I now have 1000 miles on the odo. First time towing a heavy load, did a 75 mile round trip towing 2.5T trailer load. No problem towing but what was interesting for me was when I got back I got the first DPF burn. Which did surprise me after a long towing trip. Fortunately I live quite remote therefore I didn't surprise the neighbours. Also when I stopped the battery was 80% but after the burn it had dropped to 73%, (single battery) obviously those fans take some power. But a few minutes of driving brought the battery back up again. I've noticed the smart alternator tries to keep the battery at 80% unless it is a really long trip. I thought keeping a battery at 80% charge only applied to lithium batteries and not AGM, and other lead acid types.