Hi. I have over 100x SmartSolar 75/15 controllers. I have discovered that when used on a 24v system, even though the jumper is on pins 2+3 (Cutoff should be 23.6v). It does in fact not cut at all. On many of my systems there has been voltage drop all the way down to 17v. I have lost $1000s in destroyed batteries.
Is this a known fault? What can I do about warranty?
I bought them from Access Antenna in Perth, Australia. They have provided no support other than directing me to ask my question here.