I have had the 12V 3500W Vevor inverter installed in my RV for over a year as part of a full time off grid solar system. It has performed flawlessly so far and has not given me one moment of trouble. It can even run my rooftop AC in my RV. I love the large quiet cooling fan on the unit. My previous inverter used to be so noisy when the fans kicked on but this one is almost silent. Highly recommend this unit. If my one fails, I will not hesitate to buy another just like it.