Solar System Controller Application and 80A Maximum Current dc charge controller

Buy offer Details

Brand Name : MUST, MUST Color : Yellow / Black.Model Number : PC1800F, PC1800F. {PC 18 -8015 F} Maximum Current : 80A, 60A/80A Product Name : Mppt charge controller. Type : Versatile solar charger, Application : Solar System Controller
I shopping around. I two have bought recently, when one of them failed, than the company did not wanted to acknowledge. In fact nova I cannot contact with them as well.
I shopping around first. Recently I have bought two simular solar regulator from a another chines company. One of them failed. The company did not wanted to acknowledge. In fact nova I cannot contact with them as well. That is the reason.
Q,1
You supplying a communication cable as well. What is the purpose for that.
Do I have to bay something else as well, what I found out later on, software,
or other equipment ??? to operate the regulator efficiently.
Q.2
How much in AU $ to purchase two of this regulators incl. fright to Australia
Q.3
Why Warranty : only 12 months. LCA/Les Sajn Mobile Services P/L we are professional company in installing electronics incl. solars in automotive industry .
Some others give 2 or 3 years warranties.
Thank you
Les Sajn
From : LCA./ Les Sajn Mobile Services P/L