, batteries offer the perfect balance between energy independence and cost-effectiveness. They may not make you fully grid-independent, but they also won’t break the bank. You’ll get the peace of mind that comes with having backup power while still benefiting from grid-tied incentives like NEM 3.0.

Tesla Powerwall

Load Controllers: An Alternative Backup System

Another option that provides backup for solar panels during a blackout is what is known as load controllers, or special inverters that allow for limited solar panel operation during an outage, even if the system does not have a battery. This option is less expensive than a battery, and prioritizes essential circuits and can power critical appliances such as lights and refrigerators, using power generated from your panels. However, this setup is still very limited and is less reliable than a battery system.

Our Recommendation: Get a Battery

So, to summarize: unless you decide to forgo the benefits of being grid-tied and set up your solar system off-grid, your best bet is to install a battery with your solar panels. Solar panels are designed to shut off during a blackout for safety reasons, so installing a battery as backup power is the best way for you to mitigate the effects of an outage. Solar Discovery is an all-in-one solar, battery, and roofing company that offers a wide range of brands, products, and overall solutions to meet your energy needs. Get in touch with us today to learn more about how we can get your home equipped for a blackout and provide you with a cost-effective, energy-efficient solution for your home.

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