An uninterruptible power supply (UPS) is a device that allows a computer to keep running for at least a short time when the primary power source is lost. UPS devices also provide protection from power surges. An uninterruptible power supply (UPS) is a device that allows appliances to keep running for at least a short time when the primary power source is lost. UPS devices also provide protection from power surges.

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When using solar inverts and a battery bank as a UPS, you get additional protection from any surges with a more stable supply of power. Additionally, you can get a longer supply of power depending on your battery bank's size. 

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Thes "UPS" solutions are a great way to start investing in solar energy as all of these solutions provide the user with the option of adding solar panels at a later stage.