Conventional PV systems
In past years, solar power systems were mostly of the off-grid variety, with a battery for backup at night or when the sun didn’t shine. But now, the trend is toward grid-connected systems. With this, the electrical grid serves as a battery, and you pull power off the grid when you need more power than your solar system can generate, such as at night, and you send power to it when you generate an access. You can also have batteries as backup in case of an outage. This leads to the concept of net metering, which serves as an incentive to install a system that matches the power you use, a so-called net-zero system.
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