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What Is Net Metering and How Does It Work?
If you're interested in setting up solar panels at your home, you've likely run into a number of new concepts when it comes to how utilities handle the electricity you'll generate. Perhaps you've run into the term "net metering" otherwise known as "net energy metering" or NEM, a concept unique to commercial and residential areas that generate their own electricity.
With solar panels, you can generate enough energy to provide electricity to your home and, sometimes, more than you can use or store. When that happens, you can sell that excess electricity to the utility company to distribute elsewhere along the power grid. That process is known as net metering.
How does net metering work?
In states that offer net metering (check here to see if your state qualifies), you can sell your excess solar energy back to your utility company in exchange for credits that offset the cost of your energy usage. You may generate excess solar power when it is clear and sunny out, but see less energy than is necessary to power your home when it is cloudy or rainy. By selling your excess energy back to the utility grid, you'll be able to use the credit to cover the cost for any electricity you need to use. You end up paying only for the "net" energy, or the difference between how much you sold and actually used.
The types of net metering
There are three different models of net metering, and which one is available to you may depend on your state and your utility provider.
Net metering
Net metering is the most common arrangement, and works by selling any surplus power generated by your solar panels to the utility operator in exchange for credits, which offset any electricity you may need to use from the grid. The credit is applied at the retail rate, which means the rate that you pay for electricity. Only one meter is required to track this, though your meter may need to be upgraded when you go solar.
Buy all/sell all
The buy all/sell all model works by selling 100% of the energy that your solar panels generate to the utility company. It is sold at wholesale price, which is cheaper for the purchases. In exchange, you get 100% of your home's energy from the utility company, which you pay the retail rate to use. This requires two separate meters, and you will pay the difference -- if any -- between the amount generated and the amount consumed. It's important to note that under this model, you do not directly consume any of the energy your solar panels generate.
Net billing
Much like net metering, the net billing model allows you to use the electricity generated by your solar panels and sell the excess to the utility company at retail price. Unlike the net metering model, though, you cannot bank credits for future billing cycles. This arrangement is more common for commercial situations than residential ones.
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What to consider when it comes to net metering types
In some cases you won't have a choice when it comes to the type of net energy metering arrangement, as utility companies may only offer one option. However, if you can choose, you'll want to keep in mind a couple things.
Net metering is the most common option for a reason: it's the simplest to understand. You get credits for energy sold and those credits are at retail price, meaning they are paid at the same rate that you pay for your electricity. That makes the math simple.
However, that doesn't mean it's the best deal available to you. If you're in a situation where you expect to generate a lot of electricity -- a region where it is sunny most of the time and there isn't much rain or cloud cover to interfere with your panels -- a buy all/sell all option may work better. While you'll be selling at a wholesale rate, meaning it is a lower rate for you since you are acting as a provider, you'll also be selling much more than you otherwise would. All of your solar power generation will be monetized, as opposed to just the excess.
You should also keep in mind other fees associated with net metering. For instance, you may have to pay a connection fee. This is a monthly expense that you pay for connecting to the utility company's grid. It typically isn't much, between $10-20 per month, but it is an expense to keep in mind.
No matter what arrangement ends up working best for you, net energy metering a great way to get the most out of your solar panels. Not only does it allow you to power your own house or pay for your full electricity use, but it also allows you to monetize your energy generation and let others make use of it.
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