my thought . dirty connector and vibration from the motor . caused a loose connection . and a arc built up and with that arc . heat built up. fun fact . do you know a arc welder runs on about 48v at 50 amps .. humm look at your numbers
https://www.instructables.com/SolarWelder/
i see why you are looking at them the prices are good. let us know how it turned out and how long it took. if they dont respond to your letters questioning things.. specs . info on the panels. ect. then i would worry. its good that you are checking. for all of us. ...
i am a component level tech. and this is not the tubes or the tvs i repaired so. i kept it simple for me used panels for cost savings and new growatt for the easy way it is wired. where are you in doing all the wiring is what i kinda asked .. i am old enough when you bought a stereo it was...
it will keep the battery topped off at nite. bad days. just got in my istabreeze. it should start working at 3.5 miles per hour. and it is well built. or i shall see.. i am looking for the real deal tho . Jacobs windmill .