When you shop for a PV Solar Grid Tie inverter you are well advised to ensure the unit complies not only with UL testing, but also passes some form of Part 15 Class B test.

This gives you the best chance of not corrupting the communication ability of a licensed communications service such as FEMA and even Amateur Radio.

Even with Part 15 compliance there is a bit of risk involved with installing DC to AC inverters as they are inherently very noisy in radio communication bands. The better ones do their job and do it quietly.

It is absolutely possible for your new PV Solar Electric system to fully comply with Part 15 Class B requirements and still cause interference to a licensed communications service. It is up to you, the owner of the Part 15 equipment, to ensure you do not interfere. If you cannot terminate the interference during operation of your equipment you are obligated to cease use of your system as the licensed services have absolute priority.

It is a popular incorrect notion you have a right to operate any product you can legally purchase.

Checkout the language of the FCC’s Part 15 rules to learn more. Part 15 devices may not pollute the RF communication bands under any circumstances. Also they must accept any interference from primary users. Harsh, but true.

Many folks stumble into this issue often with 802.11 wireless LAN sharing bands with other services on a secondary basis.

Anyway, the point is investors of PV Solar are committing vast amounts of cash into their systems and are taking a big risk with the noise from their inverters. You are 100% responsible for any issues so be careful.

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