What makes some inverters silent and others make a lot of noise even with no load connected to it at all? - Quora
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ALLPOWERS S2000 1500Wh Portable Power Station with Solar Panel Included 2000W Solar Generator with Foldable Solar Panels 200W for Mobile Battery Electric Vehicle RV Emergency : Amazon.ca: Patio, Lawn & Garden
![Help, my parents bought a new solar system and since then my head hurts. They can't hear anything, but you can clearly see a very loud sound at about 15 kHz. They Help, my parents bought a new solar system and since then my head hurts. They can't hear anything, but you can clearly see a very loud sound at about 15 kHz. They](https://preview.redd.it/help-my-parents-bought-a-new-solar-system-and-since-then-my-v0-5t0w5dhpg0ca1.png?auto=webp&s=79e3ac008236829ab319e2aaf4fa305340c87fe7)