A squeaking Fan-Tastic roof fan is typically caused by worn motor bearings, dirty components, or loose hardware. Most cases can be fixed with cleaning, lubrication, or bearing replacement.
Your MaxxAir/Fantastic fan is likely experiencing a moisture sensor malfunction or rain sensor false trigger. The fix typically involves checking sensor connections, cleaning contacts, or adjusting sensitivity settings.
Ekko with 640Ah lithium and 450W solar can boondock 3-5 days easily, indefinitely in good sun. Monitor usage, charge devices during peak solar hours, and use propane for cooking.