This product is amazing. I am using it for over a month. It works exactly as it advertised. Very light in weight and silent operation. It has multiple input and output connections that are handy. I tested the over voltage , under voltage protection, works great. When the battery voltage goes below 11 the circuit automatically cuts off the load to protect the batteries. Overall very professional looking product.
A little downside is , if you are in US and buy from Vitor, shipping from Portugal takes time. But dont worry, Vitor is a genuine businessman, he always retained good communication with me when I asked for the update on the shipping delays.
I was so happy with his honesty and communication that, I bought more cool gadget from his shop and will continue to buy.