I researched for 8 months before I purchased the Outback VFX 3524 inverter/charger. I needed something very very dependable. Everyone recommended the Outback inverters. So I finally bought one, and it ran Great one weekend, and then the next weekend It died. So, Outback sent me refurbished replacement boards, and it’s back up and running now. So, essentially I now have a one week old refurbished Outback inverter charger that has an electrical buzzing sound that it didn’t have before, because of the older boards. That gives me no faith in this product for long term dependability. However, I love all the features this inverter has, but I would not recommend it if it’s your only power source like me.