The most common letters you will see are “P” for production, “S” for standby, and “F” for fault. What Do the Numbers Mean on an Inverter? The numbers on an inverter indicate the maximum amount of power that the device can handle. The first thing you will see on the screen is a symbol that looks like a sun with rays coming off of it. Most models display only two lines of text at a time and scroll through several informational messages. This screen serves as an information center that shows the performance of the solar power system, from the power generated to the overall condition of the system.
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