Its big, solid, well built, and capable. Now the one I am reviewing is the 12v 3500 watt Inverter. Its hooked up to a 400 watt solar system with with a 40amp Renogy charge controller, and a 210 amp hour SLA battery bank. Is it oversized for my system? Mostly, but it works great. I live in California so the sun is fairly plentiful. I wanted the ability to briefly run my microwave and the Keurig coffee maker at the same time (3000 watts). It handles it easily. The Four 110volt A/C outlets on the front are very usable along with the fast charging USB port which charges my phone, from nearly dead, in about 25 minute. I've been able to run my refrigerator/Freezer, clothes washer, and TV's satellite Dish all at the same time. Just plan it during the hours of decent sun. I'm sincerely Loving what I can do with it. Oh, and the additional attachable battery voltage display with the long cord allows me to maintain visual of my battery state of charge without having to go into the cold garage all the time. A nice added bonus. Highly recommend!!I'm going to upgrade my system with more solar panels and a slightly larger battery bank soon so I'm going to a 24v system. looking forward to purchasing a new 24v Vevor Inverter for that.