weideer 6 String PV Combiner Box with 15A Fuse Circuit Breaker LED Lightning Arreste Solar Combiner Box with 3 Digit Combination Lock Mounting Plate for Solar Panel System

I did not notice this before ordering but if you look at the picture of the unit on Amazon you will notice that the wire from the fuse block to the circuit breaker is only #10 AWG. Also the wire from the negative lug bar to the circuit breaker is also only a #10 wire. And so if your amperage is near the breaker capacity of 63 Amps that #10 wire will heat up and perhaps cause a failure of the circuit breaker. Also the heat can reduce the current carrying capacity of the wire even more and you will loose precious power from the PV panels. If you look at some of the other brands on Amazon you will see on some of them that the wire going to the circuit breaker is noticeably larger than the individual wires coming from the PV panels.I elected to not return the unit but I removed the # 10 wires in question and replaced them with the same size wire going to my hybrid inverter which for 60 Amps continuous load should be #4 AWG for both the positive and negative wire to the circuit breaker.It seems to me to be slightly amateurish in the engineering department and considering the simplistic nature of the beast you might just want to purchase the components on Amazon and build your own.

This combiner uses 10g wiring to connect all six 15A fuse holders together. The maximum rated amperage for 10g wire is 30a. You can only utilize 5A per string safely. This means even the small 100w 12v panels will be unsafe to use on this. This combiner will only work with 60w or less panels at 12v. This is half the claimed wattage of the device. This product presents a safety risk and should not be sold.I did not discover this issue till after the return window had closed. I reached out to Amazon about it and they did help me out which was great.The company "Weideer" is a TM for a Chinese company so good luck getting anyone to accept liability for this product if you install it and get hurt.After this I checked out a few of the other low cost PV combiners and they all seem to be using under sized wiring. Do yourself a favor and buy a name brand product from someone reputable. It may cost a little more but it will be well worth the extra money.